/* =============================================
   Supplement Radar — category-nav.css
   Sticky horizontal category nav bar
   ============================================= */

.category-nav-wrap {
  position: sticky;
  top: var(--header-height);
  z-index: 80;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.category-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  white-space: nowrap;
}

.category-nav::-webkit-scrollbar {
  display: none;
}

.category-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
}

.category-pill:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
  text-decoration: none;
}

.category-pill.active {
  background: var(--color-accent);
  color: var(--color-magenta);
  border-color: var(--color-accent);
  font-weight: 700;
}

.category-pill.active:hover {
  background: var(--color-accent-hover);
  text-decoration: none;
}

/* Research dark theme overrides */
.research-page .category-nav-wrap {
  background: var(--color-bg-alt);
  border-bottom-color: var(--color-border);
}

.research-page .category-pill {
  color: var(--color-text-muted);
}

.research-page .category-pill:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.research-page .category-pill.active {
  background: var(--color-accent);
  color: var(--color-magenta);
  font-weight: 700;
}