:root {
  --ink: #243028;
  --ink-soft: #3e5146;
  --paper: #f3eee4;
  --card: #fffdf8;
  --teal: #1f7a6b;
  --teal-dark: #14584d;
  --line: #e3d8c4;
  --sun: #e39b3a;
  --ok: #1f7a4a;
  --warn-bg: #fff4d8;
  --warn-ink: #6a4510;
  --shadow: 0 12px 32px rgba(70, 48, 18, 0.08);
  --radius: 22px;
  --header-h: auto;
  font-family: "Noto Sans TC", "PingFang HK", "PingFang TC", "Microsoft JhengHei", "Heiti TC", sans-serif;
}

* { box-sizing: border-box; }

html { font-size: 18px; }

body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(rgba(31, 122, 107, 0.06) 1.1px, transparent 1.2px);
  background-size: 18px 18px;
  line-height: 1.55;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }

button, input { font: inherit; color: inherit; }

button { cursor: pointer; }

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

a { color: var(--teal-dark); }

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: #fff;
  color: var(--ink);
  padding: 8px 12px;
  z-index: 20;
  border-radius: 8px;
}

.skip:focus { top: 8px; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 3px solid var(--teal-dark);
  outline-offset: 3px;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  padding: 18px 20px 16px;
  background: linear-gradient(120deg, #14584d 0%, #1f7a6b 58%, #2f6f8f 100%);
  color: #fff;
}

.brand { display: flex; align-items: center; gap: 12px; }

.mark { width: 56px; height: 56px; flex: none; }

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  opacity: 0.9;
}

.site-header h1 {
  font-size: 1.7rem;
  font-weight: 900;
  line-height: 1.2;
}

.header-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  min-width: min(100%, 280px);
}

.progress-label { font-weight: 700; }

.progress-track {
  flex: 1 1 120px;
  height: 12px;
  background: rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  overflow: hidden;
  min-width: 120px;
}

.progress-track span {
  display: block;
  height: 100%;
  width: 0;
  background: #ffe08a;
  border-radius: inherit;
}

main {
  width: min(1080px, calc(100% - 28px));
  margin: 22px auto 28px;
}

.lede {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.lede h2 { font-size: 1.35rem; margin-bottom: 6px; }

.lede p { color: var(--ink-soft); }

.done-banner {
  margin-top: 12px;
  background: #e7f6ee;
  color: #14584d;
  border-radius: 14px;
  padding: 10px 12px;
  font-weight: 700;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.org-card {
  display: flex;
  flex-direction: column;
  text-align: left;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  min-height: 100%;
}

.org-card .photo,
.org-card .ph {
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
  background: #efe6d4;
}

.org-card .meta { padding: 10px 12px 12px; }

.org-card .name {
  display: block;
  font-size: 1.15rem;
  font-weight: 900;
}

.kind {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--teal-dark);
  background: #e7f3ef;
  border-radius: 999px;
  padding: 2px 8px;
}

.org-card.is-done { box-shadow: inset 0 0 0 3px #8dccab; }

.done-tag {
  display: inline-block;
  margin-left: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ok);
}

.play {
  display: grid;
  gap: 14px;
}

.dossier, .stage, .result-card, .notice {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.dossier { overflow: hidden; }

.dossier .photo,
.dossier .ph { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: #efe6d4; }

.dossier-body { padding: 14px 14px 16px; }

.dossier h2 { font-size: 1.5rem; }

.alias { color: var(--ink-soft); font-size: 0.92rem; }

.obs-details { margin-top: 10px; }

.obs-details summary {
  font-weight: 800;
  cursor: pointer;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.obs { margin: 0; padding-left: 1.15rem; }

.obs li { margin: 6px 0; }

.stage { padding: 14px; }

.steps {
  display: flex;
  gap: 8px;
  padding: 0;
  margin: 0 0 14px;
  list-style: none;
}

.steps button {
  flex: 1;
  min-height: 48px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #f7f3ea;
  font-weight: 700;
}

.steps button[aria-current="step"] {
  background: var(--teal);
  color: #fff;
  border-color: var(--teal);
}

.steps button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.stage h2 { font-size: 1.35rem; margin-bottom: 8px; }

.help { color: var(--ink-soft); margin-bottom: 12px; }

.habitats {
  display: grid;
  gap: 12px;
}

.zone {
  position: relative;
  isolation: isolate;
  min-height: 168px;
  border: 3px solid transparent;
  border-radius: 24px;
  overflow: hidden;
  text-align: left;
  padding: 16px;
  color: #14384c;
}

.zone-polar .scene,
.zone-desert .scene {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.zone-polar .scene {
  background:
    radial-gradient(circle at 16% 24%, #fff 0 16px, transparent 17px),
    radial-gradient(circle at 78% 20%, rgba(255, 255, 255, 0.95) 0 3px, transparent 4px),
    radial-gradient(circle at 68% 32%, rgba(255, 255, 255, 0.95) 0 2px, transparent 3px),
    radial-gradient(circle at 30% 18%, rgba(255, 255, 255, 0.8) 0 2px, transparent 3px),
    linear-gradient(180deg, transparent 58%, rgba(255, 255, 255, 0.72) 58% 68%, transparent 68%),
    linear-gradient(180deg, #8ecae6 0%, #e9f6fb 62%, #d5ebe4 100%);
}

