/* Concepts pages - external stylesheet for browser caching */

body {
  max-width: 65ch;
  margin: 0 auto;
  padding: 2rem 1rem;
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
}

@media (prefers-color-scheme: dark) {
  html { background: #111; color: #ddd; }
  a { color: #8bf; }
  a:visited { color: #555; }
}

a:visited { color: #999; }

.nav {
  margin-bottom: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  align-items: center;
}

.nav a { white-space: nowrap; }

.nav-right { margin-left: auto; }

ul, ol { padding-left: 1.5rem; }
li { margin: 0.3rem 0; }

h1 { font-size: 1.5rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.2rem; margin-top: 2rem; color: #666; }
h3 { font-size: 1rem; margin-top: 1.5rem; }

@media (prefers-color-scheme: dark) { h2 { color: #999; } }

hr { border: none; border-top: 1px solid #ddd; margin: 2rem 0; }

@media (prefers-color-scheme: dark) { hr { border-top-color: #333; } }

.summary { color: #666; font-style: italic; margin-bottom: 1.5rem; }

@media (prefers-color-scheme: dark) { .summary { color: #999; } }

.meta { font-size: 0.85rem; color: #888; margin-top: 2rem; }

.count { color: #666; margin-bottom: 2rem; }

@media (prefers-color-scheme: dark) { .count { color: #999; } }

.entries { margin-top: 2rem; }

.entry { margin-bottom: 1.5rem; }
.entry-title { font-weight: bold; }
.entry-summary { color: #666; font-size: 0.9rem; }

@media (prefers-color-scheme: dark) { .entry-summary { color: #999; } }

.category { font-size: 0.8rem; color: #888; margin-left: 0.5rem; }