:root{
  /* Same design tokens as front/js/ui.js. Layout remains responsive. */
  --font-caption:12px;--font-small:14px;--font-body:16px;--font-heading:20px;--font-title:24px;--font-display:32px;
  --space-xs:4px;--space-sm:8px;--space-md:12px;--space-lg:16px;--space-xl:24px;--space-xxl:32px;
  --radius-small:8px;--radius-medium:12px;--radius-large:16px;
  --primary:#23483B;--primary-light:#3B6250;--gold:#C59A56;
  --paper:#F7F3EA;--paper-end:#E5ECE3;--cream:#FFFCF5;--ink:#20382E;--muted:#68776E;
  --sage:#E9EEE5;--border:#D8DFD4;--disabled:#E1E5DE;--disabled-text:#879087;
  --voice:#387456;--line:rgba(31,54,42,.13);--shadow:0 4px 8px rgba(30,46,35,.16);
  --font-family:"PingFang SC","Microsoft YaHei",sans-serif;--asset-version:28;
}
.recovery-bar{position:sticky;top:0;z-index:45;display:flex;align-items:center;flex-wrap:wrap;gap:12px;padding:16px;background:var(--cream);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}
.recovery-bar span{flex:1 1 240px;font-size:14px;line-height:1.6}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:var(--font-family);color:var(--ink);background:var(--paper)}
body{background-image:radial-gradient(circle at 5% 5%,rgba(255,255,255,.9),transparent 30%),linear-gradient(135deg,rgba(33,62,47,.035) 25%,transparent 25%);background-size:auto,32px 32px}
button,input{font:inherit}.shell{width:min(1180px,100%);min-height:100vh;margin:auto;padding:0 34px;display:flex;flex-direction:column}.topbar{height:94px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.brand{display:flex;gap:12px;align-items:center;color:inherit;text-decoration:none}.brand strong,.brand small{display:block}.brand strong{font-family:serif;font-size:var(--font-heading);letter-spacing:.12em}.brand small{font-size:var(--font-caption);letter-spacing:.22em;color:var(--muted);margin-top:3px}.brand-mark{width:38px;height:38px;position:relative;border:1px solid rgba(23,50,41,.25);transform:rotate(45deg)}.brand-mark i{position:absolute;width:10px;height:10px;border-radius:50%}.brand-mark i:first-child{background:#16211d;left:7px;top:7px}.brand-mark i:last-child{background:#fff;border:1px solid #b7b9b1;right:7px;bottom:7px}
.connection{font-size:var(--font-caption);color:var(--muted);display:flex;align-items:center;gap:8px}.connection span:first-child{width:7px;height:7px;border-radius:50%;background:#bb754e;box-shadow:0 0 0 5px rgba(187,117,78,.1)}.connection.online span:first-child{background:#438161;box-shadow:0 0 0 5px rgba(67,129,97,.1)}
main{flex:1}.lobby{min-height:calc(100vh - 145px);display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:9vw;padding:56px 5% 70px}.eyebrow{font-size:var(--font-caption);letter-spacing:.24em;font-weight:700;color:#75827b;margin:0 0 18px}.hero-copy h1{font:500 clamp(45px,6vw,80px)/1.15 "Songti SC","STSong",serif;letter-spacing:.06em;margin:0}.hero-copy h1 em{font-style:normal;color:#a87835}.intro{max-width:470px;line-height:1.9;color:var(--muted);margin:28px 0 0;font-size:var(--font-body)}
.lobby-card{background:rgba(251,248,239,.88);border:1px solid rgba(24,54,43,.1);border-radius:var(--radius-small);padding:34px;box-shadow:0 24px 70px rgba(27,48,38,.1)}label{display:block;font-size:var(--font-caption);font-weight:700;margin-bottom:9px}input{width:100%;height:50px;border:1px solid #cbd1c8;background:#fffdf8;border-radius:var(--radius-small);padding:0 15px;outline:none;color:var(--ink)}input:focus{border-color:#698674;box-shadow:0 0 0 3px rgba(105,134,116,.11)}button{border:0;cursor:pointer}.primary{width:100%;height:52px;background:var(--ink);color:#fff;border-radius:var(--radius-small);margin-top:14px;font-weight:700;letter-spacing:.1em}.primary span{float:right;margin-right:16px}.divider{height:54px;display:flex;align-items:center;color:#9aa19c;font-size:var(--font-caption)}.divider:before,.divider:after{content:"";height:1px;background:#dde0da;flex:1}.divider span{padding:0 13px}.join-row{display:flex;gap:8px}.join-row input{text-transform:uppercase;letter-spacing:.22em}.join-row button{width:74px;background:#dfe7dc;color:var(--ink);font-weight:700;border-radius:var(--radius-small)}
.server-hint{margin:13px 0 0;color:#8b948e;font-size:var(--font-caption);line-height:1.55}.server-hint span{font-weight:700;color:#657269;overflow-wrap:anywhere}
