body{font-family:Arial,sans-serif;display:flex;justify-content:center;align-items:center;height:100vh;margin:0;background-color:#f0f0f0}.container{text-align:center}.tablero{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}.carta{width:100px;height:100px;background-color:#aee2ff;display:flex;align-items:center;justify-content:center;font-size:24px;cursor:pointer;transition:transform 1s;padding:16px;border-radius:12px}.flipped{transform:rotateY(180deg);background-color:#b799fe}.unflipped{transform:rotateY(180deg);background-color:#aee2ff}.carta img{width:100%;height:100%;cursor:pointer;transition:transform .5s;transform-style:preserve-3d;backface-visibility:hidden}.carta img:hover{transform:scale(1.1)}*/ .carta img.estaVuelta{transform:rotateY(180deg)}button{padding:10px 20px;font-size:16px;background-color:#4caf50;color:#fff;border:none;cursor:pointer;margin-top:20px;border-radius:5px;transition:background-color .3s ease}button:hover{background-color:#45a049}