:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --surface: #12151a;
  --border: #252a33;
  --fg: #e8eaed;
  --muted: #9aa3b2;
  --accent: #6ea8fe;
  --code-bg: #1a1f28;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

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

.sidebar {
  width: 260px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--surface);
  padding: 1.25rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
}

.brand-sub {
  margin: 0.25rem 0 1rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.nav-link {
  display: block;
  padding: 0.45rem 0.65rem;
  border-radius: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.nav-link:hover {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.04);
}

.nav-link.active {
  color: var(--fg);
  background: rgba(110, 168, 254, 0.12);
}

.sidebar-foot {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.sidebar-foot a {
  color: var(--accent);
}

.content {
  flex: 1;
  min-width: 0;
  padding: 2rem 2.5rem 4rem;
  max-width: 52rem;
}

.prose h1 {
  font-size: 1.85rem;
  margin-top: 0;
}

.prose h2 {
  margin-top: 2rem;
  font-size: 1.25rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}

.prose h3 {
  margin-top: 1.5rem;
  font-size: 1.05rem;
}

.prose p,
.prose li {
  color: #c8cdd6;
}

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

.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.12em 0.35em;
  border-radius: 4px;
}

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

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

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1rem 0;
}

.prose th,
.prose td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
}

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

@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
  }
  .content {
    padding: 1.25rem 1rem 3rem;
  }
}