:root {
  --ink: #132026;
  --ink-soft: #43535a;
  --paper: #fbf8f2;
  --paper-deep: #f2ece3;
  --panel: #ffffff;
  --red: #c9273c;
  --red-dark: #8f1d2f;
  --red-soft: #f8dfe2;
  --teal: #167b82;
  --teal-dark: #0f535a;
  --teal-soft: #dcefee;
  --gold: #e7a400;
  --gold-soft: #fff1c9;
  --line: #e1d8ce;
  --line-dark: #c8bbae;
  --shadow: 0 16px 38px rgba(19, 32, 38, 0.08);
  --shadow-small: 0 8px 20px rgba(19, 32, 38, 0.07);
  --radius: 8px;
  --max: 1220px;
  font-family: "Avenir Next", "PingFang HK", "PingFang TC", "Noto Sans CJK TC", "Noto Sans TC", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
}

button, a { font: inherit; }

button { color: inherit; }

a { color: inherit; }

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 76px;
  padding: 13px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(200, 187, 174, .72);
  background: rgba(251, 248, 242, .96);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 240px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--red);
}

.brand-mark img { width: 45px; height: 45px; object-fit: contain; }

.brand strong, .brand small { display: block; }

.brand strong { font-size: 17px; line-height: 1.2; letter-spacing: .02em; }

.brand small { margin-top: 4px; color: var(--ink-soft); font-size: 11px; }

.topnav { display: flex; align-items: center; gap: 24px; }

.topnav a {
  position: relative;
  padding: 9px 0;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.topnav a::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  background: var(--red);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .2s ease;
}

.topnav a:hover, .topnav a.is-active { color: var(--red-dark); }

.topnav a:hover::after, .topnav a.is-active::after { transform: scaleX(1); transform-origin: left; }

.mobile-menu { display: none; border: 0; background: transparent; font-size: 22px; cursor: pointer; }

#app { min-height: calc(100vh - 150px); }

.page-shell { width: min(100% - 36px, var(--max)); margin: 0 auto; padding: 36px 0 72px; }

.dashboard-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  min-height: 354px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.dashboard-hero::before, .lesson-hero::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 12px;
  height: 100%;
  background: var(--red);
  content: "";
}

.hero-copy { display: flex; flex-direction: column; justify-content: center; padding: 48px clamp(26px, 5vw, 72px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--red-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.eyebrow::before { width: 28px; height: 2px; background: currentColor; content: ""; }

h1, h2, h3, p { margin-top: 0; }

.hero-copy h1 { max-width: 640px; margin: 15px 0 14px; font-size: clamp(36px, 5vw, 64px); line-height: 1.02; letter-spacing: .01em; }

.hero-copy p { max-width: 610px; margin-bottom: 26px; color: var(--ink-soft); font-size: 17px; }

.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }

.primary-button, .secondary-button, .text-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 43px;
  padding: 10px 16px;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.primary-button { border: 1px solid var(--red); background: var(--red); color: white; box-shadow: 0 8px 16px rgba(201, 39, 60, .2); }
.primary-button:hover { background: var(--red-dark); box-shadow: 0 10px 20px rgba(201, 39, 60, .28); transform: translateY(-1px); }
.secondary-button { border: 1px solid var(--line-dark); background: var(--panel); color: var(--ink); }
.secondary-button:hover { border-color: var(--teal); background: var(--teal-soft); transform: translateY(-1px); }
.text-button { min-height: auto; padding: 5px 0; border: 0; background: transparent; color: var(--red-dark); }
.text-button:hover { color: var(--teal-dark); }

.hero-fact { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-soft); font-size: 13px; font-weight: 700; }
.hero-fact::before { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); content: ""; }

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: var(--red);
}

.hero-visual::before, .hero-visual::after {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, .28);
  content: "";
  transform: rotate(45deg);
}

.hero-visual::before { width: 230px; height: 230px; }
.hero-visual::after { width: 320px; height: 320px; }

.hero-badge {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 185px;
  height: 185px;
  border: 12px solid rgba(255, 255, 255, .16);
  border-radius: 50%;
}

