body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:#0b0d10;color:#e8e8e8;margin:0;padding:20px}
.container{max-width:900px;margin:0 auto}
h1{font-size:24px;margin-bottom:10px}
.controls{margin-bottom:12px}
.controls button{margin-inline-end:8px;padding:8px 12px;border:0;border-radius:6px;background:#2d6cdf;color:#fff;cursor:pointer}
.controls button:hover{opacity:.9}
.status{margin:12px 0 16px;background:#14171c;padding:10px;border-radius:8px;line-height:1.9}
.hint{opacity:.7;font-size:12px;margin-top:10px}
#board{border:2px solid #222;border-radius:8px}