:root{--bg:#0b1020;--card:rgba(255,255,255,.06);--text:#e8eefc;--muted:rgba(232,238,252,.7);--primary:#5b8cff;--danger:#ff5b7a;--ok:#34d399;--border:rgba(255,255,255,.12);--radius:16px;--shadow:0 10px 30px rgba(0,0,0,.35);--maxw:420px;color-scheme:dark;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}html,body{height:100%;margin:0;background:var(--bg);color:var(--text)}*{box-sizing:border-box}.container{max-width:var(--maxw);margin:0 auto;padding:16px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.stack{display:flex;flex-direction:column;gap:12px}.btn{border:1px solid var(--border);border-radius:14px;padding:12px 14px;background:#ffffff0f;color:var(--text);cursor:pointer}.btn.primary{background:var(--primary);border-color:transparent;color:#081022;font-weight:700}.btn.danger{background:var(--danger);border-color:transparent;color:#081022;font-weight:700}.btn:disabled{opacity:.6;cursor:not-allowed}.h1{font-size:22px;font-weight:800}.muted{color:var(--muted)}.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;border:1px solid var(--border);background:#ffffff0a;font-size:12px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.cell{aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;font-size:34px;font-weight:900;border-radius:16px;border:1px solid var(--border);background:#ffffff0d;cursor:pointer;-webkit-user-select:none;user-select:none}.cell.win{outline:2px solid var(--ok)}.hr{height:1px;background:#ffffff1f;margin:12px 0}.input{width:100%;padding:12px 14px;border-radius:14px;border:1px solid var(--border);background:#0003;color:var(--text)}.tabs{display:flex;gap:10px}.tab{flex:1;text-align:center;padding:10px;border-radius:14px;border:1px solid var(--border);background:#ffffff0a;cursor:pointer}.tab.active{background:#5b8cff40;border-color:#5b8cff99}