:root {
    color-scheme: light dark;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #202631;
    background: #f4f6fa;
    --muted: #505d70;
    --link: #1751ac;
    --line: #d6dfed;
    --surface: #ffffffd9;
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 1.0625rem; line-height: 1.7; overflow-wrap: break-word; }
a { color: var(--link); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: .12em; }
a:focus-visible { outline: 3px solid var(--link); outline-offset: 5px; border-radius: 3px; }
.masthead, main, footer { width: min(calc(100% - 3rem), 52rem); margin-inline: auto; }
.masthead { display: flex; gap: 1rem; justify-content: space-between; align-items: center; padding-block: 2rem; color: var(--muted); font-size: .875rem; }
.brand { color: var(--link); font-weight: 750; font-size: 1.5rem; letter-spacing: -.04em; }
main { border: 1px solid var(--line); border-radius: 1.5rem; background: var(--surface); padding: clamp(1.25rem, 5vw, 3.5rem); }
.eyebrow { color: var(--link); font-weight: 650; font-size: .875rem; margin: 0; }
h1 { margin: .4rem 0 .5rem; font-size: clamp(2.25rem, 6vw, 3.5rem); line-height: 1.1; letter-spacing: -.045em; }
.updated { color: var(--muted); font-size: .875rem; }
.lead { margin-top: 1.5rem; font-size: 1.2rem; line-height: 1.6; }
nav { display: flex; flex-wrap: wrap; gap: .25rem 1.2rem; margin-block: 2rem; padding-block: 1rem; border-block: 1px solid var(--line); }
nav a { display: inline-flex; align-items: center; min-height: 44px; font-size: .9375rem; }
section { margin-top: 2.5rem; scroll-margin-top: 1.5rem; }
h2 { font-size: 1.45rem; line-height: 1.3; letter-spacing: -.02em; margin: 0 0 1rem; }
h3 { font-size: 1.1rem; line-height: 1.4; margin-top: 1.75rem; }
p { margin-block: .9rem; }
.notice { border-inline-start: 3px solid var(--link); padding-inline-start: 1rem; color: var(--muted); }
footer { display: flex; flex-wrap: wrap; gap: .5rem 1rem; justify-content: space-between; padding-block: 2rem 3rem; font-size: .875rem; color: var(--muted); }
footer a { display: inline-flex; align-items: center; min-height: 44px; }
.skip-link { position: absolute; top: .5rem; left: 1rem; padding: .75rem; background: var(--surface); transform: translateY(-200%); z-index: 1; }
.skip-link:focus { transform: translateY(0); }
@media (prefers-color-scheme: dark) {
    :root { color: #e8edf6; background: #10151e; --surface: #19212ee8; --muted: #adbcd0; --link: #a1c4ff; --line: #364257; }
}
@media (max-width: 480px) {
    .masthead, main, footer { width: calc(100% - 1.5rem); }
    .masthead { align-items: flex-start; flex-direction: column; gap: .25rem; padding-block: 1.25rem; }
    main { border-radius: 1rem; }
}
@media print {
    :root { color: black; background: white; --surface: white; --muted: #333; --link: black; --line: #aaa; }
    main { width: 100%; padding: 0; border: 0; }
    .masthead, nav, .skip-link, footer { display: none; }
    h2, h3 { break-after: avoid; }
}