.zone-desert .scene {
  background:
    radial-gradient(circle at 84% 26%, #fff6d0 0 26px, #f0b429 29px, transparent 31px),
    radial-gradient(ellipse at 30% 125%, #e7b56a 0 48%, transparent 49%),
    radial-gradient(ellipse at 78% 140%, #c9843d 0 55%, transparent 56%),
    linear-gradient(180deg, #f2c14d 0%, #f8ddaa 48%, #f4e3c4 100%);
}

.zone-desert { color: #5c320c; }

.zone-kicker { display: block; font-weight: 700; font-size: 0.95rem; }

.zone-name { display: block; font-size: 2rem; font-weight: 900; line-height: 1.15; }

.zone.is-selected {
  border-color: var(--teal-dark);
  box-shadow: 0 0 0 4px rgba(31, 122, 107, 0.28);
}

.zone.is-hover, .drop-zone.is-hover, .chip-pool.is-hover {
  outline: 4px solid var(--teal-dark);
  outline-offset: 2px;
}

.token-row { margin-bottom: 12px; }

.token {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 56px;
  padding: 6px 14px 6px 6px;
  background: #fff;
  border-radius: 999px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  touch-action: none;
  cursor: grab;
  user-select: none;
}

.token img, .token .ph-mini {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}

.picked-habitat {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 4px 12px;
  border-radius: 999px;
  background: #e7f3ef;
  color: var(--teal-dark);
  font-weight: 800;
}

.evidence-layout { display: grid; gap: 12px; }

.chip-pool, .drop-zone {
  border-radius: 18px;
  padding: 12px;
}

.chip-pool {
  background: #f7f3ea;
  border: 1px dashed #d9cbb3;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
  min-height: 88px;
}

.pool-label, .drop-label {
  flex: 1 1 100%;
  font-weight: 800;
  font-size: 0.95rem;
}

.drop-zone {
  background: #f3faf6;
  border: 3px dashed #8dccab;
  min-height: 168px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

.drop-zone.is-ready { border-style: solid; border-color: var(--ok); }

.chip {
  flex: 1 1 150px;
  min-height: 52px;
  padding: 10px 14px;
  border-radius: 16px;
  border: 2px solid #e4d7c2;
  background: #fff;
  text-align: left;
  font-weight: 700;
  touch-action: none;
  user-select: none;
  line-height: 1.35;
}

.chip.in-zone {
  border-color: #8dccab;
  background: #fff;
}

.chip.in-zone::before { content: "✓ "; color: var(--ok); }

.drop-empty {
  flex: 1 1 100%;
  color: var(--ink-soft);
  margin: 8px 0 0;
}

.notice {
  margin: 12px 0 0;
  padding: 12px 14px;
  background: var(--warn-bg);
  color: var(--warn-ink);
  font-weight: 700;
}

.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  padding-bottom: env(safe-area-inset-bottom);
}

.btn {
  min-height: 52px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 2px solid transparent;
  font-weight: 800;
}

.btn-primary { background: var(--teal); color: #fff; flex: 1 1 220px; }

.btn-primary:disabled, .btn-primary[aria-disabled="true"] {
  background: #d7d0c3;
  color: #5e584e;
  cursor: not-allowed;
}

.btn-secondary {
  background: #fff;
  border-color: var(--line);
  flex: 1 1 12em;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  min-height: 48px;
}

.result-card { padding: 18px 16px 16px; position: relative; overflow: hidden; }

.result-card h2 { font-size: 1.6rem; margin-bottom: 8px; }

.result-card.is-right { box-shadow: inset 0 0 0 3px #8dccab, var(--shadow); }

.result-card.is-wrong { background: #fffaf0; }

.choice-recap { margin: 8px 0; font-weight: 700; }

.explain { margin: 8px 0; }

.found { margin: 8px 0 0; padding-left: 1.15rem; }

.eco {
  margin-top: 14px;
  background: #e7f6ee;
  border-radius: 16px;
  padding: 12px;
}

.eco h3 { font-size: 1.05rem; margin-bottom: 4px; }

.burst { pointer-events: none; position: absolute; inset: 0; }

.burst i {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  top: 18px;
  background: var(--sun);
  animation: rise 900ms ease-out both;
}

.burst i:nth-child(1) { left: 12%; background: #1f7a6b; }
.burst i:nth-child(2) { left: 28%; animation-delay: 40ms; background: #e07a5f; }
.burst i:nth-child(3) { left: 46%; animation-delay: 80ms; }
.burst i:nth-child(4) { left: 62%; animation-delay: 20ms; background: #3d7ea6; }
.burst i:nth-child(5) { left: 78%; animation-delay: 100ms; background: #1f7a6b; }
.burst i:nth-child(6) { left: 90%; animation-delay: 60ms; background: #e07a5f; }

