:root {
  color-scheme: light;
  --navy: #17365d;
  --blue: #2e74b5;
  --blue-dark: #1f4d78;
  --blue-pale: #eaf2f8;
  --green: #19724d;
  --green-pale: #e8f5ee;
  --red: #a12a2a;
  --red-pale: #fff0f0;
  --gold: #9a6500;
  --ink: #18212f;
  --muted: #667085;
  --line: #d6dde7;
  --surface: #ffffff;
  --background: #f5f7fa;
  --shadow: 0 18px 50px rgba(23, 54, 93, 0.1);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--background); }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% -10%, rgba(46, 116, 181, 0.15), transparent 38rem),
    var(--background);
}

button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.55; }

:focus-visible {
  outline: 3px solid #f0a800;
  outline-offset: 3px;
}

.hidden { display: none !important; }

.site-header {
  min-height: 64px;
  padding: 10px max(18px, env(safe-area-inset-right)) 10px max(18px, env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.9);
  border-bottom: 1px solid rgba(214,221,231,0.9);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.08rem;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: white;
  background: var(--navy);
  border-radius: 12px;
  font-size: 1.3rem;
}

.connection {
  display: flex;
  gap: 7px;
  align-items: center;
  color: var(--muted);
  font-size: 0.82rem;
}

.status-dot { width: 9px; height: 9px; border-radius: 50%; background: #98a2b3; }
.connection[data-state="online"] .status-dot { background: #25a66a; }
.connection[data-state="connecting"] .status-dot { background: #e19a1a; }
.connection[data-state="offline"] .status-dot { background: #c04444; }

.shell {
  width: min(100% - 32px, 1040px);
  margin: 0 auto;
  padding: clamp(26px, 5vw, 64px) 0 calc(100px + env(safe-area-inset-bottom));
}

.panel, .question-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: clamp(24px, 5vw, 48px);
}

.auth-panel { max-width: 640px; margin: 4vh auto 0; }
.auth-panel h1, .panel h1 { margin: 0 0 14px; color: var(--navy); font-size: clamp(2rem, 6vw, 3.4rem); line-height: 1.08; }
.eyebrow { margin: 0 0 8px; color: var(--blue); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; }
.lead { color: var(--muted); line-height: 1.7; font-size: 1.02rem; }

.stack { display: grid; gap: 10px; margin-top: 28px; }
.stack.compact { margin-top: 16px; }
label { font-weight: 700; color: var(--blue-dark); }
input, select, textarea {
  width: 100%;
  min-height: 48px;
  border: 1px solid #aeb9c8;
  border-radius: 12px;
  padding: 10px 13px;
  color: var(--ink);
  background: white;
}
textarea { resize: vertical; line-height: 1.5; }

.button {
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 10px 18px;
  font-weight: 800;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.button:hover:not(:disabled) { transform: translateY(-1px); }
.button.primary { color: white; background: var(--navy); box-shadow: 0 8px 20px rgba(23,54,93,.22); }
.button.secondary { color: var(--navy); background: var(--blue-pale); border-color: #b7cee2; }
.button.correct { color: white; background: var(--green); box-shadow: 0 8px 20px rgba(25,114,77,.2); }
.button.danger { color: var(--red); background: var(--red-pale); border-color: #efc2c2; }
.button.quiet { color: var(--blue-dark); background: transparent; border-color: var(--line); }
.button.small { min-height: 38px; padding: 6px 12px; font-size: .85rem; }

.section-heading { display: flex; align-items: start; justify-content: space-between; gap: 16px; }
.choice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 30px; }
.choice-card { padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: #fbfcfe; }
.choice-card h2 { margin: 0 0 8px; color: var(--navy); }
.choice-card p { min-height: 48px; color: var(--muted); line-height: 1.55; }
.room-input { text-transform: uppercase; letter-spacing: .22em; font-weight: 800; font-size: 1.2rem; }

.room-topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 16px;
}
.small-label { display: block; color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .06em; }
.room-code { border: 0; padding: 2px 0; background: transparent; color: var(--navy); font-weight: 900; font-size: 1.5rem; letter-spacing: .15em; }
.timer { text-align: right; }
.timer strong { color: var(--navy); font-size: 1.7rem; font-variant-numeric: tabular-nums; }
.timer.warning strong { color: var(--red); }

.scoreboard {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  max-width: 620px;
  margin: 0 auto 22px;
  padding: 14px 20px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 16px;
}
.score-person { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; align-items: center; }
.score-person:nth-child(3) { text-align: right; }
.score-person strong { grid-row: span 2; font-size: 2rem; color: var(--navy); }
.presence { font-size: .72rem; color: #a33; }
.presence[data-connected="true"] { color: var(--green); }
.score-divider { color: #aeb9c8; font-size: 1.6rem; }

.players { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 28px 0; }
.player-chip { display: grid; gap: 3px; padding: 16px; border-radius: 14px; background: var(--blue-pale); }
.player-chip span { font-size: .75rem; color: var(--muted); }
.duration-form { display: flex; align-items: end; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.duration-form > label { width: 100%; }
.duration-control { display: flex; align-items: center; gap: 8px; }
.duration-control input { width: 92px; }
.notice { color: var(--muted); padding: 14px 16px; background: #f8fafc; border-radius: 12px; }

