From b7416cc618bf07fad25a913be5c015bce5a59c02 Mon Sep 17 00:00:00 2001
From: bizzle <bizzle@mac-mini.local>
Date: Thu, 25 Jun 2026 18:33:08 -0400
Subject: [PATCH] feat: UI revamp with sidebar nav and grouped library

Replace top Nav with Sidebar, add lib/group.js for library grouping,
tokenized color/alert styles, and tighter Settings/Canvas export layout.
Adds @tabler/icons-react. Verified production build (standalone) passes,
so the Docker image built from this tree matches the local app.

Co-authored-by: Claude <claude-code@anthropic.com>
---
 app/editor/[id]/page.jsx          | 259 +++++------
 app/globals.css                   | 711 +++++++++++++++++++-----------
 app/layout.jsx                    |   8 +-
 app/library/page.jsx              | 182 ++++----
 app/page.jsx                      | 565 +++++++++++-------------
 app/settings/page.jsx             | 534 ++++++++++------------
 components/CanvasExportDialog.jsx |  16 +-
 components/Nav.jsx                |  65 ---
 components/QuestionCard.jsx       | 414 +++++++++--------
 components/Sidebar.jsx            | 124 ++++++
 lib/group.js                      |  22 +
 package-lock.json                 |  27 ++
 package.json                      |   1 +
 13 files changed, 1564 insertions(+), 1364 deletions(-)
 delete mode 100644 components/Nav.jsx
 create mode 100644 components/Sidebar.jsx
 create mode 100644 lib/group.js

diff --git a/app/editor/[id]/page.jsx b/app/editor/[id]/page.jsx
index 170c387..28d133a 100644
--- a/app/editor/[id]/page.jsx
+++ b/app/editor/[id]/page.jsx
@@ -2,9 +2,13 @@
 // app/editor/[id]/page.jsx — review and refine an assignment, then export it.
 import { useEffect, useRef, useState } from "react";
 import { useParams, useRouter } from "next/navigation";
+import {
+  IconChevronDown, IconRefresh, IconCheck, IconCircleCheck, IconAlertTriangle,
+  IconPlus, IconPencil, IconArrowLeft,
+} from "@tabler/icons-react";
 import QuestionCard from "@/components/QuestionCard";
 import CanvasExportDialog from "@/components/CanvasExportDialog";
-import { QUESTION_TYPES, blankQuestion, totalPoints } from "@/lib/schema";
+import { QUESTION_TYPES, blankQuestion, totalPoints, newId } from "@/lib/schema";
 import { exportTxt, exportDoc, exportClipboard, exportPrint } from "@/lib/exporter";
 
 export default function EditorPage() {
@@ -23,6 +27,8 @@ export default function EditorPage() {
   const [canvasOpen, setCanvasOpen] = useState(false);
   const [error, setError] = useState("");
   const [profile, setProfile] = useState({});
+  const [dragIndex, setDragIndex] = useState(null);
+  const [overIndex, setOverIndex] = useState(null);
   const toastTimer = useRef(null);
 
   useEffect(() => {
@@ -30,19 +36,17 @@ export default function EditorPage() {
       .then(async (r) => {
         const data = await r.json();
         if (!r.ok) throw new Error(data.error || "Could not load this assignment.");
+        // Guarantee every question carries a stable id (older saves may lack one),
+        // so React keys and drag-reorder identity stay unique.
+        data.questions = (data.questions || []).map((q) => (q && q.id ? q : { ...q, id: newId() }));
         setA(data);
       })
       .catch((e) => setLoadErr(String(e.message || e)));
-    fetch("/api/settings")
-      .then((r) => r.json())
-      .then((s) => setProfile(s?.profile || {}))
-      .catch(() => {});
+    fetch("/api/settings").then((r) => r.json()).then((s) => setProfile(s?.profile || {})).catch(() => {});
   }, [id]);
 
   useEffect(() => {
-    function onBeforeUnload(e) {
-      if (dirty) { e.preventDefault(); e.returnValue = ""; }
-    }
+    function onBeforeUnload(e) { if (dirty) { e.preventDefault(); e.returnValue = ""; } }
     window.addEventListener("beforeunload", onBeforeUnload);
     return () => window.removeEventListener("beforeunload", onBeforeUnload);
   }, [dirty]);
@@ -53,17 +57,10 @@ export default function EditorPage() {
     toastTimer.current = setTimeout(() => setToast(""), 2400);
   }
 
-  function patch(p) {
-    setA((cur) => ({ ...cur, ...p }));
-    setDirty(true);
-  }
+  function patch(p) { setA((cur) => ({ ...cur, ...p })); setDirty(true); }
 
   function setQuestion(i, q) {
-    setA((cur) => {
-      const questions = [...cur.questions];
-      questions[i] = q;
-      return { ...cur, questions };
-    });
+    setA((cur) => { const questions = [...cur.questions]; questions[i] = q; return { ...cur, questions }; });
     setDirty(true);
   }
 
@@ -78,6 +75,19 @@ export default function EditorPage() {
     setDirty(true);
   }
 
+  function reorder(from, to) {
+    if (from === to || from == null || to == null) return;
+    setA((cur) => {
+      const questions = [...cur.questions];
+      const [moved] = questions.splice(from, 1);
+      questions.splice(to, 0, moved);
+      return { ...cur, questions };
+    });
+    setDirty(true);
+  }
+
+  function endDrag() { setDragIndex(null); setOverIndex(null); }
+
   function deleteQuestion(i) {
     if (!confirm("Delete question " + (i + 1) + "?")) return;
     setA((cur) => ({ ...cur, questions: cur.questions.filter((_, j) => j !== i) }));
@@ -85,48 +95,31 @@ export default function EditorPage() {
   }
 
   async function save(silent) {
-    setSaving(true);
-    setError("");
+    setSaving(true); setError("");
     try {
-      const res = await fetch("/api/assignments/" + id, {
-        method: "PUT",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify(a),
-      });
+      const res = await fetch("/api/assignments/" + id, { method: "PUT", headers: { "Content-Type": "application/json" }, body: JSON.stringify(a) });
       const data = await res.json();
       if (!res.ok) throw new Error(data.error || "Save failed.");
-      setA(data);
-      setDirty(false);
+      setA(data); setDirty(false);
       if (!silent) showToast("Saved");
-    } catch (e) {
-      setError(String(e.message || e));
-    } finally {
-      setSaving(false);
-    }
+    } catch (e) { setError(String(e.message || e)); }
+    finally { setSaving(false); }
   }
 
   async function regenerateQuestion(i, note) {
     const q = a.questions[i];
-    setBusyQ(q.id);
-    setError("");
+    setBusyQ(q.id); setError("");
     try {
       const data = await postJson("/api/generate", {
-        stage: "question",
-        source: a.source?.text || "",
+        stage: "question", source: a.source?.text || "",
         config: a.config || { assignmentType: a.assignmentType, gradeLevel: a.gradeLevel, subject: a.subject, difficulty: a.difficulty },
-        type: q.type,
-        note,
-        replacing: { question: q.question },
+        type: q.type, note, replacing: { question: q.question },
         existingQuestions: a.questions.filter((_, j) => j !== i).map((x) => ({ question: x.question })),
       });
-      const next = { ...data.question, points: q.points };
-      setQuestion(i, next);
+      setQuestion(i, { ...data.question, points: q.points });
       showToast("Question " + (i + 1) + " regenerated");
-    } catch (e) {
-      setError(String(e.message || e));
-    } finally {
-      setBusyQ(null);
-    }
+    } catch (e) { setError(String(e.message || e)); }
+    finally { setBusyQ(null); }
   }
 
   async function addQuestion(type, withAI) {
@@ -136,89 +129,72 @@ export default function EditorPage() {
       setDirty(true);
       return;
     }
-    setBusyQ("__new__");
-    setError("");
+    setBusyQ("__new__"); setError("");
     try {
       const data = await postJson("/api/generate", {
-        stage: "question",
-        source: a.source?.text || "",
+        stage: "question", source: a.source?.text || "",
         config: a.config || { assignmentType: a.assignmentType, gradeLevel: a.gradeLevel, subject: a.subject, difficulty: a.difficulty },
-        type,
-        existingQuestions: a.questions.map((x) => ({ question: x.question })),
+        type, existingQuestions: a.questions.map((x) => ({ question: x.question })),
       });
       setA((cur) => ({ ...cur, questions: [...cur.questions, data.question] }));
       setDirty(true);
       showToast("Question added");
-    } catch (e) {
-      setError(String(e.message || e));
-    } finally {
-      setBusyQ(null);
-    }
+    } catch (e) { setError(String(e.message || e)); }
+    finally { setBusyQ(null); }
   }
 
   async function reverify() {
-    setVerifying(true);
-    setError("");
+    setVerifying(true); setError("");
     try {
       const data = await postJson("/api/generate", {
-        stage: "verify",
-        source: a.source?.text || "",
+        stage: "verify", source: a.source?.text || "",
         config: a.config || { assignmentType: a.assignmentType, gradeLevel: a.gradeLevel, subject: a.subject, difficulty: a.difficulty },
         questions: a.questions,
       });
       setA((cur) => ({
         ...cur,
         questions: cur.questions.map((q) =>
-          data.verifications[q.id]
-            ? { ...q, verification: data.verifications[q.id] }
-            : { ...q, verification: { status: "unchecked", note: "" } }
-        ),
+          data.verifications[q.id] ? { ...q, verification: data.verifications[q.id] } : { ...q, verification: { status: "unchecked", note: "" } }),
       }));
       setDirty(true);
       const warns = Object.values(data.verifications).filter((v) => v.status === "warn").length;
-      showToast(warns
-        ? `Accuracy check done — ${warns} question${warns === 1 ? "" : "s"} flagged`
-        : "Accuracy check done — all clear"
-      );
-    } catch (e) {
-      setError(String(e.message || e));
-    } finally {
-      setVerifying(false);
-    }
+      showToast(warns ? `Accuracy check done — ${warns} question${warns === 1 ? "" : "s"} flagged` : "Accuracy check done — all clear");
+    } catch (e) { setError(String(e.message || e)); }
+    finally { setVerifying(false); }
   }
 
   function doExport(kind, who) {
     setExportOpen(false);
     const opts = who === "packet" ? { packet: true, profile } : { teacher: who === true, profile };
     try {
-      if (kind === "txt")   { exportTxt(a, opts); showToast("Downloaded .txt"); }
-      if (kind === "doc")   { exportDoc(a, opts); showToast("Downloaded Word file"); }
+      if (kind === "txt") { exportTxt(a, opts); showToast("Downloaded .txt"); }
+      if (kind === "doc") { exportDoc(a, opts); showToast("Downloaded Word file"); }
       if (kind === "print") { exportPrint(a, opts); }
-      if (kind === "copy")  { exportClipboard(a, opts).then(() => showToast("Copied to clipboard")); }
-    } catch (e) {
-      setError(String(e.message || e));
-    }
+      if (kind === "copy") { exportClipboard(a, opts).then(() => showToast("Copied to clipboard")); }
+    } catch (e) { setError(String(e.message || e)); }
   }
 
   if (loadErr) {
     return (
-      <div className="empty">
-        <h3>Couldn&rsquo;t open that assignment</h3>
-        <p>{loadErr}</p>
-        <button className="btn btn-primary" style={{ marginTop: 12 }} onClick={() => router.push("/library")}>Go to Library</button>
+      <div className="page page-narrow">
+        <div className="empty">
+          <h3>Couldn&rsquo;t open that assignment</h3>
+          <p>{loadErr}</p>
+          <button className="btn btn-primary" style={{ marginTop: 12 }} onClick={() => router.push("/library")}>Go to Library</button>
+        </div>
       </div>
     );
   }
 
   if (!a) {
     return (
-      <div style={{ padding: "40px 0" }}>
-        <div className="card skeleton-card" style={{ marginBottom: 16 }}>
+      <div className="page page-narrow">
+        <div className="panel panel-pad skeleton-card" style={{ marginBottom: 16 }}>
           <div className="skeleton-line" style={{ width: "60%", height: 28, borderRadius: 6, marginBottom: 12 }} />
           <div className="skeleton-line short" />
         </div>
         {[0, 1, 2].map((i) => (
-          <div key={i} className="card skeleton-card" style={{ marginBottom: 14, animationDelay: `${i * 0.15}s` }}>
+          <div key={i} className="panel panel-pad skeleton-card" style={{ marginBottom: 14 }}>
             <div className="skeleton-chip" />
             <div className="skeleton-line full" />
             <div className="skeleton-line medium" />
@@ -232,79 +208,69 @@ export default function EditorPage() {
   const uncheckedCount = a.questions.filter((q) => !q.verification || q.verification.status === "unchecked").length;
 
   return (
-    <div>
-      <div className="page-head" style={{ display: "flex", alignItems: "flex-start", gap: 12, flexWrap: "wrap" }}>
+    <div className="page page-narrow">
+      <h1 className="sr-only">{a.title || "Untitled assignment"}</h1>
+      <div className="page-head" style={{ display: "flex", alignItems: "flex-start", gap: 12, flexWrap: "wrap", marginBottom: 18 }}>
         <div style={{ flex: 1, minWidth: 260 }}>
-          <input
-            type="text"
-            value={a.title}
-            onChange={(e) => patch({ title: e.target.value })}
-            aria-label="Assignment title"
-            style={{
-              fontFamily: "var(--font-display)", fontSize: "1.6rem", fontWeight: 700,
-              border: "1.5px solid transparent", background: "transparent",
-              padding: "4px 8px", marginLeft: -8, borderRadius: 8, width: "100%",
-              transition: "border-color 0.15s, background 0.15s",
-            }}
-            onFocus={(e) => { e.target.style.borderColor = "var(--line-strong)"; e.target.style.background = "var(--field-bg)"; }}
-            onBlur={(e) => { e.target.style.borderColor = "transparent"; e.target.style.background = "transparent"; }}
-          />
-          <p className="muted small" style={{ margin: "4px 0 0 2px" }}>
+          <div className="title-edit">
+            <input type="text" value={a.title} onChange={(e) => patch({ title: e.target.value })} aria-label="Assignment title" placeholder="Untitled assignment" />
+            <IconPencil size={17} className="pen" />
+          </div>
+          <p className="muted small" style={{ margin: "6px 0 0 2px" }}>
             {[a.assignmentType?.replace("_", " "), a.gradeLevel, a.subject].filter(Boolean).join(" · ")} · {a.questions.length} questions · {totalPoints(a.questions)} points
             {a.source?.name ? <> · from <i>{a.source.name}</i></> : null}
           </p>
         </div>
         <div style={{ display: "flex", gap: 8, flexWrap: "wrap" }}>
           <div style={{ position: "relative" }}>
-            <button className="btn" onClick={() => { setExportOpen((o) => !o); setAddOpen(false); }}>Export ▾</button>
+            <button className="btn" onClick={() => { setExportOpen((o) => !o); setAddOpen(false); }}>Export <IconChevronDown size={15} /></button>
             {exportOpen && (
-              <div className="card" style={{ position: "absolute", right: 0, top: "calc(100% + 6px)", zIndex: 30, width: 295, padding: 16, animation: "fade-in-up 0.18s ease" }}>
+              <div className="pop" style={{ position: "absolute", right: 0, top: "calc(100% + 6px)", zIndex: 30, width: 300, padding: 16 }}>
                 <div className="field-label">Student version</div>
-                <div style={{ display: "flex", gap: 6, flexWrap: "wrap", marginBottom: 12 }}>
+                <div style={{ display: "flex", gap: 6, flexWrap: "wrap", marginBottom: 14 }}>
                   <button className="btn btn-sm" onClick={() => doExport("print", false)}>Print / PDF</button>
                   <button className="btn btn-sm" onClick={() => doExport("doc", false)}>Word</button>
                   <button className="btn btn-sm" onClick={() => doExport("txt", false)}>Text</button>
                   <button className="btn btn-sm" onClick={() => doExport("copy", false)}>Copy</button>
                 </div>
                 <div className="field-label" style={{ color: "var(--redpen)" }}>Teacher version (answer key)</div>
-                <div style={{ display: "flex", gap: 6, flexWrap: "wrap", marginBottom: 12 }}>
+                <div style={{ display: "flex", gap: 6, flexWrap: "wrap", marginBottom: 14 }}>
                   <button className="btn btn-sm" onClick={() => doExport("print", true)}>Print / PDF</button>
                   <button className="btn btn-sm" onClick={() => doExport("doc", true)}>Word</button>
                   <button className="btn btn-sm" onClick={() => doExport("txt", true)}>Text</button>
                   <button className="btn btn-sm" onClick={() => doExport("copy", true)}>Copy</button>
                 </div>
                 <div className="field-label">Complete packet — student + answer key</div>
-                <div style={{ display: "flex", gap: 6, flexWrap: "wrap", marginBottom: 12 }}>
+                <div style={{ display: "flex", gap: 6, flexWrap: "wrap", marginBottom: 14 }}>
                   <button className="btn btn-sm" onClick={() => doExport("print", "packet")}>Print / PDF</button>
                   <button className="btn btn-sm" onClick={() => doExport("doc", "packet")}>Word</button>
                 </div>
                 <div className="field-label">Canvas (LMS)</div>
-                <button className="btn btn-sm" onClick={() => { setExportOpen(false); setCanvasOpen(true); }}>
-                  Set up &amp; download .zip…
-                </button>
+                <button className="btn btn-sm" onClick={() => { setExportOpen(false); setCanvasOpen(true); }}>Set up &amp; download .zip…</button>
               </div>
             )}
           </div>
           <button className="btn" onClick={reverify} disabled={verifying || !a.source?.text}>
-            {verifying ? <><span className="spinner" /> Checking…</> : "Re-run accuracy check"}
+            {verifying ? <><span className="spinner" /> Checking…</> : <><IconRefresh size={15} /> Re-run accuracy check</>}
           </button>
           <button className="btn btn-primary" onClick={() => save(false)} disabled={saving || !dirty}>
-            {saving ? <><span className="spinner" /> Saving…</> : dirty ? "Save" : "Saved ✓"}
+            {saving ? <><span className="spinner" /> Saving…</> : dirty ? "Save" : <>Saved <IconCheck size={15} /></>}
           </button>
         </div>
       </div>
 
-      {error && <div className="alert alert-error">{error}</div>}
+      {error && <div className="alert alert-error"><IconAlertTriangle size={17} /> <span>{error}</span></div>}
       {warnCount > 0 && (
         <div className="alert alert-warn">
-          <b>{warnCount} question{warnCount === 1 ? "" : "s"} flagged by the accuracy check.</b> Look for the ⚠ stamps below — each has a reviewer note. Edit or regenerate those questions, then re-run the check.
+          <IconAlertTriangle size={17} />
+          <span><b>{warnCount} question{warnCount === 1 ? "" : "s"} flagged by the accuracy check.</b> Look for the ⚠ stamps below — each has a reviewer note. Edit or regenerate those questions, then re-run the check.</span>
         </div>
       )}
       {warnCount === 0 && uncheckedCount === 0 && a.questions.length > 0 && (
-        <div className="alert alert-info">✓ Every question passed the accuracy check against your source.</div>
+        <div className="alert alert-info"><IconCircleCheck size={17} /> <span>Every question passed the accuracy check against your source.</span></div>
       )}
 
-      <label className="field">
+      <label className="field" style={{ marginTop: 8 }}>
         <span className="field-label">Student instructions</span>
         <textarea rows={2} value={a.instructions || ""} onChange={(e) => patch({ instructions: e.target.value })} placeholder="Instructions students see at the top…" />
       </label>
@@ -316,35 +282,40 @@ export default function EditorPage() {
         </label>
       ) : null}
 
-      {a.questions.map((q, i) => (
-        <QuestionCard
-          key={q.id}
-          q={q}
-          index={i}
-          count={a.questions.length}
-          busy={busyQ === q.id}
-          onChange={(next) => setQuestion(i, next)}
-          onMove={(dir) => moveQuestion(i, dir)}
-          onDelete={() => deleteQuestion(i)}
-          onRegenerate={(note) => regenerateQuestion(i, note)}
-        />
-      ))}
+      {/* the questions as one continuous document */}
+      <div className="panel doc" style={{ marginTop: 16 }}>
+        {a.questions.map((q, i) => (
+          <QuestionCard
+            key={q.id}
+            q={q}
+            index={i}
+            count={a.questions.length}
+            busy={busyQ === q.id}
+            dragging={dragIndex === i}
+            over={overIndex === i && dragIndex !== i}
+            onChange={(next) => setQuestion(i, next)}
+            onMove={(dir) => moveQuestion(i, dir)}
+            onDelete={() => deleteQuestion(i)}
+            onRegenerate={(note) => regenerateQuestion(i, note)}
+            onDragStart={() => setDragIndex(i)}
+            onDragEnter={() => { if (dragIndex !== null && dragIndex !== i) setOverIndex(i); }}
+            onDrop={() => { reorder(dragIndex, i); endDrag(); }}
+            onDragEnd={endDrag}
+          />
+        ))}
+      </div>
 
-      <div style={{ marginTop: 18, position: "relative", display: "flex", gap: 10 }}>
+      <div style={{ marginTop: 18, position: "relative", display: "flex", gap: 10, alignItems: "center" }}>
         <button className="btn" onClick={() => { setAddOpen((o) => !o); setExportOpen(false); }} disabled={busyQ === "__new__"}>
-          {busyQ === "__new__" ? <><span className="spinner" /> Writing question…</> : "+ Add question ▾"}
+          {busyQ === "__new__" ? <><span className="spinner" /> Writing question…</> : <><IconPlus size={16} /> Add question <IconChevronDown size={14} /></>}
         </button>
         {addOpen && (
-          <div className="card" style={{ position: "absolute", left: 0, bottom: "calc(100% + 6px)", zIndex: 30, width: 324, padding: 16, animation: "fade-in-up 0.18s ease" }}>
+          <div className="pop" style={{ position: "absolute", left: 0, bottom: "calc(100% + 6px)", zIndex: 30, width: 324, padding: 16 }}>
             {[...QUESTION_TYPES, { id: "discussion", label: "Discussion prompt" }].map((t) => (
-              <div key={t.id} style={{ display: "flex", alignItems: "center", gap: 8, padding: "5px 0", borderBottom: "1px solid var(--line)" }}>
+              <div key={t.id} style={{ display: "flex", alignItems: "center", gap: 8, padding: "6px 0", borderBottom: "1px solid var(--line)" }}>
                 <span style={{ flex: 1, fontSize: "0.92rem", fontWeight: 600 }}>{t.label}</span>
-                <button
-                  className="btn btn-sm btn-primary"
-                  onClick={() => addQuestion(t.id, true)}
-                  disabled={!a.source?.text}
-                  title={a.source?.text ? "Generate from your source" : "No source stored with this assignment"}
-                >AI</button>
+                <button className="btn btn-sm btn-primary" onClick={() => addQuestion(t.id, true)} disabled={!a.source?.text}
+                  title={a.source?.text ? "Generate from your source" : "No source stored with this assignment"}>AI</button>
                 <button className="btn btn-sm" onClick={() => addQuestion(t.id, false)}>Blank</button>
               </div>
             ))}
@@ -352,7 +323,7 @@ export default function EditorPage() {
         )}
         <span className="spacer" />
         <span className="muted small" style={{ alignSelf: "center" }}>
-          Total: <b>{totalPoints(a.questions)}</b> points
+          Total: <b style={{ fontFamily: "var(--font-display)", fontWeight: 700, fontSize: "1.05rem", color: "var(--ink)" }}>{totalPoints(a.questions)}</b> points
         </span>
       </div>
 
