/* Shared category navigation for the two Research pages. */
.research-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  grid-template-areas: "content sidebar";
  gap: 32px;
  align-items: start;
}
.research-sidebar {
  grid-area: sidebar;
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.research-sidebar h2 {
  margin: 0;
  padding: 18px 20px;
  background: var(--primary);
  color: #fff;
  font-size: 1.25rem;
}
.research-sidebar ul { list-style: none; margin: 0; padding: 8px; }
.research-sidebar li { margin: 0; }
.research-sidebar a {
  display: block;
  padding: 12px;
  border-radius: 6px;
  line-height: 1.4;
}
.research-sidebar a:hover { background: var(--bg); }
.research-sidebar a.active {
  color: var(--primary);
  background: #f2e9f4;
  font-weight: 650;
}
.research-sidebar a:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }
.research-content { grid-area: content; min-width: 0; }
@media (max-width: 760px) {
  .research-layout { grid-template-columns: minmax(0, 1fr); grid-template-areas: "sidebar" "content"; gap: 24px; }
  .research-sidebar ul { display: flex; flex-wrap: wrap; gap: 4px; }
  .research-sidebar li { flex: 1 1 150px; }
}