:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #14181f;
  background: #f6f7f9;
  scroll-behavior: smooth;
  --red: #d40808;
  --red-soft: #fdeeee;
  --border: #d9dde3;
  --muted: #5b6472;
}
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.65; }
button { font: inherit; }
a { color: #a30000; }
.skip-link { position: fixed; z-index: 10; top: 8px; left: 8px; min-height: 44px; padding: 11px 16px; border-radius: 8px; background: #111827; color: #fff; text-decoration: none; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.wrap { display: grid; grid-template-columns: 270px minmax(0, 1fr); column-gap: 32px; max-width: 1120px; margin: 0 auto; padding: 32px 20px 80px; align-items: start; }
.page-header { grid-column: 2; grid-row: 1; padding: 28px 36px 8px; border: 1px solid var(--border); border-bottom: 0; border-radius: 12px 12px 0 0; background: #fff; }
.page-header h1 { margin: 8px 0; font-size: 2rem; line-height: 1.15; }
.crumb { margin: 0; font-size: .9rem; }
.lede { margin: 0 0 8px; color: var(--muted); font-size: 1.05rem; }
.updated { margin: 0 0 12px; color: var(--muted); font-size: .85rem; }
.env-badge { display: inline-block; padding: 2px 8px; border-radius: 999px; background: #111827; color: #fff; font-size: .7rem; letter-spacing: .08em; vertical-align: middle; }
.primary-action { display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px; border-radius: 12px; background: var(--red); color: #fff; font-weight: 700; text-decoration: none; }
.guide-tools { position: sticky; top: 24px; grid-column: 1; grid-row: 1 / span 2; }
.language-picker { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin-bottom: 12px; padding: 4px; border: 1px solid var(--border); border-radius: 10px; background: #fff; }
.language-picker button { min-height: 44px; border: 0; border-radius: 7px; background: transparent; color: #344054; cursor: pointer; }
.language-picker button[aria-pressed="true"] { background: var(--red-soft); color: #a30000; font-weight: 700; }
.toc { padding: 16px; border: 1px solid var(--border); border-radius: 12px; background: #fff; }
.toc h2 { margin: 0 0 8px; font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.toc a { display: block; padding: 9px 4px; color: #14181f; text-decoration: none; border-radius: 6px; }
.toc a:hover, .toc a:focus-visible { background: var(--red-soft); }
main { grid-column: 2; grid-row: 2; padding: 8px 36px 32px; border: 1px solid var(--border); border-top: 0; border-radius: 0 0 12px 12px; background: #fff; }
.topic { padding: 28px 0; border-top: 1px solid var(--border); scroll-margin-top: 16px; }
.topic.intro { border-top: 0; padding-top: 4px; }
.topic h2 { margin: 0 0 16px; font-size: 1.4rem; line-height: 1.25; }
.topic p, .topic li { max-width: 68ch; }
.topic p { margin: 0 0 1.1em; }
.topic ul, .topic ol { margin: 0 0 1.2em; padding-left: 1.5em; }
.topic li { margin: 0 0 .6em; }
.topic li:last-child { margin-bottom: 0; }
.topic-copy > :last-child { margin-bottom: 0; }
figure { margin: 24px 0; }
figure img { display: block; max-width: min(100%, 390px); height: auto; border: 1px solid var(--border); border-radius: 14px; }
code { padding: 1px 5px; border-radius: 4px; background: #eef0f3; font-size: .92em; }
.quick-list { padding-left: 20px; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid #7d1d23; outline-offset: 2px; }
@media (max-width: 860px) {
  .wrap { display: block; padding: 16px 12px 64px; }
  .page-header { padding: 20px 18px 8px; }
  main { padding: 4px 18px 24px; }
  .guide-tools { position: static; margin: 12px 0; }
}
@media (prefers-reduced-motion: reduce) { :root { scroll-behavior: auto; } }