:root {
  color-scheme: light;
  --ink: #17202e;
  --muted: #5c6675;
  --line: #dce2ea;
  --paper: #ffffff;
  --soft: #f5f7fa;
  --blue: #2256a3;
  --blue-soft: #edf4ff;
  --max: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

main,
footer {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.intro {
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--line);
}

.label,
.type {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.lead {
  max-width: 700px;
  margin: 24px 0 30px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.primary-link,
.api-card a {
  color: var(--blue);
  font-weight: 700;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.primary-link:focus-visible,
.api-card a:focus-visible {
  outline: 3px solid #9bbef3;
  outline-offset: 4px;
  border-radius: 2px;
}

section {
  padding: 64px 0;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.section-heading h2,
.notes h2 {
  margin: 0;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.api-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.api-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
}

.api-card.featured {
  border-color: #b6c9e7;
  background: var(--blue-soft);
}

.api-card h3 {
  margin: 0 0 14px;
  font-size: 1.3rem;
  line-height: 1.28;
  letter-spacing: -0.02em;
}

.api-card > p:not(.type) {
  margin: 0 0 24px;
  color: var(--muted);
}

.api-card a {
  margin-top: auto;
}

.notes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  border-top: 1px solid var(--line);
}

.notes ol {
  margin: 22px 0 0;
  padding-left: 22px;
}

.notes li + li {
  margin-top: 10px;
}

.notes aside {
  padding: 28px;
  border-radius: 12px;
  background: var(--soft);
}

.notes aside p {
  margin: 16px 0 0;
  color: var(--muted);
}

code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--soft);
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.88em;
}

footer {
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

footer p {
  margin: 0;
}

@media (max-width: 720px) {
  main,
  footer {
    width: min(calc(100% - 28px), var(--max));
  }

  .intro {
    padding: 58px 0 52px;
  }

  section {
    padding: 48px 0;
  }

  .api-grid,
  .notes {
    grid-template-columns: 1fr;
  }

  .api-card {
    min-height: 230px;
  }

  .notes {
    gap: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}