:root{--bg: #0a0e1a;--bg2: #0e1426;--panel: #161f38;--panel2: #1d2a48;--ink: #e7ecf6;--ink-dim: #8da0c2;--accent: #b07cff;--accent-soft: #d3b8ff;--gold: #ffcf5a;--teal: #38d6c4;--line: rgba(140, 150, 220, .18);--radius: 14px}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(1000px 640px at 50% -8%,#1a1640 0%,var(--bg) 62%);color:var(--ink);font-family:Avenir Next,Segoe UI,system-ui,-apple-system,sans-serif;-webkit-user-select:none;user-select:none}#app{max-width:520px;margin:0 auto;padding:16px 14px 30px;min-height:100vh}.screen{animation:fade .25s ease}@keyframes fade{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.home{text-align:center}.logo{font-size:2.6rem;letter-spacing:.02em;margin:26px 0 4px;font-weight:800;background:linear-gradient(180deg,var(--accent-soft),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}.tagline{color:var(--ink-dim);line-height:1.55;max-width:30em;margin:0 auto 24px}.tagline em{color:var(--accent);font-style:normal;font-weight:600}.menu{display:flex;flex-direction:column;gap:12px;margin:0 auto 20px;max-width:360px}.btn{display:flex;flex-direction:column;align-items:center;gap:2px;background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;font:inherit;cursor:pointer;transition:transform .08s,border-color .15s,background .15s}.btn:hover{border-color:var(--accent);background:var(--panel2)}.btn:active{transform:scale(.98)}.btn.primary{background:linear-gradient(180deg,#2a1c4a,#1c1438);border-color:var(--accent)}.btn-title{font-size:1.15rem;color:var(--gold)}.btn-sub{font-size:.8rem;color:var(--ink-dim)}.how{text-align:left;background:#ffffff05;border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;max-width:430px;margin:0 auto}.how h3{margin:0 0 8px;color:var(--accent);font-weight:600}.how ul{margin:0;padding-left:20px;color:var(--ink-dim);line-height:1.65}.how strong{color:var(--ink)}.levelsel{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:0 auto 18px;max-width:400px}.lvl-chip{background:var(--panel);border:1px solid var(--line);color:var(--ink);border-radius:999px;padding:8px 14px;font:inherit;cursor:pointer}.lvl-chip:hover{border-color:var(--accent)}.hud{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;margin-bottom:10px}.quit{background:none;border:1px solid var(--line);color:var(--ink);border-radius:10px;width:36px;height:36px;font-size:1.1rem;cursor:pointer}.hud-mid{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.mode{font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}.stat-pill{font-size:.82rem;color:var(--ink-dim);background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:2px 9px}.score{color:var(--gold);font-size:1.4rem;font-weight:800;min-width:3ch;text-align:right}.board-wrap{display:flex;justify-content:center;position:relative}canvas.board{border-radius:12px;border:1px solid var(--line);box-shadow:0 8px 30px #00000073;touch-action:none}.overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#080a16d1;border-radius:12px;gap:10px;text-align:center;padding:16px}.overlay h2{margin:0;font-size:1.8rem}.overlay.win h2{color:var(--teal)}.overlay.lose h2{color:#ff7a8a}.overlay p{color:var(--ink-dim);margin:0}.controls{display:flex;gap:12px;justify-content:center;margin:16px auto 0}.rotbtn{background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:14px;width:84px;height:64px;font-size:1.6rem;cursor:pointer;display:flex;align-items:center;justify-content:center}.rotbtn:active{background:var(--panel2);border-color:var(--accent)}.rotbtn:disabled{opacity:.4;cursor:default}.act-row{display:flex;gap:10px;justify-content:center;margin:12px auto 0}.smallbtn{background:var(--panel);border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:8px 14px;font:inherit;cursor:pointer}.smallbtn:hover{border-color:var(--accent)}.copied-toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%);background:var(--accent);color:#15082b;padding:9px 18px;border-radius:999px;font-size:.9rem;box-shadow:0 6px 20px #0006}@media(max-width:420px){.logo{font-size:2.2rem}.rotbtn{width:74px}}