:root { --bg: #f6f7fb; --card: #ffffff; --fg: #111827; --muted: #5b6475; --rule: #dde2ec; --accent: #0047ab; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1117; --card: #161b22; --fg: #e8ecf3; --muted: #9aa4b5; --rule: #2a313c; --accent: #4d8dea; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg);
       font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif; }
a { color: var(--accent); }
.site { max-width: 46rem; margin: 0 auto; padding: 2rem 1.25rem 3rem; }
.site-header { display: flex; align-items: center; gap: .75rem; margin-bottom: 2rem; }
.site-header a { display: flex; align-items: center; gap: .6rem; color: var(--fg); text-decoration: none; font-weight: 700; font-size: 1.15rem; }
.logo { width: 34px; height: 34px; border-radius: 9px; background: var(--accent); display: grid; place-items: center; }
h1 { font-size: 2rem; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 .25rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
h3 { font-size: 1rem; margin: 1.25rem 0 .25rem; }
p, li { color: var(--fg); }
.lede { color: var(--muted); margin: 0 0 1.5rem; }
.card { background: var(--card); border: 1px solid var(--rule); border-radius: 14px; padding: 1rem 1.25rem; margin: 1rem 0; }
ul { padding-left: 1.2rem; }
li { margin: .3rem 0; }
code { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: .9em; }
.site-footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: .9rem;
               display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; }
.site-footer a { color: var(--muted); }