@font-face {
  font-family: "Workshop Serif"; font-style: normal; font-weight: 400; font-display: swap;
  src: url("fonts/NotoSerifSC-Regular.woff2?v=20260906-5") format("woff2");
}
@font-face {
  font-family: "Workshop Serif"; font-style: normal; font-weight: 600; font-display: swap;
  src: url("fonts/NotoSerifSC-SemiBold.woff2?v=20260906-5") format("woff2");
}
@font-face {
  font-family: "Workshop Serif"; font-style: normal; font-weight: 700; font-display: swap;
  src: url("fonts/NotoSerifSC-Bold.woff2?v=20260906-5") format("woff2");
}

:root {
  --accent: #a43d35;
  --soft: #f6eeea;
  --ink: #262724;
  --muted: #62645e;
  --paper: #ffffff;
  --line: #dedfd8;
  --shadow: none;
  --serif: "Workshop Serif", serif;
  --sans: "Workshop Serif", serif;
  --green: #28614b;
  --green-soft: #edf5ef;
  --red-soft: #faeeeb;
  --wash: #f7f7f3;
  --gold: #896824;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--paper); color: var(--ink); }
body { font-family: var(--sans); font-weight: 400; }
button, select, textarea, a { font-family: inherit; }
h1, h2, h3, p, blockquote, button, .original-text { overflow-wrap: anywhere; }
button:focus-visible, select:focus-visible, textarea:focus-visible, a:focus-visible {
  outline: 3px solid var(--accent); outline-offset: 3px;
}
button { touch-action: manipulation; }
button:disabled { cursor: default; }
h1, h2, h3 { font-family: var(--serif); color: var(--ink); }
a { color: var(--accent); }

/* A compact, editorial course directory. */
.hero { min-height: 0; padding: 28px 5vw 40px; background: var(--paper); border-bottom: 1px solid var(--line); }
.hero::before, .hero::after { display: none; }
nav { color: var(--muted); font-size: 14px; }
nav .brand { color: var(--ink); }
.brand i { background: var(--accent); border-radius: 0; box-shadow: none; }
.copy { display: grid; grid-template-columns: 1.2fr 1fr; gap: 12px 64px; max-width: none; margin: 40px 0 0; }
.copy .kicker { grid-column: 1 / -1; color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: .16em; }
.copy h1 { grid-row: 2 / 4; margin: 0; color: var(--ink); font-size: clamp(44px, 4.6vw, 72px); line-height: 1.35; letter-spacing: -.035em; font-weight: 600; }
.copy h1 em { color: var(--accent); background: none; -webkit-text-fill-color: currentColor; font-style: normal; }
.copy p { margin: 12px 0; align-self: end; color: var(--muted); font-size: 18px; line-height: 1.9; }
.stats { display: flex; gap: 12px 24px; margin: 0; flex-wrap: wrap; align-items: start; }
.stats span { padding: 6px 0; border: 0; border-radius: 0; background: none; font-size: 14px; color: var(--ink); }
.catalogue { padding: 36px 5vw 56px; background: var(--paper); }
.heading { align-items: center; gap: 20px; margin-bottom: 24px; }
.heading h2 { font-size: 34px; color: var(--ink); font-weight: 600; }
.heading > div > span { color: var(--accent); letter-spacing: .12em; }
.heading p { color: var(--muted); }
.catalogue .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0 28px; }
.catalogue .card {
  --accent: #a43d35 !important; --soft: #f6eeea !important;
  min-height: 206px; padding: 22px 4px; border: 0; border-top: 1px solid var(--line);
  border-radius: 0; background: var(--paper); box-shadow: none; transition: background .15s;
}
.catalogue .card:hover { transform: none; background: var(--wash); box-shadow: none; border-color: var(--accent); }
.catalogue .card::after { top: 22px; right: 8px; color: var(--accent); }
.catalogue .week { color: var(--accent); font-size: 13px; letter-spacing: .12em; }
.catalogue .card h2 { margin: 20px 0 14px; font-size: 25px; font-weight: 600; line-height: 1.5; color: var(--ink); }
.catalogue .card p, .catalogue .card > div { color: var(--muted); font-size: 14px; }
.catalogue .card b { padding: 0; border-radius: 0; color: var(--green); background: none; font-weight: 500; }
