/* ============================================================
   STUDY — key takeaways, sections read, resume, notes, glossary
   popovers, review-deck box, quizzes, and the review, dashboard,
   revision-sheet and glossary pages. Loaded after base.css (and
   lesson.css on lesson pages). Theme tokens only.
   ============================================================ */

/* ============================================================
   LESSON AIDS
   ============================================================ */

/* ---------- Key takeaways ---------- */
.takeaways {
  max-width: 68ch; margin: 0 0 clamp(28px, 4vw, 40px);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent) 6%, var(--surface));
}
.takeaways summary {
  display: flex; align-items: center; gap: 12px; padding: 14px 18px;
  cursor: pointer; list-style: none; font: 600 1rem/1.3 var(--font-display);
}
.takeaways summary::-webkit-details-marker { display: none; }
.takeaways summary::before {
  content: "+"; width: 14px; flex: none;
  font: 500 1.15rem/1 var(--font-mono); color: var(--accent-ink, var(--accent));
}
.takeaways[open] summary::before { content: "−"; }
.takeaways summary small {
  margin-left: auto; color: var(--text-faint);
  font: 600 .64rem/1.2 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; text-align: right;
}
.takeaways ul { list-style: disc; display: flex; flex-direction: column; gap: 9px; padding: 0 22px 18px 46px; }
.takeaways li { color: var(--text); font-size: 1rem; line-height: 1.6; }
.takeaways li::marker { color: var(--accent); }
.takeaways code { font-family: var(--font-mono); font-size: .88em; }

/* ---------- Tools row under the lesson meta ---------- */
.lesson-tools { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tool-btn {
  position: relative; display: inline-flex; align-items: center; gap: 7px;
  min-height: 36px; padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text-muted); font-size: .86rem; font-weight: 600;
  transition: color .2s, border-color .2s;
}
.tool-btn:hover { color: var(--text); border-color: var(--accent); }
.tool-btn svg { width: 15px; height: 15px; flex: none; }
.tool-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent, var(--gold)); flex: none; }
.tool-dot[hidden] { display: none; }

/* ---------- Sections read: ticks in the outlines ---------- */
.lesson-toc a.is-read::after,
.mobile-outline a.is-read::after {
  content: "✓"; margin-left: 6px; font-size: .8em; color: var(--accent-ink, var(--accent));
}
.toc-notes {
  display: flex; align-items: center; gap: 8px; width: 100%; margin-top: 18px;
  padding: 9px 13px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text-muted); font-size: .84rem; font-weight: 600; text-align: left;
}
.toc-notes:hover { color: var(--text); border-color: var(--accent); }
.toc-notes svg { width: 15px; height: 15px; flex: none; }
.toc-notes .tool-dot { margin-left: auto; }

/* ---------- Resume bar ---------- */
.resume-bar {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px 14px;
  margin: 0 0 22px; padding: 10px 10px 10px 16px; border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--gold) 45%, var(--border));
  background: color-mix(in srgb, var(--gold) 10%, var(--surface));
  color: var(--text-muted); font-size: .92rem; line-height: 1.4;
}
.resume-bar strong { color: var(--text); }
.resume-actions { display: flex; align-items: center; gap: 4px; }
.resume-close { width: 36px; height: 36px; border-radius: 10px; font-size: 1.25rem; line-height: 1; color: var(--text-muted); }
.resume-close:hover { background: var(--grid-line); color: var(--text); }