@keyframes rise {
  from { transform: translateY(12px) scale(0.6); opacity: 0; }
  to { transform: translateY(-28px) scale(1); opacity: 1; }
}

.shake { animation: shake 0.45s ease; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  50% { transform: translateX(8px); }
  75% { transform: translateX(-4px); }
}

.drag-ghost {
  position: fixed;
  z-index: 40;
  pointer-events: none;
  margin: 0;
  transform: rotate(-2deg) scale(1.03);
  box-shadow: 0 14px 28px rgba(40, 24, 8, 0.2);
}

.is-dragging { opacity: 0.35; }

.ph {
  display: grid;
  place-items: center;
  text-align: center;
  font-weight: 900;
  padding: 12px;
}

.ph-polar { background: linear-gradient(180deg, #d7eef8, #f7fbfe); color: #1d4e73; }
.ph-desert { background: linear-gradient(180deg, #f8e0b0, #fff8ee); color: #8a4b16; }

.ph-emoji { font-size: 2.4rem; display: block; }

.site-footer {
  width: min(1080px, calc(100% - 28px));
  margin: 0 auto 32px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  align-items: center;
}

dialog {
  border: 0;
  padding: 0;
  background: transparent;
  max-width: min(560px, calc(100vw - 24px));
  color: var(--ink);
}

dialog::backdrop { background: rgba(36, 48, 40, 0.48); }

.dialog-card,
.gate-card,
.teacher-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.dialog-card { padding: 18px 18px 16px; }

.dialog-card h2,
.gate-card h2 { font-size: 1.4rem; margin-bottom: 8px; }

.dialog-lead { color: var(--ink-soft); margin-bottom: 10px; }

.credits {
  margin: 0 0 14px;
  padding-left: 1.15rem;
}

.credits li { margin: 6px 0; }

.dialog-card .btn-primary { width: 100%; }

.text-btn {
  background: none;
  border: 0;
  color: var(--teal-dark);
  font-weight: 700;
  min-height: 44px;
  padding: 8px 0;
  text-decoration: underline;
}

a.text-btn { display: inline-flex; align-items: center; }

.gate {
  width: min(720px, calc(100% - 28px));
  margin: 28px auto 40px;
}

.gate-card { padding: 22px 20px 18px; }

.gate-card p { color: var(--ink-soft); margin-bottom: 14px; }

.gate-form { display: grid; gap: 8px; }

.gate-form label { font-weight: 800; }

.gate-form input {
  min-height: 52px;
  border-radius: 14px;
  border: 2px solid var(--line);
  padding: 10px 14px;
  background: #fff;
}

.gate-error {
  margin: 4px 0 0;
  padding: 10px 12px;
  border-radius: 12px;
  background: #fff1ea;
  color: #8a3418;
  font-weight: 800;
}

.teacher-panel { margin-top: 16px; padding: 8px 18px 16px; }

.teacher-panel section { padding: 12px 0; border-top: 1px solid var(--line); }

.teacher-panel h2 { font-size: 1.15rem; margin-bottom: 6px; }

.teacher-panel ul { margin: 6px 0 0; padding-left: 1.2rem; }

.teacher-panel p { margin-top: 6px; }

.noscript {
  width: min(1080px, calc(100% - 28px));
  margin: 12px auto;
  padding: 12px;
  background: var(--warn-bg);
  border-radius: 12px;
}

@media (min-width: 720px) {
  .card-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .habitats { grid-template-columns: 1fr 1fr; }
  .evidence-layout { grid-template-columns: 1.15fr 0.85fr; align-items: start; }
  .chip-pool { order: 1; }
  .drop-zone { order: 2; min-height: 280px; position: static; }
}

@media (min-width: 900px) {
  .play { grid-template-columns: 300px 1fr; align-items: start; }
  .dossier { position: sticky; top: 12px; }
  html { font-size: 18px; }
}

@media (max-width: 719px) {
  html { font-size: 17px; }
  .site-header h1 { font-size: 1.45rem; }
  .dossier {
    display: grid;
    grid-template-columns: 104px 1fr;
    align-items: stretch;
  }
  .dossier .photo,
  .dossier .ph { aspect-ratio: 1; height: 100%; min-height: 104px; }
  .dossier-body { padding: 10px 10px 12px; }
  .dossier h2 { font-size: 1.25rem; }
  .zone { min-height: 132px; }
  .zone-name { font-size: 1.7rem; }
  .drop-zone { position: static; min-height: 148px; }
}

.play.is-observe .dossier {
  display: block;
  position: static;
}

.play.is-observe .photo-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 50vh;
  background: #efe6d4;
}

.play.is-observe .dossier .photo {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  aspect-ratio: auto;
  object-fit: contain;
  object-position: center;
}

.play.is-observe .dossier .ph {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
}

@media (min-width: 900px) {
  .play.is-observe {
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    align-items: start;
  }
}

@media (hover: hover) {
  .org-card:hover { transform: translateY(-3px); }
  .btn-primary:hover:not(:disabled) { background: var(--teal-dark); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .org-card:hover { transform: none; }
  .shake { outline: 3px solid var(--sun); }
}