.catalogue .card b.pending { color: var(--gold); background: none; }
footer { padding: 24px 5vw; border-top: 1px solid var(--line); color: var(--muted); background: var(--paper); }

/* White classroom canvas. The content columns occupy the available stage. */
.deck { display: grid; grid-template-rows: minmax(0, 1fr) 64px; height: 100dvh; background: var(--paper); }
.stage { background: var(--paper); min-height: 0; }
.slide {
  padding: 70px clamp(32px, 3.2vw, 60px) 24px;
  background: var(--paper); color: var(--ink); overflow: auto; touch-action: pan-y;
}
.slide.active, .slide.back.active { display: flex; flex-direction: column; animation: none; }
.slide::before, .slide::after { display: none; }
.slide > * { min-width: 0; }
.topbar {
  top: 18px; left: clamp(32px, 3.2vw, 60px); right: clamp(32px, 3.2vw, 60px);
  gap: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--line);
  color: var(--muted); font-size: 13px; font-weight: 600; letter-spacing: .04em;
}
.deck .brand { color: var(--ink); }
.deck .brand i { width: 8px; height: 16px; border-radius: 0; background: var(--accent); box-shadow: none; }
.chapter-tag { padding: 0; border: 0; border-radius: 0; color: var(--muted); background: none; }
.kicker { margin: 0 0 10px; color: var(--accent); font-size: 14px; font-weight: 700; letter-spacing: .13em; }
.display, .title { color: var(--ink); font-weight: 600; letter-spacing: -.025em; }
.title { font-size: clamp(32px, 3.2vw, 52px); line-height: 1.35; }
.heading-row { flex: none; display: flex; align-items: end; gap: 32px; margin-bottom: 28px; padding-bottom: 20px; border-bottom: 2px solid var(--ink); }
.heading-row > div { min-width: 0; }
.heading-row > p { max-width: 36%; margin: 0 0 3px; color: var(--muted); font-size: 17px; line-height: 1.75; }
.subtitle { color: var(--muted); font-size: clamp(20px, 1.65vw, 27px); line-height: 1.8; }
.slide > .grid-3, .slide > .timeline, .slide > .prompt-layout, .slide > .context-layout,
.slide > .map-grid, .slide > .text-layout, .slide > .vocab-grid, .slide > .focus-layout,
.slide > .activity-layout, .slide > .quiz-grid, .slide > .board, .slide > .exit-layout,
.slide > .source-card { flex: 1 0 auto; }
.grid-3, .quiz-grid, .board { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.card, .timeline .step, .poll-panel, .context-copy, .map-node, .original-card, .vocab-card,
.focus-body, .activity-card, .quiz-card, .exit-form, .source-card {
  border: 0; border-radius: 0; background: transparent; box-shadow: none;
}
.grid-3 .card { display: flex; flex-direction: column; justify-content: center; padding: 24px 26px; background: var(--wash); }
.card .num, .activity-index {
  width: auto; height: auto; display: block; padding: 0; margin: 0 0 28px; border: 0; border-radius: 0;
  color: var(--accent); background: none; font-size: 38px; line-height: 1.2; font-weight: 500;
}
.card h3 { margin-bottom: 20px; font-size: clamp(24px, 2.1vw, 34px); line-height: 1.4; font-weight: 600; }
.card p, .card li, .timeline p, .map-node p, .poll-option, .reading-task p, .activity-card p,
.activity-guide ol, .vocab-card span, .board-col p, .exit-form textarea {
  color: var(--ink); font-size: clamp(18px, 1.45vw, 24px); line-height: 1.8;
}
.card ul { margin: 12px 0 0; padding-left: 24px; }

/* Cover: title and opening question, both substantial. */
.slide.cover.active { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 40px; align-items: stretch; }
.cover-copy { width: auto; max-width: none; margin: 0; display: flex; flex-direction: column; justify-content: center; padding: 12px 20px 24px 0; }
.cover-week { align-self: start; padding: 7px 0; border: 0; border-top: 3px solid var(--accent); border-radius: 0; background: none; color: var(--accent); box-shadow: none; font-size: 18px; letter-spacing: .12em; }
