/* --- Site Header --- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-nav) 85%, transparent);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header h1 {
  font-size: var(--text-xl);
  margin: 0;
}

.site-header h1 a {
  color: var(--color-text);
  text-decoration: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.site-slogan {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.site-nav {
  display: flex;
  gap: var(--space-md);
}

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color 0.15s;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
}