@@ -371,11 +342,7 @@ export default function EditorPage() {
 }
 
 async function postJson(url, body) {
-  const res = await fetch(url, {
-    method: "POST",
-    headers: { "Content-Type": "application/json" },
-    body: JSON.stringify(body),
-  });
+  const res = await fetch(url, { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(body) });
   const data = await res.json().catch(() => ({}));
   if (!res.ok) throw new Error(data.error || `Request failed (${res.status}).`);
   return data;
diff --git a/app/globals.css b/app/globals.css
index 3a2b231..e4771eb 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -1,13 +1,14 @@
 /* Google Fonts — must come before the Tailwind import */
-@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Lora:wght@600;700&display=swap");
+@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Lora:wght@500;600;700&display=swap");
 
 @import "tailwindcss";
 
 /* =============================================================================
-   Mr. Drew's Assignment Creator — design system
-   Identity: a well-kept teacher's desk. Lora serif headings, chalkboard
-   green for primary actions, and the signature: everything answer-key wears
-   red pen — the color teachers actually grade in.
+   Mr. Drew's Assignment Creator — design system  ("Open Workspace")
+   Identity: a well-kept teacher's desk, now laid out as a workspace.
+   A solid chalkboard-green sidebar, flat ruled surfaces (elevation is earned,
+   not decorative), Lora serif for authority, and the signature: everything
+   in the answer key wears red pen — the color teachers actually grade in.
    ============================================================================= */
 
 @layer base {
@@ -17,13 +18,16 @@
     --panel: #ffffff;
     --ink: #1e2d28;
     --ink-soft: #58706a;
+    --ink-faint: #8aa099;
     --board: #2f6b58;
     --board-deep: #245546;
     --board-tint: #e4eeea;
     --board-glow: rgba(47, 107, 88, 0.12);
     --redpen: #b8412f;
+    --redpen-ink: #8c3022;
     --redpen-tint: #faece9;
     --gold: #b98a23;
+    --gold-ink: #7a5a14;
     --gold-tint: #faf3e2;
     --line: #dde4df;
     --line-strong: #c5d0cb;
@@ -32,9 +36,24 @@
     --tab-track: #e6ecea;
     --chip-neutral-bg: #eaeeec;
     --empty-bg: #fafcfb;
-    --shadow-sm: 0 1px 3px rgba(34, 49, 44, 0.07), 0 2px 8px rgba(34, 49, 44, 0.05);
-    --shadow: 0 2px 6px rgba(34, 49, 44, 0.06), 0 6px 20px rgba(34, 49, 44, 0.07);
-    --shadow-lg: 0 8px 32px rgba(34, 49, 44, 0.12), 0 2px 8px rgba(34, 49, 44, 0.06);
+    --disabled-bg: #eaeeec;
+    --disabled-ink: #97a8a2;
+
+    /* tokenized feedback colors (light) */
+    --alert-error-bg: var(--redpen-tint);
+    --alert-error-border: #e8c5be;
+    --alert-error-ink: var(--redpen-ink);
+    --alert-warn-bg: var(--gold-tint);
+    --alert-warn-border: #e9d8a6;
+    --alert-warn-ink: var(--gold-ink);
+    --alert-info-bg: var(--board-tint);
+    --alert-info-border: #cde0d8;
+    --alert-info-ink: var(--board-deep);
+
+    --shadow-sm: 0 1px 2px rgba(34, 49, 44, 0.05);
+    /* elevation is reserved for things that truly float */
+    --shadow-pop: 0 10px 34px rgba(34, 49, 44, 0.14), 0 2px 8px rgba(34, 49, 44, 0.06);
+    --shadow-modal: 0 24px 60px rgba(20, 30, 26, 0.28), 0 4px 14px rgba(20, 30, 26, 0.14);
     color-scheme: light;
 
     /* type */
@@ -47,6 +66,8 @@
     --radius-xs: 5px;
     --transition: 0.18s ease;
     --transition-fast: 0.1s ease;
+
+    --sidebar-w: 264px;
   }
 
   /* The same desk after dark */
@@ -55,13 +76,16 @@
     --panel: #1b2320;
     --ink: #e2eae5;
     --ink-soft: #92aaa2;
+    --ink-faint: #6c847c;
     --board: #4d9c82;
     --board-deep: #7bc0a8;
     --board-tint: #1e3028;
     --board-glow: rgba(77, 156, 130, 0.15);
     --redpen: #e07a63;
+    --redpen-ink: #f0a795;
     --redpen-tint: #38221e;
     --gold: #d3a94c;
+    --gold-ink: #e2c47e;
     --gold-tint: #342d1a;
     --line: #263028;
     --line-strong: #374440;
@@ -70,18 +94,27 @@
     --tab-track: #161d1a;
     --chip-neutral-bg: #262f2b;
     --empty-bg: #171e1a;
-    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.25);
-    --shadow: 0 2px 6px rgba(0, 0, 0, 0.3), 0 6px 20px rgba(0, 0, 0, 0.3);
-    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
+    --disabled-bg: #222b27;
+    --disabled-ink: #5d726b;
+
+    --alert-error-bg: var(--redpen-tint);
+    --alert-error-border: #5a2f26;
+    --alert-error-ink: #f0a795;
+    --alert-warn-bg: var(--gold-tint);
+    --alert-warn-border: #564820;
+    --alert-warn-ink: #e2c47e;
+    --alert-info-bg: var(--board-tint);
+    --alert-info-border: #2d5040;
+    --alert-info-ink: #8dcbb5;
+
+    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
+    --shadow-pop: 0 12px 36px rgba(0, 0, 0, 0.5), 0 2px 8px rgba(0, 0, 0, 0.3);
+    --shadow-modal: 0 24px 60px rgba(0, 0, 0, 0.6), 0 4px 14px rgba(0, 0, 0, 0.4);
     color-scheme: dark;
   }
 
-  html[data-theme="dark"] .alert-error { border-color: #5a2f26; color: #f0a795; }
-  html[data-theme="dark"] .alert-warn { border-color: #564820; color: #e2c47e; }
-  html[data-theme="dark"] .alert-info { border-color: #2d5040; color: #8dcbb5; }
   html[data-theme="dark"] .toast { background: #e2eae5; color: #111815; }
   html[data-theme="dark"] .brand-mark { color: #f1f5f2; }
-  html[data-theme="dark"] .nav-scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.5); }
 
   * { box-sizing: border-box; }
 
@@ -91,21 +124,23 @@
     background: var(--paper);
     color: var(--ink);
     font-family: var(--font-body);
-    font-size: 15.5px;
-    line-height: 1.58;
+    font-size: 14.75px;
+    line-height: 1.6;
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
   }
 
+  /* Wider, clearer type ramp — levels separated by size AND family/weight */
   h1, h2, h3 {
     font-family: var(--font-display);
     font-weight: 700;
-    letter-spacing: -0.01em;
+    letter-spacing: -0.012em;
     margin: 0;
-    line-height: 1.25;
+    line-height: 1.2;
+    color: var(--ink);
   }
-  h1 { font-size: 1.85rem; }
-  h2 { font-size: 1.3rem; }
+  h1 { font-size: 2.1rem; }
+  h2 { font-size: 1.35rem; }
   h3 { font-size: 1.08rem; }
 
   a { color: var(--board); text-decoration: none; }
@@ -123,13 +158,13 @@
 }
 
 /* =====================================================================
-   KEYFRAME ANIMATIONS
+   KEYFRAME ANIMATIONS  (used sparingly — overlays & real state changes)
    ===================================================================== */
 
 @keyframes spin { to { transform: rotate(360deg); } }
 
 @keyframes fade-in-up {
-  from { opacity: 0; transform: translateY(10px); }
+  from { opacity: 0; transform: translateY(8px); }
   to   { opacity: 1; transform: translateY(0); }
 }
 
@@ -145,305 +180,402 @@
 
 @keyframes step-complete {
   0%   { transform: scale(1); }
-  50%  { transform: scale(1.2); }
+  50%  { transform: scale(1.18); }
   100% { transform: scale(1); }
 }
 
 @keyframes skeleton-pulse {
   0%, 100% { opacity: 0.55; }
-  50%       { opacity: 1; }
+  50%      { opacity: 1; }
 }
 
-@keyframes progress-fill {
-  from { width: 0%; }
-  to   { width: 100%; }
-}
-
-@keyframes spin-ring {
-  0%   { transform: rotate(0deg); stroke-dashoffset: 60; }
-  50%  { stroke-dashoffset: 15; }
-  100% { transform: rotate(360deg); stroke-dashoffset: 60; }
-}
-
-/* =====================================================================
-   LAYOUT SHELL
-   ===================================================================== */
-
 @layer components {
-  .shell { max-width: 1020px; margin: 0 auto; padding: 32px 22px 90px; }
 
-  /* ---------- navigation ---------- */
-  .topnav {
-    background: rgba(255, 255, 255, 0.85);
-    backdrop-filter: blur(14px);
-    -webkit-backdrop-filter: blur(14px);
-    border-bottom: 1px solid var(--line);
-    position: sticky; top: 0; z-index: 50;
-    transition: box-shadow var(--transition);
+  /* =====================================================================
+     APP SHELL — fixed left sidebar + scrolling content
+     ===================================================================== */
+  .app { display: flex; min-height: 100vh; align-items: stretch; }
+
+  .content { flex: 1; min-width: 0; }
+  /* pages opt into padding; the Create flow renders full-bleed */
+  .page { padding: 36px 48px 90px; }
+  .page-narrow { max-width: 1120px; }
+
+  /* ---------- sidebar ---------- */
+  .sidebar {
+    width: var(--sidebar-w); flex: none;
+    background: var(--panel);
+    border-right: 1px solid var(--line);
+    display: flex; flex-direction: column;
+    position: sticky; top: 0; height: 100vh;
+    z-index: 40;
   }
-  html[data-theme="dark"] .topnav {
-    background: rgba(27, 35, 32, 0.85);
+  .sidebar-brand {
+    display: flex; align-items: center; gap: 11px;
+    padding: 20px 18px 16px;
+    white-space: nowrap; text-decoration: none;
   }
-  .topnav.nav-scrolled {
-    box-shadow: 0 4px 24px rgba(34, 49, 44, 0.1);
-    border-bottom-color: var(--line-strong);
-  }
-  .topnav-inner {
-    max-width: 1020px; margin: 0 auto; padding: 0 22px;
-    display: flex; align-items: center; gap: 24px; height: 60px;
-  }
-  .brand {
-    font-family: var(--font-display); font-size: 1.08rem; font-weight: 700; color: var(--ink);
-    display: flex; align-items: center; gap: 10px; white-space: nowrap;
-  }
-  .brand:hover { text-decoration: none; }
+  .sidebar-brand:hover { text-decoration: none; }
   .brand-mark {
-    width: 30px; height: 30px; border-radius: 8px;
+    width: 34px; height: 34px; border-radius: 9px; flex: none;
     background: linear-gradient(135deg, var(--board) 0%, var(--board-deep) 100%);
     color: #fff;
     display: inline-flex; align-items: center; justify-content: center;
-    font-size: 15px; flex: none;
     box-shadow: 0 2px 6px rgba(47, 107, 88, 0.35);
   }
-  .navlinks { display: flex; gap: 2px; margin-left: auto; }
-  .theme-toggle {
-    flex: none; width: 36px; height: 36px; border-radius: 9px;
-    font-size: 1rem; transition: background var(--transition), transform var(--transition-fast);
-  }
-  .theme-toggle:hover { transform: rotate(18deg); }
-  .navlink {
-    padding: 7px 14px; border-radius: var(--radius-sm); color: var(--ink-soft);
-    font-weight: 500; font-size: 0.93rem; transition: background var(--transition), color var(--transition);
-  }
-  .navlink:hover { background: var(--hover-bg); color: var(--ink); text-decoration: none; }
-  .navlink.active { background: var(--board-tint); color: var(--board-deep); font-weight: 600; }
+  .brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; color: var(--ink); line-height: 1.15; }
+  .brand-sub { font-size: 0.72rem; color: var(--ink-soft); font-weight: 500; }
 
-  /* ---------- cards & panels ---------- */
+  .sidebar-nav { padding: 4px 12px; display: flex; flex-direction: column; gap: 2px; }
+  .navrow {
+    display: flex; align-items: center; gap: 11px;
+    height: 40px; padding: 0 12px; border-radius: var(--radius-sm);
+    color: var(--ink-soft); font-weight: 500; font-size: 0.93rem; cursor: pointer;
+    transition: background var(--transition), color var(--transition);
+  }
+  .navrow:hover { background: var(--hover-bg); color: var(--ink); text-decoration: none; }
+  .navrow.active { background: var(--board-tint); color: var(--board-deep); font-weight: 600; }
+  .navrow svg { flex: none; }
+
+  .sidebar-scroll { flex: 1; overflow-y: auto; padding: 8px 12px 12px; }
+  .sidebar-label {
+    display: flex; align-items: center; justify-content: space-between;
+    padding: 10px 10px 8px;
+    font-family: var(--font-mono); font-size: 0.66rem; font-weight: 700;
+    letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft);
+  }
+
+  /* library folder tree */
+  .tree-group { margin-bottom: 1px; }
+  .tree-folder {
+    display: flex; align-items: center; gap: 8px;
+    width: 100%; text-align: left;
+    padding: 7px 10px; border: 0; background: none;
+    border-radius: var(--radius-xs); cursor: pointer;
+    color: var(--ink); font-family: var(--font-body); font-weight: 600; font-size: 0.83rem;
+    transition: background var(--transition);
+  }
+  .tree-folder:hover { background: var(--hover-bg); }
+  .tree-folder .chev { transition: transform var(--transition); color: var(--ink-soft); flex: none; }
+  .tree-folder .tree-count { margin-left: auto; font-size: 0.72rem; color: var(--ink-faint); font-weight: 600; }
+  .tree-leaf {
+    display: flex; align-items: center; gap: 8px;
+    padding: 6px 10px 6px 30px; border-radius: var(--radius-xs);
+    color: var(--ink-soft); font-size: 0.82rem; cursor: pointer; text-decoration: none;
+    transition: background var(--transition), color var(--transition);
+  }
+  .tree-leaf:hover { background: var(--hover-bg); color: var(--ink); text-decoration: none; }
+  .tree-leaf.active { background: var(--board-tint); color: var(--board-deep); font-weight: 600; }
+  .tree-leaf span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+
+  .sidebar-foot {
+    padding: 12px; border-top: 1px solid var(--line);
+    display: flex; align-items: center; gap: 10px;
+  }
+
+  /* mobile top-bar fallback */
+  .sidebar-toggle { display: none; }
+
+  /* ---------- page heading ---------- */
+  .page-head { margin: 2px 0 26px; }
+  .page-head p { color: var(--ink-soft); margin: 9px 0 0; max-width: 64ch; font-size: 0.97rem; }
+
+  /* ---------- surfaces ---------- */
+  /* Flat panel — ONE separator (a hairline border). No resting shadow. */
+  .panel {
+    background: var(--panel);
+    border: 1px solid var(--line);
+    border-radius: var(--radius);
+  }
+  .panel-pad { padding: 24px; }
+
+  /* legacy alias kept lean: a flat bordered surface, no decorative shadow */
   .card {
     background: var(--panel);
     border: 1px solid var(--line);
     border-radius: var(--radius);
-    box-shadow: var(--shadow-sm);
     padding: 24px;
-    transition: box-shadow var(--transition), border-color var(--transition), transform 0.2s ease;
-    animation: fade-in-up 0.3s ease both;
+    transition: border-color var(--transition);
   }
   .card + .card { margin-top: 16px; }
-  .card:hover { box-shadow: var(--shadow); }
 
-  .card-lift:hover {
-    box-shadow: var(--shadow-lg);
-    transform: translateY(-2px);
-    border-color: var(--line-strong);
+  /* The only things that float get real elevation */
+  .pop {
+    background: var(--panel);
+    border: 1px solid var(--line);
+    border-radius: var(--radius);
+    box-shadow: var(--shadow-pop);
+    animation: fade-in-up 0.16s ease both;
   }
 
-  .page-head { margin: 4px 0 24px; }
-  .page-head p { color: var(--ink-soft); margin: 8px 0 0; max-width: 62ch; font-size: 0.97rem; }
-
   /* ---------- buttons ---------- */
   .btn {
     appearance: none;
     border: 1px solid var(--line-strong);
     background: var(--panel);
     color: var(--ink);
-    font: inherit; font-family: var(--font-body); font-weight: 600; font-size: 0.92rem;
-    padding: 9px 17px; border-radius: var(--radius-sm); cursor: pointer;
+    font: inherit; font-family: var(--font-body); font-weight: 600; font-size: 0.9rem;
+    padding: 9px 16px; border-radius: var(--radius-sm); cursor: pointer;
     display: inline-flex; align-items: center; gap: 7px;
     transition: background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition-fast);
     white-space: nowrap; user-select: none;
   }
-  .btn:hover {
-    background: var(--hover-bg);
-    border-color: var(--board);
-    box-shadow: 0 1px 4px var(--board-glow);
+  .btn:hover { background: var(--hover-bg); border-color: var(--board); }
+  .btn:active { transform: translateY(1px); }
+  .btn:disabled {
+    background: var(--disabled-bg); color: var(--disabled-ink);
+    border-color: var(--line); cursor: not-allowed; transform: none;
   }
-  .btn:active { transform: translateY(1px); box-shadow: none; }
-  .btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }
 
   .btn-primary {
-    background: var(--board);
-    border-color: var(--board);
-    color: #fff;
+    background: var(--board); border-color: var(--board); color: #fff;
     box-shadow: 0 2px 6px rgba(47, 107, 88, 0.25);
   }
-  .btn-primary:hover {
-    background: var(--board-deep);
-    border-color: var(--board-deep);
-    box-shadow: 0 4px 14px rgba(47, 107, 88, 0.35);
+  .btn-primary:hover { background: var(--board-deep); border-color: var(--board-deep); box-shadow: 0 4px 14px rgba(47, 107, 88, 0.32); }
+  html[data-theme="dark"] .btn-primary { color: #0d1512; }
+  .btn-primary:disabled { background: var(--disabled-bg); color: var(--disabled-ink); border-color: var(--line); box-shadow: none; }
+
+  .btn-danger { color: var(--redpen); border-color: var(--line-strong); background: var(--panel); }
+  .btn-danger:hover { background: var(--redpen-tint); border-color: var(--redpen); }
+
+  .btn-ghost { border-color: transparent; background: none; }
+  .btn-ghost:hover { background: var(--hover-bg); border-color: transparent; }
+
+  .btn-sm { padding: 6px 12px; font-size: 0.83rem; border-radius: var(--radius-xs); }
+  .btn-lg { padding: 12px 24px; font-size: 0.98rem; border-radius: var(--radius); }
+  .btn-block { width: 100%; justify-content: center; }
+
+  /* ---------- icon button (min 36px touch target) ---------- */
+  .icon-btn {
+    border: 1px solid var(--line); background: var(--field-bg); border-radius: var(--radius-xs);
+    width: 36px; height: 36px; cursor: pointer; line-height: 1; flex: none;
+    display: inline-flex; align-items: center; justify-content: center; color: var(--ink-soft);
+    transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition-fast);
   }
-
-  .btn-danger { color: var(--redpen); border-color: var(--line-strong); }
-  .btn-danger:hover { background: var(--redpen-tint); border-color: var(--redpen); box-shadow: none; }
-
-  .btn-sm { padding: 5px 11px; font-size: 0.84rem; border-radius: var(--radius-xs); }
-  .btn-lg { padding: 12px 26px; font-size: 1rem; border-radius: var(--radius); }
+  .icon-btn:hover { border-color: var(--board); color: var(--ink); background: var(--board-tint); }
+  .icon-btn:disabled { background: var(--disabled-bg); color: var(--disabled-ink); border-color: var(--line); cursor: default; }
+  .icon-btn.danger:hover { border-color: var(--redpen); color: var(--redpen); background: var(--redpen-tint); }
+  .theme-toggle { width: 40px; height: 40px; border-radius: 9px; }
 
   /* ---------- forms ---------- */
-  label.field { display: block; margin-bottom: 14px; }
-  .field-label { display: block; font-weight: 600; font-size: 0.87rem; margin-bottom: 5px; color: var(--ink); letter-spacing: 0.01em; }
-  .field-hint { font-size: 0.82rem; color: var(--ink-soft); margin-top: 5px; line-height: 1.5; }
+  label.field { display: block; margin-bottom: 16px; }
+  .field-label {
+    display: block; font-family: var(--font-mono); font-weight: 700; font-size: 0.7rem;
+    letter-spacing: 0.08em; text-transform: uppercase;
+    margin-bottom: 7px; color: var(--ink-soft);
+  }
+  .field-hint { font-size: 0.82rem; color: var(--ink-soft); margin-top: 6px; line-height: 1.5; }
 
   input[type="text"], input[type="password"], input[type="number"], input[type="url"], select, textarea {
-    width: 100%;
-    font: inherit;
-    font-family: var(--font-body);
-    color: var(--ink);
-    background: var(--field-bg);
-    border: 1.5px solid var(--line-strong);
-    border-radius: var(--radius-sm);
+    width: 100%; font: inherit; font-family: var(--font-body);
+    color: var(--ink); background: var(--field-bg);
+    border: 1.5px solid var(--line-strong); border-radius: var(--radius-sm);
     padding: 9px 12px;
     transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
   }
   input:focus, select:focus, textarea:focus {
-    border-color: var(--board);
-    outline: none;
-    box-shadow: 0 0 0 3px var(--board-glow);
-    background: var(--field-bg);
+    border-color: var(--board); outline: none; box-shadow: 0 0 0 3px var(--board-glow);
   }
-  textarea { resize: vertical; min-height: 80px; }
+  textarea { resize: vertical; min-height: 80px; line-height: 1.6; }
+  ::placeholder { color: var(--ink-faint); }
 
-  .row { display: flex; gap: 14px; flex-wrap: wrap; }
+  /* underline-only "paper form" input — used on Settings */
+  .ul-field { display: block; margin-bottom: 20px; }
+  .ul-input {
+    width: 100%; font: inherit; font-family: var(--font-body); font-size: 0.95rem;
+    color: var(--ink); background: transparent;
+    border: 0; border-bottom: 1.5px solid var(--line-strong);
+    border-radius: 0; padding: 8px 2px;
+    transition: border-color var(--transition);
+  }
+  .ul-input:focus { outline: none; border-bottom-color: var(--board); box-shadow: none; }
+  select.ul-input { padding-left: 0; }
+
+  .row { display: flex; gap: 18px; flex-wrap: wrap; }
   .row > * { flex: 1; min-width: 180px; }
 
   .check {
-    display: flex; align-items: flex-start; gap: 10px; margin: 10px 0; cursor: pointer;
-    padding: 8px 10px; border-radius: var(--radius-xs); transition: background var(--transition);
+    display: flex; align-items: flex-start; gap: 11px; margin: 10px 0; cursor: pointer;
   }
-  .check:hover { background: var(--hover-bg); }
-  .check input { width: 16px; height: 16px; margin-top: 3px; accent-color: var(--board); cursor: pointer; flex: none; }
+  .check input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--board); cursor: pointer; flex: none; }
   .check span { font-size: 0.94rem; }
-  .check small { display: block; color: var(--ink-soft); }
+  .check small { display: block; color: var(--ink-soft); margin-top: 1px; }
 
