:root {
  color-scheme: light;
  --bg: #f3f6fb;
  --surface: #ffffff;
  --surface-muted: #eaf0f9;
  --text: #172033;
  --muted: #5a6578;
  --border: #d5deeb;
  --accent: #005bd7;
  --accent-strong: #0047a8;
  --header: #091a33;
  --header-text: #f7f9fd;
  --code-bg: #101827;
  --code-text: #e8edf5;
  --shadow: 0 14px 34px rgb(25 44 76 / 10%);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a1020;
  --surface: #111a2d;
  --surface-muted: #18243b;
  --text: #e8edf5;
  --muted: #abb6c8;
  --border: #2b3852;
  --accent: #77adff;
  --accent-strong: #a8caff;
  --header: #070d19;
  --header-text: #f7f9fd;
  --code-bg: #070c16;
  --code-text: #e8edf5;
  --shadow: 0 14px 34px rgb(0 0 0 / 28%);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0a1020;
    --surface: #111a2d;
    --surface-muted: #18243b;
    --text: #e8edf5;
    --muted: #abb6c8;
    --border: #2b3852;
    --accent: #77adff;
    --accent-strong: #a8caff;
    --header: #070d19;
    --header-text: #f7f9fd;
    --code-bg: #070c16;
    --code-text: #e8edf5;
    --shadow: 0 14px 34px rgb(0 0 0 / 28%);
  }
}

* {
  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;
  font-size: 1rem;
  line-height: 1.75;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.55rem 0.8rem;
  transform: translateY(-160%);
  border-radius: 0.35rem;
  background: var(--surface);
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid rgb(255 255 255 / 12%);
  background: var(--header);
  color: var(--header-text);
}

.site-header a {
  color: var(--header-text);
  text-decoration: none;
}

.site-brand,
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.site-brand {
  min-width: 0;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.brand-mark {
  display: inline-grid;
  width: 2.45rem;
  height: 2.45rem;
  place-items: center;
  flex: none;
  border: 1px solid rgb(255 255 255 / 28%);
  border-radius: 0.45rem;
  background: #0b63ce;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.header-actions {
  font-size: 0.9rem;
}

.theme-toggle {
  min-width: 4.2rem;
  padding: 0.42rem 0.7rem;
  border: 1px solid rgb(255 255 255 / 30%);
  border-radius: 0.35rem;
  background: transparent;
  color: var(--header-text);
  font: inherit;
  cursor: pointer;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  background: rgb(255 255 255 / 12%);
}

.site-shell {
  display: grid;
  grid-template-columns: minmax(13rem, 16rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  max-width: 91rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3.5rem);
}

.sidebar {
  position: sticky;
  top: 6rem;
  align-self: start;
}

.nav-label {
  margin: 0 0 0.7rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.sidebar ul,
.mobile-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar a,
.mobile-nav a {
  display: block;
  padding: 0.48rem 0.7rem;
  border-left: 2px solid transparent;
  color: var(--muted);
  text-decoration: none;
}

.sidebar a:hover,
.mobile-nav a:hover,
.sidebar a[aria-current="page"],
.mobile-nav a[aria-current="page"] {
  border-left-color: var(--accent);
  color: var(--text);
  background: var(--surface-muted);
}

.doc-content {
  min-width: 0;
  max-width: 74rem;
}

.doc-content article {
  padding: clamp(1.35rem, 4vw, 3.4rem);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.doc-content h1,
.doc-content h2,
.doc-content h3 {
  line-height: 1.3;
  scroll-margin-top: 5.5rem;
}

.doc-content h1 {
  margin-top: 0;
  font-size: clamp(1.8rem, 4vw, 2.55rem);
  letter-spacing: -0.035em;
}

.doc-content h2 {
  margin-top: 2.6rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
  font-size: clamp(1.35rem, 3vw, 1.7rem);
}

.doc-content h3 {
  margin-top: 2rem;
}

.doc-content p,
.doc-content ul,
.doc-content ol {
  max-width: 76ch;
}

.doc-content table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-spacing: 0;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.doc-content th,
.doc-content td {
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--border);
  vertical-align: top;
  text-align: left;
}

.doc-content th {
  background: var(--surface-muted);
}

.doc-content pre {
  max-width: 100%;
  overflow: auto;
  padding: 1rem 1.1rem;
  border-radius: 0.55rem;
  background: var(--code-bg);
  color: var(--code-text);
  line-height: 1.55;
}

.doc-content code {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

.doc-content :not(pre) > code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--border);
  border-radius: 0.3rem;
  background: var(--surface-muted);
}

.doc-content blockquote {
  margin: 1.5rem 0;
  padding: 0.75rem 1rem;
  border-left: 0.25rem solid var(--accent);
  background: var(--surface-muted);
  color: var(--muted);
}

.doc-content blockquote > :first-child {
  margin-top: 0;
}

.doc-content blockquote > :last-child {
  margin-bottom: 0;
}

.mobile-nav {
  display: none;
  margin-bottom: 1rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 0.55rem;
  background: var(--surface);
}

.mobile-nav summary {
  cursor: pointer;
  font-weight: 650;
}

.mobile-nav nav {
  margin-top: 0.65rem;
}

.page-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.25rem;
  padding: 0 0.3rem;
  color: var(--muted);
  font-size: 0.87rem;
}

@media (max-width: 760px) {
  .site-header {
    position: static;
  }

  .site-brand > :last-child {
    overflow: hidden;
    max-width: 13rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .site-shell {
    display: block;
    padding: 1rem;
  }

  .sidebar {
    display: none;
  }

  .mobile-nav {
    display: block;
  }

  .doc-content article {
    padding: 1.25rem;
    border-radius: 0.55rem;
  }

  .page-footer {
    flex-direction: column;
  }
}