/* ---------- Notes panel ---------- */
.notes-panel {
  position: fixed; z-index: 120; top: 84px; right: 16px; bottom: 16px;
  width: min(400px, calc(100vw - 32px));
  display: flex; flex-direction: column;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  box-shadow: 0 30px 80px -30px rgba(12,23,51,.55);
}
.notes-panel[hidden] { display: none; }
.notes-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 16px 14px 12px 18px; border-bottom: 1px solid var(--border);
}
.notes-kicker { color: var(--accent-ink, var(--gold-ink)); font: 600 .64rem/1.2 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; }
.notes-head h2 { margin-top: 5px; font-size: 1.05rem; line-height: 1.25; }
.notes-close { width: 38px; height: 38px; flex: none; font-size: 1.3rem; }
.notes-text {
  flex: 1; min-height: 80px; resize: none; border: 0; outline: 0;
  padding: 16px 18px; background: transparent; color: var(--text);
  font: 400 .98rem/1.6 var(--font-body);
}
.notes-text::placeholder { color: var(--text-faint); }
.notes-text:focus-visible { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--gold) 60%, transparent); }
.notes-foot {
  display: flex; align-items: center; gap: 12px; padding: 10px 18px;
  border-top: 1px solid var(--border); color: var(--text-faint); font-size: .8rem;
}
.notes-count { margin-left: auto; font-family: var(--font-mono); font-size: .72rem; }
.notes-foot a { color: var(--accent-ink, var(--gold-ink)); font-weight: 600; }
[data-theme="dark"] .notes-foot a, [data-theme="dark"] .notes-kicker { color: var(--accent-ink, var(--gold)); }

.notes-fab {
  position: fixed; z-index: 115; left: 16px; bottom: 20px;
  width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border-strong); color: var(--text);
  box-shadow: var(--shadow-card);
}
.notes-fab svg { width: 20px; height: 20px; }
.notes-fab .tool-dot { position: absolute; top: 9px; right: 9px; }
.notes-fab[hidden] { display: none; }
@media (min-width: 1281px) { .notes-fab { display: none; } }

.quote-pill {
  position: absolute; z-index: 130; padding: 8px 14px; border-radius: 999px;
  background: var(--navy-deep); color: var(--cream); border: 1px solid rgba(245,241,234,.18);
  box-shadow: 0 12px 30px -14px rgba(0,0,0,.6); font-size: .84rem; font-weight: 600; white-space: nowrap;
}
.quote-pill[hidden] { display: none; }

/* ---------- Glossary terms + popover ---------- */
.gloss {
  display: inline; padding: 0; border: 0; background: none;
  font: inherit; color: inherit; letter-spacing: inherit; text-align: inherit; cursor: help;
  text-decoration: underline dotted; text-decoration-thickness: 1.5px; text-underline-offset: .22em;
  text-decoration-color: color-mix(in srgb, var(--accent, var(--gold)) 70%, transparent);
}
.gloss:hover, .gloss[aria-expanded="true"] { text-decoration-style: solid; color: var(--accent-ink, var(--accent)); }
.gloss-pop {
  position: fixed; z-index: 125; display: block; width: min(320px, calc(100vw - 16px));
  padding: 14px 16px; border-radius: 14px; text-align: left; white-space: normal;
  background: var(--surface); border: 1px solid var(--border-strong);
  box-shadow: 0 24px 60px -24px rgba(12,23,51,.55);
  color: var(--text-muted); font: 400 .9rem/1.5 var(--font-body); letter-spacing: normal;
}
.gloss-term { display: block; margin-bottom: 4px; color: var(--text); font: 600 .98rem/1.3 var(--font-display); }
.gloss-def { display: block; }
.gloss-def code { font-family: var(--font-mono); font-size: .86em; }
.gloss-links { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 10px; font-size: .82rem; }
.prose .gloss-links a, .gloss-links a { color: var(--accent-ink, var(--gold-ink)); font-weight: 600; text-decoration: none; }
.gloss-links a:hover { text-decoration: underline; }

/* ---------- After "Mark complete" ---------- */
.study-after { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }
.study-after[hidden] { display: none; }
.after-row {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px 16px;
  padding: 14px 18px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-muted); font-size: .92rem; line-height: 1.5;
}
.after-row strong { color: var(--text); }
.after-row a:not(.btn) { color: var(--accent-ink, var(--accent)); text-decoration: underline; text-underline-offset: 2px; }
.after-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.link-btn { padding: 6px 2px; color: var(--text-muted); font-size: .86rem; text-decoration: underline; text-underline-offset: 2px; }
.link-btn:hover { color: var(--text); }