.game{padding:36px 0 28px}.hidden{display:none!important}.room-heading{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:18px}.room-heading .eyebrow{margin-bottom:5px}.room-heading h2{margin:0;font:500 25px serif}.room-heading h2 button{background:none;color:inherit;font-weight:inherit;padding:0;border-bottom:1px dashed #9ba59f}.share,.secondary{height:40px;padding:0 19px;background:var(--ink);color:#fff;border-radius:var(--radius-small);font-size:var(--font-small);font-weight:700}.players{display:grid;grid-template-columns:1fr auto 1fr;gap:22px;align-items:center;margin-bottom:18px}.player-card{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 4px}.player-card.opponent{justify-content:flex-end;text-align:right}.player-card small,.player-card strong{display:block}.player-card small{font-size:var(--font-caption);color:var(--muted);margin-bottom:3px}.player-card b{font-size:var(--font-caption);color:#4d8467;margin-left:auto}.player-card.opponent b{order:-1;margin-left:0;margin-right:auto}.stone{width:28px;height:28px;border-radius:50%;flex:none}.stone.black{background:radial-gradient(circle at 32% 27%,#637068,#111915 70%);box-shadow:0 3px 6px #999}.stone.white{background:radial-gradient(circle at 32% 27%,#fff,#d5d6cf 73%);box-shadow:0 3px 7px #aaa}.versus{font:12px serif;color:#869088;letter-spacing:.35em}
.board-wrap{width:min(66vh,680px,100%);margin:auto;padding:12px;background:#c9964e;border:1px solid rgba(76,52,22,.24);box-shadow:0 18px 45px rgba(31,40,30,.19)}#board{display:block;width:100%;aspect-ratio:1;background:#d9ad66;touch-action:manipulation;cursor:crosshair}.game-footer{min-height:72px;display:flex;justify-content:center;gap:30px;align-items:center;text-align:left}.game-footer>div{display:grid;grid-template-columns:auto 1fr;column-gap:10px}.game-footer strong{font:600 16px serif}.game-footer small{grid-column:2;color:var(--muted);margin-top:4px}.turn-dot{width:8px;height:8px;background:#8d9991;border-radius:50%;grid-row:1/3;margin-top:5px}.turn-dot.active{background:#3b7758;box-shadow:0 0 0 5px rgba(59,119,88,.1)}.secondary{background:#e0e6de;color:var(--ink)}footer{height:51px;border-top:1px solid var(--line);display:flex;gap:14px;align-items:center;justify-content:center;font-size:var(--font-caption);letter-spacing:.18em;color:#8b948e}
#toast{position:fixed;left:50%;bottom:34px;transform:translate(-50%,20px);padding:11px 20px;background:rgba(21,35,29,.92);color:#fff;border-radius:var(--radius-small);font-size:var(--font-small);opacity:0;pointer-events:none;transition:.25s}#toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:760px){.shell{padding:0 16px}.topbar{height:72px}.lobby{display:block;padding:48px 2px}.hero-copy h1{font-size:47px}.intro{margin-top:19px}.lobby-card{margin-top:38px;padding:24px}.game{padding-top:23px}.players{gap:8px}.versus{font-size:var(--font-caption);letter-spacing:.15em}.player-card{gap:8px}.stone{width:23px;height:23px}.board-wrap{padding:7px}.game-footer{justify-content:space-between}.room-heading h2{font-size:var(--font-heading)}.share{padding:0 14px}.player-card b{display:none}}
@media(max-height:720px) and (min-width:761px){.board-wrap{width:min(59vh,600px)}.game{padding-top:20px}.players{margin-bottom:10px}.room-heading{margin-bottom:10px}}

.play-area{display:grid;grid-template-columns:minmax(480px,680px) 320px;align-items:stretch;justify-content:center;gap:22px}.board-column{min-width:0}.play-area .board-wrap{width:100%;margin:0}.game-footer{justify-content:space-between}.game-actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}.game-actions button{height:38px;padding:0 13px}.game-actions .guide-active{background:#b64e3d;color:#fff;border-color:#b64e3d}.danger{height:38px;padding:0 13px;border:1px solid #cbb9ad;background:#f4e9e2;color:#8e432f;border-radius:var(--radius-small);font-size:var(--font-small);font-weight:700}