.hero-badge img { width: 148px; height: 148px; object-fit: contain; filter: drop-shadow(0 14px 14px rgba(87, 19, 30, .28)); }

.hero-visual-note {
  position: absolute;
  right: 22px;
  bottom: 18px;
  left: 22px;
  z-index: 1;
  padding: 9px 11px;
  border-top: 1px solid rgba(255, 255, 255, .36);
  color: white;
  font-size: 12px;
  font-weight: 700;
}

.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin: 24px 0 40px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); box-shadow: var(--shadow-small); }

.stat { padding: 20px 22px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat-label { display: block; color: var(--ink-soft); font-size: 12px; font-weight: 700; }
.stat-value { display: block; margin-top: 5px; font-size: 25px; font-weight: 900; line-height: 1.15; }
.stat-value span { color: var(--red); }

.section-block { margin-top: 42px; }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.section-heading h2 { margin: 5px 0 0; font-size: 29px; line-height: 1.12; }
.section-heading p { max-width: 560px; margin: 0; color: var(--ink-soft); font-size: 14px; }

.section-kicker { color: var(--teal-dark); font-size: 12px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }

.day-tabs { display: flex; gap: 8px; margin-bottom: 18px; overflow-x: auto; }
.day-tab { flex: 1; min-width: 180px; padding: 15px 18px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); text-align: left; cursor: pointer; }
.day-tab strong, .day-tab small { display: block; }
.day-tab strong { font-size: 15px; }
.day-tab small { margin-top: 4px; color: var(--ink-soft); font-size: 12px; }
.day-tab:hover { border-color: var(--teal); }
.day-tab.is-active { border-color: var(--red); background: var(--red); color: white; box-shadow: 0 8px 16px rgba(201, 39, 60, .2); }
.day-tab.is-active small { color: rgba(255, 255, 255, .78); }

.lesson-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }

.lesson-card { position: relative; display: flex; flex-direction: column; min-height: 292px; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); box-shadow: var(--shadow-small); }
.lesson-card::before { width: 100%; height: 7px; background: var(--teal); content: ""; }
.lesson-card.tone-red::before { background: var(--red); }
.lesson-card.tone-gold::before { background: var(--gold); }
.lesson-card-body { display: flex; flex: 1; flex-direction: column; padding: 22px; }
.lesson-card-meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; color: var(--ink-soft); font-size: 12px; font-weight: 800; }
.lesson-card h3 { margin: 16px 0 10px; font-size: 23px; line-height: 1.2; }
.lesson-card p { margin: 0 0 18px; color: var(--ink-soft); font-size: 14px; }
.lesson-card-bottom { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: auto; }
.lesson-status { color: var(--teal-dark); font-size: 12px; font-weight: 800; }
.lesson-status.is-done { color: var(--teal); }
.lesson-status.is-done::before { margin-right: 6px; content: "✓"; }
.lesson-card .primary-button { min-height: 37px; padding: 8px 12px; font-size: 12px; }

.requirements-band { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding: 22px; border: 1px solid var(--line); border-radius: 8px; background: var(--ink); color: white; }
.requirements-band h3 { margin-bottom: 8px; font-size: 18px; }
.requirements-band p { margin: 0; color: #dbe4e5; font-size: 13px; }
.requirement-chips { display: flex; align-items: center; justify-content: end; flex-wrap: wrap; gap: 7px; }
.requirement-chip { padding: 7px 9px; border: 1px solid rgba(255,255,255,.25); border-radius: 4px; color: #fff7df; font-size: 12px; font-weight: 800; }

