body {
    background-color: #1a1a1a;
    color: white;
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.casino-container {
    text-align: center;
    background: #2c3e50;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.balance-display {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #f1c40f;
}

.slots {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
}

.slot {
    width: 80px;
    height: 80px;
    background: #ecf0f1;
    color: #2c3e50;
    font-size: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
    border: 4px solid #f1c40f;
}

button {
    padding: 10px 20px;
    font-size: 1.2rem;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:disabled {
    background: #7f8c8d;
}

#message {
    margin-top: 20px;
    height: 20px;
    font-weight: bold;
}