.chat-card{position:relative;min-height:0;border:1px solid var(--line);background:rgba(251,248,239,.9);display:flex;flex-direction:column;box-shadow:0 16px 42px rgba(31,40,30,.08)}.chat-title{height:62px;padding:0 16px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.chat-title strong,.chat-title small{display:block}.chat-title strong{font:600 16px serif}.chat-title small{color:var(--muted);font-size:var(--font-caption);margin-top:4px}.chat-tools{display:flex;gap:6px}.chat-title button{background:#e2e8df;color:var(--ink);width:34px;height:34px;border-radius:50%;font-size:18px}.barrage-settings{position:absolute;z-index:4;right:10px;top:55px;width:220px;padding:13px;border:1px solid var(--line);background:#fffdf8;box-shadow:0 12px 34px rgba(25,43,34,.18)}.barrage-settings label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 10px;font-size:var(--font-caption)}.barrage-settings label:last-child{margin:0}.barrage-settings input[type=checkbox]{width:17px;height:17px}.barrage-settings input[type=range]{width:105px;height:auto;padding:0}.barrage-settings select{height:29px;min-width:90px;border:1px solid #cbd1c8;background:#fffdf8;color:var(--ink)}.sticker-panel{padding:10px;display:grid;grid-template-columns:repeat(5,1fr);gap:5px;border-bottom:1px solid var(--line)}.sticker-panel button{height:38px;background:#fffaf0;border:1px solid #e5dfd1;border-radius:var(--radius-small);font-size:var(--font-heading)}.message-list{height:0;min-height:280px;flex:1;overflow-y:auto;padding:14px}.empty-chat{text-align:center;color:#9ba39e;font-size:var(--font-caption);margin:50% 0}.message{display:flex;flex-direction:column;align-items:flex-start;margin:0 0 13px}.message.mine{align-items:flex-end}.message header{font-size:var(--font-caption);color:#929a95;margin:0 4px 4px}.bubble{max-width:86%;background:#fff;padding:8px 11px;border:1px solid #e5e3db;border-radius:2px 9px 9px 9px;font-size:var(--font-small);line-height:1.55;overflow-wrap:anywhere}.mine .bubble{background:#dfe8dc;border-color:#d4dfd1;border-radius:9px 2px 9px 9px}.bubble.sticker{font-size:var(--font-display);background:transparent;border:0;padding:2px}.bubble.image{padding:3px;background:#fff}.bubble.image img{display:block;max-width:190px;max-height:190px;border-radius:var(--radius-small);cursor:pointer}.chat-form{display:grid;grid-template-columns:38px 1fr 52px;gap:6px;padding:10px;border-top:1px solid var(--line)}.chat-form input{height:40px;min-width:0}.chat-form button{border-radius:var(--radius-small);background:var(--ink);color:#fff;font-size:var(--font-caption);font-weight:700}.chat-form button:first-child{background:#e2e8df;color:var(--ink);font-size:22px}
.barrage-layer{position:fixed;z-index:18;inset:0;overflow:hidden;pointer-events:none}.barrage-item{position:absolute;max-width:min(280px,72vw);padding:9px 14px;border-radius:5px 17px 17px 17px;background:rgba(17,35,28,.9);color:#fff;font-size:var(--font-small);font-weight:700;line-height:1.45;box-shadow:0 6px 20px rgba(0,0,0,.2);will-change:transform}.speech-bubble:before{content:"";position:absolute;left:-7px;top:11px;border-width:6px 8px 6px 0;border-style:solid;border-color:transparent rgba(17,35,28,.9) transparent transparent}.interaction-fly{position:absolute;width:56px;height:56px;object-fit:contain;filter:drop-shadow(0 7px 8px rgba(0,0,0,.2));will-change:transform}.flower-bloom{position:absolute;width:96px;height:96px;display:grid;place-items:center;animation:bloom-pop 1.3s ease-out forwards}.flower-bloom img{width:76px;height:76px;object-fit:contain;animation:flower-open 1.05s cubic-bezier(.15,.8,.2,1) forwards}.flower-bloom i{--angle:0deg;position:absolute;width:12px;height:7px;border-radius:100% 0 100% 0;background:#ef5666;animation:petal-fly 1.15s ease-out forwards;transform:rotate(var(--angle)) translateX(20px)}.gift-splat{position:absolute;width:74px;height:74px;border-radius:50%;animation:splat-in 1.45s ease-out forwards}.gift-splat.egg{background:radial-gradient(circle,#ffd442 0 24%,rgba(255,246,213,.94) 26% 60%,transparent 62%)}.gift-splat.tomato{background:radial-gradient(circle,#d92f28 0 43%,rgba(224,51,42,.8) 45% 60%,transparent 62%)}.gift-splat i{position:absolute;width:15px;height:9px;border-radius:50%;background:inherit;left:29px;top:31px}.gift-splat i:nth-child(1){transform:translate(38px,-23px)}.gift-splat i:nth-child(2){transform:translate(-35px,-18px)}.gift-splat i:nth-child(3){transform:translate(31px,28px)}.gift-splat i:nth-child(4){transform:translate(-32px,30px)}.gift-splat i:nth-child(5){transform:translate(4px,-43px)}.gift-splat i:nth-child(6){transform:translate(-3px,43px)}.gift-hit{animation:gift-hit-shake .46s ease-out}@keyframes flower-open{0%{transform:scale(.08) rotate(-18deg);opacity:.2}55%{transform:scale(1.25) rotate(6deg);opacity:1}100%{transform:scale(1);opacity:1}}@keyframes bloom-pop{0%,75%{opacity:1}100%{opacity:0}}@keyframes petal-fly{0%{opacity:0;transform:rotate(var(--angle)) translateX(5px) scale(.3)}25%{opacity:1}100%{opacity:0;transform:rotate(var(--angle)) translateX(62px) scale(.8)}}@keyframes splat-in{0%{opacity:0;transform:scale(.15) rotate(-12deg)}18%{opacity:1;transform:scale(1.25) rotate(6deg)}38%{transform:scale(.95)}78%{opacity:.95}100%{opacity:0;transform:scale(1.04)}}@keyframes gift-hit-shake{0%,100%{transform:translate(0)}20%{transform:translate(-8px,2px) rotate(-3deg)}40%{transform:translate(8px,-2px) rotate(3deg)}60%{transform:translate(-5px,1px)}80%{transform:translate(4px,-1px)}}
