@charset "UTF-8";
:root{font-family:system-ui,-apple-system,"Microsoft YaHei",sans-serif;color:#273e38;background:#f3f1e9;font-synthesis:none;--green:#254e42;--line:#dbdfd6;--muted:#6e7c75}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;border:1px solid #cdd5cc;border-radius:8px;background:#fffef9;padding:10px 14px;color:var(--green);transition:background .15s}button:hover:not(:disabled){background:#e9efe7}button:focus-visible,a:focus-visible{outline:3px solid #ab7336;outline-offset:3px}button:disabled{opacity:.45;cursor:not-allowed}a{color:inherit}input,textarea,select{width:100%;border:1px solid #cdd5cc;border-radius:8px;background:#fffdf6;padding:10px;color:#213d34}textarea{resize:vertical}label{display:grid;gap:7px;margin:14px 0;font-size:13px}h1,h2,p{margin-top:0}[hidden]{display:none!important}.shell{max-width:1160px;margin:auto;padding:0 28px}.masthead{display:flex;justify-content:space-between;align-items:center;padding:28px 0;border-bottom:1px solid var(--line);gap:10px}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;font-size:16px;font-weight:600}.brand-mark{display:grid;place-items:center;width:44px;height:44px;background:var(--green);color:#faf6e4;font-family:serif;font-size:30px;border-radius:50%}.brand small{display:block;font-size:11px;font-weight:400;color:var(--muted);margin-top:5px;letter-spacing:1px}.other{font-size:13px;text-decoration:none;white-space:nowrap}.intro{padding:37px 0 24px;display:flex;align-items:end;justify-content:space-between;gap:12px}.eyebrow{font-size:10px;letter-spacing:2px;color:#8b7b57}.intro h1{font-family:serif;font-size:43px;font-weight:600;letter-spacing:5px;margin:7px 0}.intro p{color:var(--muted);font-size:14px;margin:0}.tag{font-size:11px;border:1px solid var(--line);padding:7px 12px;border-radius:20px;white-space:nowrap}.modes{display:flex;gap:6px;margin:0 0 23px;background:#e6e9df;border-radius:11px;padding:5px;max-width:560px}.modes button{flex:1;border:0;background:transparent;white-space:nowrap;font-size:14px;padding:11px}.modes [aria-pressed=true]{background:var(--green);color:#fff}.modes button:hover{background:#d5ddd0}.layout{display:grid;grid-template-columns:minmax(0,1fr) 306px;gap:25px;align-items:start}.play-card{border:1px solid var(--line);padding:23px;background:#fffef8;border-radius:14px;box-shadow:0 8px 28px #213d3407}.play-heading{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);gap:8px}.state{font-size:18px;font-weight:600;margin:13px 0 22px;min-height:26px}.board{display:grid;grid-template-columns:repeat(var(--columns),minmax(0,1fr));width:100%;margin:0 auto 20px;padding:9px;border:8px solid #9d794f;box-shadow:inset 0 0 0 1px #5f472d,0 6px 15px #4d352b13;background:#dfbd87;border-radius:4px;position:relative}.board .cell{position:relative;border:none;border-radius:0;min-width:0;padding:0;display:grid;place-items:center;background:transparent;aspect-ratio:1;outline-offset:-2px;color:#2f3f38}.cell::before{content:"";position:absolute;inset:0;background:linear-gradient(#856947,#856947) center/100% 1px no-repeat,linear-gradient(#856947,#856947) center/1px 100% no-repeat;pointer-events:none}.xiangqi .cell{aspect-ratio:1.05}.xiangqi .cell::before{background:linear-gradient(#967b54,#967b54) center/100% 1px no-repeat,linear-gradient(#967b54,#967b54) center/1px 100% no-repeat}.piece{position:relative;border-radius:50%;display:grid;place-items:center;width:90%;height:90%;font-family:"KaiTi","STKaiti",serif;font-size:clamp(15px,3vw,30px);font-weight:bold;background:radial-gradient(circle