*{box-sizing:border-box}body{margin:0;background:#101d29;color:#f1f4ec;font:16px/1.5 system-ui,sans-serif}main{max-width:520px;margin:auto;padding:16px}h1{font-size:clamp(24px,7vw,34px);line-height:1.1;margin:14px 0}h2{font-size:20px}p{margin:12px 0}small,.eyebrow{color:#c4d8d3}.panel{background:#1b303e;border:1px solid #537078;border-radius:15px;padding:12px;margin:14px 0}#board{display:grid;grid-template-columns:repeat(var(--cols),minmax(0,1fr));gap:3px;margin:16px 0}button,a{touch-action:manipulation}button{min-width:44px;min-height:44px;border:1px solid #84b9b0;border-radius:8px;background:#294959;color:#fff;font:inherit;padding:6px;overflow-wrap:anywhere}button:hover{background:#3c6571}button:focus-visible,a:focus-visible{outline:3px solid #ffce72;outline-offset:2px}button:disabled{opacity:1;background:#172c38;color:#b4c6c4;border-color:#395463}#board button{aspect-ratio:1;font-size:clamp(12px,3.6vw,18px);padding:2px}#controls{display:flex;flex-wrap:wrap;gap:7px}#controls button{flex:1 1 90px}a{display:inline-flex;align-items:center;min-height:44px;color:#aee7de;padding:6px 0;overflow-wrap:anywhere}#info{white-space:pre-wrap;font-size:14px}#message{border-left:3px solid #efc478;padding-left:10px}details summary{min-height:44px;cursor:pointer}footer{margin-top:24px}@media(max-width:350px){main{padding:10px}.panel{padding:8px}}

body{background:linear-gradient(#23394b,#354e60);color:#e8e8e3}.panel{background:#354e60;border:2px solid #8baebf}h1{font-family:Georgia,serif}#board{gap:4px;padding:6px;background:#8baebf;border-radius:12px}#board button{border-radius:6px;min-height:48px;font-size:25px;font-weight:bold}#controls button{background:#586a85;border-color:#8baebf}#board button[data-kind="■"]{background:#243746;color:#243746}#board button[data-kind="·"]{background:#455d70;color:#8c9c95}#board button[data-kind="◎"]{background:#d8bd7f;color:#735f38}#board button[data-kind="□"]{background:#b59a75;color:#604829;box-shadow:inset 0 0 0 4px #8c7351}#board button[data-kind="@"]{background:#b6d6d0;color:#285663}#board button[data-kind="HOT"]{background:#c87b5c;color:#ffe6a1}#board button[data-kind="ICE"]{background:#9fdae1;color:#3b7394}#board button[data-sealed="true"]{background:repeating-linear-gradient(45deg,#665e50 0 7px,#d1b568 7px 14px);color:transparent}