:root {
  --paper: #f3ead9;
  --ink: #24221e;
  --ink-soft: #686157;
  --red: #9d3027;
  --red-dark: #76231f;
  --line: rgba(63, 48, 33, .18);
  --card: rgba(255, 253, 247, .76);
  --shadow: 0 28px 70px rgba(74, 47, 22, .13);
  --radius: 22px;
}
* { box-sizing: border-box; }
html { min-height: 100%; background: var(--paper); }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  background: linear-gradient(rgba(255,255,255,.34) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.24) 1px, transparent 1px), radial-gradient(circle at 12% 8%, rgba(255,255,255,.75), transparent 34%), var(--paper);
  background-size: 34px 34px, 34px 34px, auto, auto;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 20; padding: 10px 14px; background: var(--ink); color: white; }
.skip-link:focus { top: 12px; }
.topbar { height: 82px; display: flex; align-items: center; justify-content: space-between; padding: 0 clamp(22px, 4vw, 68px); border-bottom: 1px solid var(--line); background: rgba(247, 240, 225, .78); backdrop-filter: blur(14px); }
.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-seal { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: var(--paper); background: var(--red); font-size: 22px; box-shadow: inset 0 0 0 2px rgba(255,255,255,.25); }
.brand-copy { display: flex; flex-direction: column; gap: 1px; }
.brand-copy strong { font-size: 19px; letter-spacing: .12em; }
.brand-copy small { font: 9px/1.2 ui-sans-serif, system-ui; letter-spacing: .2em; color: var(--ink-soft); }
.topbar-actions { display: flex; align-items: center; gap: 18px; }
.glossary-button { min-height: 34px; padding: 0 13px; border: 1px solid var(--line); border-radius: 999px; color: var(--red); background: rgba(255,255,255,.44); font: 700 12px ui-sans-serif, system-ui; }
.glossary-button:hover { background: rgba(255,255,255,.75); }
.connection { display: flex; align-items: center; gap: 8px; color: var(--ink-soft); font: 13px ui-sans-serif, system-ui; }
.connection i { width: 7px; height: 7px; border-radius: 50%; background: #c99635; box-shadow: 0 0 0 4px rgba(201,150,53,.12); }
.connection.online i { background: #4d8056; box-shadow: 0 0 0 4px rgba(77,128,86,.12); }
.lobby-shell { min-height: calc(100vh - 82px); display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr); }
.intro-panel { padding: clamp(62px, 10vh, 120px) clamp(34px, 7vw, 120px); border-right: 1px solid var(--line); position: relative; overflow: hidden; }
.intro-panel::after { content: "象"; position: absolute; right: -30px; bottom: -115px; font-size: clamp(280px, 34vw, 520px); line-height: 1; color: rgba(105,75,42,.045); pointer-events: none; }
.eyebrow { margin: 0 0 13px; color: var(--red); font: 700 11px ui-sans-serif, system-ui; letter-spacing: .22em; text-transform: uppercase; }
.intro-panel h1 { margin: 0; font-size: clamp(48px, 6.3vw, 92px); line-height: 1.08; font-weight: 500; letter-spacing: -.04em; }
.intro-copy { max-width: 540px; margin: 34px 0 0; font-size: 18px; line-height: 1.9; color: var(--ink-soft); }
.rule-line { display: flex; align-items: center; gap: 14px; width: min(430px, 100%); margin-top: 58px; color: var(--red); font-size: 19px; }
.rule-line i { flex: 1; height: 1px; background: var(--line); }
.entry-panel { padding: clamp(52px, 10vh, 120px) clamp(24px, 6vw, 92px); display: grid; align-content: center; }
.entry-card { max-width: 500px; width: 100%; padding: clamp(28px, 4vw, 44px); border: 1px solid rgba(88,65,42,.2); border-radius: var(--radius); background: var(--card); box-shadow: var(--shadow); backdrop-filter: blur(10px); }
.entry-card > label { display: block; margin-bottom: 10px; font-weight: 700; }
input, select { width: 100%; height: 52px; border: 1px solid rgba(77,58,38,.23); border-radius: 11px; background: rgba(255,255,255,.63); color: var(--ink); padding: 0 15px; outline: none; }