-  /* ---------- step tabs (Create flow) ---------- */
-  .steps {
-    display: flex; gap: 0;
-    border-bottom: 1.5px solid var(--line);
-    margin-bottom: 24px;
-    overflow: hidden;
+  /* ---------- create flow: split workspace ---------- */
+  .create-split { display: flex; min-height: 100vh; align-items: stretch; }
+  .create-source {
+    flex: 0 0 58%; max-width: 58%;
+    background: var(--empty-bg); border-right: 1px solid var(--line);
+    padding: 36px 44px; display: flex; flex-direction: column;
   }
-  .step {
-    display: flex; align-items: center; gap: 10px;
-    padding: 12px 20px 13px; margin-bottom: -1.5px;
-    border-bottom: 2.5px solid transparent;
-    color: var(--ink-soft); font-weight: 500; font-size: 0.93rem;
-    background: none; border-top: 0; border-left: 0; border-right: 0;
-    cursor: pointer; font-family: var(--font-body);
-    transition: color var(--transition), border-color var(--transition);
+  .create-aside {
+    flex: 1; background: var(--paper);
+    padding: 36px 38px; display: flex; flex-direction: column;
   }
-  .step .step-n {
-    width: 24px; height: 24px; border-radius: 50%; flex: none;
-    border: 2px solid currentColor;
+  .source-textarea {
+    flex: 1; min-height: 360px; width: 100%; resize: none;
+    border: 0; outline: none; background: transparent; box-shadow: none;
+    font-family: var(--font-body); font-size: 1rem; line-height: 1.7; padding: 6px 0;
+    color: var(--ink);
+  }
+  .source-textarea:focus { box-shadow: none; }
+
+  /* vertical step tracker */
+  .vsteps { position: relative; }
+  .vsteps::before {
+    content: ""; position: absolute; left: 17px; top: 18px; bottom: 18px;
+    width: 2px; background: var(--line-strong);
+  }
+  .vstep { position: relative; display: flex; gap: 14px; padding-bottom: 22px; }
+  .vstep:last-child { padding-bottom: 0; }
+  .vstep-n {
+    width: 36px; height: 36px; flex: none; border-radius: 50%; z-index: 1;
     display: inline-flex; align-items: center; justify-content: center;
-    font-size: 0.78rem; font-weight: 700;
-    transition: background var(--transition), border-color var(--transition), transform 0.2s ease;
+    font-weight: 700; font-size: 0.9rem;
+    background: var(--paper); border: 2px solid var(--line-strong); color: var(--ink-soft);
+    transition: background var(--transition), border-color var(--transition), color var(--transition);
   }
-  .step.active { color: var(--board-deep); border-bottom-color: var(--board); font-weight: 600; }
-  .step.done { color: var(--board); }
-  .step.done .step-n {
-    background: var(--board); border-color: var(--board); color: #fff;
-    animation: step-complete 0.3s ease;
+  .vstep.active .vstep-n { background: var(--board); border-color: var(--board); color: #fff; box-shadow: 0 0 0 4px var(--board-tint); }
+  html[data-theme="dark"] .vstep.active .vstep-n { color: #0d1512; }
+  .vstep.done .vstep-n { background: var(--board); border-color: var(--board); color: #fff; animation: step-complete 0.3s ease; }
+  .vstep-title { font-family: var(--font-body); font-weight: 600; font-size: 0.98rem; color: var(--ink-soft); }
+  .vstep.active .vstep-title { font-family: var(--font-display); font-weight: 700; color: var(--board-deep); font-size: 1rem; }
+  .vstep-desc { color: var(--ink-soft); font-size: 0.84rem; margin-top: 2px; }
+
+  .tip {
+    display: flex; gap: 11px; padding: 14px 15px; border-radius: var(--radius);
+    background: var(--board-tint); color: var(--board-deep); font-size: 0.86rem; line-height: 1.5;
   }
-  .step:disabled { cursor: default; opacity: 0.5; }
+  .tip svg { flex: none; margin-top: 1px; }
 
   /* ---------- choice cards ---------- */
-  .choice-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
+  .choice-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 10px; }
   .choice {
     border: 1.5px solid var(--line-strong); border-radius: var(--radius); background: var(--field-bg);
     padding: 14px 15px; cursor: pointer; text-align: left; font: inherit; font-family: var(--font-body);
-    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition), transform 0.15s ease;
+    transition: border-color var(--transition), background var(--transition), transform var(--transition-fast);
   }
-  .choice:hover { border-color: var(--board); box-shadow: 0 2px 10px var(--board-glow); transform: translateY(-1px); }
-  .choice.selected { border-color: var(--board); background: var(--board-tint); box-shadow: 0 2px 10px var(--board-glow); }
+  .choice:hover { border-color: var(--board); transform: translateY(-1px); }
+  .choice.selected { border-color: var(--board); background: var(--board-tint); }
   .choice b { display: block; font-size: 0.93rem; font-weight: 600; }
   .choice small { color: var(--ink-soft); font-size: 0.79rem; line-height: 1.35; display: block; margin-top: 4px; }
 
-  /* ---------- tabs (source input) ---------- */
+  /* ---------- segmented tabs (source input) ---------- */
   .tabs {
     display: inline-flex; background: var(--tab-track);
     border-radius: var(--radius-sm); padding: 3px; gap: 2px; margin-bottom: 16px;
   }
   .tab {
     border: 0; background: none; font: inherit; font-family: var(--font-body);
-    font-weight: 600; font-size: 0.88rem;
+    font-weight: 600; font-size: 0.87rem;
     padding: 7px 16px; border-radius: 6px; cursor: pointer; color: var(--ink-soft);
-    transition: background var(--transition), color var(--transition), box-shadow var(--transition);
-  }
-  .tab.active {
-    background: var(--panel); color: var(--ink);
-    box-shadow: var(--shadow-sm);
+    transition: background var(--transition), color var(--transition);
   }
+  .tab.active { background: var(--panel); color: var(--ink); box-shadow: var(--shadow-sm); }
 
   /* ---------- badges & chips ---------- */
   .chip {
     display: inline-flex; align-items: center; gap: 5px;
-    font-size: 0.73rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
-    padding: 3px 10px; border-radius: 99px;
+    font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
+    padding: 3px 9px; border-radius: 6px; flex: none;
     background: var(--board-tint); color: var(--board-deep);
   }
+  .chip-pill { border-radius: 99px; }
   .chip-neutral { background: var(--chip-neutral-bg); color: var(--ink-soft); }
+  .chip-gold { background: var(--gold-tint); color: var(--gold-ink); }
+  .chip-red { background: var(--redpen-tint); color: var(--redpen); }
 
   .stamp {
-    display: inline-flex; align-items: center; gap: 5px;
-    font-family: var(--font-mono); font-size: 0.71rem; font-weight: 700;
-    letter-spacing: 0.08em; text-transform: uppercase;
+    display: inline-flex; align-items: center; gap: 4px;
+    font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700;
+    letter-spacing: 0.07em; text-transform: uppercase;
     padding: 3px 8px; border: 1.5px solid currentColor; border-radius: 4px;
-    transform: rotate(-1.2deg);
+    transform: rotate(-1.2deg); flex: none;
   }
-  .stamp-pass { color: var(--board); background: rgba(47, 107, 88, 0.06); }
+  .stamp-pass { color: var(--board); background: rgba(47, 107, 88, 0.07); }
   .stamp-warn { color: var(--gold); background: var(--gold-tint); transform: rotate(1deg); }
 
   /* ---------- answer key (red pen) ---------- */
   .answer-key {
-    margin-top: 14px; padding: 13px 15px;
+    padding: 13px 15px;
     background: var(--redpen-tint);
     border-left: 3px solid var(--redpen);
     border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
   }
+  .answer-key + .answer-key { margin-top: 10px; }
   .answer-key .ak-label {
-    font-family: var(--font-mono); font-size: 0.69rem; font-weight: 700;
+    font-family: var(--font-mono); font-size: 0.67rem; font-weight: 700;
     letter-spacing: 0.1em; text-transform: uppercase; color: var(--redpen);
-    display: block; margin-bottom: 6px;
+    display: block; margin-bottom: 7px;
   }
-  .answer-key, .answer-key textarea, .answer-key input { font-size: 0.92rem; }
+  .answer-key textarea, .answer-key input[type="text"] { background: var(--field-bg); font-size: 0.9rem; }
   .redpen { color: var(--redpen); font-weight: 600; }
 
-  /* ---------- question cards ---------- */
-  .qcard { position: relative; }
-  .qcard-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
-  .qnum { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; color: var(--board-deep); min-width: 28px; }
-  .qcard-actions { margin-left: auto; display: flex; gap: 6px; flex-wrap: wrap; }
-  .icon-btn {
-    border: 1px solid var(--line); background: var(--field-bg); border-radius: 7px;
-    width: 32px; height: 32px; cursor: pointer; font-size: 0.93rem; line-height: 1;
-    display: inline-flex; align-items: center; justify-content: center; color: var(--ink-soft);
-    transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition-fast);
+  /* ---------- editor: continuous document ---------- */
+  .doc { overflow: hidden; }      /* a .panel that holds the question rows */
+  .qrow {
+    display: grid;
+    grid-template-columns: 44px minmax(0, 1fr) minmax(300px, 360px);
+    gap: 22px;
+    padding: 24px 26px;
   }
-  .icon-btn:hover { border-color: var(--board); color: var(--ink); background: var(--board-tint); transform: scale(1.05); }
-  .icon-btn:disabled { opacity: 0.3; cursor: default; transform: none; }
-  .icon-btn.danger:hover { border-color: var(--redpen); color: var(--redpen); background: var(--redpen-tint); }
+  .qrow + .qrow { border-top: 1px solid var(--line); }
+  .qrow.dragging { opacity: 0.4; }
+  .qrow.drag-over { background: var(--board-tint); }
+  .qrail { display: flex; flex-direction: column; align-items: center; gap: 8px; padding-top: 2px; }
+  .qgrip {
+    color: var(--ink-faint); cursor: grab; display: inline-flex;
+    border: 0; background: none; padding: 2px; border-radius: 4px;
+    transition: color var(--transition), background var(--transition);
+  }
+  .qgrip:hover { color: var(--board); background: var(--hover-bg); }
+  .qgrip:active { cursor: grabbing; }
+  .qnum { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; color: var(--board-deep); }
+
+  /* editable assignment title — clear affordance */
+  .title-edit { position: relative; display: flex; align-items: center; gap: 8px; margin-left: -8px; }
+  .title-edit input {
+    font-family: var(--font-display); font-size: 1.75rem; font-weight: 700; color: var(--ink);
+    border: 1.5px solid transparent; background: transparent; padding: 4px 8px;
+    border-radius: var(--radius-sm); width: 100%; border-bottom: 1.5px dashed var(--line-strong);
+    transition: background var(--transition), border-color var(--transition);
+  }
+  .title-edit input:hover { background: var(--hover-bg); }
+  .title-edit input:focus { outline: none; background: var(--field-bg); border-color: var(--board); border-bottom-style: solid; box-shadow: 0 0 0 3px var(--board-glow); }
+  .title-edit .pen { color: var(--ink-faint); flex: none; opacity: 0; transition: opacity var(--transition); pointer-events: none; }
+  .title-edit:hover .pen { opacity: 1; }
+  .qmain { min-width: 0; }
+  .qmargin { min-width: 0; }
+  .qcard-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
+  .qcard-actions { margin-left: auto; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
+  .q-prompt { font-size: 1.02rem; }
 
   .opt-row { display: flex; align-items: center; gap: 9px; margin: 7px 0; }
-  .opt-row input[type="radio"] { accent-color: var(--redpen); width: 16px; height: 16px; flex: none; cursor: pointer; }
-  .opt-letter { font-weight: 700; font-size: 0.84rem; color: var(--ink-soft); width: 18px; flex: none; }
-  .points-input { width: 64px !important; text-align: center; }
+  .opt-row input[type="radio"] { accent-color: var(--redpen); width: 17px; height: 17px; flex: none; cursor: pointer; }
+  .opt-letter { font-weight: 700; font-size: 0.82rem; color: var(--ink-soft); width: 18px; flex: none; }
+  .points-input { width: 56px !important; text-align: center; padding: 6px 4px !important; }
 
-  /* ---------- alerts & toasts ---------- */
+  @media (max-width: 1180px) {
+    .qrow { grid-template-columns: 44px minmax(0, 1fr); }
+    .qmargin { grid-column: 1 / -1; padding-left: 22px; }
+  }
+
+  /* ---------- alerts & toasts (tokenized) ---------- */
   .alert {
     padding: 13px 16px; border-radius: var(--radius-sm); font-size: 0.92rem;
-    margin: 14px 0; border: 1px solid;
+    margin: 14px 0; border: 1px solid; display: flex; gap: 9px; align-items: flex-start;
     animation: fade-in 0.2s ease;
   }
-  .alert-error { background: var(--redpen-tint); border-color: #e8c5be; color: #8c3022; }
-  .alert-warn { background: var(--gold-tint); border-color: #e9d8a6; color: #7a5a14; }
-  .alert-info { background: var(--board-tint); border-color: #cde0d8; color: var(--board-deep); }
+  .alert svg { flex: none; margin-top: 1px; }
+  .alert-error { background: var(--alert-error-bg); border-color: var(--alert-error-border); color: var(--alert-error-ink); }
+  .alert-warn { background: var(--alert-warn-bg); border-color: var(--alert-warn-border); color: var(--alert-warn-ink); }
+  .alert-info { background: var(--alert-info-bg); border-color: var(--alert-info-border); color: var(--alert-info-ink); }
 
   .toast {
     position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
-    background: var(--ink); color: #fff;
-    padding: 11px 22px; border-radius: 99px;
-    font-size: 0.91rem; font-weight: 600;
-    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
-    z-index: 100;
+    background: var(--ink); color: var(--panel);
+    padding: 11px 22px; border-radius: 99px; font-size: 0.91rem; font-weight: 600;
+    box-shadow: var(--shadow-modal); z-index: 100;
     animation: slide-up 0.22s cubic-bezier(0.34, 1.56, 0.64, 1) both;
     white-space: nowrap;
   }
@@ -451,10 +583,8 @@
   /* ---------- spinner ---------- */
   .spinner {
     width: 16px; height: 16px; border-radius: 50%; flex: none;
-    border: 2px solid rgba(47, 107, 88, 0.22);
-    border-top-color: var(--board);
-    animation: spin 0.7s linear infinite;
-    display: inline-block; vertical-align: -3px;
+    border: 2px solid var(--board-glow); border-top-color: var(--board);
+    animation: spin 0.7s linear infinite; display: inline-block; vertical-align: -3px;
   }
 
   /* ---------- generation progress ---------- */
@@ -463,75 +593,150 @@
     display: flex; align-items: center; gap: 12px;
     padding: 11px 0; font-size: 0.97rem; color: var(--ink-soft);
     border-bottom: 1px solid var(--line);
-    opacity: 0;
-    animation: fade-in-up 0.35s ease forwards;
   }
   .progress-list li:last-child { border-bottom: none; }
-  .progress-list li:nth-child(1) { animation-delay: 0.0s; }
-  .progress-list li:nth-child(2) { animation-delay: 0.08s; }
-  .progress-list li:nth-child(3) { animation-delay: 0.16s; }
-  .progress-list li:nth-child(4) { animation-delay: 0.24s; }
   .progress-list li.active { color: var(--ink); font-weight: 600; }
   .progress-list li.done { color: var(--board); }
-  .progress-dot { width: 20px; text-align: center; flex: none; font-size: 1rem; }
+  .progress-dot { width: 20px; text-align: center; flex: none; }
 
-  /* ---------- library ---------- */
-  .lib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(276px, 1fr)); gap: 16px; }
-  .lib-card { animation: fade-in-up 0.35s ease both; }
-  .lib-card:nth-child(2) { animation-delay: 0.06s; }
-  .lib-card:nth-child(3) { animation-delay: 0.12s; }
-  .lib-card:nth-child(4) { animation-delay: 0.18s; }
-  .lib-card:nth-child(5) { animation-delay: 0.24s; }
-  .lib-card:nth-child(6) { animation-delay: 0.30s; }
-  .lib-card h3 { margin-bottom: 6px; }
-  .lib-meta { color: var(--ink-soft); font-size: 0.83rem; margin: 3px 0 14px; line-height: 1.55; }
-  .lib-actions { display: flex; gap: 7px; }
-
-  /* Skeleton loader */
-  .skeleton-card { animation: skeleton-pulse 1.5s ease-in-out infinite; }
-  .skeleton-line {
-    background: var(--line); border-radius: 5px; height: 14px; margin-bottom: 10px;
+  /* ---------- library: search + filters ---------- */
+  .lib-toolbar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
+  .search-wrap { position: relative; flex: 1; max-width: 480px; min-width: 240px; }
+  .search-wrap svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--ink-soft); }
+  .search-wrap input { padding-left: 38px; }
+  .fchip {
+    font-size: 0.79rem; font-weight: 600; padding: 7px 14px; border-radius: 99px; cursor: pointer;
+    border: 1.5px solid var(--line-strong); background: var(--panel); color: var(--ink-soft);
+    transition: border-color var(--transition), color var(--transition), background var(--transition);
   }
+  .fchip:hover { border-color: var(--board); color: var(--board-deep); }
+  .fchip.active { border-color: var(--board); background: var(--board-tint); color: var(--board-deep); }
+
+  /* grouped library lists */
+  .lib-group { margin-bottom: 32px; }
+  .lib-group-head {
+    display: flex; align-items: center; gap: 11px;
+    padding-bottom: 10px; margin-bottom: 14px; border-bottom: 1px solid var(--line);
+  }
+  .lib-group-head h2 { font-size: 1.3rem; }
+  .lib-rows { overflow: hidden; }   /* a .panel */
+  .lib-row { display: flex; align-items: center; gap: 16px; padding: 15px 18px; transition: background var(--transition); }
+  .lib-row + .lib-row { border-top: 1px solid var(--line); }
+  .lib-row:hover { background: var(--hover-bg); }
+  .lib-row-title { font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; color: var(--ink); cursor: pointer; }
+  .lib-row-title:hover { color: var(--board-deep); text-decoration: underline; text-underline-offset: 2px; }
+  .lib-meta { color: var(--ink-soft); font-size: 0.83rem; margin: 3px 0 0; }
+  .lib-actions { display: flex; align-items: center; gap: 8px; flex: none; }
+
+  /* skeletons */
+  .skeleton-card { animation: skeleton-pulse 1.5s ease-in-out infinite; }
+  .skeleton-line { background: var(--line); border-radius: 5px; height: 14px; margin-bottom: 10px; }
   .skeleton-line.short { width: 55%; }
   .skeleton-line.medium { width: 75%; }
   .skeleton-line.full { width: 100%; }
-  .skeleton-chip { background: var(--line); border-radius: 99px; height: 20px; width: 64px; margin-bottom: 12px; }
+  .skeleton-chip { background: var(--line); border-radius: 6px; height: 20px; width: 56px; margin-bottom: 12px; }
 
   .empty {
-    text-align: center; padding: 60px 24px; color: var(--ink-soft);
+    text-align: center; padding: 64px 24px; color: var(--ink-soft);
     border: 1.5px dashed var(--line-strong); border-radius: var(--radius);
     background: var(--empty-bg);
-    animation: fade-in 0.3s ease;
   }
   .empty h3 { color: var(--ink); margin-bottom: 8px; }
 
-  /* ---------- provider cards on settings ---------- */
-  .provider-row {
-    display: flex; align-items: center; gap: 12px;
-    padding: 13px 15px; border: 1.5px solid var(--line-strong);
-    border-radius: var(--radius); cursor: pointer; background: var(--field-bg);
-    margin-bottom: 10px;
-    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
+  /* ---------- settings: flush two-column ---------- */
+  .settings-grid { display: flex; gap: 48px; align-items: flex-start; }
+  .settings-toc {
+    width: 210px; flex: none; position: sticky; top: 36px;
+    display: flex; flex-direction: column; gap: 1px;
   }
-  .provider-row:hover { border-color: var(--board); background: var(--hover-bg); }
-  .provider-row.selected { border-color: var(--board); background: var(--board-tint); box-shadow: 0 2px 8px var(--board-glow); }
-  .provider-row input { accent-color: var(--board); width: 17px; height: 17px; flex: none; }
-  .provider-row b { font-size: 0.96rem; }
+  .toc-link {
+    display: flex; align-items: center; gap: 9px; padding: 8px 12px;
+    border-left: 2px solid transparent; color: var(--ink-soft);
+    font-size: 0.87rem; font-weight: 500; cursor: pointer; text-decoration: none;
+    transition: color var(--transition), background var(--transition);
+  }
+  .toc-link:hover { color: var(--ink); background: var(--hover-bg); text-decoration: none; }
+  .toc-link.active { color: var(--board-deep); border-left-color: var(--board); font-weight: 600; }
+  .settings-body { flex: 1; min-width: 0; }
+  .sec { padding: 34px 0; border-top: 1px solid var(--line); }
+  .sec:first-child { border-top: 0; padding-top: 4px; }
+  .sec > h2 { margin-bottom: 6px; }
+  .sec-hint { color: var(--ink-soft); font-size: 0.9rem; margin: 0 0 20px; max-width: 70ch; }
+
+  /* provider list — flat rows, not nested cards */
+  .provider-list { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
+  .provider-row {
+    display: flex; align-items: center; gap: 13px; padding: 14px 16px;
+    cursor: pointer; background: var(--panel); border-left: 3px solid transparent;
+    transition: background var(--transition);
+  }
+  .provider-row + .provider-row { border-top: 1px solid var(--line); }
+  .provider-row:hover { background: var(--hover-bg); }
+  .provider-row.selected { background: var(--board-tint); border-left-color: var(--board); }
+  .provider-row input { accent-color: var(--board); width: 18px; height: 18px; flex: none; }
+  .provider-row b { font-size: 0.95rem; }
+  .provider-row .selected & b { color: var(--board-deep); }
   .provider-row small { color: var(--ink-soft); display: block; }
   .local-tag { margin-left: auto; }
 
+  /* slider */
+  input[type="range"] { accent-color: var(--board); }
+
+  /* ---------- modal ---------- */
+  .modal-scrim {
+    position: fixed; inset: 0; z-index: 100; background: rgba(20, 30, 26, 0.5);
+    display: flex; align-items: flex-start; justify-content: center;
+    padding: 40px 16px; overflow-y: auto; animation: fade-in 0.15s ease;
+  }
+  .modal {
+    background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
+    box-shadow: var(--shadow-modal); animation: fade-in-up 0.18s ease both;
+  }
+
   /* ---------- misc helpers ---------- */
+  .sr-only {
+    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
+    overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
+  }
   .muted { color: var(--ink-soft); }
+  .faint { color: var(--ink-faint); }
   .small { font-size: 0.84rem; }
   .spacer { flex: 1; }
   .hr { border: 0; border-top: 1px solid var(--line); margin: 20px 0; }
+  code { font-family: var(--font-mono); font-size: 0.88em; background: var(--chip-neutral-bg); padding: 1px 5px; border-radius: 4px; }
 