.move-confirm{position:fixed;z-index:19;left:50%;bottom:18vh;transform:translateX(-50%);width:min(292px,calc(100vw - 32px));padding:12px 13px 11px;border:1px solid rgba(23,50,41,.2);border-radius:var(--radius-medium);background:rgba(255,253,248,.97);box-shadow:0 10px 32px rgba(17,35,28,.22);text-align:center;animation:move-confirm-in .16s ease-out}.move-confirm:after{content:"";position:absolute;left:50%;bottom:-7px;width:13px;height:13px;background:#fffdf8;border-right:1px solid rgba(23,50,41,.2);border-bottom:1px solid rgba(23,50,41,.2);transform:translateX(-50%) rotate(45deg)}.move-confirm>span{display:block;margin-bottom:9px;color:var(--ink);font-size:var(--font-small);font-weight:700}.move-confirm>div{display:grid;grid-template-columns:1fr 1.35fr;gap:7px}.move-confirm button{height:34px;border-radius:var(--radius-small);background:#e5e9e2;color:var(--ink);font-size:var(--font-caption);font-weight:700}.move-confirm button:last-child{background:var(--ink);color:#fff}@keyframes move-confirm-in{from{opacity:0;transform:translate(-50%,8px) scale(.97)}to{opacity:1;transform:translate(-50%,0) scale(1)}}
.modal{position:fixed;inset:0;background:rgba(15,28,22,.58);display:grid;place-items:center;padding:20px;z-index:20;backdrop-filter:blur(3px)}.modal-card{width:min(360px,100%);background:var(--cream);padding:30px;text-align:center;border-radius:var(--radius-small);box-shadow:0 25px 80px rgba(0,0,0,.25)}.modal-symbol{display:grid;place-items:center;width:48px;height:48px;border-radius:50%;margin:0 auto 15px;background:#e1e8dd;font-size:var(--font-title)}.modal-card h3{font:600 22px serif;margin:0 0 9px}.modal-card p{color:var(--muted);font-size:var(--font-small);line-height:1.7;margin:0 0 22px}.modal-card>div{display:grid;grid-template-columns:1fr 1fr;gap:9px}.modal-card .primary{margin:0;height:44px}.modal-card .secondary{height:44px}
@media(max-width:920px){.play-area{grid-template-columns:minmax(0,650px)}.chat-card{height:420px;margin-top:8px}.board-wrap{margin:auto}.game-footer{align-items:flex-start;padding:12px 0}.game-actions{max-width:55%}}
@media(max-width:560px){.game-actions{max-width:52%;gap:5px}.game-actions button{padding:0 9px;font-size:var(--font-caption)}.game-footer>div:first-child{max-width:44%}.game-footer small{font-size:var(--font-caption)}.chat-card{height:390px}.message-list{min-height:220px}.room-heading-actions{gap:5px}.voice-button,.share{padding:0 9px;font-size:var(--font-caption)}}
.spectator-count{display:inline-block;margin-left:7px;padding:4px 8px;border-radius:var(--radius-medium);background:#e5ebe1;color:#5f7065;font:600 11px sans-serif;vertical-align:middle}.room-heading-actions{display:flex;align-items:center;gap:8px}.voice-button{height:40px;padding:0 15px;border:1px solid #c8d2ca;background:#e2e8df;color:var(--ink);border-radius:var(--radius-small);font-size:var(--font-small);font-weight:700;transition:.2s}.voice-button.active{color:#fff;background:var(--voice);border-color:var(--voice);box-shadow:0 0 0 4px rgba(56,116,86,.1)}.voice-button.connecting{color:#7a5a2d;background:#f2e5ca;border-color:#ddc695}.voice-button:disabled{cursor:wait;opacity:.72}#remoteAudio,audio[data-player-id]{display:none}
.seat-avatar,.spectator-avatar{width:38px;height:38px;border-radius:50%;flex:none;display:grid;place-items:center;background:#c8954c center/cover;color:#fff;font-size:var(--font-small);font-weight:800;box-shadow:0 2px 8px rgba(30,45,35,.15)}.spectator-list{display:flex;gap:7px;overflow-x:auto;padding:9px 11px;border-bottom:1px solid var(--line);min-height:58px}.spectator-list>small{margin:auto;color:var(--muted);font-size:var(--font-caption)}.spectator{position:relative;min-width:120px;display:grid;grid-template-columns:32px 1fr;column-gap:7px;align-items:center;padding:5px 7px;border-radius:var(--radius-small);background:#edf0e9}.spectator-avatar{grid-row:1/3;width:32px;height:32px;object-fit:cover;font-size:var(--font-caption)}.spectator strong{font-size:var(--font-caption);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.spectator small{font-size:var(--font-caption);color:var(--muted)}