.skill-summary { display: flex; align-items: center; gap: 16px; margin-bottom: 15px; padding: 15px 17px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.skill-summary-number strong { display: block; font-size: 22px; line-height: 1; }
.skill-summary-number strong span { color: var(--red); }
.skill-summary-number small { display: block; margin-top: 4px; color: var(--ink-soft); font-size: 11px; font-weight: 800; white-space: nowrap; }
.skill-summary .progress-track { height: 9px; }
.skill-summary-label { color: var(--teal-dark); font-size: 13px; font-weight: 900; }
.skill-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.skill-card { display: flex; flex-direction: column; min-height: 190px; padding: 16px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.skill-card.is-done { border-color: var(--teal); background: var(--teal-soft); }
.skill-card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.skill-number { display: grid; place-items: center; width: 27px; height: 27px; border-radius: 50%; background: var(--ink); color: white; font-size: 12px; font-weight: 900; }
.skill-card-status { color: var(--teal-dark); font-size: 11px; font-weight: 900; }
.skill-card h3 { margin: 14px 0 7px; font-size: 16px; line-height: 1.25; }
.skill-card p { margin: 0; color: var(--ink-soft); font-size: 12px; }
.skill-card-footer { display: flex; align-items: end; justify-content: space-between; gap: 8px; margin-top: auto; padding-top: 14px; color: var(--ink-soft); font-size: 10px; }
.skill-card-footer a { color: var(--red-dark); font-size: 11px; font-weight: 900; text-decoration: none; white-space: nowrap; }
.skill-card-footer a:hover { text-decoration: underline; }

.resource-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.resource-card { display: flex; flex-direction: column; min-height: 132px; padding: 17px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.resource-card:hover { border-color: var(--teal); box-shadow: var(--shadow-small); }
.resource-type { color: var(--teal-dark); font-size: 11px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.resource-card strong { display: block; margin: 9px 0 12px; font-size: 14px; line-height: 1.35; }
.resource-card a { margin-top: auto; color: var(--red-dark); font-size: 12px; font-weight: 800; text-decoration: none; }
.resource-card a:hover { text-decoration: underline; }

.lesson-crumbs { display: flex; align-items: center; gap: 8px; margin-bottom: 18px; color: var(--ink-soft); font-size: 13px; }
.lesson-crumbs a { color: var(--red-dark); font-weight: 800; text-decoration: none; }

.lesson-hero { position: relative; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); min-height: 310px; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); box-shadow: var(--shadow); }
.lesson-hero.tone-teal::before { background: var(--teal); }
.lesson-hero.tone-gold::before { background: var(--gold); }
.lesson-hero-copy { padding: 44px clamp(24px, 5vw, 62px); }
.lesson-hero-copy h1 { max-width: 680px; margin: 14px 0 14px; font-size: clamp(32px, 4.2vw, 53px); line-height: 1.04; }
.lesson-hero-copy p { max-width: 650px; margin-bottom: 20px; color: var(--ink-soft); font-size: 16px; }
.lesson-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.meta-pill { padding: 6px 9px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink-soft); font-size: 12px; font-weight: 800; }
.meta-pill.accent { border-color: var(--gold); background: var(--gold-soft); color: #745100; }
.lesson-visual { display: grid; place-items: center; padding: 26px; background: var(--teal-soft); }
.tone-red .lesson-visual { background: var(--red-soft); }
.tone-gold .lesson-visual { background: var(--gold-soft); }
.lesson-visual-inner { display: grid; place-items: center; width: 210px; height: 210px; border: 1px solid rgba(19,32,38,.16); border-radius: 50%; background: rgba(255,255,255,.55); }
.lesson-visual-inner img { width: 128px; height: 128px; object-fit: contain; }
.lesson-visual-label { position: absolute; max-width: 180px; margin-top: 236px; color: var(--ink-soft); font-size: 12px; font-weight: 800; text-align: center; }

.back-link { display: inline-flex; align-items: center; gap: 7px; color: var(--ink-soft); font-size: 13px; font-weight: 800; text-decoration: none; }
.back-link:hover { color: var(--red-dark); }

.lesson-nav { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 18px 0 32px; }
.lesson-nav a { max-width: 44%; color: var(--ink-soft); font-size: 13px; font-weight: 800; text-decoration: none; }
.lesson-nav a:hover { color: var(--red-dark); }
.lesson-nav a.next { text-align: right; }

.objectives-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.objective-card { padding: 18px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.objective-number { display: grid; place-items: center; width: 28px; height: 28px; margin-bottom: 13px; border-radius: 50%; background: var(--ink); color: white; font-size: 12px; font-weight: 900; }
.objective-card p { margin: 0; font-size: 14px; font-weight: 700; }

