:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #fafafa;
  --accent: #2d5be3;
  --muted: #666;
  --border: #e0e0e0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --bg: #14161a;
    --accent: #7aa2ff;
    --muted: #9a9a9a;
    --border: #2a2d33;
  }
}

* {
  box-sizing: border-box;
}

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

.wrap,
#preamble,
#wrap,
#postamble {
  max-width: 1000px;
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

#wrap img {
  display: block;
  max-width: 100%;
  height: auto;
  margin-left: auto;
  margin-right: auto;
}

.wrap {
  padding-top: 3rem;
  padding-bottom: 4rem;
}

/* org-publish output splits header/nav (#preamble), body (#content),
   and footer (#postamble) into separate top-level divs instead of
   one .wrap, so the vertical padding .wrap normally provides has to
   be distributed across them here. */
#preamble {
  padding-top: 3rem;
}

#postamble {
  padding-bottom: 4rem;
}

header h1 {
  font-size: 1.75rem;
  margin: 0 0 0.25rem;
}

header p.tagline {
  color: var(--muted);
  margin: 0 0 2rem;
}

.content header p.subtitle {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: normal;
  margin: 0 0 1.5rem;
}

nav.main-nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

nav.main-nav a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 500;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

nav.main-nav a:hover,
nav.main-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

main a {
  color: var(--accent);
}

footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

.placeholder {
  color: var(--muted);
  font-style: italic;
}