@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600&display=swap');
:root{color-scheme:light;--paper:#f4f1e9;--ink:#272e28;--green:#284d3e;--muted:#85877b;--line:#dcded2}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;-webkit-tap-highlight-color:transparent}button,a,input{touch-action:manipulation}button{font:inherit;cursor:pointer;color:inherit}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:3px solid #b88347;outline-offset:4px}button{border:0}header,main{max-width:1200px;margin:auto}.header{height:100px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;text-decoration:none;color:var(--ink);font-family:"Noto Serif SC",serif;font-size:24px;font-weight:600;align-items:center}.brand-mark{font-size:49px;line-height:1;color:var(--green)}.wordmark{font-family:Georgia,serif;font-size:10px;letter-spacing:2.5px;display:block;margin-top:2px}.text-button{background:none;font-size:13px;min-height:44px}.text-button span{margin-left:18px}.intro{display:flex;justify-content:space-between;align-items:center;padding:40px 0 32px}.eyebrow{font-size:10px;letter-spacing:2.1px;color:var(--muted);font-weight:600;margin:0 0 16px}h1{font-family:"Noto Serif SC",serif;font-size:36px;font-weight:500;letter-spacing:2px;margin:0}h1 span{color:var(--green)}.intro-note{font-size:12px;line-height:2;color:var(--muted)}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:38px;align-items:start}.board-panel{background:#ebe9de;border:1px solid #dfdfd1;border-radius:8px;padding:20px 24px 14px}.board-top,.board-bottom{display:flex;align-items:center;justify-content:space-between;font-size:12px}.board-top>span:first-child{display:flex;align-items:center;gap:9px}.live-dot{width:6px;height:6px;background:var(--green);border-radius:50%;display:inline-block}.move-count{color:var(--muted);font-size:11px}.move-count b{color:var(--ink);font-family:Georgia,serif;font-weight:400;font-size:19px;margin:0 3px}.board-wrap{margin:18px auto 12px;max-width:640px;aspect-ratio:1;background:#dfc69a;border-radius:5px;box-shadow:0 3px 5px #5f462020,0 13px 30px #5f462013;overflow:hidden}canvas{display:block;width:100%;height:100%;touch-action:none;user-select:none;-webkit-user-select:none}.board-bottom{font-size:10px;color:#858475;min-height:24px}.board-bottom span:last-child{letter-spacing:2px}.setup{padding:6px 0 0}h2{font-family:"Noto Serif SC",serif;font-weight:500;font-size:27px;margin:0 0 28px}.field-label{display:flex;justify-content:space-between;font-size:12px;margin:20px 0 12px}.field-label>span{color:var(--muted);font-size:10px;letter-spacing:1px}.levels{display:grid;grid-template-columns:1fr 1fr;gap:9px}.levels button{position:relative;text-align:left;background:transparent;border:1px solid #d4d7ca;border-radius:5px;padding:12px 14px;font-size:14px;min-height:70px;transition:background .2s}.levels button>span{font-family:Georgia,serif;color:#929a8d;font-size:11px;margin-right:10px}.levels button i{font-size:10px;font-style:normal;display:block;color:#858d81;margin:8px 0 0 25px}.levels button.selected{background:var(--green);color:#fff;border-color:var(--green)}.levels button.selected span,.levels button.selected i{color:#c3d0c4}.level-desc{font-size:11px;color:var(--muted);line-height:1.8;min-height:40px;margin:13px 0 16px}.sides{display:flex;gap:9px}.sides button{display:flex;align-items:center;justify-content:center;gap:9px;flex:1;font-size:11px;border:1px solid var(--line);background:none;border-radius:5px;min-height:46px}.sides .selected{border-color:var(--green);background:#e5e9de}.stone{display:inline-block;width:18px;height:18px;border-radius:50%;box-shadow:0 2px 3px #0002;flex-shrink:0}.black{background:radial-gradient(circle at 32% 25%,#53584f,#1b201c 70%)}.white{background:radial-gradient(circle at 32% 25%,#fff,#e5e3da 80%);border:1px solid #cfcec4}.primary{display:flex;justify-content:space-between;align-items:center;background:var(--green);color:#fff;width:100%;min-height:48px;border-radius:5px;padding:0 19px;font-size:13px;margin-top:22px}.primary:hover{background:#365f4e}.actions{display:flex;margin:10px 