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%), linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%); background-position: calc(100% - 19px) 22px, calc(100% - 14px) 22px; background-size: 5px 5px; background-repeat: no-repeat; }
input:focus, select:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(157,48,39,.11); }
.field-hint { margin: 8px 0 22px; color: var(--ink-soft); font: 12px ui-sans-serif, system-ui; }
.compact-hint { margin-bottom: 18px; }
.time-setting { display: grid; grid-template-columns: 1fr 48px; align-items: center; margin-top: 10px; border: 1px solid rgba(77,58,38,.23); border-radius: 11px; background: rgba(255,255,255,.63); overflow: hidden; }
.time-setting:focus-within { border-color: var(--red); box-shadow: 0 0 0 3px rgba(157,48,39,.11); }
.time-setting input { border: 0; border-radius: 0; background: transparent; box-shadow: none; }
.time-setting input:focus { box-shadow: none; }
.time-setting span { color: var(--ink-soft); text-align: center; border-left: 1px solid var(--line); font: 13px ui-sans-serif, system-ui; }
.button { min-height: 48px; border: 0; border-radius: 11px; padding: 0 19px; display: inline-flex; align-items: center; justify-content: center; gap: 12px; font-weight: 700; transition: transform .16s ease, background .16s ease, box-shadow .16s ease; }
.button:hover { transform: translateY(-1px); }
.button:disabled { opacity: .42; cursor: not-allowed; transform: none; }
.button-red { width: 100%; color: white; background: var(--red); box-shadow: 0 9px 22px rgba(157,48,39,.2); }
.button-red:hover { background: var(--red-dark); }
.button-red span { margin-left: auto; }
.button-ink { color: white; background: var(--ink); white-space: nowrap; }
.button-light { color: var(--ink); background: rgba(255,255,255,.58); border: 1px solid var(--line); }
.button-light.danger { color: var(--red); }
.button-light.attention { color: white; background: var(--red); border-color: var(--red); box-shadow: 0 7px 18px rgba(157,48,39,.18); }
.divider { display: flex; align-items: center; gap: 14px; margin: 30px 0 18px; color: var(--ink-soft); font: 11px ui-sans-serif, system-ui; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.join-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.code-input { text-transform: uppercase; letter-spacing: .14em; font-family: ui-monospace, monospace; }
.privacy-note { margin: 18px 0 0; text-align: center; color: var(--ink-soft); font: 12px ui-sans-serif, system-ui; }
.form-error { min-height: 18px; margin: 12px 0 0; color: var(--red); font: 13px ui-sans-serif, system-ui; }
.game-shell { min-height: calc(100vh - 82px); display: grid; grid-template-columns: minmax(500px, 1fr) 390px; }
.game-main { padding: 26px clamp(18px, 3vw, 48px) 36px; border-right: 1px solid var(--line); display: flex; flex-direction: column; align-items: center; }
.turn-banner { min-height: 42px; display: flex; align-items: center; gap: 10px; color: var(--ink-soft); font: 13px ui-sans-serif, system-ui; }
.turn-banner strong { color: var(--ink); }
.turn-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ink); }
.turn-dot.red { background: var(--red); }
.countdown { width: 38px; height: 38px; margin-left: 7px; display: grid; place-items: center; border-radius: 50%; color: var(--ink); background: rgba(255,255,255,.58); border: 1px solid var(--line); font: 700 14px ui-monospace, monospace; font-variant-numeric: tabular-nums; }
.countdown.urgent { color: white; background: var(--red); border-color: var(--red); animation: countdown-pulse 1s ease-in-out infinite; }
.countdown.paused { width: 52px; border-radius: 999px; color: white; background: var(--ink); border-color: var(--ink); font-family: ui-sans-serif, system-ui; font-size: 12px; }
