:root {
  --pa-header-bg: rgba(11, 15, 26, 0.92);
  --pa-header-border: #2a3550;
  --pa-header-text: #e8ecf4;
  --pa-header-muted: #9aa8c4;
  --pa-header-surface: #1a2236;
  --pa-header-accent: #7c3aed;
  --pa-header-accent-2: #0891b2;
  --pa-header-font: "Inter", system-ui, -apple-system, sans-serif;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--pa-header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--pa-header-border);
  font-family: var(--pa-header-font);
}

.site-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-header .brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--pa-header-text);
  text-decoration: none;
}

.site-header .brand:hover {
  text-decoration: none;
  color: var(--pa-header-text);
}

.brand__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pa-header-accent), var(--pa-header-accent-2));
  flex-shrink: 0;
}

.site-header .nav {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.site-header .nav a {
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  color: var(--pa-header-muted);
  font-size: 0.9rem;
  text-decoration: none;
}

.site-header .nav a:hover,
.site-header .nav a.is-active {
  color: var(--pa-header-text);
  background: var(--pa-header-surface);
  text-decoration: none;
}