body {
    font-family: Arial, sans-serif;
    background-color: #001f3f; /* Dark blue background */
    color: #ffffff; /* White text color */
    margin: 0;
    padding: 0;
}
header {
    background-color: #007bff;
    color: white;
    padding: 1rem;
    text-align: center;
}
main {
    padding: 2rem;
}
a {
    color: #007bff;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}