body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    color: #333;
}
header {
    background-color: #0066cc;
    color: white;
    padding: 1.5rem;
    text-align: center;
}
nav a {
    margin: 0 1rem;
    color: white;
    text-decoration: none;
    font-weight: bold;
}
section {
    padding: 2rem;
    max-width: 800px;
    margin: auto;
}
footer {
    background-color: #eaeaea;
    text-align: center;
    padding: 1rem;
    font-size: 0.9rem;
}
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #0066cc;
    color: white;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    margin-top: 1rem;
}
.btn:hover {
    background-color: #0055aa;
}