/* ============================================================
   QUICK CHECK (js/quiz.js)
   Right/wrong use the production green and the site's one error
   red, both theme-aware; every state also carries text and a mark,
   never colour alone.
   ============================================================ */
.quiz {
  --good: var(--ac-prod-ink); --bad: var(--danger-ink);
  margin-top: 30px; padding: 26px 28px; border-radius: var(--radius-lg);
  border: 1px solid var(--border); background: var(--surface);
}
.quiz-title { font-size: 1.35rem; }
.quiz-intro { margin: 8px 0 0; color: var(--text-muted); font-size: .98rem; line-height: 1.55; }
.quiz-best { margin: 8px 0 0; color: var(--accent-ink, var(--accent)); font: 600 .72rem/1.4 var(--font-mono); letter-spacing: .05em; }
.quiz-best[hidden] { display: none; }
.quiz-q { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--border); }
.quiz-num {
  display: block; margin-bottom: 8px; color: var(--text-faint);
  font: 600 .64rem/1.2 var(--font-mono); letter-spacing: .14em; text-transform: uppercase;
}
.quiz-stem { margin: 0 0 14px; font-size: 1.05rem; font-weight: 600; line-height: 1.5; }
.prose .quiz-options { display: flex; flex-direction: column; gap: 8px; margin: 0; padding: 0; list-style: none; }
.prose .quiz-options li { margin: 0; padding: 0; }
.quiz-opt {
  display: flex; align-items: flex-start; gap: 12px; width: 100%;
  padding: 12px 14px; border-radius: 12px; text-align: left;
  border: 1px solid var(--border-strong); background: var(--bg); color: var(--text);
  font-size: .98rem; line-height: 1.5; transition: border-color .2s, background .2s, opacity .2s;
}
.quiz-opt:hover:not(:disabled) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, var(--surface)); }
.quiz-opt:disabled { cursor: default; }
.quiz-mark {
  flex: none; width: 22px; height: 22px; margin-top: 1px; border-radius: 50%;
  display: grid; place-items: center; border: 1.5px solid var(--border-strong);
  font-size: .76rem; font-weight: 700; line-height: 1;
}
.quiz-why { display: none; margin: 8px 0 2px 48px; color: var(--text-muted); font-size: .93rem; line-height: 1.55; }
.quiz.is-ready li.is-revealed > .quiz-why { display: block; }
.quiz-q.is-answered li:not(.is-correct):not(.is-chosen) .quiz-opt { opacity: .62; }
.quiz-q.is-answered li:not(.is-correct):not(.is-chosen) > .quiz-why { opacity: .85; }
li.is-correct > .quiz-opt { border-color: var(--good); background: color-mix(in srgb, var(--good) 9%, var(--surface)); }
li.is-correct .quiz-mark { border-color: var(--good); background: var(--good); color: var(--surface); }
li.is-wrong > .quiz-opt { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 8%, var(--surface)); }
li.is-wrong .quiz-mark { border-color: var(--bad); background: var(--bad); color: var(--surface); }
.quiz-verdict { margin: 12px 0 0; font-size: .92rem; font-weight: 700; }
.quiz-verdict[hidden] { display: none; }
.quiz-verdict.is-right { color: var(--good); }
.quiz-verdict.is-off { color: var(--bad); }
.quiz-result {
  margin-top: 26px; padding: 18px 20px; border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
}
.quiz-result[hidden] { display: none; }
.quiz-result p { margin: 0; }
.quiz-score { line-height: 1.5; }
.quiz-score strong { margin-right: 8px; font: 700 1.3rem var(--font-display); }
.quiz-reread { margin: 8px 0 0 !important; color: var(--text-muted); font-size: .95rem; }
.quiz-result .btn { margin-top: 14px; }

@media (max-width: 720px) {
  .quiz { padding: 20px 16px; }
  .quiz-why { margin-left: 34px; }
  .notes-panel { top: auto; left: 8px; right: 8px; bottom: 8px; width: auto; height: min(62vh, 520px); }
  .takeaways ul { padding: 0 16px 16px 38px; }
  .takeaways summary small { display: none; }
}

