:root{--bg:#0a0a14;--surface:#ffffff08;--border:#ffffff0f;--text:#e4e4e7;--muted:#71717a}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);justify-content:center;align-items:center;min-height:100vh;font-family:system-ui,-apple-system,sans-serif;display:flex}#app{text-align:center}header{flex-wrap:wrap;justify-content:center;align-items:center;gap:20px;margin-bottom:16px;display:flex}header h1{font-size:28px;font-weight:700}.scores{align-items:center;gap:8px;display:flex}.score-box{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:8px;min-width:60px;padding:6px 14px}.score-box .label{color:var(--muted);margin-bottom:2px;font-size:10px;display:block}.score-box span:last-child{font-size:18px;font-weight:700}.best-box span:last-child{color:#fbbf24;font-size:14px}select{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:8px;padding:6px 12px;font-size:12px}.board{border:2px solid #ffffff26;border-radius:8px;grid-template-columns:repeat(9,1fr);gap:0;width:fit-content;margin:0 auto;display:grid;overflow:hidden}.cell{cursor:pointer;background:var(--surface);-webkit-user-select:none;user-select:none;border:1px solid #ffffff0d;justify-content:center;align-items:center;width:50px;height:50px;font-size:20px;font-weight:600;transition:background-color .1s;display:flex}.cell:hover{background:#a855f71a}.cell.selected{background:#a855f733}.cell.given{color:var(--text);font-weight:700}.cell:not(.given){color:#60a5fa}.cell.error{color:#f87171}.cell.bb{border-bottom:2px solid #ffffff1a}.cell.br{border-right:2px solid #ffffff1a}.actions{margin-top:16px}.numpad{justify-content:center;gap:4px;margin-bottom:12px;display:flex}.numpad button{border:1px solid var(--border);background:var(--surface);width:36px;height:36px;color:var(--text);cursor:pointer;border-radius:8px;font-size:16px;font-weight:600;transition:background-color .15s,border-color .15s}.numpad button:hover{background:#a855f726;border-color:#a855f74d}#hint,#restart{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;border-radius:10px;margin:0 4px;padding:8px 20px;font-size:13px;font-weight:500;transition:background-color .2s,border-color .2s}#hint:hover,#restart:hover{background:#a855f71a;border-color:#a855f74d}.message{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:100;background:#0a0a14b3;justify-content:center;align-items:center;font-size:28px;font-weight:700;animation:.3s fadeIn;display:flex;position:fixed;inset:0}.message.hidden{display:none}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}