.case-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .9fr); gap: 28px; padding: clamp(23px, 4vw, 38px); border-radius: 8px; background: var(--ink); color: white; }
.case-panel .eyebrow { color: #ffc94a; }
.case-panel h2 { max-width: 560px; margin: 14px 0 12px; font-size: clamp(26px, 3.5vw, 40px); line-height: 1.08; }
.case-panel p { max-width: 590px; margin: 0; color: #dbe4e5; font-size: 15px; }
.choice-list { display: grid; gap: 9px; align-content: center; }
.choice-button { position: relative; display: flex; align-items: flex-start; gap: 10px; padding: 13px 14px; border: 1px solid rgba(255,255,255,.24); border-radius: 5px; background: rgba(255,255,255,.08); color: white; font-size: 13px; font-weight: 700; text-align: left; cursor: pointer; }
.choice-button::before { flex: 0 0 auto; width: 19px; height: 19px; border: 1px solid rgba(255,255,255,.55); border-radius: 50%; content: ""; }
.choice-button:hover, .choice-button.is-selected { border-color: #ffc94a; background: rgba(255,201,74,.15); }
.choice-button.is-selected::before { border-color: #ffc94a; background: #ffc94a; box-shadow: inset 0 0 0 4px var(--ink); }
.choice-feedback { min-height: 42px; margin-top: 10px; padding: 10px 12px; border-left: 3px solid #ffc94a; color: #fff3c4; font-size: 13px; }

.flow-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.flow-item { min-height: 138px; padding: 15px; border-top: 3px solid var(--teal); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); border-left: 1px solid var(--line); border-radius: 5px; background: var(--panel); }
.flow-item:nth-child(3n+1) { border-top-color: var(--red); }
.flow-item:nth-child(3n) { border-top-color: var(--gold); }
.flow-time { color: var(--ink-soft); font-size: 11px; font-weight: 900; letter-spacing: .05em; }
.flow-item h3 { margin: 9px 0 6px; font-size: 15px; }
.flow-item p { margin: 0; color: var(--ink-soft); font-size: 13px; }

.concept-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; }
.concept-card { padding: 19px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.concept-icon { display: inline-grid; place-items: center; min-width: 42px; height: 32px; margin-bottom: 14px; padding: 0 8px; border-radius: 4px; background: var(--teal); color: white; font-size: 11px; font-weight: 900; letter-spacing: .04em; }
.concept-card:nth-child(2) .concept-icon { background: var(--red); }
.concept-card:nth-child(3) .concept-icon { background: var(--gold); color: #5f4300; }
.concept-card h3 { margin-bottom: 8px; font-size: 18px; }
.concept-card p { margin: 0; color: var(--ink-soft); font-size: 13px; }

.mission-panel { display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr); gap: 22px; padding: 26px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); box-shadow: var(--shadow-small); }
.mission-copy h2 { margin-bottom: 9px; font-size: 26px; }
.mission-copy > p { margin-bottom: 18px; color: var(--ink-soft); font-size: 14px; }
.mission-steps { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.mission-step { display: flex; align-items: flex-start; gap: 10px; color: var(--ink-soft); font-size: 13px; }
.mission-step::before { flex: 0 0 auto; display: grid; place-items: center; width: 21px; height: 21px; border: 1px solid var(--line-dark); border-radius: 50%; color: var(--red-dark); content: "→"; font-size: 12px; font-weight: 900; }
.mission-step.is-done { color: var(--ink); font-weight: 700; }
.mission-step.is-done::before { border-color: var(--teal); background: var(--teal); color: white; content: "✓"; }
.lab-panel { padding: 21px; border-radius: 6px; background: var(--paper-deep); }
.lab-panel h3 { margin-bottom: 6px; font-size: 17px; }
.lab-note { margin: 0 0 15px; color: var(--ink-soft); font-size: 12px; }
.lab-checks { display: grid; gap: 9px; }
.lab-check { display: flex; align-items: flex-start; gap: 10px; padding: 11px 12px; border: 1px solid var(--line); border-radius: 5px; background: var(--panel); cursor: pointer; }
.lab-check input { flex: 0 0 auto; width: 18px; height: 18px; margin: 1px 0 0; accent-color: var(--teal); }
.lab-check span { font-size: 13px; }
.lab-check.is-done { border-color: var(--teal); background: var(--teal-soft); }
.lab-progress { display: flex; align-items: center; gap: 10px; margin-top: 14px; color: var(--ink-soft); font-size: 12px; font-weight: 800; }
.progress-track { flex: 1; height: 7px; overflow: hidden; border-radius: 99px; background: #d5cec5; }
.progress-track span { display: block; height: 100%; background: var(--teal); transition: width .2s ease; }