/* ============================================================
   STUDY PAGES — shared shell (review, My learning, sheet, glossary)
   ============================================================ */
.study-page { min-height: 70vh; }
.study-hero { padding: 128px 0 28px; }
.study-hero h1 { margin-top: 16px; font-size: clamp(2rem, 4.6vw, 3.2rem); letter-spacing: -.03em; }
.study-sub { max-width: 62ch; margin-top: 16px; color: var(--text-muted); font-size: clamp(1rem, 1.4vw, 1.15rem); line-height: 1.6; }
.study-body { padding-bottom: clamp(56px, 8vw, 96px); }
.study-note { margin-top: 6px; color: var(--text-muted); font-size: .95rem; }
.study-body h2 { font-size: clamp(1.35rem, 2.4vw, 1.7rem); }
.study-body kbd {
  font: 600 .68rem var(--font-mono); border: 1px solid var(--border-strong);
  background: var(--surface-2); border-radius: 5px; padding: 1px 6px; color: var(--text-muted);
}
.study-select, .review-scope select {
  min-height: 44px; max-width: 100%; padding: 8px 12px; border-radius: 12px;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  font: 500 .95rem var(--font-body);
}

/* ============================================================
   REVIEW
   ============================================================ */
.review-bar { display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 14px 24px; margin-bottom: 20px; }
.review-scope { display: flex; flex-direction: column; gap: 6px; min-width: min(100%, 320px); }
.review-scope span { color: var(--text-faint); font: 600 .66rem/1.2 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; }
.review-counts { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--text-muted); font-size: .9rem; }
.review-counts b { margin-right: 4px; color: var(--text); font: 600 1.05rem var(--font-display); }

.review-stage { min-height: 320px; }
.review-progress { display: flex; align-items: center; gap: 12px; max-width: 780px; margin-bottom: 14px; color: var(--text-muted); font: 600 .72rem/1.3 var(--font-mono); letter-spacing: .04em; }
.review-progress-bar { flex: 1; min-width: 60px; height: 6px; border-radius: 999px; background: var(--grid-line); overflow: hidden; }
.review-progress-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--gold-deep), var(--gold)); transition: width .3s var(--ease-out); }
.review-mode { color: var(--gold-ink); }
[data-theme="dark"] .review-mode { color: var(--gold); }

.review-card {
  --accent: var(--gold); --accent-ink: var(--gold-ink);
  max-width: 780px; padding: clamp(20px, 3vw, 32px); border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--border); border-top: 4px solid var(--accent);
  box-shadow: var(--shadow-card);
}
.review-card-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 18px; }
.review-chip { color: var(--accent-ink, var(--accent)); font: 600 .74rem/1.3 var(--font-mono); letter-spacing: .03em; }
.review-tag {
  padding: 3px 8px; border-radius: 6px; border: 1px solid var(--border);
  color: var(--text-faint); font: 600 .6rem/1.2 var(--font-mono); letter-spacing: .1em; text-transform: uppercase;
}
.review-tag.is-new { color: var(--gold-ink); border-color: color-mix(in srgb, var(--gold) 55%, var(--border)); }
[data-theme="dark"] .review-tag.is-new { color: var(--gold); }
.review-kind { display: block; margin-bottom: 8px; color: var(--text-faint); font: 600 .64rem/1.2 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; }
.review-front, .review-back { outline: none; }
.review-q { color: var(--text); font: 600 clamp(1.15rem, 2.2vw, 1.4rem)/1.4 var(--font-display); letter-spacing: -.015em; }
.review-prompt { margin-top: 8px; color: var(--text-muted); font-size: .98rem; }
.review-back { margin-top: 22px; padding-top: 20px; border-top: 1px dashed var(--border-strong); color: var(--text); font-size: 1.02rem; line-height: 1.65; }
.review-back p + p { margin-top: 10px; }
.review-back code, .review-q code { padding: 1px 5px; border-radius: 5px; background: var(--grid-line); font-family: var(--font-mono); font-size: .88em; }
.review-actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; margin-top: 26px; }
.review-reveal kbd { margin-left: 4px; color: var(--navy-deep); background: rgba(12,23,51,.08); border-color: rgba(12,23,51,.22); }
.review-open { color: var(--text-muted); font-size: .88rem; text-decoration: underline; text-underline-offset: 3px; }
.review-open:hover { color: var(--text); }
.review-grades { flex: 1 1 420px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.grade {
  display: grid; grid-template-columns: 1fr auto; grid-template-areas: "name key" "when key";
  align-items: center; gap: 0 8px; min-height: 56px; padding: 10px 12px; border-radius: 12px;
  border: 1px solid var(--border-strong); background: var(--bg); color: var(--text); text-align: left;
  transition: border-color .2s, background .2s, transform .2s;
}
.grade:hover { transform: translateY(-1px); }
.grade b { grid-area: name; color: var(--g); font-size: .95rem; }
.grade small { grid-area: when; color: var(--text-muted); font: 500 .72rem var(--font-mono); }
.grade kbd { grid-area: key; }
.grade-again { --g: var(--danger-ink); }
.grade-hard { --g: var(--gold-ink); }
.grade-good { --g: var(--ac-prod-ink); }
.grade-easy { --g: var(--ac-found-ink); }
[data-theme="dark"] .grade-hard { --g: var(--gold); }
.grade:hover, .grade:focus-visible { border-color: var(--g); background: color-mix(in srgb, var(--g) 9%, var(--surface)); }

