:root{--bg: #0e1116;--ink: #eef2f7;--dim: #8b97a7;--accent: #ffcf5c;--panel: rgba(20, 25, 33, .92)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--ink);font:15px/1.4 -apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;user-select:none;-webkit-user-select:none}#stage{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none}#hud{position:fixed;top:0;left:0;right:0;display:flex;align-items:center;gap:12px;padding:calc(env(safe-area-inset-top) + 10px) 14px 10px;pointer-events:none}#hud .back{pointer-events:auto;text-decoration:none;color:var(--ink);background:#ffffff14;border:1px solid rgba(255,255,255,.12);border-radius:8px;width:30px;height:30px;display:grid;place-items:center;font-size:22px;line-height:1;margin-right:2px}#hud .back:active{transform:scale(.92)}#hud .brand{font-weight:700;letter-spacing:.2px}#hud .brand span{color:var(--dim);font-weight:500}#hud .stats{margin-left:auto;display:flex;align-items:baseline;gap:10px}#score{font-size:26px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums}.stats .lbl{color:var(--dim);font-size:12px}.stats .lbl b{color:var(--ink)}#hud .controls{display:flex;gap:6px;pointer-events:auto}#hud input{width:84px;background:#ffffff14;border:1px solid rgba(255,255,255,.12);color:var(--ink);border-radius:8px;padding:6px 8px;font-size:13px}#hud button{background:#ffffff14;border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:6px 8px;font-size:15px;color:var(--ink)}#hud button:active{transform:scale(.92)}#hint{position:fixed;left:0;right:0;bottom:calc(env(safe-area-inset-bottom) + 18px);margin:0;text-align:center;color:var(--dim);font-size:13px;transition:opacity .4s;pointer-events:none}#hint.gone{opacity:0}#board{position:fixed;inset:0;display:grid;place-items:center;background:#0000008c;backdrop-filter:blur(4px);z-index:10}#board[hidden]{display:none}#board .card{width:min(90vw,360px);background:var(--panel);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:18px 18px 14px}#board h2{margin:0 0 12px;font-size:18px}#board h2 small{color:var(--dim);font-weight:400}#boardList{margin:0 0 14px;padding-left:22px;max-height:50vh;overflow:auto}#boardList li{padding:4px 0;display:flex;justify-content:space-between;gap:12px}#boardList li b{color:var(--accent);font-variant-numeric:tabular-nums}#boardList .empty{list-style:none;color:var(--dim);margin-left:-22px}#boardClose{width:100%;background:var(--accent);color:#1a1205;border:0;border-radius:10px;padding:10px;font-weight:700;font-size:15px}