.toggle-lab { display: grid; gap: 10px; }
.toggle-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px; border: 1px solid var(--line); border-radius: 5px; background: var(--panel); }
.toggle-row strong { font-size: 13px; }
.toggle-row small { display: block; margin-top: 3px; color: var(--ink-soft); font-size: 11px; }
.switch { position: relative; width: 46px; height: 26px; border: 0; border-radius: 99px; background: #c8c0b6; cursor: pointer; }
.switch::after { position: absolute; top: 4px; left: 4px; width: 18px; height: 18px; border-radius: 50%; background: white; content: ""; transition: transform .2s ease; }
.switch[aria-pressed="true"] { background: var(--teal); }
.switch[aria-pressed="true"]::after { transform: translateX(20px); }
.visibility-panel { display: grid; gap: 9px; margin-top: 14px; }
.visibility-row { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-radius: 4px; background: var(--panel); color: var(--ink-soft); font-size: 12px; }
.visibility-row strong { color: var(--ink); font-size: 12px; }
.visibility-status { color: var(--red-dark); font-size: 11px; font-weight: 900; }
.visibility-status.safe { color: var(--teal-dark); }

.sequence-lab { display: grid; gap: 12px; }
.sequence-status { padding: 11px 12px; border-left: 3px solid var(--gold); background: var(--gold-soft); color: #664900; font-size: 13px; font-weight: 700; }
.sequence-buttons { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.sequence-button { min-height: 48px; padding: 9px; border: 1px solid var(--line); border-radius: 5px; background: var(--panel); font-size: 12px; font-weight: 800; cursor: pointer; }
.sequence-button:hover:not(:disabled) { border-color: var(--teal); background: var(--teal-soft); }
.sequence-button:disabled { opacity: .45; cursor: not-allowed; }
.sequence-button.is-picked { border-color: var(--teal); background: var(--teal); color: white; }
.sequence-list { display: grid; gap: 6px; padding: 0; margin: 0; list-style: none; }
.sequence-list li { display: flex; align-items: center; gap: 8px; color: var(--ink-soft); font-size: 12px; }
.sequence-list li::before { display: grid; place-items: center; width: 19px; height: 19px; border: 1px solid var(--line-dark); border-radius: 50%; color: var(--ink-soft); content: attr(data-number); font-size: 10px; font-weight: 900; }
.sequence-list li.is-done::before { border-color: var(--teal); background: var(--teal); color: white; content: "✓"; }

.quiz-panel { padding: 26px; border: 1px solid var(--line); border-radius: 8px; background: var(--ink); color: white; }
.quiz-panel .section-kicker { color: #ffc94a; }
.quiz-panel h2 { margin: 7px 0 8px; font-size: 27px; }
.quiz-intro { margin-bottom: 22px; color: #dbe4e5; font-size: 13px; }
.question-list { display: grid; gap: 14px; }
.question-card { padding: 17px; border: 1px solid rgba(255,255,255,.17); border-radius: 6px; background: rgba(255,255,255,.06); }
.question-card p { margin-bottom: 12px; color: white; font-size: 14px; font-weight: 800; }
.answer-options { display: grid; gap: 7px; }
.answer-option { display: flex; align-items: flex-start; gap: 9px; padding: 9px 10px; border-radius: 4px; color: #dbe4e5; font-size: 13px; cursor: pointer; }
.answer-option:hover { background: rgba(255,255,255,.08); }
.answer-option input { flex: 0 0 auto; margin-top: 3px; accent-color: #ffc94a; }
.quiz-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 19px; }
.quiz-actions .primary-button { border-color: #ffc94a; background: #ffc94a; color: #4e3800; box-shadow: none; }
.quiz-actions .primary-button:hover { background: #ffe08a; }
.quiz-result { min-height: 28px; color: #fff3c4; font-size: 13px; font-weight: 800; }
.quiz-result.good { color: #a7f0dc; }
.quiz-explanations { display: grid; gap: 7px; margin-top: 15px; }
.quiz-explanation { padding: 10px 12px; border-left: 3px solid #ffc94a; color: #dbe4e5; font-size: 12px; }