.cover h1 { max-width: none; margin: 30px 0 24px; color: var(--ink); font-size: clamp(54px, 5.6vw, 94px); font-weight: 600; line-height: 1.35; letter-spacing: -.04em; }
.cover h1 span { color: var(--ink); background: none; box-shadow: none; -webkit-text-fill-color: currentColor; }
.cover .subtitle { margin: 0; }
.cover-meta { margin: 34px 0 0; gap: 10px 24px; }
.cover-meta span { padding: 0; border: 0; border-radius: 0; background: none; color: var(--muted); font-size: 15px; font-weight: 400; }
.cover-meta span:last-child { color: var(--green); }
.cover-question {
  display: flex; flex-direction: column; justify-content: center; position: relative; inset: auto; width: auto;
  margin: 26px 0; padding: 38px; border: 0; border-left: 1px solid var(--line); border-radius: 0;
  background: var(--wash); box-shadow: none; backdrop-filter: none;
}
.cover-question small { color: var(--accent); font-size: 16px; font-weight: 600; letter-spacing: .14em; }
.cover-question p { margin: 28px 0 0; color: var(--ink); font-size: clamp(28px, 2.7vw, 44px); line-height: 1.75; font-weight: 500; }

/* Each page type has its own reading rhythm. */
.timeline { gap: 0; grid-template-columns: repeat(5, minmax(0, 1fr)); }
.timeline .step { display: flex; flex-direction: column; justify-content: center; min-height: 0; padding: 28px 24px; border-left: 1px solid var(--line); }
.timeline .step:first-child { border-left: 0; padding-left: 0; }
.timeline .step::before { color: var(--accent); font-size: 48px; font-weight: 400; margin-bottom: 36px; }
.timeline h3 { font-size: clamp(23px, 1.8vw, 29px); font-weight: 600; line-height: 1.5; }
.prompt-layout { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 40px; }
.prompt-card, .focus-mark, .exit-card { border: 0; border-radius: 0; background: var(--wash); color: var(--ink); box-shadow: none; }
.prompt-card { min-height: 0; padding: 32px 38px; border-top: 4px solid var(--accent); }
.prompt-card small { color: var(--accent); opacity: 1; font-size: 15px; font-weight: 600; }
.prompt-card blockquote { margin: 24px 0 0; color: var(--ink); font-size: clamp(28px, 2.75vw, 45px); font-weight: 500; line-height: 1.7; }
.poll-panel { padding: 26px 0 26px 12px; display: flex; flex-direction: column; justify-content: center; }
.poll-panel h3 { font-size: 26px; font-weight: 600; }
.poll-options { gap: 0; }
.poll-option, .quiz-option { border: 0; border-bottom: 1px solid var(--line); border-radius: 0; background: none; color: var(--ink); padding: 20px 12px; line-height: 1.75; }
.poll-option:hover, .quiz-option:not(:disabled):hover { background: var(--soft); color: var(--accent); transform: none; }
.poll-option.selected { background: var(--green-soft); color: var(--green); transform: none; border-color: var(--green); }
.poll-note { min-height: 0; margin: 24px 0 0; padding: 12px 0; border-top: 1px solid var(--line); border-radius: 0; background: none; color: var(--muted); font-size: 17px; line-height: 1.7; }
.checklist .poll-option::before { content: '○'; display: inline-block; width: 1.5em; color: var(--muted); }
.checklist .poll-option.selected::before { content: '✓'; color: var(--green); }
.context-layout { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 48px; }
.context-copy { display: flex; flex-direction: column; justify-content: center; min-height: 0; padding: 26px 36px; background: var(--wash); }
.context-copy p { font-size: clamp(23px, 2vw, 32px); line-height: 1.95; color: var(--ink); }
.context-copy p:last-child { margin-bottom: 0; }
.fact-stack { gap: 0; align-content: stretch; }
.fact { display: flex; flex-direction: column; justify-content: center; padding: 24px 8px; border-bottom: 1px solid var(--line); border-radius: 0; background: none; }
.fact small { color: var(--accent); font-size: 15px; font-weight: 600; }