at 35% 25%,#fff0cd,#dfb169);border:2px solid currentColor;box-shadow:0 2px 2px #402b2850,inset 0 0 0 2px #f7dca7;line-height:1}.red{color:#a82f25}.black{color:#293f37}.chosen{box-shadow:inset 0 0 0 3px #c07332}.legal::after{content:"";position:absolute;inset:39%;background:#335e56a6;border-radius:50%;pointer-events:none}.last::after{content:"";position:absolute;inset:8%;border:2px solid #e28d21;border-radius:3px;pointer-events:none}.gomoku .last::after{inset:39%;background:#cb553e;border:0;border-radius:50%}.stone{position:relative;width:83%;height:83%;border-radius:50%;box-shadow:1px 2px 3px #59401d65}.dark{background:radial-gradient(circle at 30% 25%,#666,#0c1512 75%)}.light{background:radial-gradient(circle at 30% 25%,#fff,#f0eadb 75%);border:1px solid #baad95}.actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:center}.actions button{font-size:12px;padding:9px 11px}.notice{font-size:12px;line-height:1.7;color:var(--muted);margin:18px 0 0;min-height:20px}.side{display:grid;gap:16px}.panel{border:1px solid var(--line);background:#f9faf4;border-radius:12px;padding:22px}.panel h2{font-size:18px;font-family:serif;margin:10px 0 13px}.panel p{font-size:12px;color:var(--muted);line-height:1.8;margin-bottom:0}.primary{width:100%;background:var(--green);color:#fff;border-color:var(--green);margin-top:17px}.primary:hover:not(:disabled){background:#386553}.path{border-top:1px solid var(--line);padding-top:12px;color:#326553!important}.brief>span{font-size:11px;color:#89764c}.invitation{margin-top:18px;text-align:center}.invitation canvas{display:block;width:100%!important;height:auto!important;max-width:260px;margin:auto;border-radius:8px}.invitation input{font-size:11px}.join{margin-top:20px}.join summary,details summary{font-size:12px;cursor:pointer;line-height:1.8}#leave{margin-top:15px}pre{max-height:180px;overflow:auto;white-space:pre-wrap;font-size:11px;line-height:1.8}.request{margin-top:18px;padding:15px;background:#eef2e3;border-radius:8px;font-size:13px}.request>div{display:flex;gap:8px;margin-top:10px}footer{text-align:center;margin:35px 0 25px;color:#7c867c;font-size:10px;line-height:2.1}footer a{text-decoration:none;border-bottom:1px solid #c7cfc3}.brief details{margin-top:14px}#retry-ai{margin-top:15px}@media(min-width:1000px){.board{max-width:570px}.xiangqi .piece{font-size:31px}}@media(max-width:760px){.shell{padding:0 15px}.masthead{padding:19px 0}.intro{padding:26px 0 20px}.intro h1{font-size:35px}.tag{display:none}.layout{grid-template-columns:1fr;gap:16px}.modes{max-width:none;margin-bottom:16px}.modes button{font-size:12px;padding:11px 5px}.play-card{padding:16px 11px}.board{padding:6px;border-width:5px}.piece{font-size:clamp(16px,5.5vw,30px);border-width:1.5px}.side{grid-template-columns:1fr}.panel{padding:18px}.state{margin-bottom:16px;font-size:16px}.brand{font-size:14px}.other{font-size:11px}.actions{gap:5px}.actions button{padding:8px 10px}.intro .eyebrow{font-size:9px;letter-spacing:1px}.gomoku .cell{min-height:0}}

.modes button[aria-pressed="true"]:hover{background:var(--green);color:#fff}

.xiangqi .cell::before{display:none}.board-lines{position:absolute;inset:9px;width:calc(100% - 18px);height:calc(100% - 18px);pointer-events:none;overflow:visible}.board-lines line{stroke:#856947;stroke-width:.018}.board-lines text{font-family:KaiTi,STKaiti,serif;font-size:.36px;text-anchor:middle;fill:#725736}@media(max-width:760px){.board-lines{inset:6px;width:calc(100% - 12px);height:calc(100% - 12px)}}