:root {
  --ink: #0d0f14;
  --ink-2: #151922;
  --panel: #1b2029;
  --gold: #d9b45b;
  --gold-soft: #f0d68f;
  --jade: #6fcf97;
  --jade-deep: #2f855a;
  --text: #e8e6df;
  --dim: #9aa0ab;
  --line: rgba(217, 180, 91, 0.25);
  --danger: #e07a5f;
  --font-cn: "Songti SC", "STSong", "Noto Serif SC", serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background:
    radial-gradient(1200px 600px at 50% -10%, #202636 0%, transparent 60%),
    radial-gradient(900px 500px at 90% 110%, #1a2b24 0%, transparent 55%),
    var(--ink);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 18px 120px;
  position: relative;
}

.hidden {
  display: none !important;
}
.dim {
  color: var(--dim);
}

/* ---------- Buttons ---------- */
.btn {
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--ink-2);
  color: var(--text);
  padding: 11px 18px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition:
    transform 0.08s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(1px);
}
.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  color: #241d06;
  border-color: var(--gold);
  box-shadow: 0 6px 20px rgba(217, 180, 91, 0.28);
}
.btn-jade {
  background: linear-gradient(135deg, var(--jade-deep), var(--jade));
  color: #05130c;
  border-color: var(--jade);
}
.btn-ghost {
  background: transparent;
}
.btn.full {
  width: 100%;
}

/* ---------- Intro / Ending ---------- */
.scene {
  animation: fade 0.5s ease;
}
@keyframes fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.ink-frame {
  text-align: center;
  padding: 40px 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(27, 32, 41, 0.9), rgba(13, 15, 20, 0.9));
  position: relative;
  overflow: hidden;
}
.ink-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 200px at 50% 0%, rgba(217, 180, 91, 0.1), transparent 70%);
  pointer-events: none;
}
.seal {
  width: 66px;
  height: 66px;
  margin: 0 auto 18px;
  border-radius: 12px;
  background: linear-gradient(135deg, #8a2d2d, #b5453f);
  color: #fff;
  font-family: var(--font-cn);
  font-size: 38px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(181, 69, 63, 0.4);
}
.title {
  font-family: var(--font-cn);
  font-size: 44px;
  letter-spacing: 6px;
  margin: 0 0 6px;
  color: var(--gold-soft);
  text-shadow: 0 2px 20px rgba(217, 180, 91, 0.3);
}
.subtitle {
  color: var(--dim);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 12px;
  margin: 0 0 24px;
}
.tagline {
  font-size: 18px;
  line-height: 1.7;
  margin: 0 0 18px;
}
.rules {
  color: var(--dim);
  font-size: 14px;
  line-height: 1.6;
  max-width: 440px;
  margin: 0 auto 26px;
}
.intro-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.speech-note {
  margin-top: 18px;
  font-size: 12px;
  color: var(--dim);
  min-height: 16px;
}

/* ---------- Story ---------- */
.story-head {
  margin-bottom: 18px;
}
.progress-track {
  height: 6px;
  background: var(--ink-2);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--jade), var(--gold));
  transition: width 0.5s ease;
}
.meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  font-size: 13px;
}
.stage-badge {
  background: rgba(111, 207, 151, 0.14);
  color: var(--jade);
  border: 1px solid rgba(111, 207, 151, 0.35);
  padding: 4px 12px;
  border-radius: 999px;
  font-family: var(--font-cn);
  font-weight: 700;
}
.chapter {
  color: var(--gold);
  font-family: var(--font-cn);
}
.age {
  margin-left: auto;
  color: var(--dim);
  font-family: var(--font-cn);
}

.episode-card {
  background: linear-gradient(180deg, var(--panel), var(--ink-2));
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 22px;
}
.ep-title {
  font-family: var(--font-cn);
  font-size: 30px;
  margin: 0;
  color: var(--gold-soft);
}
.ep-title-en {
  color: var(--dim);
  margin: 2px 0 18px;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.narration {
  line-height: 1.85;
  font-size: 16px;
  margin: 0 0 22px;
  white-space: pre-line;
}
.narration b {
  color: var(--gold-soft);
  font-weight: 600;
}

