.top-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  padding: 10px 16px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(180%) blur(8px);
}

.top-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  transition: background .15s ease, color .15s ease;
}

.top-nav a:hover {
  background: var(--accent);
  color: var(--primary-700);
}

.top-nav a.active {
  background: var(--accent);
  color: var(--primary-700);
  font-weight: 600;
  border: 1px solid var(--border);
}