-  @media (max-width: 640px) {
-    .shell { padding: 20px 15px 74px; }
-    .topnav-inner { gap: 10px; padding: 0 15px; }
-    .brand span.brand-text { display: none; }
-    .card { padding: 18px; }
-    .steps { overflow-x: auto; }
-    h1 { font-size: 1.5rem; }
+  /* =====================================================================
+     RESPONSIVE — collapse the sidebar into a top bar on small screens
+     ===================================================================== */
+  @media (max-width: 880px) {
+    .app { flex-direction: column; }
+    .sidebar {
+      width: 100%; height: auto; position: sticky; top: 0;
+      flex-direction: row; align-items: center; gap: 6px;
+      border-right: 0; border-bottom: 1px solid var(--line);
+      padding: 0 12px;
+    }
+    .sidebar-brand { padding: 12px 6px; }
+    .brand-sub { display: none; }
+    .sidebar-nav { flex-direction: row; padding: 0; margin-left: 8px; }
+    .navrow { height: 44px; }
+    .navrow span.navrow-label { display: none; }
+    .sidebar-scroll { display: none; }   /* tree hidden on mobile; Library page covers it */
+    .sidebar-foot { margin-left: auto; border-top: 0; padding: 8px 0; }
+    .sidebar-foot .btn-block { width: auto; }
+    .page { padding: 24px 18px 80px; }
+    .create-split { flex-direction: column; min-height: 0; }
+    .create-source, .create-aside { flex: 1 1 auto; max-width: 100%; border-right: 0; }
+    .create-source { border-bottom: 1px solid var(--line); }
+    .settings-grid { flex-direction: column; gap: 18px; }
+    .settings-toc { position: static; flex-direction: row; flex-wrap: wrap; width: 100%; gap: 4px; }
+    .toc-link { border-left: 0; border-bottom: 2px solid transparent; }
+    .toc-link.active { border-left: 0; border-bottom-color: var(--board); }
+  }
+
+  @media (max-width: 560px) {
+    .page { padding: 20px 14px 72px; }
+    .qrow { padding: 18px 14px; gap: 14px; }
+    h1 { font-size: 1.6rem; }
   }
 }
diff --git a/app/layout.jsx b/app/layout.jsx
index 0ee22cd..06f0e7f 100644
--- a/app/layout.jsx
+++ b/app/layout.jsx
@@ -1,5 +1,5 @@
 import "./globals.css";
-import Nav from "@/components/Nav";
+import Sidebar from "@/components/Sidebar";
 
 export const metadata = {
   title: "Mr. Drew's Assignment Creator",
@@ -19,8 +19,10 @@ export default function RootLayout({ children }) {
         <link rel="preconnect" href="https://fonts.gstatic.com" crossOrigin="anonymous" />
       </head>
       <body>
-        <Nav />
-        <main className="shell">{children}</main>
+        <div className="app">
+          <Sidebar />
+          <main className="content">{children}</main>
+        </div>
       </body>
     </html>
   );
diff --git a/app/library/page.jsx b/app/library/page.jsx
index 11de80e..a3c7802 100644
--- a/app/library/page.jsx
+++ b/app/library/page.jsx
@@ -1,29 +1,38 @@
 "use client";
-// app/library/page.jsx — everything you've made, saved locally in data/db.json.
-import { useEffect, useState } from "react";
+// app/library/page.jsx — everything you've made, grouped by subject, saved locally.
+import { useEffect, useMemo, useState } from "react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";
+import { IconSearch, IconPlus, IconCopy, IconTrash, IconArrowRight } from "@tabler/icons-react";
+import { groupBySubject } from "@/lib/group";
 
 const TYPE_LABELS = {
-  quiz: "Quiz",
-  test: "Test",
-  worksheet: "Worksheet",
-  discussion: "Discussion",
-  case_study: "Case study",
+  quiz: "Quiz", test: "Test", worksheet: "Worksheet", discussion: "Discussion", case_study: "Case study",
 };
+const TYPE_CHIP = {
+  quiz: "chip", test: "chip chip-red", worksheet: "chip chip-gold", discussion: "chip chip-neutral", case_study: "chip chip-neutral",
+};
+const FILTERS = [
+  { id: "all", label: "All" },
+  { id: "quiz", label: "Quizzes" },
+  { id: "test", label: "Tests" },
+  { id: "worksheet", label: "Worksheets" },
+];
 
-function SkeletonCard() {
+function SkeletonGroup() {
   return (
-    <div className="card skeleton-card" aria-hidden="true">
-      <div className="skeleton-chip" />
-      <div className="skeleton-line medium" />
-      <div className="skeleton-line short" style={{ marginBottom: 18 }} />
-      <div className="skeleton-line full" />
-      <div className="skeleton-line" style={{ width: "40%", marginBottom: 16 }} />
-      <div style={{ display: "flex", gap: 7 }}>
-        <div className="skeleton-line" style={{ width: 64, height: 30, borderRadius: 7, marginBottom: 0 }} />
-        <div className="skeleton-line" style={{ width: 80, height: 30, borderRadius: 7, marginBottom: 0 }} />
-        <div className="skeleton-line" style={{ width: 64, height: 30, borderRadius: 7, marginBottom: 0 }} />
+    <div className="lib-group">
+      <div className="skeleton-line short" style={{ height: 22, marginBottom: 14 }} />
+      <div className="panel lib-rows skeleton-card">
+        {[0, 1].map((i) => (
+          <div key={i} className="lib-row" style={{ borderTop: i ? "1px solid var(--line)" : "none" }}>
+            <div className="skeleton-chip" style={{ marginBottom: 0 }} />
+            <div style={{ flex: 1 }}>
+              <div className="skeleton-line medium" style={{ marginBottom: 6 }} />
+              <div className="skeleton-line short" style={{ marginBottom: 0 }} />
+            </div>
+          </div>
+        ))}
       </div>
     </div>
   );
@@ -33,6 +42,7 @@ export default function LibraryPage() {
   const router = useRouter();
   const [items, setItems] = useState(null);
   const [query, setQuery] = useState("");
+  const [filter, setFilter] = useState("all");
   const [error, setError] = useState("");
   const [busy, setBusy] = useState("");
 
@@ -45,70 +55,53 @@ export default function LibraryPage() {
   useEffect(load, []);
 
   async function duplicate(id) {
-    setBusy(id);
-    setError("");
+    setBusy(id); setError("");
     try {
       const res = await fetch("/api/assignments/" + id);
       const full = await res.json();
       if (!res.ok) throw new Error(full.error || "Could not load that assignment.");
       const { id: _id, createdAt, updatedAt, ...copy } = full;
       copy.title = (copy.title || "Untitled") + " (copy)";
-      const res2 = await fetch("/api/assignments", {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify(copy),
-      });
+      const res2 = await fetch("/api/assignments", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(copy) });
       const created = await res2.json();
       if (!res2.ok) throw new Error(created.error || "Could not duplicate.");
       load();
-    } catch (e) {
-      setError(String(e.message || e));
-    } finally {
-      setBusy("");
-    }
+    } catch (e) { setError(String(e.message || e)); }
+    finally { setBusy(""); }
   }
 
   async function remove(id, title) {
     if (!confirm(`Delete "${title}"? This can't be undone.`)) return;
     setBusy(id);
-    try {
-      await fetch("/api/assignments/" + id, { method: "DELETE" });
-      load();
-    } finally {
-      setBusy("");
-    }
+    try { await fetch("/api/assignments/" + id, { method: "DELETE" }); load(); }
+    finally { setBusy(""); }
   }
 
-  const filtered = (items || []).filter((a) => {
+  const filtered = useMemo(() => {
     const q = query.trim().toLowerCase();
-    if (!q) return true;
-    return [a.title, a.subject, a.gradeLevel, TYPE_LABELS[a.assignmentType]]
-      .filter(Boolean)
-      .join(" ")
-      .toLowerCase()
-      .includes(q);
-  });
+    return (items || []).filter((a) => {
+      if (filter !== "all" && a.assignmentType !== filter) return false;
+      if (!q) return true;
+      return [a.title, a.subject, a.gradeLevel, TYPE_LABELS[a.assignmentType]]
+        .filter(Boolean).join(" ").toLowerCase().includes(q);
+    });
+  }, [items, query, filter]);
+
+  const groups = useMemo(() => groupBySubject(filtered), [filtered]);
 
   return (
-    <div>
-      <div className="page-head" style={{ display: "flex", alignItems: "center", gap: 14, flexWrap: "wrap" }}>
+    <div className="page page-narrow">
+      <div className="page-head" style={{ display: "flex", alignItems: "flex-start", gap: 14, flexWrap: "wrap", marginBottom: 22 }}>
         <div style={{ flex: 1 }}>
           <h1>Library</h1>
           <p>Everything you&rsquo;ve created, stored locally on this computer.</p>
         </div>
-        <Link href="/" className="btn btn-primary">✎ New assignment</Link>
+        <Link href="/" className="btn btn-primary"><IconPlus size={17} /> New assignment</Link>
       </div>
 
       {error && <div className="alert alert-error">{error}</div>}
 
-      {/* Skeleton loading state */}
-      {items === null && (
-        <div className="lib-grid">
-          <SkeletonCard />
-          <SkeletonCard />
-          <SkeletonCard />
-        </div>
-      )}
+      {items === null && (<><SkeletonGroup /><SkeletonGroup /></>)}
 
       {items !== null && items.length === 0 && (
         <div className="empty">
@@ -120,36 +113,50 @@ export default function LibraryPage() {
 
       {items !== null && items.length > 0 && (
         <>
-          <input
-            type="text"
-            placeholder="Search by title, subject, grade, or type…"
-            value={query}
-            onChange={(e) => setQuery(e.target.value)}
-            style={{ marginBottom: 18, maxWidth: 440 }}
-            aria-label="Search library"
-          />
-          {filtered.length === 0 && <p className="muted">No matches for &ldquo;{query}&rdquo;.</p>}
-          <div className="lib-grid">
-            {filtered.map((a) => (
-              <div key={a.id} className="card lib-card card-lift">
-                <span className="chip">{TYPE_LABELS[a.assignmentType] || a.assignmentType}</span>
-                <h3 style={{ marginTop: 10 }}>
-                  <Link href={"/editor/" + a.id} style={{ color: "inherit" }}>{a.title}</Link>
-                </h3>
-                <p className="lib-meta">
-                  {[a.gradeLevel, a.subject].filter(Boolean).join(" · ")}<br />
-                  {a.questionCount} question{a.questionCount === 1 ? "" : "s"} · {a.totalPoints} pts · updated {formatDate(a.updatedAt)}
-                </p>
-                <div className="lib-actions">
-                  <button className="btn btn-sm btn-primary" onClick={() => router.push("/editor/" + a.id)}>Open</button>
-                  <button className="btn btn-sm" disabled={busy === a.id} onClick={() => duplicate(a.id)}>
-                    {busy === a.id ? <span className="spinner" /> : "Duplicate"}
-                  </button>
-                  <button className="btn btn-sm btn-danger" disabled={busy === a.id} onClick={() => remove(a.id, a.title)}>Delete</button>
-                </div>
-              </div>
-            ))}
+          <div className="lib-toolbar">
+            <div className="search-wrap">
+              <IconSearch size={16} />
+              <input type="text" placeholder="Search by title, subject, grade, or type…" value={query} onChange={(e) => setQuery(e.target.value)} aria-label="Search library" />
+            </div>
+            <div style={{ display: "flex", gap: 7, flexWrap: "wrap" }}>
+              {FILTERS.map((f) => (
+                <button key={f.id} className={`fchip${filter === f.id ? " active" : ""}`} onClick={() => setFilter(f.id)}>{f.label}</button>
+              ))}
+            </div>
           </div>
+
+          {groups.length === 0 && <p className="muted">No matches{query ? <> for &ldquo;{query}&rdquo;</> : ""}.</p>}
+
+          {groups.map((g) => (
+            <section key={g.key} className="lib-group">
+              <div className="lib-group-head">
+                <h2>{g.key}</h2>
+                <span className="chip chip-pill chip-neutral">{g.items.length}</span>
+              </div>
+              <div className="panel lib-rows">
+                {g.items.map((a) => (
+                  <div key={a.id} className="lib-row">
+                    <span className={TYPE_CHIP[a.assignmentType] || "chip chip-neutral"}>{TYPE_LABELS[a.assignmentType] || a.assignmentType}</span>
+                    <div style={{ flex: 1, minWidth: 0 }}>
+                      <Link href={"/editor/" + a.id} className="lib-row-title" style={{ display: "block" }}>{a.title}</Link>
+                      <p className="lib-meta">
+                        {[a.gradeLevel, a.subject].filter(Boolean).join(" · ")}
+                        {(a.gradeLevel || a.subject) ? " · " : ""}
+                        {a.questionCount} question{a.questionCount === 1 ? "" : "s"} · {a.totalPoints} pts · updated {formatDate(a.updatedAt)}
+                      </p>
+                    </div>
+                    <div className="lib-actions">
+                      <button className="btn btn-sm btn-primary" onClick={() => router.push("/editor/" + a.id)}><IconArrowRight size={14} /> Open</button>
+                      <button className="icon-btn" title="Duplicate" aria-label="Duplicate" disabled={busy === a.id} onClick={() => duplicate(a.id)}>
+                        {busy === a.id ? <span className="spinner" /> : <IconCopy size={16} />}
+                      </button>
+                      <button className="icon-btn danger" title="Delete" aria-label="Delete" disabled={busy === a.id} onClick={() => remove(a.id, a.title)}><IconTrash size={16} /></button>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            </section>
+          ))}
         </>
       )}
     </div>
@@ -157,9 +164,6 @@ export default function LibraryPage() {
 }
 
 function formatDate(iso) {
-  try {
-    return new Date(iso).toLocaleDateString(undefined, { month: "short", day: "numeric", year: "numeric" });
-  } catch {
-    return "";
-  }
+  try { return new Date(iso).toLocaleDateString(undefined, { month: "short", day: "numeric", year: "numeric" }); }
+  catch { return ""; }
 }
diff --git a/app/page.jsx b/app/page.jsx
index 557410c..fa4d6e0 100644
--- a/app/page.jsx
+++ b/app/page.jsx
@@ -1,12 +1,20 @@
 "use client";
-// app/page.jsx — the Create flow: Source -> Configure -> Generate.
+// app/page.jsx — the Create flow as an Open Workspace split screen:
+// left pane = the current step's content, right pane = step tracker + actions.
 import { useEffect, useRef, useState } from "react";
 import { useRouter } from "next/navigation";
+import {
+  IconArrowRight, IconArrowLeft, IconBulb, IconPencil, IconAlertTriangle,
+  IconCircleCheck, IconCircle, IconX,
+} from "@tabler/icons-react";
 import { ASSIGNMENT_TYPES, QUESTION_TYPES, GRADE_LEVELS, DIFFICULTIES } from "@/lib/schema";
 
 const MAX_PASTE = 120000;
-
-// Maps a generation phase to its 0-based order index
+const STEPS = [
+  { label: "Source", desc: "Add your reading material" },
+  { label: "Configure", desc: "Set type, grade, questions" },
+  { label: "Generate", desc: "Review the verified key" },
+];
 const PHASE_ORDER = ["analyze", "generate", "verify", "save"];
 
 function ProgressStep({ phase, label, currentPhase, hasVerify }) {
@@ -15,9 +23,9 @@ function ProgressStep({ phase, label, currentPhase, hasVerify }) {
   const me = PHASE_ORDER.indexOf(phase);
   const state = me < cur ? "done" : me === cur ? "active" : "";
   return (
-    <li className={state} style={{ animationDelay: `${me * 0.08}s` }}>
+    <li className={state}>
       <span className="progress-dot">
-        {state === "done" ? "✓" : state === "active" ? <span className="spinner" /> : "·"}
+        {state === "done" ? <IconCircleCheck size={18} /> : state === "active" ? <span className="spinner" /> : <IconCircle size={16} />}
       </span>
       {label}{state === "active" ? "…" : ""}
     </li>
@@ -58,13 +66,9 @@ export default function CreatePage() {
       .then((r) => r.json())
       .then((s) => {
         const cfg = s.providers?.[s.provider] || {};
-        if (!cfg.model) {
-          setProviderNote({ provider: s.provider, missing: "model" });
-        } else if (["openai", "anthropic", "google"].includes(s.provider) && !cfg.apiKey) {
-          setProviderNote({ provider: s.provider, missing: "key" });
-        } else {
-          setProviderNote(null);
-        }
+        if (!cfg.model) setProviderNote({ provider: s.provider, missing: "model" });
+        else if (["openai", "anthropic", "google"].includes(s.provider) && !cfg.apiKey) setProviderNote({ provider: s.provider, missing: "key" });
+        else setProviderNote(null);
         setConfig((c) => ({ ...c, verify: s.generation?.verification !== false }));
       })
       .catch(() => {});
@@ -74,9 +78,7 @@ export default function CreatePage() {
   const [genState, setGenState] = useState(null);
   const generating = !!genState && !genState.error;
 
-  function update(patch) {
-    setConfig((c) => ({ ...c, ...patch }));
-  }
+  function update(patch) { setConfig((c) => ({ ...c, ...patch })); }
 
   function toggleQType(id) {
     setConfig((c) => {
@@ -99,9 +101,7 @@ export default function CreatePage() {
       setText(content.slice(0, MAX_PASTE));
       setSourceName(file.name);
       setSourceTab("upload");
-    } catch {
-      setError("Could not read that file.");
-    }
+    } catch { setError("Could not read that file."); }
   }
 
   async function fetchUrl() {
@@ -117,17 +117,19 @@ export default function CreatePage() {
       if (!res.ok) throw new Error(data.error || "Could not fetch that page.");
       setText(data.text.slice(0, MAX_PASTE));
       setSourceName(data.title || url);
-    } catch (e) {
-      setError(String(e.message || e));
-    } finally {
-      setFetching(false);
-    }
+    } catch (e) { setError(String(e.message || e)); }
+    finally { setFetching(false); }
   }
 
   const sourceReady = text.trim().length >= 100;
   const configReady =
     config.subject.trim().length > 0 &&
     (["discussion", "case_study"].includes(config.assignmentType) || config.questionTypes.length > 0);
+  const isDiscussionOrCase = ["discussion", "case_study"].includes(config.assignmentType);
+
+  function canGoTo(i) {
+    return i === 0 || (i === 1 && sourceReady) || (i === 2 && sourceReady && configReady);
+  }
 
   async function generate() {
     setGenState({ phase: "analyze" });
@@ -138,9 +140,7 @@ export default function CreatePage() {
       try {
         const r1 = await postJson("/api/generate", { stage: "analyze", source, config: cfg });
         analysis = r1.analysis;
-      } catch (e) {
-        console.warn("Analysis stage failed, continuing:", e);
-      }
+      } catch (e) { console.warn("Analysis stage failed, continuing:", e); }
 
       setGenState({ phase: "generate" });
       const r2 = await postJson("/api/generate", { stage: "generate", source, analysis, config: cfg });
@@ -149,18 +149,11 @@ export default function CreatePage() {
       if (cfg.verify) {
         setGenState({ phase: "verify" });
         try {
-          const r3 = await postJson("/api/generate", {
-            stage: "verify",
-            source,
-            config: cfg,
-            questions: assignment.questions,
-          });
+          const r3 = await postJson("/api/generate", { stage: "verify", source, config: cfg, questions: assignment.questions });
           for (const q of assignment.questions) {
             if (r3.verifications[q.id]) q.verification = r3.verifications[q.id];
           }
-        } catch (e) {
-          console.warn("Verification stage failed, continuing:", e);
-        }
+        } catch (e) { console.warn("Verification stage failed, continuing:", e); }
       }
 
       setGenState({ phase: "save" });
@@ -175,297 +168,273 @@ export default function CreatePage() {
     }
   }
 
-  const isDiscussionOrCase = ["discussion", "case_study"].includes(config.assignmentType);
-
   return (
-    <div>
-      <div className="page-head">
-        <h1>Create an assignment</h1>
-        <p>Give it your source material, set the parameters, and get a classroom-ready assignment with a verified answer key — all on your own machine.</p>
-      </div>
+    <div className="create-split">
+      <h1 className="sr-only">Create an assignment</h1>
+      {/* ============ LEFT: current step content ============ */}
+      <section className="create-source">
+        {step === 0 && (
+          <>
+            <span className="field-label" style={{ color: "var(--board)", marginBottom: 8 }}>Step 1 · Source</span>
+            <h2>What should the questions come from?</h2>
+            <p className="muted" style={{ margin: "8px 0 0", fontSize: "0.95rem", maxWidth: "60ch" }}>
+              Questions are grounded strictly in this material — the AI is instructed not to add outside facts.
+            </p>
 
-      {providerNote && (
-        <div className="alert alert-warn">
-          {providerNote.missing === "key"
-            ? "Your selected AI provider needs an API key before you can generate."
-            : "No AI model is selected yet."}{" "}
-          <a href="/settings">Open Settings</a> to finish setup.
-        </div>
-      )}
-
-      <div className="steps" role="tablist">
-        {["Source", "Configure", "Generate"].map((label, i) => (
-          <button
-            key={label}
-            className={`step${step === i ? " active" : ""}${step > i ? " done" : ""}`}
-            onClick={() => {
-              if (i === 0 || (i === 1 && sourceReady) || (i === 2 && sourceReady && configReady)) setStep(i);
-            }}
-            disabled={
-              generating ||
-              (i === 1 && !sourceReady) ||
-              (i === 2 && (!sourceReady || !configReady))
-            }
-            role="tab"
-            aria-selected={step === i}
-          >
-            <span className="step-n">{step > i ? "✓" : i + 1}</span> {label}
-          </button>
-        ))}
-      </div>
-
-      {/* ============ STEP 1: SOURCE ============ */}
-      {step === 0 && (
-        <div className="card">
-          <h2>What should the questions come from?</h2>
-          <p className="muted small" style={{ margin: "6px 0 16px" }}>
-            Questions are grounded strictly in this material — the AI is instructed not to add outside facts.
-          </p>
-
-          <div className="tabs">
-            {[["paste", "Paste text"], ["upload", "Upload file"], ["url", "From a web page"]].map(([id, label]) => (
-              <button
-                key={id}
-                className={`tab${sourceTab === id ? " active" : ""}`}
-                onClick={() => { setSourceTab(id); setError(""); }}
-              >
-                {label}
-              </button>
-            ))}
-          </div>
-
-          {sourceTab === "upload" && (
-            <div style={{ marginBottom: 14 }}>
-              <input ref={fileRef} type="file" accept=".txt,.md,.markdown,.text,.csv" onChange={onFile} style={{ display: "none" }} />
-              <button className="btn" onClick={() => fileRef.current?.click()}>Choose a .txt or .md file</button>
-              {sourceName && <span className="small muted" style={{ marginLeft: 10 }}>{sourceName}</span>}
-            </div>
-          )}
-
-          {sourceTab === "url" && (
-            <div style={{ display: "flex", gap: 10, marginBottom: 14, flexWrap: "wrap" }}>
-              <input
-                type="url"
-                placeholder="https://example.com/article"
-                value={url}
-                onChange={(e) => setUrl(e.target.value)}
-                onKeyDown={(e) => { if (e.key === "Enter" && url.trim()) fetchUrl(); }}
-                style={{ flex: 1, minWidth: 240 }}
-              />
-              <button className="btn btn-primary" onClick={fetchUrl} disabled={fetching || !url.trim()}>
-                {fetching ? <><span className="spinner" /> Fetching…</> : "Fetch page"}
-              </button>
-            </div>
-          )}
-
-          <textarea
-            value={text}
-            onChange={(e) => { setText(e.target.value.slice(0, MAX_PASTE)); if (sourceTab === "paste") setSourceName(""); }}
-            placeholder={
-              sourceTab === "paste"
-                ? "Paste your reading passage, chapter, article, or lecture notes here…"
-                : "The file or page content will appear here — you can trim or edit it before generating."
-            }
-            rows={12}
-            aria-label="Source material"
-          />
-          <div className="small muted" style={{ display: "flex", marginTop: 7 }}>
-            <span>
-              {text.length.toLocaleString()} / {MAX_PASTE.toLocaleString()} characters
-              {sourceReady ? "" : " — at least 100 needed"}
-            </span>
-            <span className="spacer" />
-            {text && <button className="btn btn-sm" onClick={() => { setText(""); setSourceName(""); }}>Clear</button>}
-          </div>
-
-          {error && <div className="alert alert-error">{error}</div>}
-
-          <div style={{ display: "flex", marginTop: 20 }}>
-            <span className="spacer" />
-            <button className="btn btn-primary btn-lg" disabled={!sourceReady} onClick={() => setStep(1)}>
-              Next: Configure →
-            </button>
-          </div>
-        </div>
-      )}
-
-      {/* ============ STEP 2: CONFIGURE ============ */}
-      {step === 1 && (
-        <div className="card">
-          <h2>Set up the assignment</h2>
-
-          <div style={{ margin: "18px 0" }}>
-            <span className="field-label">Assignment type</span>
-            <div className="choice-grid">
-              {ASSIGNMENT_TYPES.map((t) => (
-                <button
-                  key={t.id}
-                  className={`choice${config.assignmentType === t.id ? " selected" : ""}`}
-                  onClick={() => update({ assignmentType: t.id })}
-                >
-                  <b>{t.label}</b>
-                  <small>{t.hint}</small>
+            <div className="tabs" style={{ marginTop: 20 }}>
+              {[["paste", "Paste text"], ["upload", "Upload file"], ["url", "From a web page"]].map(([id, label]) => (
+                <button key={id} className={`tab${sourceTab === id ? " active" : ""}`} onClick={() => { setSourceTab(id); setError(""); }}>
+                  {label}
                 </button>
               ))}
             </div>
-          </div>
 