.competency-grid { display: grid; gap: 16px; }
.competency-card { padding: 23px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); box-shadow: var(--shadow-small); }
.competency-card.is-done { border-color: var(--teal); }
.competency-card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 9px; }
.competency-label { color: var(--teal-dark); font-size: 11px; font-weight: 900; letter-spacing: .06em; }
.competency-status { color: var(--red-dark); font-size: 12px; font-weight: 900; }
.competency-card.is-done .competency-status { color: var(--teal-dark); }
.competency-card h3 { margin-bottom: 6px; font-size: 22px; }
.task-goal { margin: 0 0 17px; color: var(--ink-soft); font-size: 13px; }
.task-question-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.task-question { padding: 14px; border: 1px solid var(--line); border-radius: 6px; background: var(--paper); }
.task-question > p { margin-bottom: 9px; color: var(--ink); font-size: 13px; font-weight: 800; }
.answer-options.light { gap: 4px; }
.answer-options.light .answer-option { padding: 7px 8px; border-radius: 4px; color: var(--ink-soft); font-size: 12px; }
.answer-options.light .answer-option:hover { background: var(--teal-soft); }
.answer-options.light .answer-option input { accent-color: var(--teal); }
.task-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 17px; }
.task-actions .primary-button { min-height: 38px; padding: 8px 13px; font-size: 12px; }
.task-result { color: var(--ink-soft); font-size: 12px; font-weight: 800; }
.task-result.is-good { color: var(--teal-dark); }
.task-result.is-warning { color: var(--red-dark); }
.task-feedback-list { display: grid; gap: 7px; margin-top: 14px; }
.task-feedback { display: flex; align-items: flex-start; gap: 9px; padding: 9px 11px; border-left: 3px solid var(--line-dark); background: var(--paper); color: var(--ink-soft); font-size: 12px; }
.task-feedback strong { flex: 0 0 auto; color: var(--ink); }
.task-feedback.correct { border-left-color: var(--teal); background: var(--teal-soft); }
.task-feedback.hint { border-left-color: var(--gold); background: var(--gold-soft); }

