.memory-game-container{text-align:center;margin-top:30px;font-family:Arial,sans-serif}.memory-grid{display:grid;grid-template-columns:repeat(4,80px);gap:10px;justify-content:center;margin:20px auto}.memory-card{width:80px;height:80px;font-size:2rem;display:flex;align-items:center;justify-content:center;background:#444;border:2px solid #222;cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:8px;transition:transform .3s,background .3s}.memory-card.flipped{background:#fff;transform:rotateY(0)}.restart-button{margin-top:20px;padding:10px 20px;font-size:16px;border-radius:8px;cursor:pointer;background:#4caf50;color:#fff;border:none;transition:background .3s}.restart-button:hover{background:#45a049}