-          <div className="row">
-            <label className="field">
-              <span className="field-label">Grade level</span>
-              <select value={config.gradeLevel} onChange={(e) => update({ gradeLevel: e.target.value })}>
-                {GRADE_LEVELS.map((g) => <option key={g}>{g}</option>)}
-              </select>
-            </label>
-            <label className="field">
-              <span className="field-label">Subject</span>
-              <input
-                type="text"
-                list="subjects"
-                placeholder="e.g. U.S. History, Biology, English Language Arts"
-                value={config.subject}
-                onChange={(e) => update({ subject: e.target.value })}
+            {sourceTab === "upload" && (
+              <div style={{ marginBottom: 14 }}>
+                <input ref={fileRef} type="file" accept=".txt,.md,.markdown,.text,.csv" onChange={onFile} style={{ display: "none" }} />
+                <button className="btn" onClick={() => fileRef.current?.click()}>Choose a .txt or .md file</button>
+                {sourceName && <span className="small muted" style={{ marginLeft: 10 }}>{sourceName}</span>}
+              </div>
+            )}
+
+            {sourceTab === "url" && (
+              <div style={{ display: "flex", gap: 10, marginBottom: 14, flexWrap: "wrap" }}>
+                <input type="url" placeholder="https://example.com/article" value={url}
+                  onChange={(e) => setUrl(e.target.value)}
+                  onKeyDown={(e) => { if (e.key === "Enter" && url.trim()) fetchUrl(); }}
+                  style={{ flex: 1, minWidth: 240 }} />
+                <button className="btn btn-primary" onClick={fetchUrl} disabled={fetching || !url.trim()}>
+                  {fetching ? <><span className="spinner" /> Fetching…</> : "Fetch page"}
+                </button>
+              </div>
+            )}
+
+            <div style={{ flex: 1, display: "flex", flexDirection: "column", marginTop: sourceTab === "paste" ? 4 : 0 }}>
+              <textarea
+                className="source-textarea"
+                value={text}
+                onChange={(e) => { setText(e.target.value.slice(0, MAX_PASTE)); if (sourceTab === "paste") setSourceName(""); }}
+                placeholder={sourceTab === "paste"
+                  ? "Paste your reading passage, chapter, article, or lecture notes here…"
+                  : "The file or page content will appear here — you can trim or edit it before generating."}
+                aria-label="Source material"
               />
-              <datalist id="subjects">
-                {["English Language Arts","U.S. History","World History","Civics / Government","Biology","Chemistry","Physics","Earth Science","Mathematics","Geography","Economics","Health","Computer Science","Spanish","Art History"].map((s) => (
-                  <option key={s} value={s} />
-                ))}
-              </datalist>
-            </label>
-          </div>
+              <div className="small muted" style={{ display: "flex", alignItems: "center", marginTop: 12, paddingTop: 12, borderTop: "1px solid var(--line)" }}>
+                <span>{text.length.toLocaleString()} / {MAX_PASTE.toLocaleString()} characters{sourceReady ? "" : " — at least 100 needed"}</span>
+                <span className="spacer" />
+                {text && <button className="btn btn-sm" onClick={() => { setText(""); setSourceName(""); }}>Clear</button>}
+              </div>
+            </div>
 
-          <div className="row">
-            <label className="field">
-              <span className="field-label">
-                {isDiscussionOrCase ? "Number of prompts/questions" : "Number of questions"} — {config.questionCount}
-              </span>
-              <input
-                type="range" min="1" max="30" value={config.questionCount}
-                onChange={(e) => update({ questionCount: Number(e.target.value) })}
-                style={{ width: "100%", accentColor: "var(--board)" }}
-              />
-            </label>
-            <label className="field">
-              <span className="field-label">Difficulty</span>
-              <select value={config.difficulty} onChange={(e) => update({ difficulty: e.target.value })}>
-                {DIFFICULTIES.map((d) => <option key={d}>{d}</option>)}
-              </select>
-            </label>
-          </div>
+            {error && <div className="alert alert-error"><IconAlertTriangle size={17} /> <span>{error}</span></div>}
+          </>
+        )}
 
-          {!isDiscussionOrCase && (
-            <div style={{ margin: "4px 0 12px" }}>
-              <span className="field-label">Question types to include</span>
-              <div className="row" style={{ gap: 4 }}>
-                {QUESTION_TYPES.map((t) => (
-                  <label key={t.id} className="check" style={{ minWidth: 150, flex: "0 0 auto" }}>
-                    <input
-                      type="checkbox"
-                      checked={config.questionTypes.includes(t.id)}
-                      onChange={() => toggleQType(t.id)}
-                    />
-                    <span>{t.label}</span>
-                  </label>
+        {step === 1 && (
+          <>
+            <span className="field-label" style={{ color: "var(--board)", marginBottom: 8 }}>Step 2 · Configure</span>
+            <h2>Set up the assignment</h2>
+
+            <div style={{ margin: "20px 0" }}>
+              <span className="field-label">Assignment type</span>
+              <div className="choice-grid">
+                {ASSIGNMENT_TYPES.map((t) => (
+                  <button key={t.id} className={`choice${config.assignmentType === t.id ? " selected" : ""}`} onClick={() => update({ assignmentType: t.id })}>
+                    <b>{t.label}</b>
+                    <small>{t.hint}</small>
+                  </button>
                 ))}
               </div>
-              {config.questionTypes.length === 0 && (
-                <div className="field-hint" style={{ color: "var(--redpen)" }}>Pick at least one question type.</div>
-              )}
             </div>
-          )}
 
-          <label className="check">
-            <input type="checkbox" checked={config.includeExplanations} onChange={(e) => update({ includeExplanations: e.target.checked })} />
-            <span>Include explanations in the answer key<small>Why each answer is correct — and for multiple choice, why the others are wrong.</small></span>
-          </label>
-          {!isDiscussionOrCase && (
+            <div className="row">
+              <label className="field">
+                <span className="field-label">Grade level</span>
+                <select value={config.gradeLevel} onChange={(e) => update({ gradeLevel: e.target.value })}>
+                  {GRADE_LEVELS.map((g) => <option key={g}>{g}</option>)}
+                </select>
+              </label>
+              <label className="field">
+                <span className="field-label">Subject</span>
+                <input type="text" list="subjects" placeholder="e.g. U.S. History, Biology, English Language Arts"
+                  value={config.subject} onChange={(e) => update({ subject: e.target.value })} />
+                <datalist id="subjects">
+                  {["English Language Arts","U.S. History","World History","Civics / Government","Biology","Chemistry","Physics","Earth Science","Mathematics","Geography","Economics","Health","Computer Science","Spanish","Art History"].map((s) => (
+                    <option key={s} value={s} />
+                  ))}
+                </datalist>
+              </label>
+            </div>
+
+            <div className="row">
+              <label className="field">
+                <span className="field-label">{isDiscussionOrCase ? "Number of prompts/questions" : "Number of questions"} — {config.questionCount}</span>
+                <input type="range" min="1" max="30" value={config.questionCount}
+                  onChange={(e) => update({ questionCount: Number(e.target.value) })} style={{ width: "100%" }} />
+              </label>
+              <label className="field">
+                <span className="field-label">Difficulty</span>
+                <select value={config.difficulty} onChange={(e) => update({ difficulty: e.target.value })}>
+                  {DIFFICULTIES.map((d) => <option key={d}>{d}</option>)}
+                </select>
+              </label>
+            </div>
+
+            {!isDiscussionOrCase && (
+              <div style={{ margin: "4px 0 14px" }}>
+                <span className="field-label">Question types to include</span>
+                <div style={{ display: "flex", flexWrap: "wrap", gap: "2px 18px" }}>
+                  {QUESTION_TYPES.map((t) => (
+                    <label key={t.id} className="check" style={{ minWidth: 150 }}>
+                      <input type="checkbox" checked={config.questionTypes.includes(t.id)} onChange={() => toggleQType(t.id)} />
+                      <span>{t.label}</span>
+                    </label>
+                  ))}
+                </div>
+                {config.questionTypes.length === 0 && (
+                  <div className="field-hint redpen">Pick at least one question type.</div>
+                )}
+              </div>
+            )}
+
             <label className="check">
-              <input type="checkbox" checked={config.includeRubrics} onChange={(e) => update({ includeRubrics: e.target.checked })} />
-              <span>Include rubrics for essay questions<small>Point-based criteria that sum to the question total.</small></span>
+              <input type="checkbox" checked={config.includeExplanations} onChange={(e) => update({ includeExplanations: e.target.checked })} />
+              <span>Include explanations in the answer key<small>Why each answer is correct — and for multiple choice, why the others are wrong.</small></span>
+            </label>
+            {!isDiscussionOrCase && (
+              <label className="check">
+                <input type="checkbox" checked={config.includeRubrics} onChange={(e) => update({ includeRubrics: e.target.checked })} />
+                <span>Include rubrics for essay questions<small>Point-based criteria that sum to the question total.</small></span>
+              </label>
+            )}
+            <label className="check">
+              <input type="checkbox" checked={config.verify} onChange={(e) => update({ verify: e.target.checked })} />
+              <span>Run the accuracy check<small>A second AI pass reviews every question and answer against your source. Strongly recommended.</small></span>
             </label>
-          )}
-          <label className="check">
-            <input type="checkbox" checked={config.verify} onChange={(e) => update({ verify: e.target.checked })} />
-            <span>Run the accuracy check<small>A second AI pass reviews every question and answer against your source. Strongly recommended — adds a little time.</small></span>
-          </label>
 
-          <label className="field" style={{ marginTop: 12 }}>
-            <span className="field-label">Anything to focus on? <span className="muted" style={{ fontWeight: 400 }}>(optional)</span></span>
-            <input
-              type="text"
-              placeholder="e.g. focus on causes rather than dates; include the vocabulary terms"
-              value={config.focusNote}
-              onChange={(e) => update({ focusNote: e.target.value })}
-            />
-          </label>
+            <label className="field" style={{ marginTop: 14 }}>
+              <span className="field-label">Anything to focus on? <span className="faint" style={{ textTransform: "none", letterSpacing: 0, fontWeight: 400 }}>(optional)</span></span>
+              <input type="text" placeholder="e.g. focus on causes rather than dates; include the vocabulary terms"
+                value={config.focusNote} onChange={(e) => update({ focusNote: e.target.value })} />
+            </label>
+          </>
+        )}
 
-          <div style={{ display: "flex", marginTop: 20, gap: 10 }}>
-            <button className="btn" onClick={() => setStep(0)}>← Back</button>
-            <span className="spacer" />
-            <button className="btn btn-primary btn-lg" disabled={!configReady} onClick={() => setStep(2)}>
-              Next: Generate →
-            </button>
-          </div>
-        </div>
-      )}
+        {step === 2 && (
+          <>
+            <span className="field-label" style={{ color: "var(--board)", marginBottom: 8 }}>Step 3 · Generate</span>
+            <h2>Ready to generate</h2>
+            <p className="muted" style={{ margin: "12px 0 4px", fontSize: "0.96rem" }}>
+              <b style={{ color: "var(--ink)" }}>{ASSIGNMENT_TYPES.find((t) => t.id === config.assignmentType)?.label}</b>{" "}
+              · {config.gradeLevel} · {config.subject || "—"} · {config.questionCount} question{config.questionCount === 1 ? "" : "s"} · {config.difficulty} difficulty
+            </p>
+            <p className="muted small">Source: {sourceName || "Pasted text"} ({text.length.toLocaleString()} characters)</p>
 
-      {/* ============ STEP 3: GENERATE ============ */}
-      {step === 2 && (
-        <div className="card">
-          <h2>Ready to generate</h2>
-          <p className="muted" style={{ margin: "10px 0 4px", fontSize: "0.96rem" }}>
-            <b style={{ color: "var(--ink)" }}>
-              {ASSIGNMENT_TYPES.find((t) => t.id === config.assignmentType)?.label}
-            </b>{" "}
-            · {config.gradeLevel} · {config.subject || "—"} · {config.questionCount} question{config.questionCount === 1 ? "" : "s"} · {config.difficulty} difficulty
-          </p>
-          <p className="muted small">Source: {sourceName || "Pasted text"} ({text.length.toLocaleString()} characters)</p>
+            {genState && !genState.error && (
+              <>
+                <ul className="progress-list" aria-live="polite">
+                  <ProgressStep phase="analyze" label="Reading the source and mapping key concepts" currentPhase={genState.phase} hasVerify={config.verify} />
+                  <ProgressStep phase="generate" label="Writing questions and the answer key" currentPhase={genState.phase} hasVerify={config.verify} />
+                  {config.verify && <ProgressStep phase="verify" label="Checking every answer against the source" currentPhase={genState.phase} hasVerify={config.verify} />}
+                  <ProgressStep phase="save" label="Saving and opening the editor" currentPhase={genState.phase} hasVerify={config.verify} />
+                </ul>
+                <p className="small muted" style={{ marginTop: 16 }}>Local models can take a few minutes for large assignments. Leave this tab open.</p>
+              </>
+            )}
 
-          {!genState && (
-            <div style={{ display: "flex", marginTop: 20, gap: 10 }}>
-              <button className="btn" onClick={() => setStep(1)}>← Back</button>
-              <span className="spacer" />
-              <button className="btn btn-primary btn-lg" onClick={generate} disabled={!!providerNote}>
-                ✎ Generate assignment
-              </button>
-            </div>
-          )}
-
-          {genState && !genState.error && (
-            <>
-              <ul className="progress-list" aria-live="polite">
-                <ProgressStep phase="analyze" label="Reading the source and mapping key concepts" currentPhase={genState.phase} hasVerify={config.verify} />
-                <ProgressStep phase="generate" label="Writing questions and the answer key" currentPhase={genState.phase} hasVerify={config.verify} />
-                {config.verify && <ProgressStep phase="verify" label="Checking every answer against the source" currentPhase={genState.phase} hasVerify={config.verify} />}
-                <ProgressStep phase="save" label="Saving and opening the editor" currentPhase={genState.phase} hasVerify={config.verify} />
-              </ul>
-              <p className="small muted" style={{ marginTop: 16 }}>
-                Local models can take a few minutes for large assignments. Leave this tab open.
-              </p>
-            </>
-          )}
-
-          {genState?.error && (
-            <>
-              <div className="alert alert-error"><b>Generation failed.</b> {genState.error}</div>
-              <div style={{ display: "flex", gap: 10 }}>
-                <button className="btn" onClick={() => setGenState(null)}>Adjust and retry</button>
-                <button className="btn btn-primary" onClick={generate}>Try again</button>
+            {genState?.error && (
+              <div className="alert alert-error" style={{ marginTop: 20 }}>
+                <IconAlertTriangle size={17} /> <span><b>Generation failed.</b> {genState.error}</span>
               </div>
+            )}
+          </>
+        )}
+      </section>
+
+      {/* ============ RIGHT: step tracker + actions ============ */}
+      <aside className="create-aside">
+        <span className="field-label" style={{ color: "var(--ink-soft)" }}>Progress</span>
+        <h2 style={{ fontSize: "1.2rem", margin: "8px 0 24px" }}>Create an assignment</h2>
+
+        {providerNote && (
+          <div className="alert alert-warn" style={{ marginTop: 0 }}>
+            <IconAlertTriangle size={17} />
+            <span>
+              {providerNote.missing === "key" ? "Your selected AI provider needs an API key." : "No AI model is selected yet."}{" "}
+              <a href="/settings">Open Settings</a> to finish setup.
+            </span>
+          </div>
+        )}
+
+        <div className="vsteps">
+          {STEPS.map((s, i) => {
+            const state = step === i ? "active" : step > i ? "done" : "";
+            return (
+              <button
+                key={s.label}
+                className={`vstep ${state}`}
+                style={{ border: 0, background: "none", textAlign: "left", cursor: canGoTo(i) && !generating ? "pointer" : "default", padding: 0, paddingBottom: i === STEPS.length - 1 ? 0 : 22, font: "inherit", width: "100%" }}
+                onClick={() => { if (canGoTo(i) && !generating) setStep(i); }}
+                disabled={!canGoTo(i) || generating}
+              >
+                <span className="vstep-n">{step > i ? <IconCircleCheck size={20} /> : i + 1}</span>
+                <span>
+                  <span className="vstep-title" style={{ display: "block" }}>{s.label}</span>
+                  <span className="vstep-desc">{s.desc}</span>
+                </span>
+              </button>
+            );
+          })}
+        </div>
+
+        <hr className="hr" style={{ margin: "26px 0" }} />
+
+        <div className="tip">
+          <IconBulb size={18} />
+          <p style={{ margin: 0 }}>
+            {step === 0 && <><b>Tip:</b> 300–800 words of clean source text produces the most accurate questions.</>}
+            {step === 1 && <><b>Tip:</b> Mixing question types gives a more rounded check for understanding.</>}
+            {step === 2 && <><b>Tip:</b> Every question keeps a source quote so you can verify it against your material.</>}
+          </p>
+        </div>
+
+        <div style={{ marginTop: "auto", paddingTop: 28, display: "flex", flexDirection: "column", gap: 10 }}>
+          {step === 0 && (
+            <button className="btn btn-primary btn-lg btn-block" disabled={!sourceReady} onClick={() => setStep(1)}>
+              Next: Configure <IconArrowRight size={17} />
+            </button>
+          )}
+          {step === 1 && (
+            <>
+              <button className="btn btn-primary btn-lg btn-block" disabled={!configReady} onClick={() => setStep(2)}>
+                Next: Generate <IconArrowRight size={17} />
+              </button>
+              <button className="btn btn-block" onClick={() => setStep(0)}><IconArrowLeft size={16} /> Back</button>
             </>
           )}
+          {step === 2 && !genState && (
+            <>
+              <button className="btn btn-primary btn-lg btn-block" onClick={generate} disabled={!!providerNote}>
+                <IconPencil size={17} /> Generate assignment
+              </button>
+              <button className="btn btn-block" onClick={() => setStep(1)}><IconArrowLeft size={16} /> Back</button>
+            </>
+          )}
+          {step === 2 && genState?.error && (
+            <>
+              <button className="btn btn-primary btn-block" onClick={generate}>Try again</button>
+              <button className="btn btn-block" onClick={() => setGenState(null)}>Adjust and retry</button>
+            </>
+          )}
+          {step === 0 && !sourceReady && <p className="small faint" style={{ textAlign: "center", margin: 0 }}>Add at least 100 characters to continue</p>}
         </div>
-      )}
+      </aside>
     </div>
   );
 }
 
 async function postJson(url, body) {
-  const res = await fetch(url, {
-    method: "POST",
-    headers: { "Content-Type": "application/json" },
-    body: JSON.stringify(body),
-  });
+  const res = await fetch(url, { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(body) });
   const data = await res.json().catch(() => ({}));
   if (!res.ok) throw new Error(data.error || `Request failed (${res.status}).`);
   return data;
diff --git a/app/settings/page.jsx b/app/settings/page.jsx
index cfffd6a..eb69446 100644
--- a/app/settings/page.jsx
+++ b/app/settings/page.jsx
@@ -1,6 +1,11 @@
 "use client";
 // app/settings/page.jsx — choose and configure your AI provider, all stored locally.
+// Flush two-column "paper form": sticky table of contents + underline-only fields.
 import { useEffect, useRef, useState } from "react";
+import {
+  IconUserCircle, IconCpu, IconSchool, IconAdjustments,
+  IconPhoto, IconRefresh, IconPlug, IconCheck, IconX,
+} from "@tabler/icons-react";
 
 const PROVIDERS = [
   { id: "ollama", name: "Ollama", desc: "Free, private, runs on this computer", local: true },
@@ -9,24 +14,30 @@ const PROVIDERS = [
   { id: "openai", name: "OpenAI (GPT)", desc: "Cloud API — needs an API key", local: false },
   { id: "google", name: "Google AI (Gemini)", desc: "Cloud API — needs an API key", local: false },
 ];
-
 const KEY_LINKS = {
   anthropic: "https://console.anthropic.com/",
   openai: "https://platform.openai.com/api-keys",
   google: "https://aistudio.google.com/apikey",
 };
+const TOC = [
+  { id: "teacher", label: "Teacher & school", icon: IconUserCircle },
+  { id: "provider", label: "AI provider", icon: IconCpu },
+  { id: "canvas", label: "Canvas (LMS)", icon: IconSchool },
+  { id: "generation", label: "Generation defaults", icon: IconAdjustments },
+];
 
 export default function SettingsPage() {
   const [s, setS] = useState(null);
-  const [models, setModels] = useState({});      // provider -> string[]
+  const [models, setModels] = useState({});
   const [modelsBusy, setModelsBusy] = useState("");
-  const [modelsErr, setModelsErr] = useState({}); // provider -> error
-  const [test, setTest] = useState({});           // provider -> {busy, ok, message}
-  const [canvasTest, setCanvasTest] = useState(null); // {busy, ok, message}
-  const [autoInfo, setAutoInfo] = useState(null);  // resolved auto limits for the active model
+  const [modelsErr, setModelsErr] = useState({});
+  const [test, setTest] = useState({});
+  const [canvasTest, setCanvasTest] = useState(null);
+  const [autoInfo, setAutoInfo] = useState(null);
   const [saving, setSaving] = useState(false);
   const [toast, setToast] = useState("");
   const [error, setError] = useState("");
+  const [activeToc, setActiveToc] = useState("teacher");
   const toastTimer = useRef(null);
 
   useEffect(() => {
@@ -38,18 +49,12 @@ export default function SettingsPage() {
   const activeKey = s?.providers?.[activeProvider]?.apiKey || "";
   const autoOn = s ? s.generation?.auto !== false : true;
 