.word-card {
  text-align: center;
  padding: 20px;
  border-radius: 14px;
  background: radial-gradient(300px 120px at 50% 0%, rgba(217, 180, 91, 0.12), transparent 70%),
    var(--ink);
  border: 1px dashed var(--line);
  margin-bottom: 18px;
}
.word-hanzi {
  font-family: var(--font-cn);
  font-size: 46px;
  color: var(--gold-soft);
  letter-spacing: 4px;
  line-height: 1.1;
}
.word-pinyin {
  color: var(--jade);
  font-size: 20px;
  margin-top: 6px;
  font-style: italic;
}
.word-meaning {
  color: var(--dim);
  margin-top: 4px;
  font-size: 15px;
}

.unlock-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
#answerInput {
  flex: 1 1 200px;
  min-width: 0;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--ink);
  color: var(--text);
  font-size: 16px;
}
#answerInput:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(217, 180, 91, 0.15);
}
.btn-mic {
  font-size: 18px;
  padding: 11px 14px;
}
.btn-mic.listening {
  animation: pulse 1s infinite;
  border-color: var(--danger);
}
@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(224, 122, 95, 0.5);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(224, 122, 95, 0);
  }
}
.feedback {
  min-height: 22px;
  margin: 14px 0 0;
  font-size: 15px;
  text-align: center;
}
.feedback.ok {
  color: var(--jade);
}
.feedback.no {
  color: var(--danger);
}
.feedback.info {
  color: var(--dim);
}

.ending-frame .title {
  font-size: 40px;
}

/* ---------- Voice Hall ---------- */
.hall {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: 300px;
  max-width: calc(100vw - 32px);
  background: linear-gradient(180deg, var(--panel), var(--ink-2));
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  z-index: 50;
  overflow: hidden;
}
.hall-toggle {
  width: 100%;
  text-align: left;
  background: rgba(217, 180, 91, 0.1);
  color: var(--gold-soft);
  border: none;
  padding: 12px 16px;
  font-family: var(--font-cn);
  font-weight: 700;
  cursor: pointer;
  font-size: 15px;
}
.hall.collapsed .hall-body {
  display: none;
}
.hall-body {
  padding: 14px 16px 16px;
}
.hall-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-cn);
  color: var(--gold-soft);
  margin-bottom: 10px;
  font-size: 15px;
}
.rtc-badge {
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 1px;
}
.rtc-badge.live {
  color: var(--jade);
}
.hall-hint {
  font-size: 12px;
  color: var(--dim);
  line-height: 1.5;
  margin: 0 0 12px;
}
.demo-note {
  font-size: 11px;
  color: var(--dim);
  line-height: 1.5;
  margin: 0 0 10px;
}
.lobby input,
.join-row input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--ink);
  color: var(--text);
  font-size: 14px;
  margin-bottom: 10px;
}
.join-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}
.join-row input {
  flex: 1;
  text-transform: uppercase;
  letter-spacing: 2px;
}
.join-row .btn {
  padding: 10px 14px;
}

.room-header {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--dim);
  margin-bottom: 10px;
}
.room-code {
  font-family: var(--font-cn);
  color: var(--gold);
  letter-spacing: 3px;
  font-weight: 700;
}
.member-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  max-height: 180px;
  overflow-y: auto;
}
.member-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 9px;
  background: var(--ink);
  margin-bottom: 6px;
  font-size: 14px;
}
.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--dim);
  flex-shrink: 0;
}
.dot.speaking {
  background: var(--jade);
  box-shadow: 0 0 0 4px rgba(111, 207, 151, 0.25);
  animation: talk 0.6s infinite alternate;
}
.dot.muted {
  background: var(--danger);
}
@keyframes talk {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.35);
  }
}
.member-name {
  flex: 1;
}
.member-you {
  font-size: 11px;
  color: var(--gold);
}
.member-phantom {
  font-size: 11px;
  color: var(--dim);
}

.mic-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.btn-mic-toggle {
  flex-shrink: 0;
  background: var(--ink);
}
.btn-mic-toggle.live {
  background: linear-gradient(135deg, var(--jade-deep), var(--jade));
  color: #05130c;
  border-color: var(--jade);
}
.meter {
  flex: 1;
  height: 10px;
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--jade), var(--gold));
  transition: width 0.06s linear;
}

@media (max-width: 560px) {
  .title {
    font-size: 34px;
  }
  .hall {
    width: calc(100vw - 32px);
  }
}