/* ITTC FA workshop · 淡米黄 solid · dashed panels · Calibri */

:root {
  --color-paper: #F5E6C8;
  --color-paper-2: #F5E6C8;
  --color-ink: #2C2416;
  --color-ink-soft: #4A3F2E;
  --color-muted: #6B5E48;
  --color-accent: #6B5344;
  --color-accent-deep: #4A3A2C;
  --color-accent-soft: #F0DDB0;
  --color-warm: #C4A35A;
  --color-danger: #A65D4A;
  --color-ok: #5A7A4A;
  --color-line: #8B7355;
  --color-box: #FFF8E8;
  --color-topbar: #F5E6C8;

  --ink: var(--color-ink);
  --ink-soft: var(--color-ink-soft);
  --muted: var(--color-muted);
  --paper: var(--color-box);
  --bg: var(--color-paper);
  --teal: var(--color-accent);
  --teal-deep: var(--color-accent-deep);
  --teal-soft: var(--color-accent-soft);
  --coral: var(--color-danger);
  --gold: var(--color-warm);
  --line: var(--color-line);

  --font-display: Calibri, Carlito, "Segoe UI", sans-serif;
  --font-body: Calibri, Carlito, "Segoe UI", sans-serif;
  --font-mono: Calibri, Carlito, "Segoe UI", sans-serif;

  --shadow: none;
  --radius: 4px;
  --measure: 68ch;
  --dash: 1.5px dashed var(--color-line);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  overflow-x: clip;
  font-family: var(--font-body);
  font-size: 17px;
  color: var(--color-ink);
  background: var(--color-paper);
}

body { padding: 0 0 120px; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  background: var(--color-paper);
  color: var(--color-ink);
  border-bottom: var(--dash);
}
.topbar .brand {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-accent-deep);
}
.topbar .who { font-size: 14px; color: var(--color-ink-soft); }
.topbar .theme {
  font-size: 12px;
  color: var(--color-muted);
  max-width: 46vw;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.shell {
  max-width: 920px;
  margin: 0 auto;
  padding: 22px 16px 40px;
}

.screen { display: none; }
.screen.active { display: block; }

.phase {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}
.phase-num, .phase-label {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
  font-weight: 700;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.25;
  margin: 0 0 12px;
  overflow-wrap: anywhere;
  min-width: 0;
  color: var(--color-ink);
}
h1 { font-size: clamp(1.55rem, 3.6vw, 2.1rem); }
h2 { font-size: clamp(1.3rem, 3vw, 1.75rem); }
h3 { font-size: 1.1rem; color: var(--color-accent-deep); }

.lead {
  font-size: 1.05rem;
  color: var(--color-ink-soft);
  line-height: 1.6;
  max-width: var(--measure);
}
.detail {
  font-size: 1rem;
  color: var(--color-ink-soft);
  line-height: 1.65;
  max-width: var(--measure);
  margin: 0 0 10px;
}
.kicker {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 10px;
  font-weight: 700;
}

.panel, .card, .scenario, .tech, .stat, .match-item, .share-card, .join-box {
  background: var(--color-box);
  border: var(--dash);
  border-radius: var(--radius);
  padding: 18px;
  margin: 14px 0;
  position: relative;
  box-shadow: none;
}
.panel.soft, .card.teal { background: var(--color-accent-soft); }
.panel.warm { background: #F8E8C0; }
.card.ink {
  background: var(--color-box);
  color: var(--color-ink);
  border: var(--dash);
}

.bilingual { position: relative; padding-right: 56px; }
.tr-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  border: var(--dash);
  background: var(--color-box);
  color: var(--color-accent-deep);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
}
.tr-btn.active {
  background: var(--color-accent);
  color: #FFF8E8;
  border-style: solid;
}
.zh {
  display: none;
  margin-top: 12px;
  padding-top: 12px;
  border-top: var(--dash);
  color: var(--color-ink-soft);
  line-height: 1.65;
}
.zh.show { display: block; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.tech-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin: 12px 0;
}
.tech { margin: 0; }
.tech strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 4px;
  color: var(--color-accent-deep);
}
.tech span { font-size: 0.9rem; color: var(--color-ink-soft); line-height: 1.45; }

.figure {
  width: 100%;
  height: auto;
  border-radius: 2px;
  display: block;
  border: var(--dash);
  background: #fff;
}
.figure-caption {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin: 8px 0 0;
  line-height: 1.45;
}

.prompt {
  background: var(--color-box);
  border: var(--dash);
  border-left: 3px solid var(--color-accent);
  padding: 12px 14px;
  border-radius: 0 4px 4px 0;
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--color-ink-soft);
  margin: 10px 0;
}
.prompt .label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 6px;
  font-weight: 700;
}