.fact strong { color: var(--ink); font-size: clamp(21px, 1.7vw, 28px); font-weight: 500; line-height: 1.65; }
.map-grid { gap: 0 24px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.map-node { display: flex; flex-direction: column; justify-content: center; min-height: 0; padding: 22px 12px; border-top: 3px solid var(--accent); }
.map-node span { color: var(--accent); margin-bottom: 30px; font-size: 42px; }
.map-node h3 { font-size: 27px; line-height: 1.6; font-weight: 600; }
.text-layout { grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); gap: 40px; }
.original-card { display: flex; flex-direction: column; min-height: 0; padding: 24px 32px; background: var(--wash); }
.original-card.pending { border: 0; border-left: 3px solid var(--gold); background: var(--wash); }
.original-label { margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--line); color: var(--accent); font-size: 13px; letter-spacing: .02em; font-weight: 500; }
.original-label span { min-width: 0; overflow-wrap: anywhere; }
.original-text { flex: 1; display: flex; flex-direction: column; justify-content: center; font-size: clamp(24px, 2vw, 33px); line-height: 1.85; color: var(--ink); }
.original-text.dense { font-size: clamp(20px, 1.55vw, 26px); line-height: 1.8; }
.original-text .line { min-height: 1.75em; }
.original-text .gap { height: .55em; }
.original-text p { margin-bottom: 16px; }
.reading-task { min-height: 0; padding: 26px 8px 26px 4px; border: 0; border-radius: 0; background: none; }
.reading-task small { color: var(--accent); font-size: 15px; font-weight: 600; }
.reading-task h3 { margin: 24px 0; font-size: clamp(26px, 2.35vw, 38px); line-height: 1.7; font-weight: 500; }
.reading-task p { color: var(--muted); }
.task-tools { gap: 12px; margin-top: 18px; }
.tool-btn, .reveal { min-height: 44px; padding: 10px 18px; border: 1px solid var(--accent); border-radius: 4px; background: var(--paper); color: var(--accent); font-size: 16px; font-weight: 600; box-shadow: none; }
.tool-btn:hover, .reveal:hover { background: var(--soft); }
.status-note { padding: 8px 0; border-radius: 0; color: var(--gold); background: none; font-size: 14px; }
.vocab-grid { gap: 0 40px; }
.vocab-card { min-height: 0; grid-template-columns: minmax(130px, .5fr) 1fr; padding: 28px 16px; border-bottom: 1px solid var(--line); }
.vocab-card strong { color: var(--accent); font-size: 32px; font-weight: 600; }
.focus-layout { grid-template-columns: minmax(0, .85fr) minmax(0, 1.5fr); gap: 40px; }
.focus-mark { min-height: 0; padding: 30px; border-top: 4px solid var(--accent); }
.focus-mark span { font-size: 72px; color: var(--accent); font-weight: 400; opacity: 1; }
.focus-mark h2 { margin: 28px 0 0; color: var(--ink); font-size: clamp(30px, 3.1vw, 48px); font-weight: 500; line-height: 1.5; }
.focus-mark .kicker, .exit-card .kicker { color: var(--accent) !important; opacity: 1 !important; }
.focus-body { min-height: 0; padding: 24px 8px; }
.focus-body p { font-size: clamp(24px, 2vw, 33px); line-height: 1.95; }
.reveal { align-self: flex-start; }
.reveal-panel { margin-top: 24px; padding: 18px 22px; border: 0; border-left: 3px solid var(--green); border-radius: 0; background: var(--green-soft); color: var(--ink); font-size: clamp(18px, 1.4vw, 23px); line-height: 1.8; }
.reveal-panel[hidden] { display: none; }
.activity-layout { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 44px; }
.activity-card { display: flex; flex-direction: column; justify-content: center; min-height: 0; padding: 30px; background: var(--wash); }
.activity-index { margin-bottom: 0; }
.activity-card h2 { margin: 28px 0 22px; font-size: clamp(30px, 2.8vw, 45px); font-weight: 500; line-height: 1.6; }
.activity-guide { display: flex; flex-direction: column; justify-content: center; min-height: 0; padding: 26px 0; border: 0; border-radius: 0; background: none; }
