:root{font-family:Microsoft JhengHei,system-ui,sans-serif;color:#edf3ff;background:#0b1225;--accent:#ffbd83;--ink:#211631}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 30% 40%,#26314d,#0b1225 75%);min-height:100vh}button,input{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:4px}header,main{max-width:1400px;margin:auto;padding:22px 32px}header{display:flex;justify-content:space-between;align-items:center}.brand{font-size:22px;font-weight:900;letter-spacing:.04em;text-decoration:none;color:#fff}.brand 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#0004}.symbol{font-size:40px;color:var(--accent);margin-bottom:10px}.dialog h2{font-size:24px;margin:0 0 10px}.dialog p{font-size:13px;line-height:1.7;color:#b6c7df;margin:6px 0 16px}.primary{width:100%;background:var(--accent);color:var(--ink);font-weight:800;padding:14px 16px;border:0;border-radius:12px;font-size:16px}.primary:active{transform:scale(.98)}.outline{border:1px solid #ffffff33;border-radius:12px;background:#ffffff0b;color:#edf3ff;width:100%;padding:12px;margin-top:10px}.text-button{border:0;background:none;color:#b9c7de;padding:13px}aside{padding:23px;border:1px solid #ffffff18;border-radius:24px;background:#121d33}.aside-label{font-size:11px;color:#9fb1ca}aside h2{font-size:18px;line-height:1.5;margin:12px 0}aside ol{padding-left:21px;font-size:13px;color:#b4c5de;line-height:1.9}aside li{padding-bottom:10px}.tip{font-size:12px;color:var(--accent);line-height:1.8;border-top:1px solid #ffffff1a;padding:15px 0;margin:10px 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input{min-width:0;width:100%;background:#101a2d;color:#fff;border:1px solid #485976;border-radius:10px;padding:12px}.name-row .primary{width:auto;white-space:nowrap;font-size:13px}.dialog .privacy{font-size:10px;margin:9px 0}.flash{animation:flash .4s}.shake{animation:shake .35s}@keyframes flash{50%{box-shadow:inset 0 0 100px #fff7}}@keyframes shake{20%,60%{transform:translate(-7px)}40%,80%{transform:translate(7px)}}[hidden]{display:none!important}@media(max-width:850px){header,main{padding:16px}.game-layout{grid-template-columns:1fr}#stage{height:min(68dvh,600px);min-height:390px}aside{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}aside .aside-label,aside h2,aside ol,aside .tip{grid-column:1}aside #action,aside .lane-buttons,aside .board{grid-column:2}aside #action{grid-row:1/3;align-self:center}.board{margin-top:0;grid-row:4/7}.lane-buttons{grid-row:3}.title-row{gap:12px}h1{font-size:27px}.tools 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