body {
    font-family: Arial, sans-serif;
    margin: 40px;
    background-color: #f0f8ff;
}
header {
    background: #002244;
    color: white;
    padding: 20px;
    text-align: center;
}
button {
    padding: 10px 20px;
    background-color: #0073e6;
    color: white;
    border: none;
    border-radius: 5px;
}