/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #78716c;
  --border: #e7e5e4;
  --accent: #b45309;
  --accent-light: #fef3c7;
  --card-bg: #ffffff;
  --sidebar-bg: #f5f5f4;
  --max-width: 1100px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
}

body {
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ── */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  background: var(--card-bg);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.site-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.site-title:hover { text-decoration: none; color: var(--accent); }
.site-tagline {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.2rem;
}
.header-nav {
  margin-top: 0.8rem;
  display: flex;
  gap: 1.5rem;
}
.header-nav a {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 500;
}
.header-nav a:hover { color: var(--accent); text-decoration: none; }

/* ── Layout ── */
.site-content { padding: 2rem; }
.content-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
}

/* ── Sidebar ── */
.sidebar {
  position: sticky;
  top: 2rem;
  align-self: start;
}
.sidebar-nav h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 1.5rem 0 0.4rem;
}
.sidebar-nav h4:first-child { margin-top: 0; }
.sidebar-nav ul { list-style: none; }
.sidebar-nav li { margin: 0.2rem 0; }
.sidebar-nav a {
  font-size: 0.85rem;
  color: var(--fg);
  display: block;
  padding: 0.15rem 0;
}
.sidebar-nav a:hover { color: var(--accent); text-decoration: none; }

/* ── Main Content ── */
.main-content {
  min-width: 0;
}

/* ── Wiki Page ── */
.wiki-header { margin-bottom: 1.5rem; }
.wiki-header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}
.wiki-tags {
  margin-top: 0.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tag {
  font-size: 0.75rem;
  background: var(--accent-light);
  color: var(--accent);
  padding: 0.15rem 0.6rem;
  border-radius: 9999px;
  font-weight: 500;
}
.wiki-meta {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  gap: 1rem;
}
.wiki-meta .category { text-transform: capitalize; }

/* ── Prose ── */
.wiki-body h1 { font-size: 2rem; font-weight: 700; margin: 2rem 0 0.8rem; letter-spacing: -0.03em; }
.wiki-body h2 { font-size: 1.4rem; font-weight: 600; margin: 2rem 0 0.6rem; letter-spacing: -0.02em; border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
.wiki-body h3 { font-size: 1.1rem; font-weight: 600; margin: 1.5rem 0 0.5rem; }
.wiki-body p { margin: 0.8rem 0; }
.wiki-body ul, .wiki-body ol { margin: 0.8rem 0; padding-left: 1.5rem; }
.wiki-body li { margin: 0.3rem 0; }
.wiki-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  color: var(--muted);
  background: var(--sidebar-bg);
  border-radius: 0 4px 4px 0;
}
.wiki-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--sidebar-bg);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}
.wiki-body pre {
  background: var(--fg);
  color: #e7e5e4;
  padding: 1rem 1.2rem;
  border-radius: 6px;
  overflow-x: auto;
  margin: 1rem 0;
  line-height: 1.5;
}
.wiki-body pre code {
  background: none;
  padding: 0;
  color: inherit;
}
.wiki-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.wiki-body th, .wiki-body td {
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--border);
  text-align: left;
}
.wiki-body th {
  background: var(--sidebar-bg);
  font-weight: 600;
}
.wiki-body strong { font-weight: 600; }
.wiki-body hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

/* ── Home ── */
.hero {
  text-align: center;
  padding: 2rem 0 1.5rem;
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}
.hero-subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  margin-top: 0.5rem;
}
.hero-tagline {
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.home-summary {
  max-width: 700px;
  margin: 0 auto 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 1.05rem;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}
.card h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.8rem;
}
.card ul { list-style: none; }
.card li { margin: 0.4rem 0; font-size: 0.9rem; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  margin-top: 3rem;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .content-wrapper {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .sidebar {
    position: static;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
    margin-bottom: 1rem;
  }
  .sidebar-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0 2rem;
  }
  .sidebar-nav h4 { margin-top: 0.8rem; }
  .home-grid {
    grid-template-columns: 1fr;
  }
  .hero h1 { font-size: 2rem; }
}