:root { color-scheme: light; font-family: system-ui, sans-serif; color: #18303b; background: #f3f6f8; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.6; }
header, main, footer { padding: 1.25rem; max-width: 58rem; margin: auto; }
header { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .75rem; border-bottom: 1px solid #ccd8de; }
.brand { font-weight: 700; text-decoration: none; }
a { color: #075c7c; text-underline-offset: .2em; }
a:focus-visible { outline: 3px solid #095c84; outline-offset: 4px; }
main { min-height: 65vh; }
h1 { line-height: 1.2; font-size: clamp(1.8rem, 6vw, 2.6rem); }
h2 { font-size: 1.2rem; }
.label { color: #455d68; }
section, dl { background: white; padding: 1.25rem; border: 1px solid #d4dfe4; border-radius: .5rem; margin: 1.25rem 0; }
dt { font-weight: 700; }
dd { margin: 0 0 1rem; }
.button { display: inline-block; padding: .65rem 1rem; border: 1px solid currentColor; border-radius: .3rem; }
footer { color: #455d68; font-size: .9rem; }