.review-empty, .review-done {
  max-width: 680px; padding: clamp(22px, 3vw, 34px); border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--border);
}
.review-empty p, .review-done p { margin-top: 10px; color: var(--text-muted); line-height: 1.6; }
.review-empty-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.review-done h2 { outline: none; }
.review-done-stats { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.review-done-stats b { margin-right: 6px; color: var(--text); font: 700 1.6rem var(--font-display); }

.review-help { max-width: 780px; margin-top: 22px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.review-help summary { padding: 14px 18px; cursor: pointer; font-weight: 600; }
.review-help ul { display: flex; flex-direction: column; gap: 6px; padding: 0 22px 0 40px; list-style: disc; color: var(--text-muted); }
.review-help p { padding: 12px 18px 16px; color: var(--text-muted); font-size: .92rem; line-height: 1.7; }
.review-help a, .study-body .text-link { color: var(--gold-ink); text-decoration: underline; text-underline-offset: 2px; }
[data-theme="dark"] .review-help a, [data-theme="dark"] .study-body .text-link { color: var(--gold); }

.review-deck { margin-top: clamp(40px, 6vw, 64px); }
.deck-module { --accent: var(--gold); margin-top: 22px; }
.deck-module h3 { color: var(--accent-ink, var(--accent)); font: 600 .95rem var(--font-mono); letter-spacing: .02em; }
.deck-module ul { margin-top: 8px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.deck-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 4px 16px; padding: 10px 14px 10px 16px; border-top: 1px solid var(--border); }
.deck-row:first-child { border-top: 0; }
.deck-row a { font-weight: 600; }
.deck-row a:hover { color: var(--accent-ink, var(--accent)); }
.deck-meta { color: var(--text-faint); font: 500 .74rem var(--font-mono); }
.deck-toggle {
  min-width: 96px; min-height: 36px; padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--border-strong); color: var(--text-muted); font-size: .84rem; font-weight: 600;
}
.deck-row.is-on .deck-toggle {
  border-color: color-mix(in srgb, var(--accent) 60%, var(--border));
  background: color-mix(in srgb, var(--accent) 8%, var(--surface)); color: var(--accent-ink, var(--accent));
}

@media (max-width: 720px) {
  .study-hero { padding-top: 104px; }
  .review-grades { flex-basis: 100%; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .deck-row { grid-template-columns: minmax(0, 1fr) auto; }
  .deck-meta { grid-column: 1; grid-row: 2; }
  .deck-toggle { grid-column: 2; grid-row: 1 / span 2; }
}

