:root{--bg:#f4f2eb;--card:#fffefa;--text:#252d28;--muted:#8c968d;--line:#e9ece4;--green:#315e4b;--soft:#edf3ed;--board:#dfbd81;--board-line:#947447;--shadow:0 12px 35px #344b3710}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;font-size:14px;transition:.2s}body.dark{--bg:#18201c;--card:#222d26;--text:#eef2e9;--muted:#96a79a;--line:#34433a;--green:#8fbea0;--soft:#2b3b30;--board:#a17b48;--board-line:#624923;--shadow:0 12px 35px #0002}button,select,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid #9bbd85;outline-offset:3px}.app{max-width:1440px;margin:auto;padding:0 7.2%}header{height:88px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{display:flex;gap:11px;align-items:center;color:var(--text);text-decoration:none;font-family:serif;font-weight:bold;font-size:23px;letter-spacing:3px}.brand small{display:block;font:8px sans-serif;letter-spacing:2.1px;margin-top:3px}.brand-mark{display:grid;place-items:center;background:#315e4b;color:#fff;width:38px;height:38px;font-size:23px;letter-spacing:0}.header-right{display:flex;align-items:center;gap:27px}.header-note{font-size:12px;color:var(--muted);letter-spacing:1px}.header-note i,.live-pill span:first-child,.board-footer i{display:inline-block;width:7px;height:7px;background:#80aa86;border-radius:50%;margin-right:7px}.icon-btn{border:1px solid var(--line);border-radius:50%;width:38px;height:38px;color:var(--text);background:var(--card);font-size:19px}.intro{display:flex;justify-content:space-between;align-items:end;padding:54px 0 31px}.eyebrow,.section-label{font-size:10px;font-weight:700;letter-spacing:1.7px;color:var(--green)}.eyebrow span{display:inline-block;width:25px;height:1px;background:var(--green);vertical-align:middle;margin-right:8px}.intro h1{font-family:serif;font-size:38px;letter-spacing:3px;margin:16px 0 12px;font-weight:600}.intro h1 em{font-style:normal;color:var(--green)}.intro p{color:var(--muted);margin:0;letter-spacing:.6px;font-size:13px}.intro-side{text-align:right;color:var(--muted);font-size:10px;letter-spacing:1.4px}.intro-side b{display:block;color:var(--text);font-family:serif;font-size:16px;letter-spacing:3px;margin-top:10px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:22px;align-items:start}.game-card,.side-card,.stats-card{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:5px}.game-card{padding:26px 31px 21px}.game-top,.card-heading,.stats-head{display:flex;justify-content:space-between;align-items:center}.section-label span{color:#adb7ae;font-weight:400;letter-spacing:1px}.game-top h2,.card-heading h3,.stats-head h3{font-family:serif;margin:8px 0 0;letter-spacing:1px}.game-top h2{font-size:23px}.live-pill{background:var(--soft);color:var(--green);border-radius:20px;padding:8px 12px;font-size:11px}.players{display:flex;align-items:center;margin:22px 0 20px;gap:12px}.player{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:4px;flex:1;min-width:0}.player.active{border-color:#adc9b2;background:var(--soft)}.avatar{width:32px;height:32px;border-radius:50%;flex-shrink:0}.black-stone{background:radial-gradient(circle at 30% 25%,#59605a,#151a18 70%);box-shadow:0 2px 3px #0004}.white-stone{background:radial-gradient(circle at 30% 25%,#fff,#e5e6de 70%);box-shadow:0 1px 4px #0003}.player b,.player small{display:block}.player b{font-size:12px}.player small{font-size:10px;color:var(--muted);margin-top:4px}.player strong{font-size:13px;font-weight:500;margin-left:auto;font-variant-numeric:tabular-nums}.versus{font:italic 12px serif;color:#aab3a8}.board-wrap{display:flex;justify-content:center}.board-frame{width:min(100%,590px);padding:5.2%;background:var(--board);border:1px solid #b89864;box-shadow:inset 0 0 35px #70512c24,0 4px 9px #694a2522}.board{position:relative;aspect-ratio:1;display:grid;grid-template-columns:repeat(15,1fr);grid-template-rows:repeat(15,1fr);background:linear-gradient(var(--board-line),var(--board-line)) center/100% 1px no-repeat;touch-action:manipulation}.board:before{content:"";position:absolute;inset:3.333%;background-image:linear-gradient(to right,var(--board-line) 1px,transparent 1px),linear-gradient(to bottom,var(--board-line) 1px,transparent 1px);background-size:calc(100% / 14) calc(100% / 14);border-right:1px solid var(--board-line);border-bottom:1px solid