:root {
  --bg: #f3f5f8; --ink: #101a24; --muted: #4a5967; --line: rgba(16, 26, 36, 0.15); --pen: #1b3bb3;
  --head: "Charter", "Bitstream Charter", "Sitka Text", Cambria, "Iowan Old Style", Georgia, serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1520; --ink: #eaf0f6; --muted: #a6b4c2; --line: rgba(234, 240, 246, 0.17); --pen: #8fa8ff; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 17px/1.65 var(--body); padding-inline: 20px; }
a { color: var(--pen); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--pen); outline-offset: 3px; }
.wrap { max-width: 720px; margin-inline: auto; padding-block: 24px 64px; }
.brand { font: 700 1.2rem var(--head); color: var(--ink); text-decoration: none; }
h1 { font: 700 clamp(1.9rem, 5vw, 2.6rem)/1.15 var(--head); margin: 40px 0 8px; }
h2 { font: 700 1.25rem/1.25 var(--head); margin: 32px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 1.2rem; }
.meta { color: var(--muted); font-size: 0.92rem; }
footer { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }