:root {
  color-scheme: light dark;
  --background: hsl(0 0% 95%); --foreground: hsl(0 0% 29%);
  --surface-default: hsl(0 0% 98%); --border: hsl(0 0% 91%);
  --brand: hsl(223 80% 61%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --background: hsl(0 0% 10%); --foreground: hsl(0 0% 83%);
    --surface-default: hsl(0 0% 12%); --border: hsl(0 0% 18%); }
}
* { box-sizing: border-box; }
body { margin: 0; padding: 24px; color: var(--foreground); background: var(--background); line-height: 1.7; overflow-wrap: anywhere; }
.page { width: 100%; margin-inline: auto; }
.brand { font-weight: 700; margin: 0 0 16px; }
h1 { font-size: clamp(2rem, 6vw, 2.75rem); line-height: 1.2; margin-block: 40px 24px; }
h2 { font-size: 1.4rem; line-height: 1.35; margin-top: 2.25em; }
h3 { font-size: 1.1rem; line-height: 1.45; margin-top: 1.75em; }
p, li { margin-block: 1em; } ul { padding-inline-start: 1.5em; }
img { max-width: 100%; height: auto; }
pre { overflow-x: auto; padding: 16px; background: var(--surface-default); border: 1px solid var(--border); border-radius: 8px; }
code { font-size: .9em; } blockquote { margin-inline: 0; padding-inline-start: 20px; border-inline-start: 3px solid var(--border); }
table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; }
th, td { padding: 8px 12px; border: 1px solid var(--border); text-align: start; }
a { color: inherit; text-decoration: underline; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; } a:focus-visible { outline: 2px solid var(--brand); outline-offset: 4px; }
footer { border-top: 1px solid var(--border); padding-top: 24px; margin-top: 48px; }
nav { display: flex; gap: 16px 24px; flex-wrap: wrap; } nav a { padding-block: 10px; }
@media (min-width: 48rem) { body { padding: 40px; } .page { max-width: 76ch; } }