:root {
  color-scheme: light dark;
  --font-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 72ch;
  --accent: #2d7ff9;
}

body {
  margin: 0;
  font-family: var(--font-body);
  line-height: 1.6;
  color: #1a1a1a;
  background: #ffffff;
}

header {
  background: #0f172a;
  color: #f8fafc;
  padding: 1rem;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

nav a {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

main {
  max-width: var(--max-width);
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.article-list {
  list-style: none;
  padding: 0;
}

.article-list li {
  margin-bottom: 1.5rem;
}

.article-list a {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent);
}

.toc {
  background: #f1f5f9;
  border-left: 4px solid var(--accent);
  padding: 1rem;
  margin: 2rem 0;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  padding: 0;
  margin: 0 0 1rem;
}

.breadcrumbs li::after {
  content: "/";
  margin-left: 0.5rem;
}

.breadcrumbs li:last-child::after {
  content: "";
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  background: #0f172a;
  color: #f8fafc;
}