.shop-card>header p{margin:5px 0 0;color:#9a7138;font-size:var(--font-caption);font-weight:700}.shop-items{display:grid;gap:10px;padding:20px 26px 28px;overflow:auto}.shop-item{display:grid;grid-template-columns:62px 1fr auto;gap:14px;align-items:center;padding:13px;border:1px solid var(--line);border-radius:var(--radius-small);background:#fffdf8}.shop-item img{width:62px;height:62px;object-fit:contain}.shop-item strong,.shop-item small,.shop-item b{display:block}.shop-item small{margin:5px 0;color:var(--muted);font-size:var(--font-caption)}.shop-item b{color:#8b6839;font-size:var(--font-caption)}.shop-item button{height:38px;padding:0 12px;border-radius:var(--radius-small);background:var(--ink);color:#fff;font-size:var(--font-caption);font-weight:700}.interaction-card>div.interaction-choices{display:grid;grid-template-columns:1fr;gap:7px;max-height:45vh;overflow:auto;margin-bottom:12px}.interaction-choices button{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:var(--radius-small);background:#edf0e9;color:var(--ink);text-align:left}.interaction-choices button:disabled{opacity:.45}.interaction-choices img{width:42px;height:42px;object-fit:contain}.interaction-choices span,.interaction-choices small{display:block}.interaction-choices small{margin-top:3px;color:var(--muted);font-size:var(--font-caption)}.interaction-card>button{width:100%}
@media(max-width:560px){.seat-avatar{width:30px;height:30px}.shop-items{padding:13px}.shop-item{grid-template-columns:52px 1fr}.shop-item img{width:52px;height:52px}.shop-item button{grid-column:1/3}.spectator{min-width:105px}}
.top-actions{display:flex;align-items:center;gap:14px}.text-button,.back-button{padding:0;background:none;color:var(--muted);font-size:var(--font-caption)}.text-button:hover,.back-button:hover{color:var(--ink)}.user-summary{font-size:var(--font-caption);color:var(--ink);padding-left:12px;border-left:1px solid var(--line)}
.platform{padding:72px 5% 90px}.platform-heading{max-width:650px;margin-bottom:38px}.platform-heading h1{font:500 clamp(38px,5vw,64px)/1.2 serif;margin:0 0 17px}.platform-heading>p:last-child{color:var(--muted);line-height:1.8}.game-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.game-card{min-height:170px;padding:27px;text-align:left;border:1px solid var(--line);background:rgba(251,248,239,.86);display:grid;grid-template-columns:auto 1fr;gap:19px;align-items:center;box-shadow:0 15px 44px rgba(28,48,37,.07);transition:.2s}.game-card:hover{transform:translateY(-4px);box-shadow:0 22px 55px rgba(28,48,37,.12)}.game-card>span{display:grid;place-items:center;width:62px;height:62px;border-radius:50%;background:#d7ad68;color:#45321e;font:600 29px serif}.game-card strong,.game-card small{display:block}.game-card strong{font:600 23px serif}.game-card small{color:var(--muted);font-size:var(--font-caption);margin-top:7px}.game-card b{grid-column:2;color:#98703b;font-size:var(--font-caption)}
.back-button{margin-bottom:30px}.online-rooms{margin-top:34px;max-width:520px}.rooms-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.room-list{display:grid;gap:8px;max-height:250px;overflow:auto}.room-list>p{color:var(--muted);font-size:var(--font-caption)}.room-item{display:grid;grid-template-columns:1fr auto;align-items:center;padding:12px 14px;border:1px solid var(--line);background:rgba(255,255,255,.48);color:var(--ink);text-align:left}.room-item strong,.room-item small{display:block}.room-item small{color:var(--muted);margin-top:4px;font-size:var(--font-caption)}.room-item b{color:#966c34;font-size:var(--font-caption)}
