:root {
  --color-bg: #fdfdfc;
  --color-bg-alt: #f4f1ea;
  --color-text: #2b2620;
  --color-text-muted: #6b6459;
  --color-heading: #1c1712;
  --color-accent: #a15c2b;
  --color-accent-strong: #7d4620;
  --color-border: #e4ddd0;
  --color-code-bg: #f0ece2;
  --color-link: #8a4a1f;
  --max-width: 44rem;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1b1815;
    --color-bg-alt: #241f1a;
    --color-text: #e8e2d6;
    --color-text-muted: #a89e8d;
    --color-heading: #f5f0e6;
    --color-accent: #e0a570;
    --color-accent-strong: #f0bd8c;
    --color-border: #3a332a;
    --color-code-bg: #26211b;
    --color-link: #e0a570;
  }
}

* {
  box-sizing: border-box;
}

html {
  background-color: var(--color-bg);
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-alt);
}

.site-header .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-header a.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--color-heading);
  letter-spacing: 0.02em;
}

.site-header nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-header nav a:hover {
  color: var(--color-accent);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

.page-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.25;
  color: var(--color-heading);
  margin: 0 0 0.4rem;
}

.page-meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 2.2rem;
}

article :is(h1, h2, h3, h4, h5, h6) {
  font-family: var(--font-serif);
  color: var(--color-heading);
  line-height: 1.3;
  margin-top: 2.2em;
  margin-bottom: 0.6em;
}

article > h1:first-child {
  display: none;
}

article h2 {
  font-size: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.3em;
}

article h3 {
  font-size: 1.2rem;
}

article p {
  margin: 1em 0;
}

article a {
  color: var(--color-link);
  text-decoration-color: var(--color-border);
  text-underline-offset: 0.15em;
}

article a:hover {
  text-decoration-color: currentColor;
}

article ul,
article ol {
  padding-left: 1.4em;
  margin: 1em 0;
}

article li + li {
  margin-top: 0.35em;
}

article blockquote {
  margin: 1.4em 0;
  padding: 0.2em 1.2em;
  border-left: 3px solid var(--color-accent);
  background-color: var(--color-bg-alt);
  color: var(--color-text-muted);
}

article code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background-color: var(--color-code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

article pre {
  background-color: var(--color-code-bg);
  padding: 1em 1.2em;
  border-radius: 8px;
  overflow-x: auto;
}

article pre code {
  background: none;
  padding: 0;
}

article hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5em 0;
}

article img {
  max-width: 100%;
  border-radius: 6px;
}

article table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.95em;
}

article th,
article td {
  border: 1px solid var(--color-border);
  padding: 0.5em 0.7em;
  text-align: left;
  vertical-align: top;
}

article th {
  background-color: var(--color-bg-alt);
  font-family: var(--font-serif);
}

.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-decoration: none;
}

.back-link:hover {
  color: var(--color-accent);
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  text-align: center;
}

/* Index page */
.intro {
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
}

.doc-group {
  margin-bottom: 2.5rem;
}

.doc-group h2 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-heading);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.4em;
  margin-bottom: 0.9em;
}

.doc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.doc-list a {
  display: block;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  text-decoration: none;
  background-color: var(--color-bg-alt);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.doc-list a:hover {
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.doc-list .doc-title {
  font-weight: 600;
  color: var(--color-heading);
}

@media (max-width: 640px) {
  main {
    padding: 1.8rem 1.1rem 3.5rem;
  }
  .page-title {
    font-size: 1.6rem;
  }
}