.activity-guide h3 { font-size: 26px; font-weight: 600; }
.activity-guide ol { padding-left: 30px; margin-bottom: 12px; }
.activity-guide li { padding: 9px 0; }
.activity-guide .deliverable { margin-top: 18px; padding: 20px 0; border-top: 2px solid var(--accent); border-radius: 0; background: none; color: var(--ink); font-size: 20px; line-height: 1.75; font-weight: 500; }
.quiz-card { display: flex; flex-direction: column; padding: 8px 10px 18px; border-top: 3px solid var(--accent); }
.quiz-card small { margin-top: 16px; color: var(--accent); font-size: 14px; font-weight: 600; }
.quiz-card h3 { min-height: 0; margin: 16px 0; font-size: clamp(21px, 1.6vw, 26px); font-weight: 600; line-height: 1.6; }
.quiz-options { flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 0; }
.quiz-option { padding: 13px 10px; font-size: clamp(18px, 1.4vw, 23px); }
.quiz-option:disabled { opacity: 1; }
.quiz-option.correct { border-color: var(--green); background: var(--green-soft); color: var(--green); }
.quiz-option.wrong { border-color: var(--accent); background: var(--red-soft); color: var(--accent); }
.quiz-option.correct::after { content: ' ✓'; }
.quiz-option.wrong::after { content: ' ×'; }
.quiz-feedback { min-height: 0; margin: 16px 0 0; color: var(--muted); font-size: clamp(16px, 1.2vw, 20px); line-height: 1.7; }
.quiz-actions { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; flex: none; gap: 12px; padding: 10px 0 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; }
.quiz-reset:disabled { opacity: .45; }
.board { padding: 0; border: 0; border-radius: 0; background: none; box-shadow: none; }
.board-col { display: flex; flex-direction: column; justify-content: center; min-height: 0; padding: 28px; border: 0; border-radius: 0; background: var(--wash); color: var(--ink); }
.board-col small { color: var(--accent); font-size: 15px; font-weight: 600; letter-spacing: .08em; }
.board-col h3 { margin: 30px 0 24px; font-size: clamp(25px, 2vw, 33px); font-weight: 500; line-height: 1.7; }
.board-col p { color: var(--muted); }
.exit-layout { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 44px; }
.exit-card { min-height: 0; padding: 32px; border-top: 4px solid var(--accent); }
.exit-card h2 { color: var(--ink); font-size: clamp(30px, 2.8vw, 45px); font-weight: 500; line-height: 1.7; }
.exit-card p { color: var(--muted); opacity: 1; font-size: 20px; }
.exit-form { display: flex; flex-direction: column; padding: 22px 0; }
.exit-form label { color: var(--accent); margin-bottom: 22px; font-size: 18px; font-weight: 600; }
.exit-form textarea { flex: 1; min-height: 250px; padding: 22px; border: 1px solid var(--line); border-radius: 0; background: var(--paper); color: var(--ink); }
.source-card { display: flex; flex-direction: column; justify-content: center; padding: 18px 32px; background: var(--wash); }
.source-card p { color: var(--ink); font-size: clamp(18px, 1.65vw, 27px); line-height: 1.85; }
.source-card a { color: var(--accent); word-break: break-all; }
.source-card .notice { margin-top: 16px; padding: 20px 0 0; border: 0; border-top: 1px solid var(--line); border-radius: 0; background: none; color: var(--muted); font-size: 18px; line-height: 1.8; }

/* Restrained controls stay available throughout a class. */
.footer { grid-template-columns: auto minmax(0, 1fr) auto; padding: 0 24px; gap: 16px; background: var(--paper); border-top: 1px solid var(--line); box-shadow: none; backdrop-filter: none; }
.nav-btn, .icon-btn, .jump-select { height: 44px; min-height: 44px; border: 1px solid var(--line); border-radius: 4px; background: var(--paper); color: var(--ink); box-shadow: none; }
.nav-btn { padding: 0 16px; font-weight: 500; }
.icon-btn { width: 44px; }
