body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
    color: #333;
}

header {
    background-color: #f4f4f4;
    padding: 20px;
    text-align: center;
    margin-bottom: 20px;
}

button {
    background-color: #0066ff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #0052cc;
}