body {
    background-color: #2c3e50; /* Dark poker table color */
    color: white;
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
/* Animation for a correct guess */
.correct-pop {
    animation: pop 0.3s ease-out;
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); border-color: #2ecc71; }
    100% { transform: scale(1); }
}

/* Animation for a wrong guess */
.shake {
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); border-color: #e74c3c; }
    75% { transform: translateX(10px); }
}

.game-container {
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.card {
    width: 150px;
    height: 220px;
    background: white;
    color: black;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3rem;
    margin: 20px auto;
    border: 5px solid #bdc3c7;
    transition: transform 0.2s;
}

button {
    padding: 10px 20px;
    margin: 5px;
    cursor: pointer;
    border-radius: 5px;
    border: none;
    background: #e67e22;
    color: white;
    font-weight: bold;
}

button:hover { background: #d35400; }
#reset-btn { background: #7f8c8d; }