:root{--primary-color: #2c3e50;--secondary-color: #34495e;--accent-color: #e74c3c;--text-color: #ecf0f1;--card-color: #ffffff}body{font-family:Arial,sans-serif;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;margin:0;background-color:var(--primary-color);color:var(--text-color);padding:20px;box-sizing:border-box}.game-area{display:flex;flex-direction:column;align-items:center;width:100%;max-width:500px}.hand{display:flex;flex-wrap:wrap;justify-content:center;margin:10px 0}.card{width:50px;height:75px;background-color:var(--card-color);color:var(--primary-color);margin:5px;display:flex;flex-direction:column;justify-content:center;align-items:center;border-radius:5px;font-size:18px;box-shadow:0 2px 5px #0003;transition:transform .3s ease}.card:hover{transform:translateY(-5px)}.card-back{background-color:var(--accent-color);color:var(--text-color)}.red{color:var(--accent-color)}.buttons{display:flex;flex-wrap:wrap;justify-content:center;margin-top:20px}button{margin:5px;padding:12px 24px;font-size:16px;cursor:pointer;background-color:var(--secondary-color);color:var(--text-color);border:none;border-radius:5px;transition:background-color .3s ease}button:hover{background-color:var(--accent-color)}button:disabled{background-color:#95a5a6;cursor:not-allowed}#message{font-size:20px;margin-top:20px;text-align:center;min-height:30px}#rules{max-width:100%;margin-top:30px;text-align:left;background-color:var(--secondary-color);padding:20px;border-radius:10px}h2,h3{margin-top:0}@media(max-width:480px){.card{width:40px;height:60px;font-size:14px}button{padding:10px 20px;font-size:14px}}