body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #fff;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 600px;
    width: 90%;
}

h1 {
    color: #1a237e;
    margin-bottom: 30px;
    font-size: 2.5rem;
}

.powerball-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.powerball-numbers {
    display: flex;
    gap: 10px;
}

.powerball-number {
    margin-left: 20px;
}

.number-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #fff;
    border: 2px solid #e0e0e0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
    color: #333;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.number-circle.powerball {
    background-color: #d32f2f;
    color: white;
    border-color: #c62828;
}

#generate-btn {
    background-color: #1a237e;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 15px rgba(26, 35, 126, 0.4);
}

#generate-btn:hover {
    background-color: #283593;
    transform: translateY(-2px);
}

#generate-btn:active {
    transform: translateY(1px);
}