/* ============================================================
   MY LEARNING (js/dashboard.js)
   ============================================================ */
.dash-today { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.dash-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
  padding: 22px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border);
}
.dash-card p { color: var(--text-muted); font-size: .94rem; line-height: 1.5; }
.dash-card .btn { margin-top: auto; }
.dash-kicker { color: var(--text-faint); font: 600 .64rem/1.2 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; }
.dash-big { color: var(--text); font: 700 2.2rem/1.05 var(--font-display); letter-spacing: -.03em; }
.dash-big small { color: var(--text-muted); font-size: .95rem; font-weight: 600; letter-spacing: 0; }
.dash-mini { font-size: .82rem !important; }
.dash-goal-row { display: flex; align-items: center; gap: 14px; }
.dash-ring { width: 72px; height: 72px; flex: none; transform: rotate(-90deg); }
.dash-ring circle { fill: none; stroke-width: 7; }
.dash-ring .ring-bg { stroke: var(--grid-line); }
.dash-ring .ring-fg { stroke: var(--gold); stroke-linecap: round; transition: stroke-dashoffset .6s var(--ease-out); }
.dash-week { display: flex; gap: 6px; margin-top: 4px; }
.dash-day { display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--text-faint); font: 600 .62rem var(--font-mono); }
.dash-day i { width: 22px; height: 22px; border-radius: 7px; border: 1px solid var(--border-strong); }
.dash-day.is-on i { border-color: var(--gold); background: var(--gold); }
.dash-day.is-today { color: var(--text); }

.dash-section { margin-top: clamp(40px, 6vw, 60px); }
.dash-section-head { display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 10px 20px; }
.dash-aside { color: var(--text-muted); font-size: .9rem; }

.dash-next { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 16px; list-style: none; }
.dash-step {
  display: flex; flex-direction: column; gap: 6px; height: 100%; padding: 18px 20px;
  border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
  transition: border-color .2s, transform .25s var(--ease-out);
}
.dash-step:hover { border-color: var(--gold); transform: translateY(-2px); }
.dash-step strong { font: 600 1.05rem/1.3 var(--font-display); }
.dash-step-detail { color: var(--text-muted); font-size: .9rem; line-height: 1.45; }
.dash-step-cta { margin-top: auto; padding-top: 6px; color: var(--gold-ink); font-weight: 700; font-size: .9rem; }
[data-theme="dark"] .dash-step-cta { color: var(--gold); }

.dash-heat { margin-top: 16px; }
.heat-scroll { overflow-x: auto; padding-bottom: 6px; }
.heat-grid { display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 13px); grid-auto-columns: 13px; gap: 3px; width: max-content; }
.heat-grid i, .heat-legend i { display: block; width: 13px; height: 13px; border-radius: 3px; }
.heat-0 { background: var(--grid-line); border: 1px solid var(--border); }
.heat-1 { background: color-mix(in srgb, var(--gold) 28%, var(--surface)); }
.heat-2 { background: color-mix(in srgb, var(--gold) 52%, var(--surface)); }
.heat-3 { background: color-mix(in srgb, var(--gold) 78%, var(--surface)); }
.heat-4 { background: var(--gold-deep); }
.heat-legend { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; margin-top: 10px; color: var(--text-faint); font-size: .76rem; }
.heat-legend span { margin: 0 6px; }
.heat-legend .heat-note { flex-basis: 100%; margin: 4px 0 0; }

.dash-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.dash-tile { padding: 16px 18px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); }
.dash-tile strong { display: block; color: var(--text); font: 700 1.5rem/1.1 var(--font-display); }
.dash-tile span { color: var(--text-muted); font-size: .86rem; }

