:root {
  color-scheme: light dark;
  --background: #faf9f6;
  --surface: #ffffff;
  --text: #222222;
  --muted: #65645f;
  --cyan: #285db3;
  --mint: #65645f;
  --line: #deddd8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--background);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", Inter, sans-serif;
}

a { color: var(--cyan); }

.shell {
  width: min(760px, calc(100% - 36px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
}

.brand {
  color: var(--text);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
}

nav { display: flex; gap: 18px; }
nav a { color: var(--muted); font-size: 14px; text-decoration: none; }
nav a:hover { color: var(--text); }

main { padding: 72px 0 96px; }

.hero { padding: 48px 0 36px; }
.eyebrow { color: var(--muted); font-size: 14px; font-weight: 400; }
h1 { margin: 10px 0 14px; font-size: clamp(42px, 8vw, 68px); line-height: 1.02; letter-spacing: -0.055em; }
h2 { margin: 42px 0 10px; font-size: 24px; letter-spacing: -0.025em; }
h3 { margin: 26px 0 6px; font-size: 18px; }
p, li { color: var(--muted); }
.lead { max-width: 610px; font-size: 19px; }

.links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 34px; }
.card {
  display: block;
  padding: 24px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  text-decoration: none;
}
.card span { display: block; margin-top: 4px; color: var(--muted); font-size: 14px; }
.card:hover { border-color: var(--muted); }

.document {
  padding: 34px;
  background: var(--surface);
  border-radius: 16px;
}
.document h1 { font-size: clamp(36px, 7vw, 52px); }
.updated { color: var(--mint); font-size: 13px; font-weight: 700; }
ul { padding-left: 22px; }

footer { padding: 28px 0 40px; color: var(--muted); border-top: 1px solid var(--line); font-size: 13px; }

@media (prefers-color-scheme: dark) {
  :root {
    --background: #131313;
    --surface: #1c1c1c;
    --text: #eeeeec;
    --muted: #aaa9a4;
    --cyan: #8bb6ff;
    --mint: #aaa9a4;
    --line: #343434;
  }
}

@media (max-width: 600px) {
  header { align-items: flex-start; gap: 16px; }
  nav { gap: 12px; }
  main { padding-top: 34px; }
  .links { grid-template-columns: 1fr; }
  .document { padding: 24px 20px; }
}