:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#0a0a0a;color:#fafafa}.shell{min-height:100vh;display:grid;place-items:center;padding:2rem}.game{display:flex;flex-direction:column;align-items:center;gap:1.25rem}h1{margin:0;font-size:1.5rem;font-weight:600;letter-spacing:-.02em}.grid{display:grid;grid-template-columns:repeat(6,60px);gap:6px}.card-cell{width:60px;height:60px;background:#333;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:1.75rem;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background .15s,transform .15s}.card-cell:hover:not(.flipped):not(.matched){background:#444;transform:scale(1.05)}.card-cell.flipped{background:#555}.card-cell.matched{background:#2a5a2a}.win-banner{font-size:1.1rem;font-weight:600;color:#4ade80;display:flex;align-items:center;gap:.75rem}.restart-btn{background:#333;color:#fafafa;border:1px solid rgba(255,255,255,.15);border-radius:6px;padding:.4rem 1rem;font-size:.85rem;cursor:pointer}.restart-btn:hover{background:#444}