.research-stream-layout.has-stream-tabs {
  display: grid;
  grid-template-columns: minmax(15rem, .8fr) minmax(0, 1.75fr);
  align-items: start;
  gap: clamp(1rem, 3vw, 2.25rem);
}

.research-stream-controls {
  display: grid;
  gap: .35rem;
  padding: .4rem;
  border: 1px solid var(--cp-purple-100);
  border-radius: var(--radius-lg);
  background: var(--cp-bg-soft);
}

.research-stream-controls button {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: .75rem;
  min-height: 3rem;
  padding: .75rem .85rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--cp-text);
  font-weight: var(--font-semibold);
  line-height: 1.35;
  text-align: left;
}

.research-stream-controls button::after {
  content: '›' / '';
  color: var(--cp-purple-600);
  font-size: 1.3rem;
}

.research-stream-controls button:hover {
  background: var(--cp-white);
}

.research-stream-controls button[aria-selected="true"] {
  border-color: var(--cp-purple-100);
  border-inline-start: 3px solid var(--cp-purple-600);
  background: var(--cp-white);
  color: var(--cp-purple-700);
}

#areas-heading,
.research-streams .research-pillar {
  scroll-margin-top: calc(var(--nav-height) + var(--sp-4));
}

.research-streams .research-pillar {
  display: block;
  min-width: 0;
}

.research-streams .research-pillar[hidden] {
  display: none;
}

.research-streams .research-pillar-visual {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  column-gap: var(--sp-4);
  row-gap: var(--sp-2);
  background: var(--cp-purple-50);
  border-bottom: 1px solid var(--cp-purple-100);
}

.research-streams .pillar-num {
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  margin: 0;
  border-radius: var(--radius-md);
  background: var(--cp-white);
  color: var(--cp-purple-700);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
}

.research-streams .research-pillar-visual h3 {
  margin: 0;
  color: var(--cp-purple-900);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

.research-streams .research-pillar-visual p {
  grid-column: 2;
  max-width: 74ch;
  color: var(--cp-gray-700);
}

.research-streams .research-pillar-body ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: var(--sp-6);
}

@media (max-width: 760px) {
  .research-stream-layout.has-stream-tabs,
  .research-streams .research-pillar-body ul {
    grid-template-columns: minmax(0, 1fr);
  }

  .research-streams .research-pillar-visual p {
    grid-column: 1 / -1;
  }

  .research-streams .pillar-num {
    grid-row: auto;
  }
}