.nav-btn:hover, .icon-btn:hover { border-color: var(--accent); background: var(--soft); color: var(--accent); }
.jump-select { width: min(410px, 38vw); font-weight: 500; font-size: 15px; }
.jump-label { display: none; }
.page-count { color: var(--muted); font-size: 14px; }
.page-count strong { color: var(--accent); font-size: 18px; }
.progress { height: 3px; background: var(--wash); }
.progress i { background: var(--accent); }
.edge { width: 26px; top: 64px; bottom: 64px; }
.edge:hover, .edge.right:hover { background: var(--soft); color: var(--accent); }
.edge:disabled { pointer-events: none; }
.timer-dock { max-width: calc(100vw - 24px); right: 24px; bottom: 82px; padding: 12px; gap: 10px; border: 1px solid var(--line); border-radius: 4px; background: var(--paper); color: var(--ink); box-shadow: 0 4px 20px rgba(38, 39, 36, .12); backdrop-filter: none; }
.timer-dock strong { font-size: 28px; min-width: 80px; }
.timer-dock button { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 4px; background: var(--paper); color: var(--accent); }

@media (max-height: 800px) and (min-width: 981px) {
  .slide { padding-top: 60px; padding-bottom: 18px; }
  .topbar { top: 12px; padding-bottom: 8px; }
  .heading-row { margin-bottom: 20px; padding-bottom: 14px; }
  .title { font-size: 38px; }
  .kicker { margin-bottom: 6px; }
  .cover h1 { font-size: clamp(48px, 5vw, 74px); }
  .cover-question p { font-size: 32px; }
  .quiz-card { padding-top: 0; padding-bottom: 12px; }
  .quiz-card small { margin-top: 12px; }
  .quiz-card h3 { margin: 12px 0; }
  .quiz-option { padding: 10px 8px; }
  .focus-mark span { font-size: 56px; }
  .original-card { padding: 20px 28px; }
  .original-label { margin-bottom: 16px; padding-bottom: 12px; }
  .original-text { font-size: 24px; line-height: 1.75; }
  .original-text.dense { font-size: 20px; line-height: 1.75; }
  .original-text .line { padding-inline-end: .5em; }
  .activity-guide { padding: 16px 0; }
  .activity-guide ol { margin-top: 12px; margin-bottom: 8px; }
  .activity-guide li { padding: 6px 0; }
  .activity-guide .deliverable { margin-top: 12px; padding: 14px 0; }
}
@media (max-width: 1120px) {
  .catalogue .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .slide { padding: 68px 28px 24px; }
  .slide > .grid-3, .slide > .timeline, .slide > .prompt-layout, .slide > .context-layout,
  .slide > .map-grid, .slide > .text-layout, .slide > .vocab-grid, .slide > .focus-layout,
  .slide > .activity-layout, .slide > .quiz-grid, .slide > .board, .slide > .exit-layout,
  .slide > .source-card { flex: 0 0 auto; }
  .topbar { left: 28px; right: 28px; }
  .heading-row { align-items: start; }
  .heading-row > p { max-width: 40%; }
  .slide.cover.active { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .cover-copy { padding: 12px 0; }
  .cover h1 { font-size: clamp(46px, 7vw, 72px); }
  .cover-question { margin: 0; padding: 24px; border-left: 0; border-top: 2px solid var(--accent); }
  .cover-question p { font-size: 28px; margin-top: 14px; }
  .grid-3, .quiz-grid, .board { grid-template-columns: 1fr; gap: 24px; }
  .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  .timeline .step, .timeline .step:first-child { padding: 22px; border: 0; background: var(--wash); }
  .prompt-layout, .context-layout, .text-layout, .focus-layout, .activity-layout, .exit-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .focus-mark { gap: 20px; }
  .focus-mark h2 { margin: 0; }
  .focus-mark span { font-size: 48px; }
  .context-copy p, .focus-body p { font-size: 23px; }
  .vocab-grid { grid-template-columns: minmax(0, 1fr); }
  .vocab-card { grid-template-columns: 130px 1fr; }
  .quiz-options { flex: none; }
  .footer .tool-group .icon-btn { display: inline-flex; }
  .nav-btn { width: 44px; padding: 0; }
  .nav-btn span { display: none; }
  .jump-select { width: min(300px, 32vw); }
