:root {
  color-scheme: light dark;
  --background: #f5f8fe;
  --surface: #ffffff;
  --text: #172c48;
  --muted: #495d78;
  --accent: #145bb6;
  --border: #ced9e9;
  --wash: #e8f1ff;
  font:
    100%/1.65 system-ui,
    sans-serif;
  background: var(--background);
  color: var(--text);
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}
a:hover {
  text-decoration-thickness: 0.15em;
}
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 5px;
}
.site-header,
main,
footer {
  width: min(1200px, calc(100% - 3rem));
  margin-inline: auto;
}
.site-header,
nav,
.brand,
.actions {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  flex-wrap: wrap;
}
.site-header {
  justify-content: space-between;
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.brand {
  color: var(--text);
  font-size: 1.4rem;
  font-weight: 750;
  text-decoration: none;
  gap: 0.65rem;
}
nav a {
  padding-block: 0.6rem;
}
.skip-link {
  position: absolute;
  top: -8rem;
  left: 1rem;
  padding: 1rem;
  background: var(--surface);
  z-index: 1;
}
.skip-link:focus {
  top: 1rem;
}
.hero {
  padding-block: 5rem 3.5rem;
  max-width: 860px;
}
.eyebrow {
  font-size: 0.85rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
}
h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
h1 {
  font-size: clamp(2.7rem, 7vw, 5rem);
  margin-block: 1rem 1.5rem;
}
h1 span {
  color: var(--accent);
}
h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-block: 0.75rem 2rem;
}
h3 {
  font-size: 1.45rem;
  margin-block: 1rem;
}
.lead {
  max-width: 700px;
  font-size: 1.25rem;
  color: var(--muted);
}
.muted,
figcaption {
  color: var(--muted);
  font-size: 0.95rem;
}
.actions {
  margin-block: 2rem;
}
.button {
  display: inline-block;
  border: 1px solid var(--accent);
  border-radius: 0.5rem;
  padding: 0.75rem 1.15rem;
  text-decoration: none;
  font-weight: 650;
}
.primary {
  background: #145bb6;
  border-color: #145bb6;
  color: #ffffff;
}
.preview {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 0.75rem;
  box-shadow: 0 18px 50px #17305212;
}
.preview img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0.5rem;
}
figcaption {
  padding: 0.75rem 0.5rem 0;
}
section[id] {
  padding-top: 4.5rem;
  scroll-margin-top: 1rem;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.card {
  min-width: 0;
  padding: 1.6rem;
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  background: var(--surface);
}
.badge {
  display: inline-block;
  color: var(--accent);
  background: var(--wash);
  font-size: 0.8rem;
  font-weight: 650;
  padding: 0.3rem 0.7rem;
  border-radius: 1rem;
}
pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: var(--wash);
  padding: 1rem;
  border-radius: 0.5rem;
  font-size: 0.83rem;
}
code {
  overflow-wrap: anywhere;
}
summary {
  cursor: pointer;
  padding-block: 0.5rem;
  font-weight: 650;
}
.first-response {
  margin-top: 2rem;
  padding: 1.5rem 2rem;
  border-left: 4px solid var(--accent);
  background: var(--wash);
}
li {
  padding-block: 0.3rem;
}
.closing {
  margin-block: 4.5rem;
  max-width: 800px;
}
footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-block: 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0c1626;
    --surface: #152338;
    --text: #edf3fc;
    --muted: #b6c5db;
    --accent: #91beff;
    --border: #354963;
    --wash: #203551;
  }
}

@media (max-width: 950px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .site-header,
  main,
  footer {
    width: calc(100% - 2rem);
  }
  .hero {
    padding-block: 2.5rem;
  }
  nav {
    gap: 1rem;
  }
  .card,
  .first-response {
    padding: 1.2rem;
  }
}

@media (forced-colors: active) {
  .primary {
    border: 1px solid ButtonText;
  }
}