body {
    font-family: Arial, sans-serif;
    max-width: 900px;
    margin: auto;
    padding: 20px;
    line-height: 1.6;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

nav {
    text-align: center;
    margin-bottom: 30px;
}

nav a {
    margin: 0 10px;
    text-decoration: none;
}

section {
    margin-bottom: 40px;
}