@keyframes countdown-pulse { 50% { transform: scale(.94); box-shadow: 0 0 0 7px rgba(157,48,39,.09); } }
.board-stage { position: relative; width: min(100%, 680px); margin-top: 10px; padding: 12px; border-radius: 14px; background: #6a3e22; box-shadow: 0 22px 55px rgba(66,40,20,.24), inset 0 0 0 1px rgba(255,255,255,.13); }
#xiangqi-board { display: block; width: 100%; aspect-ratio: 9 / 10; border-radius: 6px; background: #d9b879; touch-action: manipulation; outline: none; }
#xiangqi-board:focus-visible { box-shadow: 0 0 0 4px rgba(157,48,39,.38); }
.check-alert { position: absolute; z-index: 3; top: 27px; right: 27px; display: flex; align-items: center; gap: 8px; padding: 7px 13px 7px 8px; border: 1px solid rgba(255,255,255,.78); border-radius: 999px; color: white; background: rgba(126,27,23,.94); box-shadow: 0 7px 24px rgba(80,10,7,.34); animation: check-strike .58s cubic-bezier(.2,.8,.2,1); font: 700 14px ui-sans-serif, system-ui; pointer-events: none; }
.check-alert span { width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.68); border-radius: 50%; font: 700 18px serif; }
@keyframes check-strike { 0% { opacity: 0; transform: scale(1.7) rotate(-7deg); } 65% { opacity: 1; transform: scale(.94) rotate(2deg); } 100% { transform: scale(1) rotate(0); } }
.board-help { margin: 12px 0 0; color: var(--ink-soft); font: 12px ui-sans-serif, system-ui; }
.game-sidebar { padding: 30px; background: rgba(255,253,247,.45); overflow: auto; }
.room-heading, .panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; }
.room-heading h1 { margin: 0; font-size: 23px; }
.icon-button { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; background: rgba(255,255,255,.54); color: var(--ink); font-size: 19px; }
.players-card { margin-top: 26px; padding: 16px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.5); }
.player-row { display: grid; grid-template-columns: 42px 1fr auto; gap: 12px; align-items: center; padding: 10px; border-radius: 12px; }
.player-row.active { background: rgba(157,48,39,.07); }
.player-row div { display: flex; flex-direction: column; gap: 3px; }
.player-row small { color: var(--ink-soft); font: 11px ui-sans-serif, system-ui; }
.piece-mini { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; background: #ead8ac; border: 2px solid currentColor; font-size: 19px; }
.piece-mini.red { color: var(--red); }
.piece-mini.black { color: var(--ink); }
.presence { width: 7px; height: 7px; border-radius: 50%; background: #aaa298; }
.presence.online { background: #4d8056; }
.players-divider { display: flex; justify-content: space-between; padding: 4px 10px; color: #9a8b78; font-size: 11px; letter-spacing: .2em; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.game-meta { display: grid; grid-template-columns: repeat(4,1fr); margin: 16px 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.game-meta div { padding: 13px 10px; text-align: center; border-right: 1px solid var(--line); }
.game-meta div:last-child { border-right: 0; }
.game-meta span, .game-meta strong { display: block; }
.game-meta span { color: var(--ink-soft); font: 10px ui-sans-serif, system-ui; }
.game-meta strong { margin-top: 5px; font-size: 14px; }
.moves-panel { margin-top: 24px; }
.panel-heading h2 { margin: 0; font-size: 21px; }
.panel-actions { display: flex; align-items: center; gap: 5px; }
.text-button { border: 0; padding: 6px; background: none; color: var(--red); font-size: 13px; }
.move-list { height: 176px; margin: 14px 0 0; padding: 12px 12px 12px 36px; overflow: auto; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font: 13px/1.8 ui-sans-serif, system-ui; }
.move-list li::marker { color: #a59b8d; font-size: 11px; }
.empty-state { color: var(--ink-soft); list-style: none; margin-left: -20px; }