.teacher-layout { display: grid; grid-template-columns: minmax(230px, .32fr) minmax(0, 1fr); gap: 17px; align-items: start; }
.teacher-sidebar { position: sticky; top: 100px; padding: 19px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.teacher-sidebar h2 { margin: 8px 0 16px; font-size: 22px; }
.teacher-lesson-list { display: grid; gap: 8px; }
.teacher-lesson-button { display: block; width: 100%; padding: 12px; border: 1px solid var(--line); border-radius: 5px; background: var(--paper); text-align: left; cursor: pointer; }
.teacher-lesson-button:hover { border-color: var(--teal); }
.teacher-lesson-button.is-active { border-color: var(--red); background: var(--red); color: white; }
.teacher-lesson-button span, .teacher-lesson-button strong, .teacher-lesson-button small { display: block; }
.teacher-lesson-button span { margin-bottom: 5px; color: var(--ink-soft); font-size: 10px; font-weight: 900; }
.teacher-lesson-button strong { font-size: 13px; line-height: 1.3; }
.teacher-lesson-button small { margin-top: 6px; color: var(--ink-soft); font-size: 10px; }
.teacher-lesson-button.is-active span, .teacher-lesson-button.is-active small { color: rgba(255,255,255,.74); }
.teacher-stage { display: grid; gap: 16px; }
.teacher-stage-head { padding: 26px; border: 1px solid var(--line); border-radius: 8px; background: var(--ink); color: white; }
.teacher-stage-head .eyebrow { color: #ffc94a; }
.teacher-stage-head h2 { margin: 14px 0 9px; font-size: clamp(25px, 4vw, 38px); line-height: 1.1; }
.teacher-stage-head p { max-width: 680px; margin-bottom: 20px; color: #dbe4e5; font-size: 14px; }
.teacher-stage-head .hero-fact { color: #dbe4e5; }
.teacher-block { padding: 21px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.teacher-block-heading { margin-bottom: 15px; }
.teacher-block-heading h3 { margin: 7px 0 0; font-size: 20px; }
.teacher-flow { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.teacher-flow-item { padding: 13px; border-left: 3px solid var(--teal); background: var(--paper); }
.teacher-flow-item:nth-child(2n) { border-left-color: var(--red); }
.teacher-flow-item span, .teacher-flow-item strong, .teacher-flow-item p { display: block; }
.teacher-flow-item span { color: var(--ink-soft); font-size: 10px; font-weight: 900; }
.teacher-flow-item strong { margin: 6px 0 4px; font-size: 13px; }
.teacher-flow-item p { margin: 0; color: var(--ink-soft); font-size: 12px; }
.teacher-prompt { padding: 17px; border-left: 4px solid var(--gold); background: var(--gold-soft); }
.teacher-prompt strong { display: block; font-size: 17px; }
.teacher-prompt p { margin: 8px 0 15px; color: #664900; font-size: 13px; }
.teacher-prompt-actions { display: grid; gap: 7px; }
.teacher-prompt-actions span { display: flex; align-items: flex-start; gap: 8px; color: #664900; font-size: 12px; font-weight: 700; }
.teacher-prompt-actions b { display: grid; place-items: center; flex: 0 0 auto; width: 19px; height: 19px; border-radius: 50%; background: var(--gold); color: #4e3800; font-size: 10px; }
.teacher-task-list { display: grid; gap: 8px; }
.teacher-task { border: 1px solid var(--line); border-radius: 5px; background: var(--paper); }
.teacher-task summary { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; padding: 13px; cursor: pointer; list-style: none; }
.teacher-task summary::-webkit-details-marker { display: none; }
.teacher-task summary span { color: var(--red-dark); font-size: 11px; font-weight: 900; }
.teacher-task summary strong { font-size: 13px; }
.teacher-task summary small { color: var(--ink-soft); font-size: 11px; font-weight: 800; }
.teacher-answer-key { display: grid; gap: 8px; padding: 0 13px 13px; }
.teacher-answer-key div { display: grid; gap: 3px; padding: 9px 10px; border-left: 3px solid var(--teal); background: var(--teal-soft); }
.teacher-answer-key strong { font-size: 12px; }
.teacher-answer-key span { color: var(--teal-dark); font-size: 11px; }

.guide-header { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .6fr); gap: 25px; align-items: end; padding-bottom: 30px; border-bottom: 1px solid var(--line); }
.guide-header h1 { margin: 13px 0 12px; font-size: clamp(34px, 5vw, 58px); line-height: 1; }
.guide-header p { max-width: 620px; margin: 0; color: var(--ink-soft); font-size: 16px; }
.guide-callout { padding: 21px; border-left: 5px solid var(--gold); background: var(--gold-soft); }
.guide-callout strong { display: block; margin-bottom: 7px; font-size: 15px; }
.guide-callout span { color: #664900; font-size: 13px; }
.guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.guide-card { padding: 21px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.guide-card h2 { margin-bottom: 12px; font-size: 20px; }
.guide-card p { margin-bottom: 0; color: var(--ink-soft); font-size: 14px; }
.guide-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.guide-list li { display: flex; align-items: flex-start; gap: 10px; color: var(--ink-soft); font-size: 13px; }
.guide-list li::before { flex: 0 0 auto; width: 8px; height: 8px; margin-top: 7px; border-radius: 50%; background: var(--red); content: ""; }
.schedule-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }
.schedule-table { width: 100%; border-collapse: collapse; min-width: 720px; }
.schedule-table th, .schedule-table td { padding: 13px 15px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.schedule-table th { background: var(--paper-deep); color: var(--ink-soft); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.schedule-table td { font-size: 13px; }
.schedule-table tr:last-child td { border-bottom: 0; }
.schedule-table td:first-child { color: var(--red-dark); font-weight: 900; white-space: nowrap; }

