:root {
  color: #17202a;
  font: 16px/1.6 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f7f9fc;
}

* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { margin: 0 auto; max-width: 880px; padding: 24px; }
header { align-items: center; display: flex; justify-content: space-between; }
header img { height: 48px; width: 48px; }
nav a { margin-left: 18px; }
main { background: #fff; border: 1px solid #dce3eb; border-radius: 14px; }
h1 { color: #12385b; font-size: clamp(2rem, 7vw, 3.5rem); line-height: 1.05; margin: 0 0 18px; }
h2 { color: #12385b; margin-top: 30px; }
a { color: #145ea8; }
.eyebrow { color: #2d6f73; font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.lead { font-size: 1.2rem; max-width: 680px; }
.callout { background: #eef7f7; border-left: 4px solid #2d8c8c; padding: 14px 18px; }
.cards { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.card { background: #f7f9fc; border-radius: 10px; padding: 16px; }
code { background: #edf1f5; border-radius: 4px; padding: 2px 5px; }
footer { color: #5b6570; font-size: .82rem; }
@media (max-width: 620px) {
  header { align-items: flex-start; display: block; }
  nav { margin-top: 12px; }
  nav a { margin: 0 14px 0 0; }
}