:root {
  color-scheme: light dark;
  --ink: #111;
  --muted: #5c5c5c;
  --line: #e4e4e4;
  --paper: #fff;
  --accent: #0a66ff;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #f2f2f2; --muted: #a3a3a3; --line: #2a2a2a; --paper: #0b0b0b; --accent: #4d8dff; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.6; }
a { color: var(--accent); }
header, main, footer { max-width: 44rem; margin: 0 auto; padding: 0 1.5rem; }
header { display: flex; justify-content: space-between; align-items: center; padding-top: 1.5rem; }
header a.brand { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 1.125rem; }
nav a { color: var(--muted); text-decoration: none; margin-left: 1.25rem; font-size: .9375rem; }
.hero { padding: 12vh 0 8vh; }
.hero h1 { font-size: clamp(2.25rem, 6vw, 3.5rem); line-height: 1.08; letter-spacing: -.02em; margin: 0 0 1.25rem; }
.hero p { font-size: 1.1875rem; color: var(--muted); margin: 0; max-width: 34rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1rem; margin-bottom: 4rem; }
.card { border: 1px solid var(--line); border-radius: 16px; padding: 1.25rem 1.5rem; }
.card h2 { font-size: 1.0625rem; margin: 0 0 .375rem; }
.card p { margin: 0; color: var(--muted); font-size: .9375rem; }
section.plain { margin-bottom: 4rem; }
section.plain h2 { font-size: 1.375rem; margin-bottom: .5rem; }
article { padding: 3rem 0 4rem; }
article h1 { font-size: 2.25rem; line-height: 1.15; margin-bottom: .25rem; }
article h2 { font-size: 1.25rem; margin-top: 2.25rem; }
.updated { color: var(--muted); margin-top: 0; }
footer { border-top: 1px solid var(--line); padding-top: 1.5rem; padding-bottom: 3rem; color: var(--muted); font-size: .875rem; }
footer a { color: var(--muted); margin-right: 1rem; }