:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --accent: #2563eb;
  --border: #e5e7eb;
  --max-width: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #e5e7eb;
    --muted: #9ca3af;
    --accent: #60a5fa;
    --border: #262b33;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.site-header,
.site-footer {
  padding: 1.25rem;
  border-color: var(--border);
}

.site-header {
  border-bottom: 1px solid var(--border);
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.875rem;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 600;
  color: var(--fg);
}

.nav-links {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.content {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.25rem;
}

.content h1 {
  margin-top: 0;
  line-height: 1.2;
}

.site-footer p {
  max-width: var(--max-width);
  margin: 0 auto;
}