-  // Preview the auto-tuned limits whenever the model selection (or key) changes.
-  // Debounced so typing an API key doesn't fire a request per keystroke.
   useEffect(() => {
     if (!s || !autoOn || !activeModel) { setAutoInfo(null); return; }
     let cancelled = false;
     setAutoInfo(null);
     const t = setTimeout(() => {
-      fetch("/api/providers", {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ action: "defaults", provider: activeProvider, settings: s }),
-      })
+      fetch("/api/providers", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ action: "defaults", provider: activeProvider, settings: s }) })
         .then((r) => r.json())
         .then((d) => { if (!cancelled && !d.error && d.maxTokens) setAutoInfo(d); })
         .catch(() => {});
@@ -58,50 +63,33 @@ export default function SettingsPage() {
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [activeProvider, activeModel, activeKey, autoOn]);
 
-  function showToast(msg) {
-    setToast(msg);
-    clearTimeout(toastTimer.current);
-    toastTimer.current = setTimeout(() => setToast(""), 2400);
-  }
+  // Highlight the TOC entry for the section currently in view.
+  useEffect(() => {
+    if (!s) return;
+    const obs = new IntersectionObserver(
+      (entries) => { entries.forEach((e) => { if (e.isIntersecting) setActiveToc(e.target.id); }); },
+      { rootMargin: "-20% 0px -70% 0px", threshold: 0 }
+    );
+    TOC.forEach(({ id }) => { const el = document.getElementById(id); if (el) obs.observe(el); });
+    return () => obs.disconnect();
+  }, [s]);
 
-  function setProviderField(provider, field, value) {
-    setS((cur) => ({
-      ...cur,
-      providers: { ...cur.providers, [provider]: { ...cur.providers[provider], [field]: value } },
-    }));
-  }
-
-  function setGen(field, value) {
-    setS((cur) => ({ ...cur, generation: { ...cur.generation, [field]: value } }));
-  }
-
-  function setProfile(field, value) {
-    setS((cur) => ({ ...cur, profile: { ...(cur.profile || {}), [field]: value } }));
-  }
-
-  function setCanvas(field, value) {
-    setCanvasTest(null);
-    setS((cur) => ({ ...cur, canvas: { ...(cur.canvas || {}), [field]: value } }));
-  }
+  function showToast(msg) { setToast(msg); clearTimeout(toastTimer.current); toastTimer.current = setTimeout(() => setToast(""), 2400); }
+  function setProviderField(provider, field, value) { setS((cur) => ({ ...cur, providers: { ...cur.providers, [provider]: { ...cur.providers[provider], [field]: value } } })); }
+  function setGen(field, value) { setS((cur) => ({ ...cur, generation: { ...cur.generation, [field]: value } })); }
+  function setProfile(field, value) { setS((cur) => ({ ...cur, profile: { ...(cur.profile || {}), [field]: value } })); }
+  function setCanvas(field, value) { setCanvasTest(null); setS((cur) => ({ ...cur, canvas: { ...(cur.canvas || {}), [field]: value } })); }
 
   async function testCanvas() {
     setCanvasTest({ busy: true });
     try {
-      const res = await fetch("/api/canvas", {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ action: "test", settings: s }),
-      });
+      const res = await fetch("/api/canvas", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ action: "test", settings: s }) });
       const data = await res.json();
       if (!res.ok) throw new Error(data.error || "Test failed.");
       setCanvasTest({ ok: true, message: data.message });
-    } catch (e) {
-      setCanvasTest({ ok: false, message: String(e.message || e) });
-    }
+    } catch (e) { setCanvasTest({ ok: false, message: String(e.message || e) }); }
   }
 
-  // Downscale the logo client-side (max 512px) so it stays a small data URL in db.json
-  // while staying crisp at the printed header size.
   function onLogoFile(e) {
     const file = e.target.files?.[0];
     e.target.value = "";
@@ -123,64 +111,39 @@ export default function SettingsPage() {
   }
 
   async function refreshModels(provider) {
-    setModelsBusy(provider);
-    setModelsErr((e) => ({ ...e, [provider]: "" }));
+    setModelsBusy(provider); setModelsErr((e) => ({ ...e, [provider]: "" }));
     try {
-      const res = await fetch("/api/providers", {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ action: "models", provider, settings: s }),
-      });
+      const res = await fetch("/api/providers", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ action: "models", provider, settings: s }) });
       const data = await res.json();
       if (!res.ok) throw new Error(data.error || "Could not list models.");
       setModels((m) => ({ ...m, [provider]: data.models }));
-      if (data.models.length && !data.models.includes(s.providers[provider].model)) {
-        setProviderField(provider, "model", data.models[0]);
-      }
-    } catch (e) {
-      setModelsErr((er) => ({ ...er, [provider]: String(e.message || e) }));
-    } finally {
-      setModelsBusy("");
-    }
+      if (data.models.length && !data.models.includes(s.providers[provider].model)) setProviderField(provider, "model", data.models[0]);
+    } catch (e) { setModelsErr((er) => ({ ...er, [provider]: String(e.message || e) })); }
+    finally { setModelsBusy(""); }
   }
 
   async function testConnection(provider) {
     setTest((t) => ({ ...t, [provider]: { busy: true } }));
     try {
-      const res = await fetch("/api/providers", {
-        method: "POST",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ action: "test", provider, settings: s }),
-      });
+      const res = await fetch("/api/providers", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ action: "test", provider, settings: s }) });
       const data = await res.json();
       if (!res.ok) throw new Error(data.error || "Test failed.");
       setTest((t) => ({ ...t, [provider]: { ok: true, message: data.message } }));
-    } catch (e) {
-      setTest((t) => ({ ...t, [provider]: { ok: false, message: String(e.message || e) } }));
-    }
+    } catch (e) { setTest((t) => ({ ...t, [provider]: { ok: false, message: String(e.message || e) } })); }
   }
 
   async function save() {
-    setSaving(true);
-    setError("");
+    setSaving(true); setError("");
     try {
-      const res = await fetch("/api/settings", {
-        method: "PUT",
-        headers: { "Content-Type": "application/json" },
-        body: JSON.stringify(s),
-      });
+      const res = await fetch("/api/settings", { method: "PUT", headers: { "Content-Type": "application/json" }, body: JSON.stringify(s) });
       const data = await res.json();
       if (!res.ok) throw new Error(data.error || "Save failed.");
-      setS(data);
-      showToast("Settings saved");
-    } catch (e) {
-      setError(String(e.message || e));
-    } finally {
-      setSaving(false);
-    }
+      setS(data); showToast("Settings saved");
+    } catch (e) { setError(String(e.message || e)); }
+    finally { setSaving(false); }
   }
 
-  if (!s) return <p className="muted"><span className="spinner" /> Loading…</p>;
+  if (!s) return <div className="page page-narrow"><p className="muted"><span className="spinner" /> Loading…</p></div>;
 
   const active = s.provider;
   const activeCfg = s.providers[active] || {};
@@ -189,7 +152,7 @@ export default function SettingsPage() {
   const t = test[active];
 
   return (
-    <div>
+    <div className="page page-narrow">
       <div className="page-head">
         <h1>Settings</h1>
         <p>Pick the AI that powers generation. Local options keep everything — source material, questions, API traffic — on this computer. Keys and settings are stored only in your local <code>data/db.json</code> file.</p>
@@ -197,238 +160,195 @@ export default function SettingsPage() {
 
       {error && <div className="alert alert-error">{error}</div>}
 
-      <div className="card">
-        <h2>Teacher &amp; school</h2>
-        <p className="field-hint" style={{ marginTop: 4 }}>
-          Shown in the header of every printed and exported assignment — leave anything blank to omit it.
-        </p>
-        <div className="row" style={{ marginTop: 14 }}>
-          <label className="field">
-            <span className="field-label">Teacher name</span>
-            <input type="text" value={s.profile?.teacherName || ""}
-              onChange={(e) => setProfile("teacherName", e.target.value)}
-              placeholder="e.g. Mr. Drew" />
-          </label>
-          <label className="field">
-            <span className="field-label">Class / course</span>
-            <input type="text" value={s.profile?.className || ""}
-              onChange={(e) => setProfile("className", e.target.value)}
-              placeholder="e.g. 7th Grade Science — Period 3" />
-          </label>
-          <label className="field">
-            <span className="field-label">School name</span>
-            <input type="text" value={s.profile?.schoolName || ""}
-              onChange={(e) => setProfile("schoolName", e.target.value)}
-              placeholder="e.g. Lincoln Middle School" />
-          </label>
-        </div>
-        <div className="field">
-          <span className="field-label">School logo or mascot (optional)</span>
-          <div style={{ display: "flex", gap: 12, alignItems: "center", flexWrap: "wrap" }}>
-            {s.profile?.logo && (
-              <img src={s.profile.logo} alt="School logo preview"
-                style={{ height: 52, maxWidth: 140, objectFit: "contain", background: "#fff", border: "1px solid var(--line)", borderRadius: 6, padding: 4 }} />
-            )}
-            <label className="btn" style={{ cursor: "pointer" }}>
-              {s.profile?.logo ? "Replace image" : "Upload image"}
-              <input type="file" accept="image/*" onChange={onLogoFile} style={{ display: "none" }} />
-            </label>
-            {s.profile?.logo && (
-              <button className="btn btn-danger" onClick={() => setProfile("logo", "")}>Remove</button>
-            )}
-          </div>
-          <span className="field-hint">Appears beside the school name on printed pages. PNG with transparency looks best; the image is stored locally and shrunk automatically.</span>
-        </div>
-      </div>
-
-      <div className="card">
-        <h2>AI provider</h2>
-        <div style={{ marginTop: 14 }}>
-          {PROVIDERS.map((p) => (
-            <label key={p.id} className={"provider-row" + (active === p.id ? " selected" : "")}>
-              <input type="radio" name="provider" checked={active === p.id} onChange={() => setS((cur) => ({ ...cur, provider: p.id }))} />
-              <span>
-                <b>{p.name}</b>
-                <small>{p.desc}</small>
-              </span>
-              {p.local && <span className="chip local-tag">Private · local</span>}
-            </label>
+      <div className="settings-grid">
+        <nav className="settings-toc" aria-label="Settings sections">
+          <span className="field-label" style={{ padding: "0 12px 8px" }}>On this page</span>
+          {TOC.map(({ id, label, icon: Icon }) => (
+            <a key={id} href={`#${id}`} className={`toc-link${activeToc === id ? " active" : ""}`}><Icon size={16} /> {label}</a>
           ))}
-        </div>
+        </nav>
 
-        <hr className="hr" />
-        <h3 style={{ marginBottom: 12 }}>{PROVIDERS.find((p) => p.id === active)?.name} setup</h3>
+        <div className="settings-body">
+          {/* ---- Teacher & school ---- */}
+          <section className="sec" id="teacher">
+            <h2>Teacher &amp; school</h2>
+            <p className="sec-hint">Shown in the header of every printed and exported assignment — leave anything blank to omit it.</p>
+            <div style={{ display: "grid", gridTemplateColumns: "repeat(auto-fit, minmax(180px, 1fr))", gap: 26, marginBottom: 26 }}>
+              <div className="ul-field" style={{ marginBottom: 0 }}>
+                <span className="field-label">Teacher name</span>
+                <input className="ul-input" type="text" value={s.profile?.teacherName || ""} onChange={(e) => setProfile("teacherName", e.target.value)} placeholder="e.g. Mr. Drew" />
+              </div>
+              <div className="ul-field" style={{ marginBottom: 0 }}>
+                <span className="field-label">Class / course</span>
+                <input className="ul-input" type="text" value={s.profile?.className || ""} onChange={(e) => setProfile("className", e.target.value)} placeholder="e.g. 7th Grade Science — Period 3" />
+              </div>
+              <div className="ul-field" style={{ marginBottom: 0 }}>
+                <span className="field-label">School name</span>
+                <input className="ul-input" type="text" value={s.profile?.schoolName || ""} onChange={(e) => setProfile("schoolName", e.target.value)} placeholder="e.g. Lincoln Middle School" />
+              </div>
+            </div>
+            <span className="field-label">School logo or mascot <span className="faint" style={{ textTransform: "none", letterSpacing: 0, fontWeight: 400 }}>(optional)</span></span>
+            <div style={{ display: "flex", gap: 12, alignItems: "center", flexWrap: "wrap", marginTop: 6 }}>
+              {s.profile?.logo && (
+                <img src={s.profile.logo} alt="School logo preview" style={{ height: 52, maxWidth: 140, objectFit: "contain", background: "#fff", border: "1px solid var(--line)", borderRadius: 6, padding: 4 }} />
+              )}
+              <label className="btn" style={{ cursor: "pointer" }}>
+                <IconPhoto size={16} /> {s.profile?.logo ? "Replace image" : "Upload image"}
+                <input type="file" accept="image/*" onChange={onLogoFile} style={{ display: "none" }} />
+              </label>
+              {s.profile?.logo && <button className="btn btn-ghost btn-danger" style={{ borderColor: "transparent" }} onClick={() => setProfile("logo", "")}>Remove</button>}
+            </div>
+            <span className="field-hint">Appears beside the school name on printed pages. PNG with transparency looks best; the image is stored locally and shrunk automatically.</span>
+          </section>
 
-        {isLocal && (
-          <label className="field">
-            <span className="field-label">Server address (base URL)</span>
-            <input
-              type="text" value={activeCfg.baseUrl || ""}
-              onChange={(e) => setProviderField(active, "baseUrl", e.target.value)}
-              placeholder={active === "ollama" ? "http://localhost:11434" : "http://localhost:1234"}
-            />
-            <span className="field-hint">
-              {active === "ollama"
-                ? <>Where this app should find Ollama. Same computer: the default is right. Ollama on another machine (or this app in Docker on a different box): enter that machine&rsquo;s address, e.g. <code>http://192.168.1.50:11434</code> — and on that machine set <code>OLLAMA_HOST=0.0.0.0</code> so Ollama accepts network connections. Use &ldquo;Test connection&rdquo; below to confirm.</>
-                : <>Where this app should find LM Studio. Same computer: the default is right. LM Studio on another machine: enter its address, e.g. <code>http://192.168.1.50:1234</code> — and in LM Studio&rsquo;s Developer tab enable &ldquo;Serve on Local Network&rdquo;. Use &ldquo;Test connection&rdquo; below to confirm.</>}
-            </span>
-          </label>
-        )}
+          {/* ---- AI provider ---- */}
+          <section className="sec" id="provider">
+            <h2>AI provider</h2>
+            <div className="provider-list" style={{ marginTop: 16 }}>
+              {PROVIDERS.map((p) => (
+                <label key={p.id} className={"provider-row" + (active === p.id ? " selected" : "")}>
+                  <input type="radio" name="provider" checked={active === p.id} onChange={() => setS((cur) => ({ ...cur, provider: p.id }))} />
+                  <span style={{ flex: 1 }}>
+                    <b style={active === p.id ? { color: "var(--board-deep)" } : undefined}>{p.name}</b>
+                    <small>{p.desc}</small>
+                  </span>
+                  {p.local && <span className="chip chip-pill local-tag">Private · local</span>}
+                </label>
+              ))}
+            </div>
 
-        {!isLocal && (
-          <label className="field">
-            <span className="field-label">API key</span>
-            <input
-              type="password" value={activeCfg.apiKey || ""}
-              onChange={(e) => setProviderField(active, "apiKey", e.target.value)}
-              placeholder="Paste your API key"
-              autoComplete="off"
-            />
-            <span className="field-hint">
-              Get a key at <a href={KEY_LINKS[active]} target="_blank" rel="noreferrer">{KEY_LINKS[active]}</a>. It is stored only on this computer.
-            </span>
-          </label>
-        )}
+            <h3 style={{ margin: "26px 0 16px" }}>{PROVIDERS.find((p) => p.id === active)?.name} setup</h3>
 
-        <label className="field">
-          <span className="field-label">Model</span>
-          <div style={{ display: "flex", gap: 8, flexWrap: "wrap" }}>
-            {modelList.length > 0 ? (
-              <select value={activeCfg.model || ""} onChange={(e) => setProviderField(active, "model", e.target.value)} style={{ flex: 1, minWidth: 220 }}>
-                {!modelList.includes(activeCfg.model) && activeCfg.model && <option value={activeCfg.model}>{activeCfg.model}</option>}
-                {modelList.map((m) => <option key={m} value={m}>{m}</option>)}
-              </select>
-            ) : (
-              <input
-                type="text" value={activeCfg.model || ""}
-                onChange={(e) => setProviderField(active, "model", e.target.value)}
-                placeholder={active === "ollama" ? "e.g. llama3.1:8b" : "Model name"}
-                style={{ flex: 1, minWidth: 220 }}
-              />
+            {isLocal && (
+              <div className="ul-field">
+                <span className="field-label">Server address (base URL)</span>
+                <input className="ul-input" type="text" value={activeCfg.baseUrl || ""} onChange={(e) => setProviderField(active, "baseUrl", e.target.value)}
+                  placeholder={active === "ollama" ? "http://localhost:11434" : "http://localhost:1234"} />
+                <span className="field-hint">
+                  {active === "ollama"
+                    ? <>Where this app should find Ollama. Same computer: the default is right. On another machine, enter that machine&rsquo;s address, e.g. <code>http://192.168.1.50:11434</code> — and set <code>OLLAMA_HOST=0.0.0.0</code> there. Use &ldquo;Test connection&rdquo; to confirm.</>
+                    : <>Where this app should find LM Studio. Same computer: the default is right. On another machine: enter its address, e.g. <code>http://192.168.1.50:1234</code> — and in LM Studio&rsquo;s Developer tab enable &ldquo;Serve on Local Network&rdquo;.</>}
+                </span>
+              </div>
             )}
-            <button className="btn" onClick={() => refreshModels(active)} disabled={modelsBusy === active}>
-              {modelsBusy === active ? <><span className="spinner" /> Looking…</> : "Refresh models"}
+
+            {!isLocal && (
+              <div className="ul-field">
+                <span className="field-label">API key</span>
+                <input className="ul-input" type="password" value={activeCfg.apiKey || ""} onChange={(e) => setProviderField(active, "apiKey", e.target.value)} placeholder="Paste your API key" autoComplete="off" />
+                <span className="field-hint">Get a key at <a href={KEY_LINKS[active]} target="_blank" rel="noreferrer">{KEY_LINKS[active]}</a>. It is stored only on this computer.</span>
+              </div>
+            )}
+
+            <div className="ul-field">
+              <span className="field-label">Model</span>
+              <div style={{ display: "flex", gap: 12, flexWrap: "wrap", alignItems: "flex-end" }}>
+                {modelList.length > 0 ? (
+                  <select className="ul-input" value={activeCfg.model || ""} onChange={(e) => setProviderField(active, "model", e.target.value)} style={{ flex: 1, minWidth: 220 }}>
+                    {!modelList.includes(activeCfg.model) && activeCfg.model && <option value={activeCfg.model}>{activeCfg.model}</option>}
+                    {modelList.map((m) => <option key={m} value={m}>{m}</option>)}
+                  </select>
+                ) : (
+                  <input className="ul-input" type="text" value={activeCfg.model || ""} onChange={(e) => setProviderField(active, "model", e.target.value)}
+                    placeholder={active === "ollama" ? "e.g. llama3.1:8b" : "Model name"} style={{ flex: 1, minWidth: 220 }} />
+                )}
+                <button className="btn" onClick={() => refreshModels(active)} disabled={modelsBusy === active}>
+                  {modelsBusy === active ? <><span className="spinner" /> Looking…</> : <><IconRefresh size={15} /> Refresh models</>}
+                </button>
+              </div>
+              {modelsErr[active]
+                ? <span className="field-hint redpen">{modelsErr[active]}</span>
+                : <span className="field-hint">Accuracy tip: bigger models write noticeably better questions. Locally, prefer an 8B+ model; in the cloud, the default models work well.</span>}
+            </div>
+
+            <div style={{ display: "flex", gap: 10, alignItems: "center", flexWrap: "wrap" }}>
+              <button className="btn" onClick={() => testConnection(active)} disabled={t?.busy}>
+                {t?.busy ? <><span className="spinner" /> Testing…</> : <><IconPlug size={15} /> Test connection</>}
+              </button>
+              {t && !t.busy && (
+                <span className="small" style={{ fontWeight: 600, color: t.ok ? "var(--board)" : "var(--redpen)", display: "inline-flex", alignItems: "center", gap: 4 }}>
+                  {t.ok ? <IconCheck size={15} /> : <IconX size={15} />}{t.message}
+                </span>
+              )}
+            </div>
+          </section>
+
+          {/* ---- Canvas LMS ---- */}
+          <section className="sec" id="canvas">
+            <h2>Canvas (LMS) integration</h2>
+            <p className="sec-hint">Optional. Lets you push a finished assignment straight into a Canvas course from the editor. You can always skip this and use the downloadable Canvas <code>.zip</code> instead.</p>
+            <div className="ul-field">
+              <span className="field-label">Canvas web address</span>
+              <input className="ul-input" type="text" value={s.canvas?.baseUrl || ""} onChange={(e) => setCanvas("baseUrl", e.target.value)} placeholder="https://yourschool.instructure.com" autoComplete="off" />
+              <span className="field-hint">The address you use to log into Canvas — e.g. <code>https://yourschool.instructure.com</code>.</span>
+            </div>
+            <div className="ul-field">
+              <span className="field-label">Access token</span>
+              <input className="ul-input" type="password" value={s.canvas?.token || ""} onChange={(e) => setCanvas("token", e.target.value)} placeholder="Paste your Canvas access token" autoComplete="off" />
+              <span className="field-hint">In Canvas: <b>Account → Settings → Approved Integrations → + New Access Token</b>. Stored only on this computer. Some schools restrict tokens — if yours does, use the <code>.zip</code> export instead.</span>
+            </div>
+            <div style={{ display: "flex", gap: 10, alignItems: "center", flexWrap: "wrap" }}>
+              <button className="btn" onClick={testCanvas} disabled={canvasTest?.busy || !s.canvas?.baseUrl || !s.canvas?.token}>
+                {canvasTest?.busy ? <><span className="spinner" /> Testing…</> : <><IconPlug size={15} /> Test connection</>}
+              </button>
+              {canvasTest && !canvasTest.busy && (
+                <span className="small" style={{ fontWeight: 600, color: canvasTest.ok ? "var(--board)" : "var(--redpen)", display: "inline-flex", alignItems: "center", gap: 4 }}>
+                  {canvasTest.ok ? <IconCheck size={15} /> : <IconX size={15} />}{canvasTest.message}
+                </span>
+              )}
+            </div>
+          </section>
+
+          {/* ---- Generation defaults ---- */}
+          <section className="sec" id="generation">
+            <h2>Generation defaults</h2>
+            <label className="check" style={{ marginTop: 14 }}>
+              <input type="checkbox" checked={autoOn} onChange={(e) => setGen("auto", e.target.checked)} />
+              <span>Set size limits automatically (recommended)<small>Matches source size and response length to the selected model&rsquo;s real context window — local models get safe limits, large cloud models get room for much longer sources and answers.</small></span>
+            </label>
+            {autoOn && (
+              <p className="field-hint" style={{ margin: "0 0 8px 30px", fontStyle: "italic" }}>
+                {!activeModel ? "Pick a model above to see its tuned limits."
+                  : autoInfo
+                    ? `Tuned for ${activeModel}: sources up to ${autoInfo.maxSourceChars.toLocaleString()} characters, responses up to ${autoInfo.maxTokens.toLocaleString()} tokens (context window ≈ ${Math.round(autoInfo.caps.contextTokens / 1000).toLocaleString()}k tokens${autoInfo.caps.source === "fallback" ? ", estimated — couldn't read the model's limits" : ""}).`
+                    : <><span className="spinner" /> Checking the model&rsquo;s limits…</>}
+              </p>
+            )}
+            <div className="row" style={{ marginTop: 14 }}>
+              <label className="field" style={{ maxWidth: 540 }}>
+                <span className="field-label">Temperature — {Number(s.generation.temperature).toFixed(1)}</span>
+                <input type="range" min="0" max="1" step="0.1" value={s.generation.temperature} onChange={(e) => setGen("temperature", Number(e.target.value))} style={{ width: "100%" }} />
+                <span className="field-hint">Lower = more precise and literal (best for accuracy). 0.2–0.4 recommended.</span>
+              </label>
+              {!autoOn && (
+                <label className="field">
+                  <span className="field-label">Max response length (tokens)</span>
+                  <input type="number" min="1000" max="64000" step="500" value={s.generation.maxTokens} onChange={(e) => setGen("maxTokens", Math.max(1000, Number(e.target.value) || 8000))} />
+                  <span className="field-hint">Raise this if very long assignments come back cut off. Capped to the model&rsquo;s own output limit.</span>
+                </label>
+              )}
+              {!autoOn && (
+                <label className="field">
+                  <span className="field-label">Max source size (characters)</span>
+                  <input type="number" min="4000" max="300000" step="1000" value={s.generation.maxSourceChars} onChange={(e) => setGen("maxSourceChars", Math.max(4000, Number(e.target.value) || 24000))} />
+                  <span className="field-hint">Longer sources are trimmed to this before being sent to the model. Local models do better around 16,000–24,000.</span>
+                </label>
+              )}
+            </div>
+            <label className="check">
+              <input type="checkbox" checked={s.generation.verification !== false} onChange={(e) => setGen("verification", e.target.checked)} />
+              <span>Run the accuracy check by default<small>A second pass that verifies every answer against the source. You can still toggle it per assignment.</small></span>
+            </label>
+          </section>
+
+          <div style={{ display: "flex", justifyContent: "flex-end", paddingTop: 28, borderTop: "1px solid var(--line)", marginTop: 8 }}>
+            <button className="btn btn-primary btn-lg" onClick={save} disabled={saving}>
+              {saving ? "Saving…" : <><IconCheck size={16} /> Save settings</>}
             </button>
           </div>
-          {modelsErr[active] && <span className="field-hint" style={{ color: "var(--redpen)" }}>{modelsErr[active]}</span>}
-          {!modelsErr[active] && (
-            <span className="field-hint">
-              Accuracy tip: bigger models write noticeably better questions. Locally, prefer an 8B+ model; in the cloud, the default models work well.
-            </span>
-          )}
-        </label>
-
-        <div style={{ display: "flex", gap: 10, alignItems: "center", flexWrap: "wrap" }}>
-          <button className="btn" onClick={() => testConnection(active)} disabled={t?.busy}>
-            {t?.busy ? <><span className="spinner" /> Testing…</> : "Test connection"}
-          </button>
-          {t && !t.busy && (
-            <span className={"small " + (t.ok ? "" : "redpen")} style={t.ok ? { color: "var(--board)", fontWeight: 600 } : { fontWeight: 600 }}>
-              {t.ok ? "✓ " : "✕ "}{t.message}
-            </span>
-          )}
         </div>
       </div>
 
