:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f4f5;
  --color-text: #1a1a1a;
  --color-text-muted: #5a5a5a;
  --color-border: #dddddd;
  --color-accent: #1a5fb4;
  --color-code-bg: #f0f0f2;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas,
    "Liberation Mono", Menlo, monospace;

  --content-width: 70ch;
  --sidebar-width: 260px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #16181c;
    --color-bg-alt: #1e2126;
    --color-text: #e6e6e6;
    --color-text-muted: #a0a0a0;
    --color-border: #33363c;
    --color-accent: #6cb2ff;
    --color-code-bg: #1e2126;
  }
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light dark;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

.layout {
  display: flex;
  align-items: flex-start;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  padding: var(--space-3) var(--space-2);
  border-right: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.content {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  min-width: 0;
}

.page {
  max-width: var(--content-width);
  margin: 0 auto;
}

.section-index .section-page-list {
  max-width: var(--content-width);
  margin: var(--space-3) auto 0;
  list-style: none;
  padding: 0;
}

.section-page-list li {
  padding: var(--space-2) 0;
  border-top: 1px solid var(--color-border);
}

.section-page-list li p {
  margin: 0.25rem 0 0;
  color: var(--color-text-muted);
}

.nav-home {
  display: block;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  text-decoration: none;
  margin-bottom: var(--space-2);
}

.nav-sections {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-section {
  margin-bottom: var(--space-2);
}

.nav-section-title {
  display: block;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-text);
  padding: 0.2rem 0;
}

.nav-section-title.is-current,
.nav-section-title:hover {
  color: var(--color-accent);
}

.nav-pages {
  list-style: none;
  margin: 0.2rem 0 0;
  padding-left: var(--space-2);
  border-left: 1px solid var(--color-border);
}

.nav-pages li {
  margin: 0.15rem 0;
}

.nav-pages a {
  display: block;
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.92rem;
  padding: 0.1rem 0;
}

.nav-pages a:hover,
.nav-pages a[aria-current="page"] {
  color: var(--color-accent);
}

.nav-glossary {
  display: block;
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumbs {
  max-width: var(--content-width);
  margin: 0 auto var(--space-3);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.breadcrumbs a {
  color: var(--color-text-muted);
}

.crumb-sep {
  margin: 0 0.4rem;
}

.crumb-current {
  color: var(--color-text);
}

.page-header h1 {
  margin-bottom: 0.3rem;
}

.page-summary {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-top: 0;
}

.page-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  display: flex;
  gap: var(--space-2);
}

.page-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0;
  margin: var(--space-1) 0 var(--space-3);
}

.page-tags li {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.1rem 0.7rem;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.page pre,
.page code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.page code {
  background: var(--color-code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.page pre {
  background: var(--color-code-bg);
  padding: var(--space-2);
  border-radius: 6px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
}

.page pre code {
  background: none;
  padding: 0;
}

.page blockquote {
  margin: var(--space-2) 0;
  padding: 0.2rem var(--space-2);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text-muted);
}

.page table {
  border-collapse: collapse;
  width: 100%;
  margin: var(--space-2) 0;
}

.page th,
.page td {
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.6rem;
  text-align: left;
}

.site-footer {
  text-align: center;
  padding: var(--space-3);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}

@media (max-width: 800px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .content {
    padding: var(--space-3) var(--space-2);
  }
}