:root { color-scheme: light; background: #f6f8fb; color: #16243a; font: 18px/1.65 system-ui, sans-serif; }
body { max-width: 42rem; margin: 0 auto; padding: 2rem 1.25rem; }
header, footer { padding-block: 1rem; }
nav { display: flex; flex-wrap: wrap; gap: .5rem 1.2rem; }
main { padding: clamp(1.25rem, 5vw, 2.5rem); background: #fff; border: 1px solid #d7e0eb; border-radius: 1rem; }
h1, h2 { line-height: 1.25; }
h1 { margin-top: 0; }
h2 { font-size: 1.2rem; margin-top: 1.75rem; }
a { color: #174b85; text-underline-offset: .16em; }
a:focus-visible { outline: 2px solid #174b85; outline-offset: 4px; }
footer { font-size: .9rem; }