0 18px}.actions button{flex:1;min-height:44px;background:none;font-size:12px}.actions button+button{border-left:1px solid var(--line)}.touch-card{padding:17px;background:#e9ece2;border-radius:5px}.touch-title{display:flex;justify-content:space-between;align-items:center;font-size:12px}.touch-card p{font-size:10px;line-height:1.9;color:#7d8678;margin-bottom:0}.switch{position:relative;display:flex;align-items:center;width:44px;height:28px}.switch input{position:absolute;width:100%;height:100%;opacity:0;margin:0;cursor:pointer}.switch span{width:34px;height:19px;border-radius:20px;background:#c5cbbd;pointer-events:none}.switch span:after{content:'';display:block;border-radius:50%;width:13px;height:13px;margin:3px;background:white;transition:transform .2s}.switch input:checked+span{background:var(--green)}.switch input:checked+span:after{transform:translateX(15px)}.switch input:focus-visible+span{outline:2px solid var(--green);outline-offset:3px}.confirm{margin-top:12px;min-height:44px;width:100%;background:var(--green);color:white;border-radius:4px}.players{display:flex;justify-content:space-between;align-items:center;margin-top:22px;font-size:11px}.players>span{display:flex;align-items:center;gap:8px}.players .versus{font-family:Georgia,serif;font-size:10px;color:#999f91}footer{border-top:1px solid var(--line);margin:32px 0 0;padding:23px 0 30px;display:flex;justify-content:space-between;font-size:10px;color:#929689;letter-spacing:1px}footer i{margin:0 9px;font-style:normal}dialog{border:1px solid var(--line);border-radius:10px;background:var(--paper);padding:36px;width:min(90vw,400px);color:var(--ink);box-shadow:0 20px 80px #0002}dialog::backdrop{background:#17251d66;backdrop-filter:blur(4px)}dialog p{font-size:13px;line-height:2;white-space:pre-line}#close-dialog{position:absolute;right:10px;top:8px;width:44px;height:44px;background:none;font-size:24px}dialog h2{margin-bottom:12px}@media(min-width:1100px) and (max-height:900px){.header{height:78px}.intro{padding:24px 0}.board-wrap{max-width:530px}.board-panel{padding:16px 22px}.game-layout{grid-template-columns:minmax(0,1fr) 300px}footer{margin-top:24px}}@media(max-width:1270px){header,main{margin-left:5%;margin-right:5%}}@media(max-width:950px){.game-layout{gap:24px;grid-template-columns:minmax(0,1fr) 260px}.board-panel{padding:15px 12px}.intro-note{display:none}h1{font-size:30px}}@media(max-width:820px) and (orientation:portrait){.game-layout{grid-template-columns:1fr}.board-wrap{max-width:680px}aside{display:grid;grid-template-columns:1.4fr 1fr;gap:0 28px}.setup{grid-row:span 2}.touch-card{align-self:start;margin-top:6px}.players{align-self:start}h2{margin-bottom:18px}.intro{padding:28px 0}.header{height:82px}}@media(max-width:600px){header,main{margin-left:16px;margin-right:16px}.header{height:72px}.intro{padding:25px 0 22px}h1{font-size:25px;letter-spacing:1px}.eyebrow{font-size:8px}.board-panel{padding:14px 9px 10px}.board-wrap{margin-top:14px}.board-bottom{font-size:9px}.game-layout{display:block}aside{display:block;margin-top:28px}.levels{grid-template-columns:repeat(4,1fr);gap:6px}.levels button{padding:11px 8px;font-size:12px}.levels button>span{display:block;margin-bottom:7px}.levels button i{margin:6px 0 0;font-size:9px}.level-desc{min-height:0}.touch-card{margin-top:10px}.players{margin-top:18px}footer span:last-child{display:none}footer{margin-top:24px}.setup h2{font-size:23px}body{padding-bottom:env(safe-area-inset-bottom)}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}
@media (min-width:821px) and (max-height:900px){.header{height:66px}.intro{padding:18px 0}.intro .eyebrow{margin-bottom:10px}h1{font-size:30px}.board-wrap{max-width:min(530px,calc(100dvh - 270px))}.setup h2{margin-bottom:18px}.setup .eyebrow{margin-bottom:10px}.field-label{margin-top:14px}.levels button{min-height:64px;padding:10px 14px}.level-desc{min-height:0;margin:10px 0}.primary{margin-top:16px}.actions{margin:5px 0 10px}.touch-card{padding:12px}.players{margin-top:14px}footer{margin-top:18px;padding:16px 0}}