var(--board-line);pointer-events:none}.cell{position:relative;border:0;background:transparent;padding:0;display:grid;place-items:center}.cell.star:before{content:"";position:absolute;width:5px;height:5px;background:var(--board-line);border-radius:50%}.stone{width:90%;height:90%;border-radius:50%;z-index:1}.stone.last:after{content:"";display:block;width:20%;height:20%;background:#bf6953;border-radius:50%;position:relative;top:40%;left:40%}.board-footer{display:flex;justify-content:space-between;margin-top:19px;color:var(--muted);font-size:11px}.board-footer span:first-child{color:var(--green)}aside{display:grid;gap:16px}.side-card{padding:23px}.card-heading h3,.stats-head h3{font-size:19px}.heading-icon{font-size:19px;color:var(--green)}.mode-tabs{display:flex;background:var(--bg);padding:4px;margin:22px 0 19px;border-radius:4px}.mode{width:50%;border:0;background:transparent;color:var(--muted);padding:10px 4px;font-size:12px}.mode.active{background:var(--card);color:var(--green);box-shadow:0 1px 4px #0001;font-weight:700}.field-label{display:block;font-size:11px;color:var(--muted);margin-bottom:8px}select,input{width:100%;background:var(--card);color:var(--text);border:1px solid var(--line);border-radius:3px;padding:12px;outline:none}select{appearance:auto}.primary{width:100%;background:#315e4b;color:white;border:0;border-radius:3px;padding:14px 15px;display:flex;justify-content:space-between;margin-top:12px;font-weight:600;font-size:12px}.primary:hover{background:#244d3a}.toggle-row{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);margin-top:20px;padding-top:17px;cursor:pointer}.toggle-row b,.toggle-row small{display:block}.toggle-row b{font-size:12px}.toggle-row small{font-size:10px;color:var(--muted);margin-top:6px}.toggle-row input{position:absolute;opacity:0;width:1px}.switch{width:34px;height:19px;border-radius:15px;background:#ccd5ca;position:relative}.switch:after{content:"";position:absolute;width:15px;height:15px;top:2px;left:2px;background:white;border-radius:50%;transition:.2s}.toggle-row input:checked+.switch{background:#618e70}.toggle-row input:checked+.switch:after{left:17px}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:18px}.tool-grid button,.secondary,.replay-controls button,.request button{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:3px;padding:11px;font-size:11px}.tool-grid button:hover,.secondary:hover{background:var(--soft)}.tool-grid button span{color:var(--green);font-size:16px;margin-right:8px}.stats-card{padding:23px;background:#e7eee5}.dark .stats-card{background:#2b4032}.stats-head>span{font-size:26px;color:#739679}.stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:23px}.stats div+div{border-left:1px solid #bdcfc1;padding-left:20px}.stats b,.stats small{display:block}.stats b{font:24px serif;color:var(--green)}.stats small{font-size:10px;color:var(--muted);margin-top:6px}.aside-note{color:var(--muted);font-size:11px;text-align:center;padding:5px}.aside-note span{color:var(--green);margin-right:5px}.hint{color:var(--muted);font-size:11px;line-height:1.7}.join-row{display:flex;gap:8px;margin-top:10px}.join-row input{text-transform:uppercase;min-width:0}.room-info{background:var(--soft);padding:10px;margin-top:10px;font-size:11px;color:var(--green)}.room-info b{letter-spacing:2px;margin-left:8px}.room-info button{float:right;border:0;background:none;color:var(--green)}.replay-controls,.request{display:flex;align-items:center;justify-content:space-between;gap:5px;margin-top:12px;font-size:11px}.request{background:var(--soft);padding:8px}.request span{margin-right:auto}[hidden]{display:none!important}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:27px 0;color:var(--muted);font-size:10px;letter-spacing:1px;margin-top:40px}#toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);background:#263b2e;color:white;padding:11px 18px;border-radius:4px;opacity:0;transition:.2s;pointer-events:none;z-index:3;white-space:nowrap}#toast.show{opacity:1;transform:translate(-50%,0)}@media(max-width:850px){.app{padding:0 5%}.workspace{grid-template-columns:1fr}.intro{padding:38px 0 25px}aside{grid-template-columns:1fr 1fr}.stats-card{grid-column:span 2}.aside-note{grid-column:span 2}.board-frame{width:min(100%,590px)}}@media(max-width:520px){header{height:70px}.header-note,.intro-side{display:none}.intro h1{font-size:27px;letter-spacing:1px}.intro p{font-size:11px;line-height:1.8}.game-card{padding:20px 15px}.players{gap:5px}.player{padding:8px 6px;gap:6px}.avatar{width:26px;height:26px}.player strong{font-size:11px}.board-frame{padding:5%}aside{grid-template-columns:1fr}.stats-card,.aside-note{grid-column:auto}.side-card,.stats-card{padding:20px}footer span:last-child{display:none}}