:root {
  color-scheme: light dark;
  --bg: #f7f7f4;
  --surface: #ffffff;
  --surface-muted: #ededeb;
  --text: #1d2328;
  --muted: #5b6670;
  --line: #d7d9d6;
  --accent: #126c83;
  --accent-strong: #0f5364;
  --accent-soft: #dceff3;
  --code-bg: #eef2f1;
  --shadow: 0 18px 45px rgba(34, 41, 47, 0.08);
  --shadow-soft: 0 10px 30px rgba(34, 41, 47, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101416;
    --surface: #171d20;
    --surface-muted: #20282b;
    --text: #edf1f2;
    --muted: #a9b4b8;
    --line: #2e393d;
    --accent: #66c5d7;
    --accent-strong: #9eddea;
    --accent-soft: #17333a;
    --code-bg: #11191c;
    --shadow: 0 18px 45px rgba(0, 0, 0, 0.25);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.18);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: var(--accent-strong);
  text-decoration-color: color-mix(in srgb, var(--accent) 65%, transparent);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent);
}

a:focus-visible,
main:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 20;
  transform: translateY(-150%);
  border: 1px solid var(--accent-strong);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  background: var(--surface);
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform 160ms ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent-strong);
  font-size: 0.82rem;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a {
  color: inherit;
  text-decoration: none;
}

.section {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
  min-height: calc(72vh - 5rem);
}

.hero h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(3rem, 10vw, 7rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-text {
  max-width: 680px;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.72rem 1rem;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease;
}

.button.primary {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
  color: #ffffff;
}

.button:hover {
  transform: translateY(-1px);
}

.focus-panel,
.doc-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.focus-panel {
  padding: 1.4rem;
}

.focus-panel h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
}

.focus-panel ul {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.doc-card {
  display: flex;
  min-height: 160px;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.25rem;
  text-decoration: none;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.doc-card:hover,
.doc-card:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.doc-card h2 {
  margin: 0 0 0.6rem;
  color: var(--text);
  font-size: 1.15rem;
  line-height: 1.25;
}

.doc-card p {
  margin: 0;
  color: var(--muted);
}

.content {
  border-top: 1px solid var(--line);
}

.prose {
  max-width: 900px;
}

.prose h1,
.prose h2,
.prose h3 {
  line-height: 1.15;
  letter-spacing: 0;
}

.prose h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.prose h2 {
  margin-top: 2.4rem;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
}

.prose h3 {
  margin-top: 2rem;
  font-size: 1.35rem;
}

.prose p,
.prose li {
  color: var(--muted);
}

.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.prose table {
  display: block;
  overflow-x: auto;
  width: 100%;
  border-collapse: collapse;
}

.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.7rem;
}

.prose th {
  background: var(--surface-muted);
  color: var(--text);
}

.prose code {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.12rem 0.3rem;
  background: var(--code-bg);
  color: var(--text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.prose pre {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  background: var(--code-bg);
}

.prose pre code {
  border: 0;
  padding: 0;
  background: transparent;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem clamp(1rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer a {
  font-weight: 700;
  text-decoration: none;
}

@media (max-width: 880px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .doc-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.75rem;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .section {
    width: min(100% - 1rem, 1120px);
    padding: clamp(2.5rem, 12vw, 4rem) 0;
  }

  .hero h1 {
    font-size: clamp(3rem, 18vw, 4.8rem);
  }

  .doc-grid {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}