.dash-formula summary { cursor: pointer; color: var(--text-muted); font-size: .88rem; text-decoration: underline; text-underline-offset: 3px; }
.dash-formula p { max-width: 62ch; margin-top: 8px; color: var(--text-muted); font-size: .9rem; line-height: 1.6; }
.dash-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 14px; color: var(--text-muted); font-size: .8rem; }
.dash-legend span { display: inline-flex; align-items: center; gap: 6px; }
.dash-legend .seg { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.seg-done { background: var(--gold-deep); }
.seg-read { background: var(--ac-found); }
.seg-quiz { background: var(--ac-classic); }
.seg-ret { background: var(--ac-prod); }
.mastery-module { --accent: var(--gold); margin-top: 12px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.mastery-module summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; cursor: pointer; list-style: none; }
.mastery-module summary::-webkit-details-marker { display: none; }
.mastery-mod-title { color: var(--accent-ink, var(--accent)); font: 600 .9rem var(--font-mono); }
.mastery-avg { color: var(--text); font: 700 1.1rem var(--font-display); }
.mastery-module ul { border-top: 1px solid var(--border); }
.mastery-row {
  display: grid; grid-template-columns: minmax(140px, 1.2fr) minmax(120px, 2fr) auto; align-items: center;
  gap: 4px 16px; padding: 10px 18px; border-top: 1px solid var(--border);
}
.mastery-row:first-child { border-top: 0; }
.mastery-row a { font-weight: 600; font-size: .95rem; }
.mastery-row a:hover { color: var(--accent-ink, var(--accent)); }
.mastery-meter { display: flex; height: 10px; border-radius: 999px; background: var(--grid-line); overflow: hidden; }
.mastery-meter .seg { display: block; height: 100%; }
.mastery-score { min-width: 112px; color: var(--text-muted); font-size: .82rem; white-space: nowrap; }
.mastery-score b { color: var(--text); font: 700 1rem var(--font-display); margin-right: 4px; }
.mastery-detail { grid-column: 1 / -1; color: var(--text-faint); font: 500 .72rem var(--font-mono); }

.dash-list { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; list-style: none; }
.dash-list > li:not(.study-note) {
  display: flex; flex-direction: column; gap: 4px; padding: 14px 18px;
  border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border);
}
.dash-list a:hover strong { color: var(--gold-ink); }
[data-theme="dark"] .dash-list a:hover strong { color: var(--gold); }
.dash-list span { color: var(--text-muted); font-size: .92rem; line-height: 1.5; }
.dash-list small { color: var(--text-faint); font: 500 .72rem var(--font-mono); }
.dash-note { white-space: pre-line; }

.dash-sheets { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; margin-top: 14px; }
.dash-sheet {
  --accent: var(--gold); display: flex; flex-direction: column; gap: 4px; padding: 14px 16px;
  border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent);
}
.dash-sheet span { color: var(--accent-ink, var(--accent)); font: 600 .7rem var(--font-mono); }
.dash-sheet strong { font-size: .95rem; }
.dash-sheet:hover { border-color: var(--accent); }

.dash-settings { display: flex; flex-wrap: wrap; gap: 14px 24px; margin-top: 14px; }
.dash-field { display: flex; flex-direction: column; gap: 6px; }
.dash-field span { color: var(--text-faint); font: 600 .66rem/1.2 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; }
.dash-data { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0 6px; }
.dash-import { cursor: pointer; }
.dash-import:focus-within { outline: 2px solid var(--gold); outline-offset: 3px; }

@media (max-width: 900px) {
  .dash-today, .dash-next { grid-template-columns: minmax(0, 1fr); }
  .dash-tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .mastery-row { grid-template-columns: minmax(0, 1fr) auto; }
  .mastery-meter { grid-column: 1 / -1; grid-row: 2; }
  .mastery-detail { grid-row: 3; }
  .dash-big { font-size: 1.9rem; }
}