.auth-modal{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:20px;background:rgba(14,29,22,.7);backdrop-filter:blur(7px)}.auth-card{width:min(420px,100%);max-height:calc(100vh - 30px);overflow:auto;background:var(--cream);padding:30px;border-radius:var(--radius-small);box-shadow:0 28px 90px rgba(0,0,0,.3)}.auth-brand{display:flex;align-items:center;gap:14px;margin-bottom:24px}.auth-brand strong,.auth-brand small{display:block}.auth-brand strong{font:600 20px serif}.auth-brand small{font-size:var(--font-caption);color:var(--muted);margin-top:4px}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line);margin-bottom:22px}.auth-tabs button{height:42px;background:none;color:var(--muted);border-bottom:2px solid transparent}.auth-tabs button.active{color:var(--ink);border-color:var(--ink);font-weight:700}.auth-form h2{font:500 25px serif;margin:0 0 21px}.auth-form label{margin-top:13px}.auth-form label input{display:block;margin-top:7px}.auth-error{min-height:20px;color:#a74636;font-size:var(--font-caption);margin:13px 0 0;text-align:center}.stone.red{background:radial-gradient(circle at 32% 27%,#de6655,#8f201c 73%);box-shadow:0 3px 7px #aaa}
.history-modal{position:fixed;inset:0;z-index:46;display:grid;place-items:center;padding:20px;background:rgba(14,29,22,.62);backdrop-filter:blur(5px)}.history-card{width:min(760px,100%);max-height:min(780px,calc(100vh - 30px));display:flex;flex-direction:column;overflow:hidden;background:var(--cream);border-radius:var(--radius-medium);box-shadow:0 28px 90px rgba(0,0,0,.3)}.history-card>header{display:flex;align-items:center;justify-content:space-between;padding:24px 26px 17px;border-bottom:1px solid var(--line)}.history-card>header small{display:block;color:var(--muted);font-size:var(--font-caption);font-weight:700;letter-spacing:.2em}.history-card h2{margin:4px 0 0;font:600 25px serif}.history-card>header button{width:36px;height:36px;border-radius:50%;background:#e5e9e2;color:var(--ink);font-size:var(--font-title);line-height:1}.history-filters{display:flex;gap:7px;overflow-x:auto;padding:13px 26px;border-bottom:1px solid var(--line)}.history-filters button{flex:none;height:32px;padding:0 14px;border-radius:var(--radius-large);background:#e7ebe4;color:var(--muted);font-size:var(--font-caption);font-weight:700}.history-filters button.active{background:var(--ink);color:#fff}.history-list{min-height:220px;overflow:auto;padding:10px 26px 20px}.history-empty{margin:70px 0;text-align:center;color:var(--muted);font-size:var(--font-small)}.match-row{display:grid;grid-template-columns:76px minmax(0,1fr) auto;gap:15px;align-items:center;padding:16px 2px;border-bottom:1px solid var(--line)}.match-game{width:70px;height:54px;display:grid;place-items:center;border-radius:var(--radius-small);background:#e2e8df;color:var(--ink);font:600 13px serif}.match-info strong,.match-info small{display:block}.match-info strong{font-size:var(--font-small);margin-bottom:6px}.match-info small{color:var(--muted);font-size:var(--font-caption);line-height:1.55}.match-result{text-align:right}.match-result b{display:inline-block;padding:5px 9px;border-radius:var(--radius-medium);background:#e7ebe4;color:#68756d;font-size:var(--font-caption)}.match-result b.win{background:#dceadf;color:#2f7250}.match-result b.loss{background:#f2e0dc;color:#9b493b}.match-result small{display:block;margin-top:7px;color:var(--muted);font-size:var(--font-caption)}.history-more{flex:none;height:42px;margin:0 26px 20px;border:1px solid var(--line);background:#e7ebe4;color:var(--ink);border-radius:var(--radius-small);font-size:var(--font-caption);font-weight:700}
@media(max-width:820px){.game-grid{grid-template-columns:1fr}.platform{padding:48px 0}.game-card{min-height:130px}.top-actions .user-summary{display:none}.lobby{gap:35px}.online-rooms{max-width:none}}
@media(max-width:560px){.history-modal{padding:10px}.history-card{max-height:calc(100vh - 20px)}.history-card>header{padding:19px 17px 14px}.history-filters{padding:11px 17px}.history-list{padding:5px 17px 16px}.match-row{grid-template-columns:58px minmax(0,1fr) auto;gap:10px;padding:14px 0}.match-game{width:56px;height:48px;font-size:var(--font-caption)}.match-info strong{font-size:var(--font-caption)}.match-result small{display:none}.history-more{margin:0 17px 16px}.top-actions{gap:9px}.top-actions .text-button{font-size:var(--font-caption)}}
