body {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    font-family: system-ui, sans-serif;
    line-height: 1.6;
}

header {
    margin-bottom: 3rem;
}

nav {
    display: flex;
    gap: 1rem;
}

article {
    margin-bottom: 2rem;
}

a {
    text-decoration: none;
}