/* ============================================================
   REVISION SHEET (js/sheet.js) — screen and print
   ============================================================ */
.sheet-hero .eyebrow a { text-decoration: underline; text-underline-offset: 3px; }
.sheet-controls { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px 20px; margin-top: 20px; }
.sheet-check { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; color: var(--text-muted); font-size: .95rem; cursor: pointer; }
.sheet-check input { width: 18px; height: 18px; accent-color: var(--gold-deep); }
.sheet { --accent: var(--gold); max-width: 860px; }
.sheet-lesson { padding: 26px 0; border-top: 1px solid var(--border); break-inside: avoid-page; }
.sheet-lesson:first-child { border-top: 0; padding-top: 0; }
.sheet-lesson h2 { display: flex; align-items: baseline; gap: 12px; font-size: 1.45rem; }
.sheet-lesson h2 span { color: var(--accent-ink, var(--accent)); font: 600 .85rem var(--font-mono); }
.sheet-lesson h2 a:hover { color: var(--accent-ink, var(--accent)); }
.sheet-lesson h3 { margin: 18px 0 8px; color: var(--text-faint); font: 600 .68rem/1.2 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; }
.sheet-takeaways { display: flex; flex-direction: column; gap: 6px; padding-left: 20px; list-style: disc; }
.sheet-takeaways li::marker { color: var(--accent); }
.sheet-pitfalls dt { margin-top: 10px; font-weight: 700; }
.sheet-pitfalls dd { margin-top: 4px; color: var(--text-muted); font-size: .95rem; line-height: 1.55; }
.sheet-pitfalls dd p + p { margin-top: 4px; }
.sheet-qa { display: flex; flex-direction: column; gap: 10px; padding-left: 22px; list-style: decimal; }
.sheet-q { font-weight: 600; }
.sheet-q small { color: var(--text-faint); font: 600 .62rem var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.sheet-a { display: block; margin-top: 4px; color: var(--text-muted); font-size: .95rem; line-height: 1.55; }
.sheet code { padding: 0 4px; border-radius: 4px; background: var(--grid-line); font-family: var(--font-mono); font-size: .88em; }

/* ============================================================
   GLOSSARY PAGE (js/glossary-page.js)
   ============================================================ */
.gloss-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; }
.gloss-search input { width: min(420px, 100%); }
.gloss-search { flex: 1 1 260px; max-width: 420px; }
.gloss-letters {
  position: sticky; top: 76px; z-index: 5; display: flex; gap: 4px; margin: 18px 0 8px; padding: 8px 0;
  overflow-x: auto; scrollbar-width: none; background: var(--bg);
}
.gloss-letters::-webkit-scrollbar { display: none; }
.gloss-letters a { flex: none; min-width: 32px; padding: 4px 8px; border-radius: 8px; text-align: center; color: var(--text-muted); font: 600 .82rem var(--font-mono); }
.gloss-letters a:hover { background: var(--grid-line); color: var(--text); }
.gloss-group { scroll-margin-top: 140px; margin-top: 22px; }
.gloss-group h2 { color: var(--gold-ink); font: 700 1.2rem var(--font-mono); }
[data-theme="dark"] .gloss-group h2 { color: var(--gold); }
.gloss-entry { scroll-margin-top: 150px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.gloss-entry:target { margin: 0 -14px; padding: 14px; border-radius: var(--radius-sm); background: color-mix(in srgb, var(--gold) 12%, var(--surface)); }
.gloss-entry dt { font: 600 1.05rem/1.3 var(--font-display); }
.gloss-entry dt small { margin-left: 6px; color: var(--text-faint); font: 500 .76rem var(--font-body); }
.gloss-entry dd { max-width: 70ch; margin-top: 4px; color: var(--text-muted); line-height: 1.6; }
.gloss-entry dd code { font-family: var(--font-mono); font-size: .88em; }
.gloss-taught { display: block; margin-top: 4px; color: var(--text-faint); font-size: .84rem; }
.gloss-where { color: var(--gold-ink); font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
[data-theme="dark"] .gloss-where { color: var(--gold); }

/* ============================================================
   PRINT — revision sheets (and any study page) print as plain
   black on white, without the site chrome.
   ============================================================ */
@media print {
  .nav, .footer, .skip-link, .toast-region, .sheet-controls, .notes-fab, .quote-pill, .study-hero .eyebrow { display: none !important; }
  body, .sheet, .sheet-lesson { background: #fff !important; color: #000 !important; }
  .study-hero { padding: 0 0 12px; }
  .sheet-lesson { border-color: #bbb; }
  .sheet-lesson h3, .sheet-q small { color: #555 !important; }
  .sheet-pitfalls dd, .sheet-a { color: #222 !important; }
  .sheet-lesson h2 a { color: #000; text-decoration: none; }
  .wrap { max-width: none; padding: 0; }
}