-      <div className="card">
-        <h2>Canvas (LMS) integration</h2>
-        <p className="field-hint" style={{ marginTop: 4 }}>
-          Optional. Lets you push a finished assignment straight into a Canvas course from the editor.
-          You can always skip this and use the downloadable Canvas <code>.zip</code> instead.
-        </p>
-        <label className="field" style={{ marginTop: 14 }}>
-          <span className="field-label">Canvas web address</span>
-          <input
-            type="text" value={s.canvas?.baseUrl || ""}
-            onChange={(e) => setCanvas("baseUrl", e.target.value)}
-            placeholder="https://yourschool.instructure.com"
-            autoComplete="off"
-          />
-          <span className="field-hint">The address you use to log into Canvas — e.g. <code>https://yourschool.instructure.com</code>.</span>
-        </label>
-        <label className="field">
-          <span className="field-label">Access token</span>
-          <input
-            type="password" value={s.canvas?.token || ""}
-            onChange={(e) => setCanvas("token", e.target.value)}
-            placeholder="Paste your Canvas access token"
-            autoComplete="off"
-          />
-          <span className="field-hint">
-            In Canvas: <b>Account → Settings → Approved Integrations → + New Access Token</b>. Stored only on this computer.
-            Some schools restrict tokens — if yours does, use the <code>.zip</code> export instead.
-          </span>
-        </label>
-        <div style={{ display: "flex", gap: 10, alignItems: "center", flexWrap: "wrap" }}>
-          <button className="btn" onClick={testCanvas} disabled={canvasTest?.busy || !s.canvas?.baseUrl || !s.canvas?.token}>
-            {canvasTest?.busy ? <><span className="spinner" /> Testing…</> : "Test connection"}
-          </button>
-          {canvasTest && !canvasTest.busy && (
-            <span className="small" style={canvasTest.ok ? { color: "var(--board)", fontWeight: 600 } : { fontWeight: 600 }}>
-              {canvasTest.ok ? "✓ " : "✕ "}{canvasTest.message}
-            </span>
-          )}
-        </div>
-      </div>
-
-      <div className="card">
-        <h2>Generation defaults</h2>
-        <label className="check" style={{ marginTop: 14 }}>
-          <input type="checkbox" checked={autoOn} onChange={(e) => setGen("auto", e.target.checked)} />
-          <span>
-            Set size limits automatically (recommended)
-            <small>Matches source size and response length to the selected model's real context window — local models get safe limits, large cloud models get room for much longer sources and answers.</small>
-          </span>
-        </label>
-        {autoOn && (
-          <p className="field-hint" style={{ margin: "0 0 4px 30px" }}>
-            {!activeModel
-              ? "Pick a model above to see its tuned limits."
-              : autoInfo
-                ? `Tuned for ${activeModel}: sources up to ${autoInfo.maxSourceChars.toLocaleString()} characters, responses up to ${autoInfo.maxTokens.toLocaleString()} tokens (context window ≈ ${Math.round(autoInfo.caps.contextTokens / 1000).toLocaleString()}k tokens${autoInfo.caps.source === "fallback" ? ", estimated — couldn't read the model's limits" : ""}).`
-                : <><span className="spinner" /> Checking the model's limits…</>}
-          </p>
-        )}
-        <div className="row" style={{ marginTop: 14 }}>
-          <label className="field">
-            <span className="field-label">Temperature — {Number(s.generation.temperature).toFixed(1)}</span>
-            <input
-              type="range" min="0" max="1" step="0.1" value={s.generation.temperature}
-              onChange={(e) => setGen("temperature", Number(e.target.value))}
-              style={{ width: "100%", accentColor: "var(--board)" }}
-            />
-            <span className="field-hint">Lower = more precise and literal (best for accuracy). 0.2–0.4 recommended.</span>
-          </label>
-          {!autoOn && (
-            <label className="field">
-              <span className="field-label">Max response length (tokens)</span>
-              <input type="number" min="1000" max="64000" step="500" value={s.generation.maxTokens}
-                onChange={(e) => setGen("maxTokens", Math.max(1000, Number(e.target.value) || 8000))} />
-              <span className="field-hint">Raise this if very long assignments come back cut off. Capped to the model's own output limit.</span>
-            </label>
-          )}
-          {!autoOn && (
-            <label className="field">
-              <span className="field-label">Max source size (characters)</span>
-              <input type="number" min="4000" max="300000" step="1000" value={s.generation.maxSourceChars}
-                onChange={(e) => setGen("maxSourceChars", Math.max(4000, Number(e.target.value) || 24000))} />
-              <span className="field-hint">Longer sources are trimmed to this before being sent to the model. Local models with small context windows do better around 16,000–24,000.</span>
-            </label>
-          )}
-        </div>
-        <label className="check">
-          <input type="checkbox" checked={s.generation.verification !== false} onChange={(e) => setGen("verification", e.target.checked)} />
-          <span>Run the accuracy check by default<small>A second pass that verifies every answer against the source. You can still toggle it per assignment.</small></span>
-        </label>
-      </div>
-
-      <div style={{ display: "flex", marginTop: 18 }}>
-        <span className="spacer" />
-        <button className="btn btn-primary btn-lg" onClick={save} disabled={saving}>
-          {saving ? "Saving…" : "Save settings"}
-        </button>
-      </div>
-
       {toast && <div className="toast">{toast}</div>}
     </div>
   );
diff --git a/components/CanvasExportDialog.jsx b/components/CanvasExportDialog.jsx
index d1a1812..284cf77 100644
--- a/components/CanvasExportDialog.jsx
+++ b/components/CanvasExportDialog.jsx
@@ -3,6 +3,7 @@
 // assignment. Auto-fills everything derivable; exposes the optional Canvas quiz settings
 // a teacher may want to set. Pure client-side (no upload) — see lib/canvas/export.js.
 import { useEffect, useMemo, useState } from "react";
+import { IconX } from "@tabler/icons-react";
 import { mapAssignmentToCanvas } from "@/lib/canvas/map";
 import { exportCanvasZip } from "@/lib/canvas/export";
 
@@ -145,18 +146,11 @@ export default function CanvasExportDialog({ assignment, onClose, onDone, onErro
   }
 
   return (
-    <div
-      onClick={onClose}
-      style={{
-        position: "fixed", inset: 0, zIndex: 100, background: "rgba(20,30,26,0.45)",
-        display: "flex", alignItems: "flex-start", justifyContent: "center",
-        padding: "40px 16px", overflowY: "auto",
-      }}
-    >
+    <div className="modal-scrim" onClick={onClose}>
       <div
         onClick={(e) => e.stopPropagation()}
-        className="card"
-        style={{ width: 560, maxWidth: "100%", padding: 24, animation: "fade-in-up 0.18s ease" }}
+        className="modal"
+        style={{ width: 560, maxWidth: "100%", padding: 24 }}
       >
         <div style={{ display: "flex", alignItems: "flex-start", gap: 12 }}>
           <div style={{ flex: 1 }}>
@@ -165,7 +159,7 @@ export default function CanvasExportDialog({ assignment, onClose, onDone, onErro
               Downloads a QTI <code>.zip</code>. In Canvas: <b>Settings → Import Course Content → QTI .zip file</b>.
             </p>
           </div>
-          <button className="btn btn-sm" onClick={onClose} aria-label="Close">✕</button>
+          <button className="icon-btn" onClick={onClose} aria-label="Close"><IconX size={16} /></button>
         </div>
 
         {/* Summary of what will be exported */}
diff --git a/components/Nav.jsx b/components/Nav.jsx
deleted file mode 100644
index 4221186..0000000
--- a/components/Nav.jsx
+++ /dev/null
@@ -1,65 +0,0 @@
-"use client";
-import Link from "next/link";
-import { usePathname } from "next/navigation";
-import { useEffect, useState } from "react";
-
-const LINKS = [
-  { href: "/", label: "Create" },
-  { href: "/library", label: "Library" },
-  { href: "/settings", label: "Settings" },
-];
-
-export default function Nav() {
-  const pathname = usePathname();
-  const [theme, setTheme] = useState(null);
-  const [scrolled, setScrolled] = useState(false);
-
-  useEffect(() => {
-    setTheme(document.documentElement.dataset.theme === "dark" ? "dark" : "light");
-  }, []);
-
-  useEffect(() => {
-    function onScroll() {
-      setScrolled(window.scrollY > 8);
-    }
-    window.addEventListener("scroll", onScroll, { passive: true });
-    return () => window.removeEventListener("scroll", onScroll);
-  }, []);
-
-  function toggleTheme() {
-    const next = document.documentElement.dataset.theme === "dark" ? "light" : "dark";
-    document.documentElement.dataset.theme = next;
-    try { localStorage.setItem("theme", next); } catch {}
-    setTheme(next);
-  }
-
-  return (
-    <header className={`topnav${scrolled ? " nav-scrolled" : ""}`}>
-      <div className="topnav-inner">
-        <Link href="/" className="brand">
-          <span className="brand-mark" aria-hidden="true">✎</span>
-          <span className="brand-text">Mr. Drew&rsquo;s Assignment Creator</span>
-        </Link>
-        <nav className="navlinks" aria-label="Main">
-          {LINKS.map((l) => {
-            const active = l.href === "/" ? pathname === "/" : pathname.startsWith(l.href);
-            return (
-              <Link key={l.href} href={l.href} className={`navlink${active ? " active" : ""}`}>
-                {l.label}
-              </Link>
-            );
-          })}
-        </nav>
-        <button
-          type="button"
-          className="icon-btn theme-toggle"
-          onClick={toggleTheme}
-          aria-label={theme === "dark" ? "Switch to light mode" : "Switch to dark mode"}
-          title={theme === "dark" ? "Switch to light mode" : "Switch to dark mode"}
-        >
-          {theme === "dark" ? "☀" : "☾"}
-        </button>
-      </div>
-    </header>
-  );
-}
diff --git a/components/QuestionCard.jsx b/components/QuestionCard.jsx
index a6ab501..7272488 100644
--- a/components/QuestionCard.jsx
+++ b/components/QuestionCard.jsx
@@ -1,7 +1,12 @@
 "use client";
-// components/QuestionCard.jsx — edit any question inline, with the answer key
-// styled in red pen and grading-stamp verification badges.
+// components/QuestionCard.jsx — one question rendered as a row in the editor
+// document: a left rail (drag grip + number), the prompt/options in the center,
+// and the answer key in the right margin, styled in red pen.
 import { useState } from "react";
+import {
+  IconGripVertical, IconArrowUp, IconArrowDown, IconRefresh, IconX,
+  IconCircleCheck, IconAlertTriangle, IconArrowRight,
+} from "@tabler/icons-react";
 import { questionTypeLabel } from "@/lib/schema";
 
 const LETTERS = "ABCDEFGHIJ";
@@ -10,218 +15,243 @@ function AutoTextarea({ value, onChange, rows = 2, ...rest }) {
   return <textarea value={value || ""} rows={rows} onChange={(e) => onChange(e.target.value)} {...rest} />;
 }
 
-export default function QuestionCard({ q, index, count, onChange, onMove, onDelete, onRegenerate, busy }) {
+export default function QuestionCard({
+  q, index, count, onChange, onMove, onDelete, onRegenerate, busy,
+  dragging, over, onDragStart, onDragEnter, onDrop, onDragEnd,
+}) {
   const [regenOpen, setRegenOpen] = useState(false);
   const [note, setNote] = useState("");
+  const [grabbed, setGrabbed] = useState(false);
 
   function set(patch) {
     onChange({ ...q, ...patch, verification: patch.verification || { status: "unchecked", note: "" } });
   }
-  // Editing content invalidates the old verification stamp (set() above resets it),
-  // but pure point changes shouldn't:
-  function setPoints(points) {
-    onChange({ ...q, points });
-  }
+  function setPoints(points) { onChange({ ...q, points }); }
 
   const v = q.verification || { status: "unchecked" };
+  const hasMargin = q.type !== "matching"; // matching edits pairs in the center; others use the margin
 
   return (
-    <div className="card qcard">
-      <div className="qcard-head">
-        <span className="qnum">{index + 1}.</span>
-        <span className="chip chip-neutral">{questionTypeLabel(q.type)}</span>
-        {v.status === "pass" && <span className="stamp stamp-pass" title="The accuracy check confirmed this answer against your source.">✓ Verified</span>}
-        {v.status === "warn" && <span className="stamp stamp-warn" title={v.note}>⚠ Check this</span>}
-        <span className="qcard-actions">
-          <label className="small muted" style={{ display: "inline-flex", alignItems: "center", gap: 5 }}>
-            <input className="points-input" type="number" min="0" max="100" value={q.points}
-              onChange={(e) => setPoints(Math.max(0, Number(e.target.value) || 0))} aria-label="Points" />
-            pts
-          </label>
-          <button className="icon-btn" title="Move up" disabled={index === 0 || busy} onClick={() => onMove(-1)}>↑</button>
-          <button className="icon-btn" title="Move down" disabled={index === count - 1 || busy} onClick={() => onMove(1)}>↓</button>
-          <button className="icon-btn" title="Regenerate this question" disabled={busy} onClick={() => setRegenOpen((o) => !o)}>↻</button>
-          <button className="icon-btn danger" title="Delete question" disabled={busy} onClick={onDelete}>✕</button>
-        </span>
+    <div
+      className={`qrow${dragging ? " dragging" : ""}${over ? " drag-over" : ""}`}
+      draggable={grabbed}
+      onDragStart={(e) => { e.dataTransfer.effectAllowed = "move"; onDragStart?.(); }}
+      onDragEnter={(e) => { e.preventDefault(); onDragEnter?.(); }}
+      onDragOver={(e) => e.preventDefault()}
+      onDrop={(e) => { e.preventDefault(); onDrop?.(); }}
+      onDragEnd={() => { setGrabbed(false); onDragEnd?.(); }}
+    >
+      {/* ---- left rail: drag grip + number ---- */}
+      <div className="qrail">
+        <button
+          className="qgrip"
+          title="Drag to reorder"
+          aria-label={`Drag question ${index + 1} to reorder`}
+          onMouseDown={() => setGrabbed(true)}
+          onMouseUp={() => setGrabbed(false)}
+          onBlur={() => setGrabbed(false)}
+          disabled={busy}
+        >
+          <IconGripVertical size={18} />
+        </button>
+        <span className="qnum">{index + 1}</span>
       </div>
 
-      {v.status === "warn" && v.note && (
-        <div className="alert alert-warn" style={{ marginTop: 0 }}><b>Accuracy reviewer:</b> {v.note}</div>
-      )}
+      {/* ---- center: meta, prompt, student-facing body ---- */}
+      <div className="qmain">
+        <div className="qcard-head">
+          <span className="chip chip-pill chip-neutral">{questionTypeLabel(q.type)}</span>
+          {v.status === "pass" && <span className="stamp stamp-pass" title="The accuracy check confirmed this answer against your source."><IconCircleCheck size={13} /> Verified</span>}
+          {v.status === "warn" && <span className="stamp stamp-warn" title={v.note}><IconAlertTriangle size={13} /> Check this</span>}
+          <span className="qcard-actions">
+            <label className="small muted" style={{ display: "inline-flex", alignItems: "center", gap: 5 }}>
+              <input className="points-input" type="number" min="0" max="100" value={q.points}
+                onChange={(e) => setPoints(Math.max(0, Number(e.target.value) || 0))} aria-label="Points" />
+              pts
+            </label>
+            <button className="icon-btn" title="Move up" aria-label="Move up" disabled={index === 0 || busy} onClick={() => onMove(-1)}><IconArrowUp size={16} /></button>
+            <button className="icon-btn" title="Move down" aria-label="Move down" disabled={index === count - 1 || busy} onClick={() => onMove(1)}><IconArrowDown size={16} /></button>
+            <button className="icon-btn" title="Regenerate this question" aria-label="Regenerate" disabled={busy} onClick={() => setRegenOpen((o) => !o)}><IconRefresh size={16} /></button>
+            <button className="icon-btn danger" title="Delete question" aria-label="Delete" disabled={busy} onClick={onDelete}><IconX size={16} /></button>
+          </span>
+        </div>
 
-      {regenOpen && (
-        <div className="alert alert-info" style={{ marginTop: 0 }}>
-          <div className="field-label">Regenerate this question from your source</div>
-          <div style={{ display: "flex", gap: 8, flexWrap: "wrap" }}>
-            <input type="text" placeholder="Optional note to steer it — e.g. make it harder, focus on the causes" value={note}
-              onChange={(e) => setNote(e.target.value)} style={{ flex: 1, minWidth: 200 }} />
-            <button className="btn btn-primary btn-sm" disabled={busy} onClick={() => { onRegenerate(note); setRegenOpen(false); setNote(""); }}>
-              {busy ? <><span className="spinner" /> Working…</> : "Regenerate"}
-            </button>
-            <button className="btn btn-sm" onClick={() => setRegenOpen(false)}>Cancel</button>
+        {v.status === "warn" && v.note && (
+          <div className="alert alert-warn" style={{ marginTop: 0 }}><IconAlertTriangle size={17} /> <span><b>Accuracy reviewer:</b> {v.note}</span></div>
+        )}
+
+        {regenOpen && (
+          <div className="alert alert-info" style={{ marginTop: 0, display: "block" }}>
+            <div className="field-label">Regenerate this question from your source</div>
+            <div style={{ display: "flex", gap: 8, flexWrap: "wrap" }}>
+              <input type="text" placeholder="Optional note to steer it — e.g. make it harder, focus on the causes" value={note}
+                onChange={(e) => setNote(e.target.value)} style={{ flex: 1, minWidth: 200 }} />
+              <button className="btn btn-primary btn-sm" disabled={busy} onClick={() => { onRegenerate(note); setRegenOpen(false); setNote(""); }}>
+                {busy ? <><span className="spinner" /> Working…</> : "Regenerate"}
+              </button>
+              <button className="btn btn-sm" onClick={() => setRegenOpen(false)}>Cancel</button>
+            </div>
           </div>
-        </div>
-      )}
+        )}
 
-      {/* Question prompt */}
-      <AutoTextarea
-        value={q.question}
-        onChange={(question) => set({ question })}
-        rows={q.type === "essay" || q.type === "discussion" ? 3 : 2}
-        aria-label="Question text"
-        placeholder={q.type === "fill_blank" ? "Sentence with ______ (six underscores) for each blank" : "Question text…"}
-      />
+        <AutoTextarea
+          className="q-prompt"
+          value={q.question}
+          onChange={(question) => set({ question })}
+          rows={q.type === "essay" || q.type === "discussion" ? 3 : 2}
+          aria-label="Question text"
+          placeholder={q.type === "fill_blank" ? "Sentence with ______ (six underscores) for each blank" : "Question text…"}
+        />
 
