body {
    font-family: Arial, sans-serif;
    max-width: 900px;
    margin: auto;
    padding: 20px;
    background-color: #f5f5f5;
}

header {
    background-color: #2d3748;
    color: white;
    padding: 20px;
}

nav a {
    color: white;
    margin-right: 15px;
    text-decoration: none;
}

section {
    background: white;
    padding: 20px;
    margin-top: 20px;
    border-radius: 5px;
}

footer {
    text-align: center;
    margin-top: 20px;
}