body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: white;
}

.container {
    text-align: center;
}

#numbers {
    margin: 30px 0;
}

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

.ball {
    width: 45px;
    height: 45px;
    background-color: white;
    color: black;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

button {
    padding: 12px 25px;
    font-size: 16px;
    border: none;
    border-radius: 8px;
    background-color: #ffcc00;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background-color: #ffdd33;
}