*,:before,:after{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);margin:0;font-family:system-ui,sans-serif;overflow:hidden}body{display:flex}#board{flex:1;min-width:0;display:flex}#game{touch-action:none;flex:1;min-width:0;height:100vh;display:block}.dev-panel{background:var(--surface);border-left:1px solid var(--border);flex-shrink:0;width:248px;padding:16px;font-size:13px;overflow-y:auto}.dev-panel[hidden]{display:none}.dev-panel h2{margin:0 0 4px;font-size:15px}.dev-panel .hint{color:var(--muted);margin:0 0 16px}.dev-panel fieldset{border:1px solid var(--border);border-radius:6px;gap:8px;margin:0 0 12px;padding:10px 10px 12px;display:grid}.dev-panel legend{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;padding:0 4px;font-size:11px;font-weight:600}.dev-panel label{justify-content:space-between;align-items:center;gap:8px;display:flex}.dev-panel input,.dev-panel select{background:var(--bg);width:80px;color:inherit;border:1px solid var(--border);font:inherit;border-radius:4px;padding:4px 6px}.dev-panel .buttons{flex-wrap:wrap;gap:6px;display:flex}.dev-panel button{background:var(--surface-2);color:inherit;border:1px solid var(--border);font:inherit;cursor:pointer;border-radius:4px;flex:1;padding:6px 8px}.dev-panel button:hover{background:var(--border)}.dev-panel .stats{color:var(--muted);margin:16px 0 0;font-size:12px}.toolbar{gap:8px;display:flex;position:fixed;top:12px;left:12px}.corner-button{background:var(--surface-2);width:40px;height:40px;color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:8px;place-items:center;padding:0;display:grid}.corner-button:hover{background:var(--border)}.corner-button:focus-visible{outline:2px solid var(--text);outline-offset:2px}.dev-panel input.file{width:140px;padding:2px;font-size:11px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}#game:focus{outline:none}