:root {
  color-scheme: light dark;
  --text: #1a1a1a;
  --muted: #555;
  --link: #2563eb;
  --bg: #fff;
  --card: #f5f5f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f5f5f7;
    --muted: #a1a1aa;
    --link: #60a5fa;
    --bg: #111;
    --card: #1c1c1e;
  }
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  color: var(--text);
  background: var(--bg);
}

header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--muted) 30%, transparent);
}

.brand {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.35rem;
}

h1 {
  font-size: 1.85rem;
  line-height: 1.2;
  margin: 0;
}

.updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

h2 {
  font-size: 1.1rem;
  margin: 1.75rem 0 0.5rem;
}

p, li { color: color-mix(in srgb, var(--text) 88%, var(--muted)); }

a { color: var(--link); }

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 1rem;
  font-size: 0.95rem;
}

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 1.25rem 1.35rem;
  margin-top: 1.25rem;
}

.card h2 { margin-top: 0; }

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-list li + li { margin-top: 0.75rem; }