:root {
    color-scheme: dark;
    --bg: #0b1219;
    --surface: #15212b;
    --line: #344450;
    --text: #f4f7f5;
    --muted: #b9c8cf;
    --accent: #8ee8bc;
    --warm: #f4cf83;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.7 "Manrope", Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: #c4ffe2; }
a:focus-visible { outline: 2px solid var(--warm); outline-offset: 4px; }
.wrap { width: min(100% - 32px, 1120px); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: #111b23; }
.header-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; min-height: 72px; }
.brand { color: var(--text); text-decoration: none; font-weight: 800; white-space: nowrap; }
.brand span { color: var(--accent); }
.site-nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: .91rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent); }
.page-heading { padding: 48px 0 30px; border-bottom: 1px solid var(--line); }
.eyebrow { color: var(--warm); font-size: .77rem; font-weight: 800; text-transform: uppercase; }
h1, h2, h3 { font-family: "Chakra Petch", Arial, sans-serif; line-height: 1.2; }
h1 { font-size: 3rem; margin: 12px 0 16px; overflow-wrap: anywhere; }
.lede { color: var(--muted); font-size: 1.12rem; max-width: 760px; margin: 0; }
.byline { display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--muted); font-size: .85rem; margin-top: 20px; }
.content-layout { display: grid; grid-template-columns: minmax(0, 730px) 240px; gap: 48px; padding: 36px 0 80px; }
.article-body { min-width: 0; }
.article-body section { padding: 0 0 24px; }
.article-body section + section { border-top: 1px solid var(--line); padding-top: 24px; }
.article-body h2 { font-size: 1.48rem; margin: 0 0 16px; }
.article-body h3 { font-size: 1.1rem; margin: 25px 0 8px; }
.article-body p { margin: 0 0 16px; }
.article-body p, .article-body li { color: #d6e0e1; }
.article-body ul, .article-body ol { padding-left: 23px; margin: 0 0 18px; }
.article-body li + li { margin-top: 8px; }
.article-body strong { color: var(--text); }
.article-body .note { border-left: 3px solid var(--accent); padding: 12px 16px; background: var(--surface); margin: 22px 0; }
.article-body .note p:last-child { margin-bottom: 0; }
.toc { align-self: start; position: sticky; top: 24px; border-top: 2px solid var(--accent); padding-top: 14px; }
.toc strong { display: block; font-size: .8rem; text-transform: uppercase; margin-bottom: 12px; }
.toc a { display: block; color: var(--muted); text-decoration: none; font-size: .88rem; padding: 5px 0; }
.toc a:hover { color: var(--accent); }
.related { border-top: 1px solid var(--line); padding-top: 22px; margin-top: 8px; }
.related h2 { font-size: 1.2rem; }
.related ul { list-style: none; padding: 0; }
.site-footer { border-top: 1px solid var(--line); padding: 28px 0 42px; background: #111b23; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 18px 44px; justify-content: space-between; }
.footer-inner p { color: var(--muted); font-size: .88rem; max-width: 580px; margin: 6px 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; align-content: start; }
.footer-links a { font-size: .88rem; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 24px; color: var(--muted); font-size: .85rem; }
.directory-heading { display: flex; align-items: flex-start; gap: 20px; }
.directory-heading img { width: 64px; height: 64px; flex: 0 0 64px; margin-top: 14px; }
.article-body .guide-directory { list-style: none; padding: 0; }
.guide-directory li { padding: 20px 0; border-bottom: 1px solid var(--line); }
.guide-directory li:first-child { padding-top: 0; }
.article-body .guide-directory h3 { margin: 0 0 12px; font-size: 1.2rem; }
.diagnostic-table { width: 100%; border-collapse: collapse; margin-bottom: 24px; font-size: .92rem; }
.diagnostic-table th, .diagnostic-table td { padding: 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.diagnostic-table th { color: var(--text); }
.diagnostic-table td { color: #d6e0e1; }
@media (max-width: 850px) {
    .header-inner { align-items: start; flex-direction: column; padding: 16px 0; gap: 12px; }
    .content-layout { grid-template-columns: 1fr; gap: 10px; }
    .toc { position: static; grid-row: 1; padding-bottom: 16px; }
    .toc a { display: inline-block; margin-right: 16px; }
    h1 { font-size: 2rem; }
    .directory-heading { gap: 12px; }
    .directory-heading img { width: 40px; height: 40px; flex-basis: 40px; }
    .diagnostic-table th, .diagnostic-table td { padding: 8px 6px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }