* { box-sizing: border-box; }
:root { color-scheme: light dark; --bg: #fafafa; --surface: #fff; --text: #202020; --muted: #606060; --border: #e5e5e5; --accent: #6451ca; }
@media (prefers-color-scheme: dark) { :root { --bg: #101010; --surface: #1b1b1b; --text: #f5f5f5; --muted: #b4b4b4; --border: #353535; --accent: #b9aaff; } }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.65 -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; }
a { color: var(--accent); text-underline-offset: 3px; overflow-wrap: anywhere; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
header { background: var(--surface); border-bottom: 1px solid var(--border); }
header nav, main, footer { width: min(1000px, calc(100% - 40px)); margin: auto; }
header nav { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; padding: 22px 0; font-size: 14px; }
.wordmark { font-size: 21px; font-weight: 750; color: var(--text); text-decoration: none; margin-right: auto; }
main { padding: 30px 0 56px; }
h1 { margin: 12px 0; font-size: clamp(32px, 5vw, 48px); line-height: 1.15; letter-spacing: -1px; }
h2 { font-size: 23px; line-height: 1.3; margin: 30px 0 12px; }
p, li { max-width: 75ch; }
p { margin: 12px 0 20px; }
li { margin-bottom: 12px; }
.lead { font-size: 23px; color: var(--muted); line-height: 1.4; }
.breadcrumb, .updated { font-size: 14px; color: var(--muted); }
.downloads, .contents { display: flex; gap: 16px; flex-wrap: wrap; margin: 24px 0; }
.button { display: inline-block; padding: 12px 18px; background: var(--text); color: var(--surface); border-radius: 10px; font-size: 15px; font-weight: 600; text-decoration: none; }
.contents { padding: 18px 0; border-block: 1px solid var(--border); font-size: 15px; }
section { scroll-margin-top: 20px; }
.guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 32px; }
.guide-grid article { border: 1px solid var(--border); padding: 22px; border-radius: 16px; background: var(--surface); }
.guide-grid h2 { margin-top: 0; }
.guide-grid p { font-size: 16px; }
footer { padding: 24px 0; border-top: 1px solid var(--border); font-size: 14px; color: var(--muted); }
.skip-link { position: absolute; top: -100px; left: 20px; background: var(--surface); padding: 12px; }
.skip-link:focus { top: 10px; }
@media (max-width: 600px) { .guide-grid { grid-template-columns: minmax(0, 1fr); } .lead { font-size: 20px; } header nav { gap: 12px; } .contents { flex-direction: column; gap: 12px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }