.rsc__header {
  max-width: 820px;
  margin-bottom: var(--space-2xl);
}

.rsc__eyebrow {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-primary);
  line-height: 1.4;
}

.rsc__heading {
  margin: 0 0 var(--space-md);
  font-size: clamp(26px, 4vw + 0.5rem, 60px);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--clr-primary);
}

.rsc__subtext {
  margin: 0;
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--clr-primary);
  opacity: 0.75;
}

/* Flow grid — horizontal scroller on mobile, grid on tablet+ */
.rsc__flow {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 78%;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: var(--space-sm);
  justify-content: safe center;
}

.rsc__flow::-webkit-scrollbar { display: none; }

@media (min-width: 768px) {
  .rsc__flow {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow-x: visible;
    scroll-snap-type: none;
    padding-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .rsc__flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.rsc__flow-card {
  scroll-snap-align: start;
  background: var(--clr-white);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  min-height: 240px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s ease;
}

.rsc__flow-card:hover {
  border-color: var(--clr-primary);
}

.rsc__flow-label {
  margin: 0 0 var(--space-md);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-brand-accent);
}

.rsc__flow-title {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--clr-primary);
}

.rsc__flow-body {
  margin: 0;
  font-size: var(--font-size-sm);
  font-weight: 300;
  line-height: 1.65;
  color: var(--clr-primary);
  opacity: 0.75;
}

/* Compounds */
.rsc__compounds {
  margin-bottom: var(--space-2xl);
}

.rsc__compounds-label {
  margin: 0 0 var(--space-md);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-primary);
  opacity: 0.65;
}

.rsc__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.rsc__chip {
  display: inline-flex;
  align-items: center;
  padding: var(--space-sm) 20px;
  background: var(--clr-bg-card-secondary);
  border-radius: 100px;
  font-family: var(--font-serif);
  font-size: var(--font-size-base);
  line-height: 1.3;
  color: var(--clr-primary);
  transition: background-color 0.3s ease, transform 0.3s ease;
  cursor: default;
}

.rsc__chip:hover {
  background: var(--clr-brand-accent);
  transform: translateY(-2px);
  color: var(--clr-text-inverse);
}

/* Study callout */
.rsc__study {
  max-width: 900px;
}

.rsc__study-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: flex-start;
  background: var(--clr-bg-card-secondary);
  border-left: 3px solid var(--clr-primary);
  border-radius: var(--radius-md);
  padding: 28px 32px;
}

.rsc__study-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(60, 66, 46, 0.08);
  color: var(--clr-primary);
  flex-shrink: 0;
}

.rsc__study-icon-img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  display: block;
}

.rsc__study-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.rsc__study-text {
  margin: 0;
  font-size: var(--font-size-sm);
  font-weight: 300;
  line-height: 1.7;
  color: var(--clr-primary);
}

.rsc__study-cite {
  margin: 0;
  font-size: var(--font-size-xs);
  font-weight: 300;
  line-height: 1.5;
  color: var(--clr-primary);
  opacity: 0.65;
}