body {
    font-family: 'Helvetica Neue', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
}

.container {
    text-align: center;
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

h1 {
    margin-bottom: 30px;
    color: #333;
}

.numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.number-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: white;
    background-color: #4CAF50; /* Default color */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s;
}

.number-circle:hover {
    transform: scale(1.1);
}

#generate-btn {
    padding: 15px 30px;
    font-size: 18px;
    color: white;
    background-color: #007BFF;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#generate-btn:hover {
    background-color: #0056b3;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}