.user-avatar{width:38px;height:38px;padding:0;border-radius:50%;overflow:hidden;background:#d9ad66;color:#fff;font-weight:800;border:2px solid rgba(23,50,41,.13);flex:none}.user-avatar img{width:100%;height:100%;object-fit:cover;display:block}.seat-select{display:flex;align-items:center;justify-content:space-between;margin:12px 0 0;color:var(--muted)}.seat-select select{height:38px;min-width:110px;border:1px solid #cbd1c8;background:#fffdf8;color:var(--ink);padding:0 10px}.multi-players{display:flex;gap:8px;overflow-x:auto;padding:5px 0 15px;margin-bottom:10px}.multi-player{min-width:145px;display:grid;grid-template-columns:30px 1fr;column-gap:9px;align-items:center;padding:9px 11px;border:1px solid var(--line);background:rgba(255,255,255,.45)}.multi-player.active{border-color:#99804e;box-shadow:0 0 0 2px rgba(153,128,78,.12)}.multi-player .mini-avatar{grid-row:1/3;width:30px;height:30px;border-radius:50%;object-fit:cover;background:#d9ad66;color:#fff;display:grid;place-items:center;font-size:var(--font-caption);font-weight:800}.multi-player strong{font-size:var(--font-caption);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.multi-player small{font-size:var(--font-caption);color:var(--muted)}

#endTurnButton { background: #23372e; color: #fff8e9; border-color: #23372e; }
#endTurnButton:disabled { opacity: .5; cursor: not-allowed; }

/* Shared WeChat visual language: warm paper, pine green, soft rounded surfaces. */
body{background:linear-gradient(160deg,var(--paper),var(--paper-end));background-attachment:fixed}
button,input,select{font-family:var(--font-family)}
button{transition:background .15s,box-shadow .15s,transform .15s}
button:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.lobby-card,.chat-card,.game-card,.auth-card,.history-card,.modal-card,.move-confirm{border-radius:var(--radius-large);background:var(--cream);box-shadow:var(--shadow)}
.primary,.share,.chat-form button[type=submit],.shop-item button,.move-confirm button:last-child,#endTurnButton{background:linear-gradient(var(--primary-light),var(--primary));color:var(--cream);border-radius:var(--radius-medium);box-shadow:var(--shadow);font-size:var(--font-small);font-weight:600}
.secondary,.voice-button,.join-row button,.move-confirm button:first-child,.history-more,.interaction-choices button{background:linear-gradient(var(--cream),var(--sage));color:var(--ink);border:1px solid var(--border);border-radius:var(--radius-medium);box-shadow:var(--shadow);font-size:var(--font-small);font-weight:600}
button:not(:disabled):active{transform:translateY(1px);box-shadow:none}
.primary:not(:disabled):active,.share:not(:disabled):active,.secondary:not(:disabled):active,.voice-button:not(:disabled):active,.join-row button:not(:disabled):active,.move-confirm button:not(:disabled):active{background:var(--primary);color:var(--cream)}
button:disabled,#endTurnButton:disabled,.voice-button:disabled,.interaction-choices button:disabled{background:var(--disabled);color:var(--disabled-text);border-color:var(--border);box-shadow:none;opacity:1;cursor:not-allowed;transform:none}
.voice-button.active,.game-actions .guide-active{background:var(--primary);color:var(--cream)}
.board-wrap{padding:0;border:0;border-radius:var(--radius-large);background:transparent;box-shadow:var(--shadow);overflow:hidden}
#board{height:auto;border-radius:var(--radius-large);background:transparent}
.brand strong,.game-card strong,.room-heading h2,.auth-form h2,.history-card h2{font-family:var(--font-family);font-weight:700;letter-spacing:0}
.brand strong{font-size:var(--font-heading)}.game-card strong,.room-heading h2{font-size:var(--font-title)}
.game-footer strong,.chat-title strong{font:700 var(--font-body) var(--font-family)}
.game-card>span,.user-avatar,.multi-player .mini-avatar{background:var(--gold)}
.game-card{border-radius:var(--radius-large);padding:var(--space-xl);gap:var(--space-lg)}
.game-grid{gap:var(--space-lg)}.play-area{gap:var(--space-xl)}
.player-card strong{overflow-wrap:anywhere}.player-card>div{min-width:0}
.game-actions{gap:var(--space-sm)}.game-actions button{border-radius:var(--radius-medium)}
.room-heading{gap:var(--space-lg)}.topbar{gap:var(--space-lg)}
.message header,.game-footer small,.game-card small,.player-card small{font-size:var(--font-caption);color:var(--muted)}
img{image-rendering:auto}img.pixel-art{image-rendering:pixelated}
@media(max-width:560px){
  .shell{padding-inline:var(--space-lg)}
  .topbar{height:auto;min-height:72px;flex-wrap:wrap;padding-block:var(--space-lg);gap:var(--space-md)}
  .top-actions{flex-wrap:wrap;gap:var(--space-sm)}
  .room-heading{align-items:flex-start;flex-direction:column;gap:var(--space-md)}
  .room-heading-actions{flex-wrap:wrap;gap:var(--space-sm)}