.role-banner {
  margin: 0 auto 14px;
  padding: 13px 18px;
  border-radius: 14px;
  text-align: center;
  font-weight: 900;
  color: var(--navy);
  background: var(--blue-pale);
}
.role-banner[data-role="clue"] { color: #11563a; background: var(--green-pale); }
.question-card { min-height: 330px; display: grid; align-content: center; text-align: center; }
.question-content { margin: 14px 0; color: var(--navy); font-weight: 900; line-height: 1.25; overflow-wrap: anywhere; }
.question-content.zhuyin { font-size: clamp(2.7rem, 11vw, 6rem); letter-spacing: .12em; }
.question-content.answer { font-size: clamp(2.5rem, 9vw, 5.3rem); }
.question-meta { color: var(--muted); margin: 5px 0; }
.spoken-answer { color: var(--gold); font-weight: 800; font-size: 1.15rem; }
.rule-reminder { max-width: 760px; margin: 14px auto; color: var(--muted); line-height: 1.55; text-align: center; }
.game-actions {
  position: sticky;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 14px max(0px, env(safe-area-inset-right)) calc(14px + env(safe-area-inset-bottom)) max(0px, env(safe-area-inset-left));
  background: linear-gradient(transparent, var(--background) 18%);
}

.final-scores { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 24px 0; }
.final-score { display: grid; gap: 5px; padding: 18px; border-radius: 16px; background: var(--blue-pale); text-align: center; }
.final-score strong { font-size: 3rem; color: var(--navy); }
.results-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; }
.history-title { margin-top: 36px; color: var(--navy); }
.round-history { display: grid; gap: 9px; }
.history-item { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 13px 15px; border: 1px solid var(--line); border-radius: 12px; }
.history-item > div { display: grid; gap: 3px; }
.history-item span { color: var(--muted); font-size: .84rem; }

.toast {
  position: fixed;
  z-index: 30;
  left: 50%;
  bottom: calc(24px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  max-width: min(90vw, 520px);
  color: white;
  background: var(--navy);
  border-radius: 12px;
  padding: 12px 18px;
  box-shadow: var(--shadow);
}
.toast.error { background: var(--red); }

dialog { border: 0; border-radius: 20px; padding: 0; width: min(92vw, 560px); box-shadow: 0 30px 80px rgba(0,0,0,.28); }
dialog::backdrop { background: rgba(15, 24, 38, .58); backdrop-filter: blur(2px); }
.dialog-form { display: grid; gap: 12px; padding: 28px; }
.dialog-form h2 { margin: 0; color: var(--navy); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

.admin-header-actions { display: flex; align-items: center; gap: 12px; color: var(--muted); }
.admin-shell { width: min(100% - 32px, 1280px); }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 22px; }
.metric { display: grid; gap: 5px; padding: 18px; background: white; border: 1px solid var(--line); border-radius: 16px; }
.metric span { color: var(--muted); font-size: .84rem; }
.metric strong { color: var(--navy); font-size: 2rem; }
.admin-tabs { display: flex; gap: 6px; overflow-x: auto; margin-bottom: 16px; padding: 5px; background: #e9edf3; border-radius: 14px; }
.tab { white-space: nowrap; border: 0; border-radius: 10px; padding: 11px 16px; color: var(--muted); background: transparent; font-weight: 800; }
.tab.active { color: var(--navy); background: white; box-shadow: 0 3px 10px rgba(23,54,93,.09); }
.admin-section { padding: clamp(20px, 4vw, 34px); background: white; border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); }
.admin-section h2, .admin-section h3 { margin: 0 0 12px; color: var(--navy); }
.filter-row { display: grid; grid-template-columns: 2fr 1fr 1fr auto; gap: 10px; margin: 22px 0 14px; }
.table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--line); border-radius: 13px; }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { color: var(--blue-dark); background: #f7f9fc; font-size: .78rem; text-transform: uppercase; }
tbody tr:last-child td { border-bottom: 0; }
.badge { display: inline-block; border-radius: 999px; padding: 4px 9px; font-size: .76rem; font-weight: 800; background: #eef1f5; }
.badge.active { color: var(--green); background: var(--green-pale); }
.badge.draft { color: var(--gold); background: #fff7de; }
.badge.disabled, .badge.rejected { color: var(--red); background: var(--red-pale); }
.admin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.subpanel { display: grid; gap: 9px; align-content: start; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: #fbfcfe; }
.subpanel p { color: var(--muted); line-height: 1.55; }
.import-results { margin-top: 20px; }
.card-list { display: grid; gap: 10px; }
.report-card { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px; border: 1px solid var(--line); border-radius: 14px; }
.report-card > div:first-child { display: grid; gap: 5px; }
.report-card span { color: var(--muted); font-size: .83rem; }
.report-card p { margin: 0; }
.inline-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.checkbox-label { display: flex; align-items: center; gap: 9px; padding-top: 24px; }
.checkbox-label input { width: 22px; min-height: 22px; }
.notice.warning { color: var(--gold); background: #fff7de; }

@media (max-width: 680px) {
  .shell { width: min(100% - 22px, 1040px); padding-top: 24px; }
  .choice-grid { grid-template-columns: 1fr; }
  .choice-card p { min-height: auto; }
  .section-heading { display: grid; }
  .players { grid-template-columns: 1fr; }
  .question-card { min-height: 300px; padding: 24px 16px; }
  .game-actions { grid-template-columns: 1fr 1fr; }
  .game-actions .quiet-danger { grid-column: 1 / -1; }
  .scoreboard { gap: 8px; padding: 12px; }
  .score-person { grid-template-columns: 1fr; }
  .score-person strong { grid-row: auto; }
  .final-scores { grid-template-columns: 1fr 1fr; }
  .history-item { align-items: start; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .filter-row, .admin-grid { grid-template-columns: 1fr; }
  .report-card { display: grid; }
  .two-col { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}