-      {/* ---- type-specific bodies ---- */}
-      {q.type === "multiple_choice" && (
-        <div style={{ marginTop: 8 }}>
-          {(q.options || []).map((opt, i) => (
-            <div className="opt-row" key={i}>
-              <input
-                type="radio" name={"correct-" + q.id} checked={q.correctIndex === i}
-                onChange={() => set({ correctIndex: i })}
-                title="Mark as the correct answer"
-              />
-              <span className="opt-letter">{LETTERS[i]}.</span>
-              <input type="text" value={opt} onChange={(e) => {
-                const options = [...q.options]; options[i] = e.target.value; set({ options });
-              }} placeholder={"Option " + LETTERS[i]} />
-              <button className="icon-btn danger" title="Remove option" disabled={q.options.length <= 2}
-                onClick={() => {
-                  const options = q.options.filter((_, j) => j !== i);
-                  let correctIndex = q.correctIndex;
-                  if (correctIndex === i) correctIndex = 0;
-                  else if (correctIndex > i) correctIndex -= 1;
-                  set({ options, correctIndex });
-                }}>✕</button>
-            </div>
-          ))}
-          {(q.options || []).length < 6 && (
-            <button className="btn btn-sm" style={{ marginTop: 4 }} onClick={() => set({ options: [...q.options, ""] })}>+ Add option</button>
-          )}
-          <div className="field-hint">The <span className="redpen">red radio</span> marks the correct answer.</div>
-        </div>
-      )}
-
-      {q.type === "true_false" && (
-        <div className="answer-key">
-          <span className="ak-label">Answer key</span>
-          <label className="check" style={{ margin: "2px 0", display: "inline-flex", marginRight: 18 }}>
-            <input type="radio" name={"tf-" + q.id} checked={q.correctAnswer === true} onChange={() => set({ correctAnswer: true })} />
-            <span>True</span>
-          </label>
-          <label className="check" style={{ margin: "2px 0", display: "inline-flex" }}>
-            <input type="radio" name={"tf-" + q.id} checked={q.correctAnswer === false} onChange={() => set({ correctAnswer: false })} />
-            <span>False</span>
-          </label>
-        </div>
-      )}
-
-      {q.type === "short_answer" && (
-        <div className="answer-key">
-          <span className="ak-label">Answer key — sample answer</span>
-          <AutoTextarea value={q.sampleAnswer} onChange={(sampleAnswer) => set({ sampleAnswer })} rows={2} placeholder="A model answer…" />
-          <span className="ak-label" style={{ marginTop: 8 }}>Must-include points (one per line)</span>
-          <AutoTextarea
-            value={(q.keyPoints || []).join("\n")}
-            onChange={(text) => set({ keyPoints: text.split("\n").map((s) => s.trim()).filter(Boolean) })}
-            rows={2} placeholder={"point 1\npoint 2"}
-          />
-        </div>
-      )}
-
-      {q.type === "essay" && (
-        <div className="answer-key">
-          <span className="ak-label">Answer key — sample response</span>
-          <AutoTextarea value={q.sampleResponse} onChange={(sampleResponse) => set({ sampleResponse })} rows={4} placeholder="A strong model response or outline…" />
-          <span className="ak-label" style={{ marginTop: 8 }}>Rubric</span>
-          {(q.rubric || []).map((r, i) => (
-            <div key={i} style={{ display: "flex", gap: 7, margin: "5px 0", flexWrap: "wrap" }}>
-              <input type="text" value={r.criterion} placeholder="Criterion" style={{ flex: 2, minWidth: 140 }}
-                onChange={(e) => { const rubric = q.rubric.map((x, j) => j === i ? { ...x, criterion: e.target.value } : x); set({ rubric }); }} />
-              <input type="number" className="points-input" value={r.points} min="0" title="Points"
-                onChange={(e) => { const rubric = q.rubric.map((x, j) => j === i ? { ...x, points: Math.max(0, Number(e.target.value) || 0) } : x); set({ rubric }); }} />
-              <input type="text" value={r.description} placeholder="What earns full points" style={{ flex: 3, minWidth: 160 }}
-                onChange={(e) => { const rubric = q.rubric.map((x, j) => j === i ? { ...x, description: e.target.value } : x); set({ rubric }); }} />
-              <button className="icon-btn danger" onClick={() => set({ rubric: q.rubric.filter((_, j) => j !== i) })}>✕</button>
-            </div>
-          ))}
-          <button className="btn btn-sm" onClick={() => set({ rubric: [...(q.rubric || []), { criterion: "", points: 0, description: "" }] })}>+ Add criterion</button>
-          {(q.rubric || []).length > 0 && (
-            <div className="field-hint">Rubric total: {(q.rubric || []).reduce((s, r) => s + (Number(r.points) || 0), 0)} / question points: {q.points}</div>
-          )}
-        </div>
-      )}
-
-      {q.type === "fill_blank" && (
-        <div className="answer-key">
-          <span className="ak-label">Answer key — one answer per blank, in order</span>
-          {(q.answers || []).map((a, i) => (
-            <div key={i} style={{ display: "flex", gap: 7, alignItems: "center", margin: "5px 0" }}>
-              <span className="opt-letter">{i + 1}.</span>
-              <input type="text" value={a} onChange={(e) => { const answers = [...q.answers]; answers[i] = e.target.value; set({ answers }); }} />
-            </div>
-          ))}
-          <div className="field-hint">
-            Blanks found in the question: {(String(q.question).match(/_{3,}/g) || []).length}.
-            {" "}
-            <button className="btn btn-sm" onClick={() => {
-              const blanks = (String(q.question).match(/_{3,}/g) || []).length || 1;
-              const answers = Array.from({ length: blanks }, (_, i) => q.answers?.[i] || "");
-              set({ answers });
-            }}>Match answer slots to blanks</button>
+        {q.type === "multiple_choice" && (
+          <div style={{ marginTop: 10 }}>
+            {(q.options || []).map((opt, i) => (
+              <div className="opt-row" key={i}>
+                <input type="radio" name={"correct-" + q.id} checked={q.correctIndex === i}
+                  onChange={() => set({ correctIndex: i })} title="Mark as the correct answer" />
+                <span className="opt-letter">{LETTERS[i]}.</span>
+                <input type="text" value={opt} onChange={(e) => { const options = [...q.options]; options[i] = e.target.value; set({ options }); }} placeholder={"Option " + LETTERS[i]} />
+                <button className="icon-btn danger" title="Remove option" aria-label="Remove option" disabled={q.options.length <= 2}
+                  onClick={() => {
+                    const options = q.options.filter((_, j) => j !== i);
+                    let correctIndex = q.correctIndex;
+                    if (correctIndex === i) correctIndex = 0;
+                    else if (correctIndex > i) correctIndex -= 1;
+                    set({ options, correctIndex });
+                  }}><IconX size={15} /></button>
+              </div>
+            ))}
+            {(q.options || []).length < 6 && (
+              <button className="btn btn-sm" style={{ marginTop: 6 }} onClick={() => set({ options: [...q.options, ""] })}>+ Add option</button>
+            )}
+            <div className="field-hint">The <span className="redpen">red radio</span> marks the correct answer.</div>
           </div>
-        </div>
-      )}
+        )}
 
-      {q.type === "matching" && (
-        <div className="answer-key">
-          <span className="ak-label">Answer key — correct pairs (the student copy shuffles the right column)</span>
-          {(q.pairs || []).map((p, i) => (
-            <div key={i} style={{ display: "flex", gap: 7, margin: "5px 0", alignItems: "center", flexWrap: "wrap" }}>
-              <input type="text" value={p.left} placeholder="Left item" style={{ flex: 1, minWidth: 130 }}
-                onChange={(e) => { const pairs = q.pairs.map((x, j) => j === i ? { ...x, left: e.target.value } : x); set({ pairs }); }} />
-              <span className="muted">→</span>
-              <input type="text" value={p.right} placeholder="Matches with" style={{ flex: 1, minWidth: 130 }}
-                onChange={(e) => { const pairs = q.pairs.map((x, j) => j === i ? { ...x, right: e.target.value } : x); set({ pairs }); }} />
-              <button className="icon-btn danger" disabled={(q.pairs || []).length <= 2} onClick={() => set({ pairs: q.pairs.filter((_, j) => j !== i) })}>✕</button>
+        {q.type === "matching" && (
+          <div className="answer-key" style={{ marginTop: 12 }}>
+            <span className="ak-label">Answer key — correct pairs (the student copy shuffles the right column)</span>
+            {(q.pairs || []).map((p, i) => (
+              <div key={i} style={{ display: "flex", gap: 7, margin: "5px 0", alignItems: "center", flexWrap: "wrap" }}>
+                <input type="text" value={p.left} placeholder="Left item" style={{ flex: 1, minWidth: 130 }}
+                  onChange={(e) => { const pairs = q.pairs.map((x, j) => j === i ? { ...x, left: e.target.value } : x); set({ pairs }); }} />
+                <IconArrowRight size={16} className="muted" />
+                <input type="text" value={p.right} placeholder="Matches with" style={{ flex: 1, minWidth: 130 }}
+                  onChange={(e) => { const pairs = q.pairs.map((x, j) => j === i ? { ...x, right: e.target.value } : x); set({ pairs }); }} />
+                <button className="icon-btn danger" aria-label="Remove pair" disabled={(q.pairs || []).length <= 2} onClick={() => set({ pairs: q.pairs.filter((_, j) => j !== i) })}><IconX size={15} /></button>
+              </div>
+            ))}
+            {(q.pairs || []).length < 10 && (
+              <button className="btn btn-sm" onClick={() => set({ pairs: [...q.pairs, { left: "", right: "" }] })}>+ Add pair</button>
+            )}
+          </div>
+        )}
+
+        {q.sourceRef ? (
+          <p className="small muted" style={{ margin: "12px 0 0" }}><b style={{ fontWeight: 600 }}>Source:</b> &ldquo;{q.sourceRef}&rdquo;</p>
+        ) : null}
+      </div>
+
+      {/* ---- right margin: the answer key, in red pen ---- */}
+      {hasMargin && (
+        <div className="qmargin">
+          {q.type === "multiple_choice" && (
+            <div className="answer-key">
+              <span className="ak-label">Answer key</span>
+              <p style={{ margin: 0, fontWeight: 600, color: "var(--redpen-ink)" }}>
+                Correct: <span className="redpen">{LETTERS[q.correctIndex] || "?"}</span>
+              </p>
+            </div>
+          )}
+
+          {q.type === "true_false" && (
+            <div className="answer-key">
+              <span className="ak-label">Answer key</span>
+              <label className="check" style={{ margin: "2px 0", display: "inline-flex", marginRight: 18 }}>
+                <input type="radio" name={"tf-" + q.id} checked={q.correctAnswer === true} onChange={() => set({ correctAnswer: true })} />
+                <span>True</span>
+              </label>
+              <label className="check" style={{ margin: "2px 0", display: "inline-flex" }}>
+                <input type="radio" name={"tf-" + q.id} checked={q.correctAnswer === false} onChange={() => set({ correctAnswer: false })} />
+                <span>False</span>
+              </label>
+            </div>
+          )}
+
+          {q.type === "short_answer" && (
+            <div className="answer-key">
+              <span className="ak-label">Answer key — sample answer</span>
+              <AutoTextarea value={q.sampleAnswer} onChange={(sampleAnswer) => set({ sampleAnswer })} rows={2} placeholder="A model answer…" />
+              <span className="ak-label" style={{ marginTop: 8 }}>Must-include points (one per line)</span>
+              <AutoTextarea value={(q.keyPoints || []).join("\n")}
+                onChange={(text) => set({ keyPoints: text.split("\n").map((s) => s.trim()).filter(Boolean) })}
+                rows={2} placeholder={"point 1\npoint 2"} />
+            </div>
+          )}
+
+          {q.type === "essay" && (
+            <div className="answer-key">
+              <span className="ak-label">Answer key — sample response</span>
+              <AutoTextarea value={q.sampleResponse} onChange={(sampleResponse) => set({ sampleResponse })} rows={4} placeholder="A strong model response or outline…" />
+              <span className="ak-label" style={{ marginTop: 8 }}>Rubric</span>
+              {(q.rubric || []).map((r, i) => (
+                <div key={i} style={{ display: "flex", gap: 7, margin: "5px 0", flexWrap: "wrap" }}>
+                  <input type="text" value={r.criterion} placeholder="Criterion" style={{ flex: 2, minWidth: 120 }}
+                    onChange={(e) => { const rubric = q.rubric.map((x, j) => j === i ? { ...x, criterion: e.target.value } : x); set({ rubric }); }} />
+                  <input type="number" className="points-input" value={r.points} min="0" title="Points"
+                    onChange={(e) => { const rubric = q.rubric.map((x, j) => j === i ? { ...x, points: Math.max(0, Number(e.target.value) || 0) } : x); set({ rubric }); }} />
+                  <input type="text" value={r.description} placeholder="What earns full points" style={{ flex: 3, minWidth: 140 }}
+                    onChange={(e) => { const rubric = q.rubric.map((x, j) => j === i ? { ...x, description: e.target.value } : x); set({ rubric }); }} />
+                  <button className="icon-btn danger" aria-label="Remove criterion" onClick={() => set({ rubric: q.rubric.filter((_, j) => j !== i) })}><IconX size={15} /></button>
+                </div>
+              ))}
+              <button className="btn btn-sm" onClick={() => set({ rubric: [...(q.rubric || []), { criterion: "", points: 0, description: "" }] })}>+ Add criterion</button>
+              {(q.rubric || []).length > 0 && (
+                <div className="field-hint">Rubric total: {(q.rubric || []).reduce((s, r) => s + (Number(r.points) || 0), 0)} / question points: {q.points}</div>
+              )}
+            </div>
+          )}
+
+          {q.type === "fill_blank" && (
+            <div className="answer-key">
+              <span className="ak-label">Answer key — one per blank, in order</span>
+              {(q.answers || []).map((a, i) => (
+                <div key={i} style={{ display: "flex", gap: 7, alignItems: "center", margin: "5px 0" }}>
+                  <span className="opt-letter">{i + 1}.</span>
+                  <input type="text" value={a} onChange={(e) => { const answers = [...q.answers]; answers[i] = e.target.value; set({ answers }); }} />
+                </div>
+              ))}
+              <div className="field-hint">
+                Blanks in the question: {(String(q.question).match(/_{3,}/g) || []).length}.{" "}
+                <button className="btn btn-sm" onClick={() => {
+                  const blanks = (String(q.question).match(/_{3,}/g) || []).length || 1;
+                  const answers = Array.from({ length: blanks }, (_, i) => q.answers?.[i] || "");
+                  set({ answers });
+                }}>Match slots to blanks</button>
+              </div>
+            </div>
+          )}
+
+          {q.type === "discussion" && (
+            <div className="answer-key">
+              <span className="ak-label">Facilitator notes — key talking points</span>
+              <AutoTextarea value={(q.talkingPoints || []).join("\n")}
+                onChange={(text) => set({ talkingPoints: text.split("\n").map((s) => s.trim()).filter(Boolean) })} rows={3} />
+              <span className="ak-label" style={{ marginTop: 8 }}>Follow-up questions (one per line)</span>
+              <AutoTextarea value={(q.followUps || []).join("\n")}
+                onChange={(text) => set({ followUps: text.split("\n").map((s) => s.trim()).filter(Boolean) })} rows={2} />
+            </div>
+          )}
+
+          {/* Explanation, present for all types except discussion */}
+          {q.type !== "discussion" && (
+            <div className="answer-key">
+              <span className="ak-label">Explanation (teacher key)</span>
+              <AutoTextarea value={q.explanation} onChange={(explanation) => set({ explanation })} rows={3} placeholder="Why this answer is correct…" />
             </div>
-          ))}
-          {(q.pairs || []).length < 10 && (
-            <button className="btn btn-sm" onClick={() => set({ pairs: [...q.pairs, { left: "", right: "" }] })}>+ Add pair</button>
           )}
         </div>
       )}
-
-      {q.type === "discussion" && (
-        <div className="answer-key">
-          <span className="ak-label">Facilitator notes — key talking points (one per line)</span>
-          <AutoTextarea
-            value={(q.talkingPoints || []).join("\n")}
-            onChange={(text) => set({ talkingPoints: text.split("\n").map((s) => s.trim()).filter(Boolean) })}
-            rows={3}
-          />
-          <span className="ak-label" style={{ marginTop: 8 }}>Follow-up questions (one per line)</span>
-          <AutoTextarea
-            value={(q.followUps || []).join("\n")}
-            onChange={(text) => set({ followUps: text.split("\n").map((s) => s.trim()).filter(Boolean) })}
-            rows={2}
-          />
-        </div>
-      )}
-
-      {/* Explanation + source ref, present for all types */}
-      {q.type !== "discussion" && (
-        <div className="answer-key" style={{ background: "#fff7f5" }}>
-          <span className="ak-label">Explanation (teacher key)</span>
-          <AutoTextarea value={q.explanation} onChange={(explanation) => set({ explanation })} rows={2} placeholder="Why this answer is correct…" />
-        </div>
-      )}
-      {q.sourceRef ? (
-        <p className="small muted" style={{ margin: "9px 0 0" }}>
-          <b>Source:</b> &ldquo;{q.sourceRef}&rdquo;
-        </p>
-      ) : null}
     </div>
   );
 }
diff --git a/components/Sidebar.jsx b/components/Sidebar.jsx
new file mode 100644
index 0000000..8f781ce
--- /dev/null
+++ b/components/Sidebar.jsx
@@ -0,0 +1,124 @@
+"use client";
+// components/Sidebar.jsx — the Open Workspace shell: brand, primary nav, a live
+// library folder tree grouped by subject, and a pinned theme toggle + New button.
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { useCallback, useEffect, useMemo, useState } from "react";
+import {
+  IconPencil, IconPlus, IconSettings, IconMoon, IconSun,
+  IconChevronDown, IconChevronRight, IconFileText, IconPencilPlus,
+} from "@tabler/icons-react";
+import { groupBySubject } from "@/lib/group";
+
+const NAV = [
+  { href: "/", label: "Create", icon: IconPlus },
+  { href: "/settings", label: "Settings", icon: IconSettings },
+];
+
+export default function Sidebar() {
+  const pathname = usePathname();
+  const [theme, setTheme] = useState(null);
+  const [items, setItems] = useState([]);
+  const [collapsed, setCollapsed] = useState({}); // subject -> true when collapsed
+
+  useEffect(() => {
+    setTheme(document.documentElement.dataset.theme === "dark" ? "dark" : "light");
+  }, []);
+
+  const load = useCallback(() => {
+    fetch("/api/assignments")
+      .then((r) => r.json())
+      .then((d) => setItems(d.assignments || []))
+      .catch(() => {});
+  }, []);
+
+  // Reload the tree whenever the route changes (covers create / delete / rename).
+  useEffect(() => { load(); }, [load, pathname]);
+
+  function toggleTheme() {
+    const next = document.documentElement.dataset.theme === "dark" ? "light" : "dark";
+    if (next === "dark") document.documentElement.dataset.theme = "dark";
+    else delete document.documentElement.dataset.theme;
+    try { localStorage.setItem("theme", next); } catch {}
+    setTheme(next);
+  }
+
+  const groups = useMemo(() => groupBySubject(items), [items]);
+  const activeId = pathname.startsWith("/editor/") ? decodeURIComponent(pathname.split("/editor/")[1] || "") : "";
+
+  const isNavActive = (href) => (href === "/" ? pathname === "/" : pathname.startsWith(href));
+
+  return (
+    <aside className="sidebar" aria-label="Sidebar">
+      <Link href="/" className="sidebar-brand">
+        <span className="brand-mark" aria-hidden="true"><IconPencil size={19} stroke={2} /></span>
+        <span>
+          <span className="brand-name" style={{ display: "block" }}>Mr.&nbsp;Drew&rsquo;s</span>
+          <span className="brand-sub">Assignment Creator</span>
+        </span>
+      </Link>
+
+      <nav className="sidebar-nav" aria-label="Main">
+        {NAV.map(({ href, label, icon: Icon }) => (
+          <Link key={href} href={href} className={`navrow${isNavActive(href) ? " active" : ""}`}>
+            <Icon size={19} stroke={2} />
+            <span className="navrow-label">{label}</span>
+          </Link>
+        ))}
+      </nav>
+
+      <div className="sidebar-scroll">
+        <div className="sidebar-label">
+          <span>Library</span>
+          <Link href="/library" className="navrow-label" style={{ fontSize: "0.66rem", color: "var(--board-deep)", fontWeight: 700 }}>
+            All
+          </Link>
+        </div>
+
+        {groups.length === 0 && (
+          <p className="faint" style={{ fontSize: "0.8rem", padding: "4px 10px", margin: 0 }}>
+            No assignments yet.
+          </p>
+        )}
+
+        {groups.map((g) => {
+          const open = !collapsed[g.key];
+          return (
+            <div key={g.key} className="tree-group">
+              <button
+                className="tree-folder"
+                onClick={() => setCollapsed((c) => ({ ...c, [g.key]: open }))}
+                aria-expanded={open}
+              >
+                {open ? <IconChevronDown size={15} className="chev" /> : <IconChevronRight size={15} className="chev" />}
+                <span style={{ overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap" }}>{g.key}</span>
+                <span className="tree-count">{g.items.length}</span>
+              </button>
+              {open && g.items.map((a) => (
+                <Link key={a.id} href={"/editor/" + a.id} className={`tree-leaf${activeId === a.id ? " active" : ""}`} title={a.title}>
+                  <IconFileText size={15} style={{ flex: "none" }} />
+                  <span>{a.title}</span>
+                </Link>
+              ))}
+            </div>
+          );
+        })}
+      </div>
+
+      <div className="sidebar-foot">
+        <button
+          type="button"
+          className="icon-btn theme-toggle"
+          onClick={toggleTheme}
+          aria-label={theme === "dark" ? "Switch to light mode" : "Switch to dark mode"}
+          title={theme === "dark" ? "Switch to light mode" : "Switch to dark mode"}
+        >
+          {theme === "dark" ? <IconSun size={18} /> : <IconMoon size={18} />}
+        </button>
+        <Link href="/" className="btn btn-primary btn-block">
+          <IconPencilPlus size={17} /> <span className="navrow-label">New assignment</span>
+        </Link>
+      </div>
+    </aside>
+  );
+}
diff --git a/lib/group.js b/lib/group.js
new file mode 100644
index 0000000..d34e0c6
--- /dev/null
+++ b/lib/group.js
@@ -0,0 +1,22 @@
+// lib/group.js — group saved assignments by subject for the sidebar tree and
+// the Library page. Shared so both stay in sync.
+
+export function groupBySubject(items) {
+  const map = new Map();
+  for (const a of items || []) {
+    const key = (a.subject && a.subject.trim()) || a.gradeLevel || "Other";
+    if (!map.has(key)) map.set(key, []);
+    map.get(key).push(a);
+  }
+  const groups = [...map.entries()].map(([key, list]) => ({
+    key,
+    items: list.slice().sort((x, y) => String(y.updatedAt || "").localeCompare(String(x.updatedAt || ""))),
+  }));
+  // Stable, friendly order: alphabetical by subject, "Other" last.
+  groups.sort((a, b) => {
+    if (a.key === "Other") return 1;
+    if (b.key === "Other") return -1;
+    return a.key.localeCompare(b.key);
+  });
+  return groups;
+}
diff --git a/package-lock.json b/package-lock.json
index d160d7d..36fccf5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,7 @@
       "name": "mr-drews-assignment-creator",
       "version": "1.0.0",
       "dependencies": {
+        "@tabler/icons-react": "^3.44.0",
         "@tailwindcss/postcss": "^4.3.1",
         "next": "14.2.18",
         "postcss": "^8.5.15",
@@ -242,6 +243,32 @@
         "tslib": "^2.4.0"
       }
     },
+    "node_modules/@tabler/icons": {
+      "version": "3.44.0",
+      "resolved": "https://registry.npmjs.org/@tabler/icons/-/icons-3.44.0.tgz",
+      "integrity": "sha512-Wn0AOZG9sg0L+bjfMqq4eNhC6pQjIrk94LvvWYNYkY8KH8wC3YILRzQlrnVJc4FUeMxH/AK97QsYCX35H3LndA==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/codecalm"
+      }
+    },
+    "node_modules/@tabler/icons-react": {
+      "version": "3.44.0",
+      "resolved": "https://registry.npmjs.org/@tabler/icons-react/-/icons-react-3.44.0.tgz",
+      "integrity": "sha512-8+rvzBbVm/1Z3sG3x7GUNAaxIKxwgz8xaMhRs23nrCnMTKRFAhEC+82zAIFeAA0seXdrAGX5HFCkaLpGK2rVHg==",
+      "license": "MIT",
+      "dependencies": {
+        "@tabler/icons": "3.44.0"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/codecalm"
+      },
+      "peerDependencies": {
+        "react": ">= 16"
+      }
+    },
     "node_modules/@tailwindcss/node": {
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/@tailwindcss/node/-/node-4.3.1.tgz",
diff --git a/package.json b/package.json
index 6cbde9e..16a8df6 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
     "start": "next start"
   },
   "dependencies": {
+    "@tabler/icons-react": "^3.44.0",
     "@tailwindcss/postcss": "^4.3.1",
     "next": "14.2.18",
     "postcss": "^8.5.15",