label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin: 10px 0 6px;
  color: var(--color-ink-soft);
}
input[type="text"], textarea, select {
  width: 100%;
  border: var(--dash);
  border-radius: 4px;
  padding: 12px 14px;
  font: inherit;
  background: #FFFDF6;
  color: var(--color-ink);
}
textarea { min-height: 88px; resize: vertical; }
input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn, button.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: var(--dash);
  background: var(--color-box);
  color: var(--color-accent-deep);
  border-radius: 999px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.btn.primary, button.btn.primary {
  background: var(--color-accent);
  color: #FFF8E8;
  border: 1.5px solid var(--color-accent);
}
.btn:hover { filter: brightness(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.choice {
  display: block;
  width: 100%;
  text-align: left;
  margin: 8px 0;
  padding: 12px 14px;
  border-radius: 4px;
  border: var(--dash);
  background: #FFFDF6;
  font: inherit;
  cursor: pointer;
  color: var(--color-ink);
  white-space: normal;
}
.choice:hover { background: var(--color-accent-soft); }
.choice.selected { background: var(--color-accent-soft); border-style: solid; }
.choice.correct { background: #E8F0DC; border-color: var(--color-ok); border-style: solid; }
.choice.wrong { background: #F5E0D8; border-color: var(--color-danger); border-style: solid; }
.quiz-result {
  margin-top: 10px;
  font-weight: 700;
  color: var(--color-accent-deep);
}

.scenario { margin: 10px 0; }
.scenario p { margin: 0 0 10px; line-height: 1.55; color: var(--color-ink-soft); }
.vote-row { display: flex; gap: 8px; flex-wrap: wrap; }
.vote-row .choice { width: auto; flex: 1; min-width: 100px; text-align: center; }

.match-board { display: grid; gap: 10px; }
.match-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.match-item { margin: 0; }
.match-item.strategy { background: var(--color-accent-soft); font-weight: 700; color: var(--color-accent-deep); }
.match-item select { margin-top: 8px; font-size: 0.95rem; }

.share-box { margin-top: 8px; }
.share-box .saved {
  display: none;
  margin-top: 8px;
  color: var(--color-ok);
  font-weight: 700;
  font-size: 0.9rem;
}
.share-box .saved.show { display: block; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.stat { margin: 0; }
.stat .n {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-accent-deep);
}
.stat .l { font-size: 0.88rem; color: var(--color-muted); }

.join-box { max-width: 480px; margin: 40px auto; }
.break-hero {
  text-align: center;
  padding: 48px 20px;
  background: var(--color-box);
  border-radius: 4px;
  border: var(--dash);
}

.navdock {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 50;
  display: flex;
  gap: 8px;
  justify-content: stretch;
  align-items: center;
  padding: 10px 10px calc(10px + env(safe-area-inset-bottom));
  background: var(--color-paper);
  border-top: var(--dash);
}
.navdock-step {
  flex: 0 0 auto;
  padding: 8px 12px;
  font-size: 13px;
}
.page-scroller {
  flex: 1 1 auto;
  display: flex;
  gap: 6px;
  align-items: center;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  min-width: 0;
  padding: 2px 2px 4px;
}
.page-scroller::-webkit-scrollbar { height: 4px; }
.page-scroller::-webkit-scrollbar-thumb {
  background: var(--color-line);
  border-radius: 999px;
}
.page-chip {
  flex: 0 0 auto;
  scroll-snap-align: center;
  border: var(--dash);
  background: var(--color-box);
  color: var(--color-accent-deep);
  border-radius: 999px;
  padding: 7px 12px;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  white-space: nowrap;
  max-width: 16rem;
  overflow: hidden;
  text-overflow: ellipsis;
}
.page-chip:hover { filter: brightness(0.98); }
.page-chip.active {
  background: var(--color-accent);
  color: #FFF8E8;
  border-color: var(--color-accent);
}
.page-chip .n {
  opacity: 0.75;
  margin-right: 0.35em;
  font-variant-numeric: tabular-nums;
}
.page-chip.active .n { opacity: 0.9; }

.host-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.host-table th, .host-table td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: var(--dash);
}
.host-table th { color: var(--color-muted); font-weight: 700; font-size: 0.82rem; }
.host-table tr:hover td { background: var(--color-accent-soft); }

.live {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-ok);
  margin-right: 6px;
}

.share-wall {
  max-height: 320px;
  overflow: auto;
  display: grid;
  gap: 8px;
}
.share-card { margin: 0; }
.share-card .meta {
  font-size: 12px;
  color: var(--color-accent);
  margin-bottom: 4px;
  font-weight: 700;
}
.share-card .body { font-size: 0.95rem; line-height: 1.45; color: var(--color-ink-soft); }

.pill-filters { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.pill-filters button {
  border: var(--dash);
  background: var(--color-box);
  border-radius: 999px;
  padding: 6px 10px;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  color: var(--color-ink-soft);
}
.pill-filters button.active {
  background: var(--color-accent);
  color: #FFF8E8;
  border-style: solid;
}

.bar {
  height: 10px;
  background: var(--color-accent-soft);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 6px;
  border: var(--dash);
}
.bar > i { display: block; height: 100%; background: var(--color-accent); width: 0%; }

ul.clean { margin: 8px 0 0; padding-left: 1.2em; color: var(--color-ink-soft); line-height: 1.6; }
ul.clean li { margin: 6px 0; }

.download-banner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

@media (max-width: 720px) {
  .grid-2, .match-row { grid-template-columns: 1fr; }
  .topbar .theme { display: none; }
  .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Print / PDF portfolio */
@media print {
  body { background: white; padding: 0; }
  .topbar, .navdock, .tr-btn, .no-print { display: none !important; }
  .screen { display: block !important; page-break-after: always; }
  .panel, .card, .scenario, .tech { break-inside: avoid; }
}