:root { color-scheme: light; --ink: #233044; --muted: #64748b; --accent: #245d52; --line: #e0e6e4; }
* { box-sizing: border-box; }
body { margin: 0; background: #fafbf9; color: var(--ink); font: 16px/1.7 system-ui, sans-serif; }
a { color: var(--accent); text-underline-offset: 3px; }
.shell { display: grid; grid-template-columns: 270px minmax(0, 1fr); min-height: 100vh; }
.sidebar { padding: 36px 26px; background: #f0f4f1; border-right: 1px solid var(--line); }
.brand { font-size: 21px; font-weight: 750; text-decoration: none; }
.muted, .card p { color: var(--muted); }
.sidebar .muted { font-size: 13px; margin: 4px 0 32px; }
nav a { text-decoration: none; }
.home-link { display: block; margin-bottom: 24px; }
.nav-topic { margin: 22px 0; }
.nav-topic > a { font-weight: 650; }
.nav-topic ul { list-style: none; margin: 8px 0 0; padding-left: 15px; border-left: 1px solid #cbd7d0; }
.nav-topic li { margin: 5px 0; font-size: 14px; }
[aria-current="page"] { font-weight: 750; text-decoration: underline; }
main { padding: 60px clamp(24px, 5vw, 80px); max-width: 1200px; width: 100%; }
h1 { font-size: clamp(30px, 4vw, 44px); line-height: 1.2; letter-spacing: -1px; margin: 12px 0 20px; }
h2 { font-size: 24px; line-height: 1.35; margin-top: 32px; }
h3 { font-size: 19px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; }
.lead { font-size: 18px; color: var(--muted); max-width: 700px; margin-bottom: 36px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 20px; margin-top: 24px; }
.card { display: block; border: 1px solid var(--line); border-radius: 12px; padding: 26px; background: white; color: var(--ink); text-decoration: none; transition: border-color .15s; }
.card:hover { border-color: var(--accent); }
.card h2, .card h3 { margin: 8px 0; }
.card p { margin: 8px 0 0; font-size: 15px; }
.breadcrumbs { font-size: 13px; color: var(--muted); margin-bottom: 28px; }
.prose { max-width: 800px; overflow-wrap: anywhere; }
.prose pre { overflow-x: auto; padding: 18px; background: #edf1ee; border-radius: 8px; }
code { font-family: ui-monospace, monospace; font-size: .9em; }
.prose :not(pre) > code { background: #edf1ee; padding: 2px 5px; border-radius: 4px; }
.prose table { display: block; overflow-x: auto; border-collapse: collapse; }
th, td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.prose blockquote { border-left: 3px solid var(--accent); margin-left: 0; padding-left: 20px; color: var(--muted); }
.back-link { margin-top: 48px; border-top: 1px solid var(--line); padding-top: 20px; }
.skip-link { position: absolute; top: -100px; left: 16px; background: white; padding: 8px 16px; }
.skip-link:focus { top: 12px; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
@media (max-width: 760px) { .shell { grid-template-columns: 1fr; } .sidebar { border-right: 0; border-bottom: 1px solid var(--line); padding: 24px; } .sidebar .muted { margin-bottom: 16px; } .sidebar nav { display: flex; flex-wrap: wrap; gap: 16px 24px; } .home-link, .nav-topic { margin: 0; } main { padding: 32px 24px; } }