.reference-rail {
  padding-top: 1rem;
  padding-bottom: clamp(3rem, 5vw, 5rem);
}

.reference-rail__heading {
  margin-bottom: 1.6rem;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
}

.reference-rail__viewport {
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

.reference-rail.is-looping .reference-rail__viewport {
  overflow: hidden;
}

.reference-rail__track,
.reference-rail__group {
  display: flex;
  width: max-content;
}

.reference-rail__group {
  gap: 1.25rem;
  padding-right: 1.25rem;
}

.reference-rail.is-looping .reference-rail__track {
  animation: reference-rail-drift 58s linear infinite;
}

.reference-rail.is-looping:hover .reference-rail__track,
.reference-rail.is-looping:focus-within .reference-rail__track {
  animation-play-state: paused;
}

.reference-rail__card {
  display: flex;
  flex: 0 0 clamp(260px, 22vw, 320px);
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.reference-rail__card img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  object-position: center top;
}

.reference-rail__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 1.25rem;
}

.reference-rail__body h3 {
  margin: 0;
  color: var(--heading);
  font-size: 1.25rem;
  line-height: 1.2;
}

.reference-rail__body p {
  margin: 0.65rem 0 0;
  color: var(--text-soft);
  font-size: 0.96rem;
  line-height: 1.55;
}

.reference-rail__body a {
  align-self: flex-start;
  margin-top: auto;
  padding-top: 0.9rem;
  color: var(--brand-dark);
  font-size: 0.93rem;
  font-weight: 700;
  text-underline-offset: 0.25em;
}

.reference-rail__body a:hover,
.reference-rail__body a:focus-visible {
  color: var(--brand);
}

@keyframes reference-rail-drift {
  to { transform: translateX(-50%); }
}

@media (max-width: 767px), (prefers-reduced-motion: reduce) {
  .reference-rail.is-looping .reference-rail__viewport {
    overflow-x: auto;
    scroll-snap-type: x proximity;
  }

  .reference-rail.is-looping .reference-rail__track {
    animation: none;
  }

  .reference-rail__group[aria-hidden="true"] {
    display: none;
  }

  .reference-rail__card {
    scroll-snap-align: start;
  }
}

@media (max-width: 767px) {
  .reference-rail__card {
    flex-basis: min(78vw, 300px);
  }
}