.game-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 22px; }
.game-actions .wide { grid-column: 1 / -1; }
.game-message { min-height: 20px; margin: 13px 0 0; color: var(--red); text-align: center; font: 12px ui-sans-serif, system-ui; }
.game-mobile-header { display: none; }
.toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%); z-index: 10; padding: 12px 18px; border-radius: 999px; color: white; background: rgba(31,29,26,.92); font: 13px ui-sans-serif, system-ui; box-shadow: 0 14px 40px rgba(0,0,0,.2); }
.glossary-dialog { width: min(880px, calc(100vw - 28px)); max-height: min(820px, calc(100vh - 36px)); padding: clamp(22px, 4vw, 38px); border: 1px solid rgba(88,65,42,.24); border-radius: 22px; color: var(--ink); background: #f7efdf; box-shadow: 0 30px 100px rgba(38,24,12,.32); }
.glossary-dialog::backdrop { background: rgba(35,29,22,.48); backdrop-filter: blur(4px); }
.glossary-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.glossary-heading h2 { margin: 0; font-size: clamp(25px, 4vw, 36px); }
.glossary-intro { max-width: 680px; margin: 14px 0 20px; color: var(--ink-soft); font: 14px/1.8 ui-sans-serif, system-ui; }
.glossary-dialog input { position: sticky; top: -1px; z-index: 2; background: rgba(255,253,247,.94); }
.glossary-count { margin: 10px 2px 20px; color: var(--ink-soft); font: 12px ui-sans-serif, system-ui; }
.glossary-content { display: grid; gap: 26px; }
.term-section h3 { position: sticky; top: 61px; z-index: 1; margin: 0 0 10px; padding: 8px 0; color: var(--red); background: linear-gradient(90deg, #f7efdf 72%, transparent); font-size: 17px; }
.term-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.term-item { padding: 12px 14px; border: 1px solid var(--line); border-radius: 11px; background: rgba(255,255,255,.48); }
.term-item dt { color: var(--ink); font-weight: 700; }
.term-item dd { margin: 5px 0 0; color: var(--ink-soft); font: 12px/1.65 ui-sans-serif, system-ui; }
@media (max-width: 900px) {
  .lobby-shell { grid-template-columns: 1fr; }
  .intro-panel { padding: 50px 28px 38px; border-right: 0; border-bottom: 1px solid var(--line); }
  .intro-panel h1 { font-size: clamp(46px, 12vw, 70px); }
  .intro-copy { margin-top: 24px; }
  .rule-line { margin-top: 32px; }
  .entry-panel { padding: 34px 20px 60px; }
  .entry-card { margin: 0 auto; }
  .game-shell { grid-template-columns: 1fr; }
  .game-main { border-right: 0; padding-top: 14px; }
  .game-sidebar { border-top: 1px solid var(--line); }
  .room-heading { display: none; }
  .game-mobile-header { width: 100%; display: flex; align-items: center; justify-content: space-between; }
  .game-mobile-header div { text-align: center; }
  .game-mobile-header small, .game-mobile-header strong { display: block; }
  .game-mobile-header small { color: var(--ink-soft); font: 10px ui-sans-serif, system-ui; }
}
@media (max-width: 520px) {
  .topbar { height: 68px; padding: 0 18px; }
  .brand-seal { width: 36px; height: 36px; }
  .brand-copy small, .connection span { display: none; }
  .topbar-actions { gap: 9px; }
  .glossary-button { padding: 0 10px; }
  .lobby-shell { min-height: calc(100vh - 68px); }
  .intro-panel { padding-top: 38px; }
  .intro-panel h1 { font-size: 44px; }
  .intro-copy { font-size: 15px; }
  .entry-card { padding: 25px 20px; }
  .game-shell { min-height: calc(100vh - 68px); }
  .game-main { padding-left: 10px; padding-right: 10px; }
  .board-stage { padding: 7px; border-radius: 10px; }
  .game-sidebar { padding: 24px 18px 38px; }
  .turn-banner { width: 100%; }
  .turn-detail { display: none; }
  .panel-heading { align-items: flex-start; }
  .panel-actions { flex-direction: column; align-items: flex-end; }
  .term-grid { grid-template-columns: 1fr; }
  .check-alert { top: 17px; right: 17px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; } }