body {
  background: var(--color-bg);
  color: var(--color-text);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem var(--spacing);
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

p.subtitle {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

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

a:hover {
  text-decoration: underline;
}

nav.site-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem var(--spacing);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
}

nav.site-nav .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
}

nav.site-nav .nav-links {
  display: flex;
  gap: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.875rem;
  transition: background 0.15s;
}

.btn:hover { background: var(--color-bg); }

.btn-primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }