*{box-sizing:border-box}body{margin:0;min-height:100vh;background:#f3f5f9;color:#18243b;font-family:system-ui,sans-serif;display:grid;place-items:center;padding:20px}main{width:100%;max-width:480px}header{text-align:center;margin-bottom:24px}h1{font-size:32px;letter-spacing:-1px;margin:0 0 8px}p{color:#647087;line-height:1.5;margin:0}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:16px}.stat{background:white;border:1px solid #e1e6ef;border-radius:12px;text-align:center;padding:12px 4px}.stat span{display:block;font-size:12px;color:#647087}.stat strong{display:block;font-size:23px;margin-top:4px;font-variant-numeric:tabular-nums}.board{position:relative;background:white;border:1px solid #e1e6ef;border-radius:18px;padding:12px;overflow:hidden}#grid{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:3px}button{font:inherit;cursor:pointer;touch-action:manipulation}#grid button{padding:0;aspect-ratio:1;border:0;border-radius:7px;background:transparent;color:#33445e;font:bold clamp(20px,5vw,29px) ui-monospace,monospace}#grid button:hover{background:#edf1f8}#grid button:disabled{cursor:default}#grid button.wrong{background:#fee2e2;color:#b91c1c}button:focus-visible{outline:3px solid #2563eb;outline-offset:1px}#overlay{position:absolute;inset:0;background:#ffffffed;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:24px;gap:14px}#overlay[hidden]{display:none}h2{margin:0;font-size:26px}.primary{background:#2563eb;color:white;border:0;border-radius:10px;padding:13px 28px;font-weight:700}.primary:hover{background:#1d4ed8}.controls{display:flex;justify-content:center;gap:10px;margin:16px 0}.controls button{background:white;color:#33445e;border:1px solid #d7deea;border-radius:9px;padding:9px 20px}.controls button:disabled{opacity:.45;cursor:default}footer{text-align:center;font-size:12px;color:#647087}#save-status{margin-top:8px;min-height:18px}#message{max-width:300px}


.identity,.leaderboard{background:#fff;border:1px solid #e1e6ef;border-radius:14px;padding:16px}.identity{margin-bottom:16px}#username-label{display:block;font-size:14px;font-weight:700;margin-bottom:8px}.username-controls{display:flex;gap:8px}#username{font:inherit;min-width:0;flex:1;border:1px solid #d7deea;border-radius:8px;padding:10px 12px;color:#18243b;background:#fff}#username:focus-visible{outline:3px solid #2563eb;outline-offset:1px}#username:disabled{background:#f3f5f9;color:#647087}#username[aria-invalid=true]{border-color:#dc2626}#username-save,#leaderboard-refresh{font:inherit;border:1px solid #d7deea;border-radius:8px;padding:9px 13px;background:#fff;color:#33445e;white-space:nowrap}#username-save{background:#2563eb;border-color:#2563eb;color:#fff;font-weight:600}#username-save:disabled{opacity:.45;cursor:default}#username-hint{font-size:12px;margin-top:8px}#username-message{font-size:12px;margin-top:5px;min-height:18px}#username-message.error{color:#b91c1c}.leaderboard{margin-top:24px}.leaderboard-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.leaderboard h2{font-size:21px}.leaderboard-caption,#leaderboard-status{font-size:12px;margin-top:8px}#leaderboard-status{min-height:18px}#leaderboard-refresh:disabled{opacity:.45;cursor:default}#leaderboard-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:10px}#leaderboard-table th,#leaderboard-table td{padding:10px 8px;border-bottom:1px solid #edf1f6;text-align:left}#leaderboard-table th{font-size:12px;color:#647087;font-weight:600}#leaderboard-table th:first-child,#leaderboard-table td:first-child{width:52px}#leaderboard-table th:last-child,#leaderboard-table td:last-child{text-align:right;font-variant-numeric:tabular-nums}#leaderboard-table tr:last-child td{border-bottom:0}#leaderboard-table tr.you{background:#eff6ff;color:#1d4ed8;font-weight:700}#leaderboard-table td:nth-child(2){overflow-wrap:anywhere}@media(max-width:360px){body{padding:12px}.identity,.leaderboard{padding:12px}.username-controls{gap:6px}#username{padding:9px 8px}#username-save{padding:9px 10px}}