:root {
  color-scheme: light;
  --ink: #1f2933;
  --muted: #5c6975;
  --line: #d9e1e8;
  --paper: #ffffff;
  --wash: #f3f6f8;
  --accent: #126e82;
  --accent-soft: #e5f2f4;
  --max: 980px;
}

* { box-sizing: border-box; }
html { background: var(--wash); }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--accent); }
.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}
.brand { color: var(--ink); text-decoration: none; font-weight: 750; letter-spacing: .01em; }
.nav-links { display: flex; flex-wrap: wrap; gap: 18px; }
.nav-links a { text-decoration: none; font-size: .95rem; }
main { max-width: var(--max); margin: 0 auto; padding: 64px 24px 80px; }
.eyebrow { color: var(--accent); font-size: .82rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.2; letter-spacing: 0; }
h1 { max-width: 760px; margin: 12px 0 20px; font-size: clamp(2.3rem, 6vw, 4.6rem); }
h2 { margin-top: 48px; font-size: 1.55rem; }
h3 { margin-top: 28px; font-size: 1.05rem; }
.lede { max-width: 720px; color: var(--muted); font-size: 1.2rem; }
.intro { border-left: 4px solid var(--accent); padding: 4px 0 4px 18px; margin: 30px 0; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 26px; }
.panel { border: 1px solid var(--line); padding: 22px; background: #fff; }
.panel h3 { margin-top: 0; }
.panel p:last-child, .panel ul:last-child { margin-bottom: 0; }
ul { padding-left: 22px; }
code { color: #075985; background: var(--accent-soft); padding: 2px 5px; border-radius: 3px; }
.endpoint { display: inline-block; margin-top: 6px; padding: 10px 12px; background: var(--accent-soft); border: 1px solid #c8e3e7; }
footer { border-top: 1px solid var(--line); color: var(--muted); max-width: var(--max); margin: 0 auto; padding: 22px 24px 40px; font-size: .9rem; }
@media (max-width: 680px) {
  .nav { align-items: flex-start; flex-direction: column; gap: 10px; }
  main { padding-top: 42px; }
  .grid { grid-template-columns: 1fr; }
  h1 { font-size: 2.55rem; }
}