.empty-state { padding: 50px; border: 1px dashed var(--line-dark); border-radius: 8px; background: var(--panel); text-align: center; }
.empty-state h2 { margin-bottom: 8px; }
.empty-state p { margin-bottom: 18px; color: var(--ink-soft); }

.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 22px clamp(18px, 4vw, 56px); border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 12px; }
.site-footer strong { display: block; color: var(--ink); font-size: 13px; }
.site-footer span { display: block; margin-top: 3px; }
.footer-note { text-align: right; }

.reveal { animation: reveal .35s ease both; }

@keyframes reveal { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: translateY(0); } }

:focus-visible { outline: 3px solid rgba(22, 123, 130, .42); outline-offset: 3px; }

@media (max-width: 900px) {
  .topnav { gap: 15px; }
  .dashboard-hero, .lesson-hero { grid-template-columns: 1fr; }
  .hero-visual { min-height: 260px; }
  .lesson-visual { min-height: 245px; }
  .lesson-visual-label { position: static; margin: 10px 0 0; }
  .lesson-visual-inner { width: 150px; height: 150px; }
  .lesson-visual-inner img { width: 105px; height: 105px; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .requirements-band, .guide-header { grid-template-columns: 1fr; }
  .requirement-chips { justify-content: start; }
  .mission-panel, .case-panel { grid-template-columns: 1fr; }
  .skill-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .teacher-layout { grid-template-columns: 1fr; }
  .teacher-sidebar { position: static; }
  .resource-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 650px) {
  .topbar { min-height: 68px; padding: 10px 16px; }
  .brand { min-width: 0; }
  .brand-mark { width: 40px; height: 40px; }
  .brand-mark img { width: 37px; height: 37px; }
  .brand strong { font-size: 14px; }
  .brand small { font-size: 10px; }
  .topnav { position: absolute; top: 68px; right: 16px; left: 16px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 7px 13px; border: 1px solid var(--line); border-radius: 6px; background: var(--paper); box-shadow: var(--shadow); }
  .topnav.is-open { display: flex; }
  .topnav a { padding: 10px 0; border-bottom: 1px solid var(--line); }
  .topnav a:last-child { border-bottom: 0; }
  .topnav a::after { display: none; }
  .mobile-menu { display: block; }
  .page-shell { width: min(100% - 24px, var(--max)); padding-top: 23px; }
  .hero-copy { padding: 32px 23px; }
  .hero-copy h1 { font-size: 40px; }
  .hero-copy p { font-size: 15px; }
  .hero-visual { min-height: 220px; }
  .hero-badge { width: 145px; height: 145px; border-width: 8px; }
  .hero-badge img { width: 115px; height: 115px; }
  .hero-visual-note { right: 14px; bottom: 12px; left: 14px; }
  .stat-strip { margin: 17px 0 30px; }
  .stat { padding: 15px; }
  .stat-value { font-size: 21px; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 8px; }
  .lesson-grid, .objectives-grid, .concept-grid, .flow-grid, .guide-grid, .resource-grid, .skill-grid, .task-question-list { grid-template-columns: 1fr; }
  .lesson-card { min-height: 0; }
  .lesson-hero-copy { padding: 32px 23px; }
  .lesson-hero-copy h1 { font-size: 35px; }
  .lesson-visual { min-height: 210px; }
  .lesson-nav { align-items: flex-start; }
  .lesson-nav a { max-width: 48%; }
  .case-panel { padding: 23px; }
  .case-panel h2 { font-size: 29px; }
  .mission-panel, .quiz-panel { padding: 19px; }
  .competency-card { padding: 18px; }
  .skill-summary { align-items: flex-start; flex-wrap: wrap; }
  .skill-summary .progress-track { flex-basis: 100%; order: 3; }
  .teacher-flow { grid-template-columns: 1fr; }
  .teacher-task summary { grid-template-columns: 1fr auto; }
  .teacher-task summary span { grid-column: 1 / -1; }
  .sequence-buttons { grid-template-columns: 1fr; }
  .site-footer { display: block; padding: 20px 16px; }
  .footer-note { margin-top: 12px; text-align: left; }
}