body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
}
header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}
nav a {
    margin: 0 15px;
    color: #fff;
    text-decoration: none;
}
main {
    padding: 2rem;
}
section {
    margin-bottom: 2rem;
}
footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
}