body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    text-align: center;
    margin: 0;
    padding: 0;
}

h1 {
    padding: 20px;
    color: #333;
}

#chart {
    margin: 20px auto;
    width: 80%;
    max-width: 600px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    border-radius: 8px;
}