.mountain-gallery {
  margin: 0 10vw 120px;
}

.mountain-gallery__intro {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.mountain-gallery__intro h2 {
  margin-left: auto;
  font-size: clamp(38px, 4vw, 64px);
  line-height: .95;
  letter-spacing: -.07em;
  text-align: right;
}

.mountain-gallery__intro h2 em {
  color: var(--blue);
  font-style: normal;
}

.mountain-gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.mountain-gallery__item {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  background: var(--dark);
  aspect-ratio: 4 / 3;
}

.mountain-gallery__item--feature {
  grid-column: span 2;
  aspect-ratio: 16 / 9;
}

.mountain-gallery__item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform .7s cubic-bezier(.2,.7,.2,1), filter .7s ease;
}

.mountain-gallery__item:first-child img {
  object-position: center 58%;
}

.mountain-gallery__item:nth-child(2) img {
  object-position: center 48%;
}

.mountain-gallery__item:hover img {
  transform: scale(1.035);
  filter: saturate(1.05);
}

@media (max-width: 850px) {
  .mountain-gallery {
    margin: 0 7vw 78px;
  }

  .mountain-gallery__intro {
    display: block;
    margin-bottom: 24px;
  }

  .mountain-gallery__intro h2 {
    margin-top: 18px;
    text-align: left;
  }

  .mountain-gallery__grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .mountain-gallery__item--feature {
    grid-column: span 2;
  }
}

@media (max-width: 520px) {
  .mountain-gallery__grid {
    grid-template-columns: 1fr;
  }

  .mountain-gallery__item,
  .mountain-gallery__item--feature {
    grid-column: auto;
    aspect-ratio: 4 / 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mountain-gallery__item img {
    transition: none;
  }
}

/* Streaming-style route rail for the mountain-guiding page */
.mountain-gallery {
  margin: 0 0 120px;
  padding: 32px 10vw 42px;
  background: var(--dark);
  color: #fff;
  overflow: hidden;
}
.mountain-gallery__intro { margin-bottom: 26px; }
.mountain-gallery__intro h2 { color: #fff; }
.mountain-gallery__intro h2 em { color: var(--lime); }
.mountain-gallery__grid {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.35) transparent;
  padding-bottom: 12px;
  counter-reset: mountain-item;
}
.mountain-gallery__grid::-webkit-scrollbar { height: 6px; }
.mountain-gallery__grid::-webkit-scrollbar-thumb { background: rgba(255,255,255,.35); border-radius: 99px; }
.mountain-gallery__item,
.mountain-gallery__item--feature {
  position: relative;
  flex: 0 0 clamp(220px, 27vw, 360px);
  height: 270px;
  aspect-ratio: auto;
  grid-column: auto;
  scroll-snap-align: start;
  border: 1px solid rgba(255,255,255,.16);
}
.mountain-gallery__item--feature { flex-basis: clamp(280px, 38vw, 520px); }
.mountain-gallery__item::after {
  content: '';
  position: absolute;
  inset: 35% 0 0;
  background: linear-gradient(transparent, rgba(2,18,42,.78));
  pointer-events: none;
}
.mountain-gallery__item::before {
  content: counter(mountain-item, decimal-leading-zero);
  counter-increment: mountain-item;
  position: absolute;
  z-index: 2;
  top: 13px;
  left: 14px;
  color: rgba(255,255,255,.8);
  font-size: 11px;
  letter-spacing: .12em;
}
.mountain-gallery__item:hover img { transform: scale(1.06); filter: saturate(1.1) brightness(.92); }

@media (max-width: 850px) {
  .mountain-gallery { margin: 0 0 78px; padding: 26px 7vw 32px; }
  .mountain-gallery__intro h2 { margin-top: 14px; text-align: left; }
  .mountain-gallery__item,
  .mountain-gallery__item--feature { flex-basis: 76vw; height: 230px; }
}

@media (max-width: 520px) {
  .mountain-gallery__item,
  .mountain-gallery__item--feature { flex-basis: 82vw; height: 230px; }
}