:root {
  color-scheme: light dark;
  --bg: #f7f7f7;
  --fg: #111;
  --accent: #2563eb;
  --muted: #555;
  --max-width: 760px;
  --radius: 6px;
}

* { box-sizing: border-box; }

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

main {
  max-width: var(--max-width);
  padding: 2.5rem 1.25rem 3rem;
  margin: 0 auto;
}

header { margin-bottom: 2rem; }

h1 {
  font-size: 2rem;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

h3 {
  font-size: 1.05rem;
  margin-top: 1.5rem;
  margin-bottom: 0.35rem;
}

p { margin: 0.25rem 0 0.75rem; }

ul {
  padding-left: 1.2rem;
  margin: 0.25rem 0 0.75rem;
}

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

a:hover { text-decoration: underline; }

.tagline {
  font-size: 1.05rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

/* Pill — identical for <span> and <a> */
.pill {
  display: inline-block;
  padding: 0.15rem 0.65rem;
  border-radius: 999px;
  background: #e5edff;
  color: #1e3a8a;
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
  text-decoration: none;
}

a.pill:visited { color: #1e3a8a; }
a.pill:hover { text-decoration: none; filter: brightness(0.98); }

.section {
  padding: 1.25rem 1rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
  margin-bottom: 1rem;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.cta {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: #eef2ff;
  font-size: 0.95rem;
}

.cta strong {
  display: block;
  margin-bottom: 0.35rem;
}

footer {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Post page helpers */
.topnav {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}

.topnav a { font-size: 0.95rem; }

.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

/* Article typography */
article h1 { margin-top: 0.25rem; }

article blockquote {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid rgba(37, 99, 235, 0.7);
  background: rgba(37, 99, 235, 0.06);
  border-radius: 6px;
}

article ul { margin-top: 0.5rem; }

.topnav .pill {
  font-size: 0.8rem;
}