}
@media (max-width: 650px) {
  .copy { display: block; margin-top: 28px; }
  .copy h1 { font-size: 40px; margin: 16px 0; }
  .copy p { font-size: 16px; }
  .hero { padding: 22px 22px 30px; }
  .catalogue { padding: 30px 22px; }
  .catalogue .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 18px; }
  .catalogue .card { min-height: 224px; padding: 18px 0; }
  .catalogue .card h2 { font-size: 21px; }
  .catalogue .card > div { align-items: start; gap: 8px; flex-direction: column; }
  .heading { display: block; }
  .deck { grid-template-rows: minmax(0, 1fr) calc(112px + env(safe-area-inset-bottom)); }
  .deck .slide { padding: 62px 20px 24px; }
  .deck .topbar { left: 20px; right: 20px; top: 14px; font-size: 12px; }
  .deck .topbar > span:last-child { display: none; }
  .deck .edge { display: none; }
  .heading-row { display: block; padding-bottom: 16px; margin-bottom: 22px; }
  .heading-row > p { max-width: none; margin: 12px 0 0; font-size: 16px; }
  .title { font-size: 30px; line-height: 1.45; }
  .kicker { font-size: 12px; }
  .cover-week { font-size: 15px; }
  .cover h1 { font-size: clamp(34px, 9.4vw, 54px); margin: 24px 0; line-height: 1.45; line-break: anywhere; }
  .cover-meta { margin-top: 24px; gap: 10px 18px; }
  .cover-meta span { font-size: 13px; }
  .cover-question { padding: 22px; }
  .cover-question p { font-size: 25px; }
  .subtitle { font-size: 20px; }
  .card p, .card li, .timeline p, .map-node p, .poll-option, .reading-task p, .activity-card p,
  .activity-guide ol, .vocab-card span, .board-col p, .exit-form textarea { font-size: 18px; }
  .grid-3 .card, .context-copy, .activity-card, .board-col, .exit-card, .source-card { padding: 24px 20px; }
  .card .num { font-size: 32px; margin-bottom: 18px; }
  .timeline { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .timeline .step::before { font-size: 34px; margin-bottom: 18px; }
  .timeline .step h3 { margin-bottom: 12px; }
  .prompt-card { padding: 24px 20px; }
  .prompt-card blockquote { font-size: 26px; }
  .poll-panel, .reading-task, .focus-body, .activity-guide { padding: 18px 4px; }
  .poll-panel h3 { font-size: 23px; }
  .poll-option { padding: 16px 8px; }
  .original-card { padding: 22px 16px; }
  .original-label { flex-direction: column; align-items: start; gap: 8px; }
  .original-text { font-size: 23px; }
  .original-text.dense { font-size: 20px; }
  .original-text .line { min-height: 1.75em; }
  .reading-task h3, .focus-body p { font-size: 24px; }
  .focus-mark { padding: 24px; }
  .focus-mark h2 { font-size: 30px; }
  .activity-card h2 { font-size: 28px; }
  .activity-guide .deliverable { font-size: 18px; }
  .vocab-card { grid-template-columns: minmax(0, 1fr); gap: 12px; padding: 22px 8px; }
  .vocab-card strong { font-size: 28px; }
  .quiz-card { padding: 4px 4px 22px; }
  .quiz-card h3 { font-size: 22px; }
  .quiz-option { font-size: 18px; padding: 14px 8px; }
  .quiz-feedback { font-size: 17px; }
  .board-col h3 { font-size: 26px; margin: 22px 0; }
  .exit-card h2 { font-size: 28px; }
  .exit-card p { font-size: 18px; }
  .source-card p { font-size: 18px; }
  .source-card .notice { font-size: 16px; }
  .footer { grid-template-columns: 1fr auto; grid-template-rows: 44px 44px; padding: 8px 12px calc(10px + env(safe-area-inset-bottom)); gap: 6px 10px; }
  .jump-group { grid-row: 1; grid-column: 1 / -1; min-width: 0; gap: 12px; }
  .jump-select { width: 0; min-width: 0; flex: 1; }
  .page-count { display: block; min-width: 62px; }
  .nav-group { grid-row: 2; grid-column: 1; }
  .tool-group { grid-row: 2; grid-column: 2; }
  .tool-group .icon-btn { display: inline-flex; width: 44px; }
  .timer-dock { right: 12px; bottom: calc(124px + env(safe-area-inset-bottom)); gap: 8px; padding: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}