  .game-footer{flex-direction:column;gap:var(--space-lg);align-items:stretch;padding-block:var(--space-lg)}
  .game-footer>div:first-child,.game-actions{max-width:100%}
  .game-actions{justify-content:flex-start}.game-actions button{min-height:40px;padding-inline:var(--space-md)}
  .lobby-card,.auth-card{padding:var(--space-xl)}
}
@media(prefers-reduced-motion:reduce){button{transition:none}.game-card:hover,button:not(:disabled):active{transform:none}}

.hero-copy h1,.platform-heading h1{font:700 var(--font-display)/1.3 var(--font-family);letter-spacing:0}.hero-copy h1 em{color:var(--gold)}
/* Keep actions as a wrapping row instead of inheriting the status text grid. */
.game-footer>.game-actions{display:flex;flex-wrap:wrap;gap:var(--space-sm)}
@media(max-width:560px){
  .player-card{gap:var(--space-sm)}
  .player-card .stone{width:16px;height:16px}
  .player-card strong{font-size:var(--font-small);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
}

/* Cross-platform component contract: see docs/ui-design.md. */
body{background:linear-gradient(180deg,var(--paper),var(--paper-end));background-attachment:fixed}
.brand-mark{display:none}.brand strong{letter-spacing:0}.brand small{letter-spacing:0}
.topbar{min-height:80px;height:auto;padding-block:16px;flex-wrap:wrap}
.top-actions{flex-wrap:wrap;gap:12px}.text-button,.back-button{min-height:36px}
.lobby{display:flex;flex-direction:column;align-items:stretch;gap:24px;width:min(100%,640px);min-height:0;margin:0 auto;padding:32px 0 48px}
.lobby .hero-copy h1{font:700 var(--font-heading)/1.5 var(--font-family);margin:0 0 16px}
.lobby .eyebrow,.lobby .back-button{display:none}
.game-switcher{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 12px}
.game-choice{min-height:44px;border:1px solid var(--border);border-radius:var(--radius-medium);background:linear-gradient(var(--cream),var(--sage));color:var(--ink);font-size:var(--font-small);font-weight:600;box-shadow:0 2px 8px rgba(30,46,35,.16)}
.game-choice[aria-pressed=true]{background:linear-gradient(var(--primary-light),var(--primary));color:var(--cream);border-color:var(--primary)}
.lobby-card{margin:0;padding:0;background:transparent;border:0;box-shadow:none}
.lobby-card .primary{height:44px;margin:0;letter-spacing:0}.lobby-card .divider{height:40px}
.join-row input,.join-row button{height:44px;border-radius:var(--radius-medium)}
.online-rooms{margin:0;max-width:none}.rooms-heading{margin-bottom:12px}.rooms-heading strong{font-size:var(--font-small)}
.room-list{max-height:360px;gap:8px;padding:2px 0 8px}.room-list>p{padding:24px 16px;margin:0;background:var(--cream);border:1px solid var(--border);border-radius:var(--radius-medium);text-align:center;line-height:1.7}
.room-item{min-height:66px;padding:10px 12px;background:var(--cream);border:1px solid var(--border);border-radius:var(--radius-small);gap:12px}
.room-item>span{min-width:0}.room-item strong{font-size:var(--font-small)}.room-item b{min-width:62px;padding:10px 12px;border-radius:var(--radius-medium);background:linear-gradient(var(--primary-light),var(--primary));color:var(--cream);text-align:center;white-space:nowrap}
.player-card{background:transparent;border:0;padding:8px 0}
.room-heading .eyebrow{display:none}
.chat-card,.history-card,.auth-card,.modal-card{border:1px solid var(--border)}
.game-card{min-height:112px;box-shadow:var(--shadow)}.game-card:hover{transform:none;border-color:var(--primary)}
.auth-brand strong{font-family:var(--font-family)}
@media(max-width:560px){
  .shell{padding-inline:22px}.topbar{gap:8px}.top-actions{width:100%;gap:8px}
  .brand strong{font-size:var(--font-heading)}.brand small{display:none}
  .lobby{padding:24px 0 32px;gap:20px}.lobby-card{padding:0}
  .game{padding-top:16px}.player-card{padding:8px 0}
  .room-heading{gap:8px;margin-bottom:8px}.room-heading h2{font-size:var(--font-body)}
  .room-heading-actions .share,.room-heading-actions .voice-button{height:36px;font-size:var(--font-caption)}
  .game-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .game-card{padding:16px;display:flex;flex-direction:column;align-items:flex-start;gap:12px}
  .game-card strong{font-size:var(--font-body)}.game-card>span{width:36px;height:36px;font-size:20px}
  .platform{padding:24px 0}.platform-heading h1{font-size:var(--font-heading)}
}