/* Horizontal scroll
   Mobile uses a native swipe rail. On desktop, JS maps the section's vertical
   scroll progress to the rail while the inner content remains sticky. */

.horizontal-scroll {
  --horizontal-scroll-card-width: clamp(15rem, 74vw, 19rem);
  --horizontal-scroll-gutter: 1rem;
  --horizontal-scroll-heading-color-end: var(--color-primary-dark);
  --horizontal-scroll-heading-color-start: var(--color-white);
  --horizontal-scroll-heading-progress: 0%;

  background-color: var(--color-oxford);
  padding-top: 4rem;
  padding-bottom: 4rem;
}
.horizontal-scroll__inner {
  min-width: 0;
  position: relative;
}

.horizontal-scroll__flair {
  height: auto;
  pointer-events: none;
  position: absolute;
  width: 1181px;
  z-index: 0;
}

.horizontal-scroll__flair--center-left {
  left: -300px;
  top: 50%;
  transform: translateY(-50%) scale(.8);
}

.horizontal-scroll__flair--top-left {
  left: -300px;
  top: -260px;
  transform: scale(.8);
}

.horizontal-scroll__flair--bottom-left {
  bottom: -260px;
  left: -300px;
  transform: scale(.8);
}

.horizontal-scroll__flair--center-right {
  right: -550px;
  top: 50%;
  transform: translateY(-50%) scale(.8);
}

.horizontal-scroll__flair--top-right {
  right: -550px;
  top: -260px;
  transform: scale(.8);
}

.horizontal-scroll__flair--bottom-right {
  bottom: -260px;
  right: -550px;
  transform: scale(.8);
}

.horizontal-scroll__intro {
  display: flex;
  flex: 0 0 clamp(18rem, 82vw, 34rem);
  flex-direction: column;
  gap: var(--space-4);
  scroll-snap-align: start;
}

.horizontal-scroll__heading {
  color: var(--horizontal-scroll-heading-color-start);
  color: color-mix(
    in srgb,
    var(--horizontal-scroll-heading-color-start) calc(100% - var(--horizontal-scroll-heading-progress)),
    var(--horizontal-scroll-heading-color-end) var(--horizontal-scroll-heading-progress)
  );
}

.horizontal-scroll__intro-text {
  color: var(--color-dark2);
  margin-top: 2rem;
}

.horizontal-scroll--text-light .horizontal-scroll__intro-text,
.horizontal-scroll--text-light .horizontal-scroll__card-title,
.horizontal-scroll--text-light .horizontal-scroll__card-text {
  color: #fff;
}

/* Native horizontal swipe rail. */

.horizontal-scroll__viewport {
  cursor: grab;
  -webkit-overflow-scrolling: touch;
  margin-inline: calc(50% - 50vw);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  position: relative;
  scroll-padding-inline: var(--horizontal-scroll-gutter);
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  touch-action: pan-x;
  width: 100vw;
  z-index: 1;
}

.horizontal-scroll__viewport.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
  user-select: none;
}

.horizontal-scroll__viewport::-webkit-scrollbar {
  display: none;
}

.horizontal-scroll__track {
  align-items: flex-start;
  display: flex;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0 var(--horizontal-scroll-gutter) var(--space-3);
}

.horizontal-scroll__card {
  flex: 0 0 var(--horizontal-scroll-card-width);
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.horizontal-scroll__end-spacer {
  display: block;
  flex: 0 0 var(--horizontal-scroll-card-width);
  inline-size: var(--horizontal-scroll-card-width);
  min-inline-size: var(--horizontal-scroll-card-width);
  pointer-events: none;
  scroll-snap-align: none;
}

.horizontal-scroll__card-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  height: 100%;
}

.horizontal-scroll__media {
  overflow: hidden;
  position: relative;
}

.horizontal-scroll__image {
  display: block;
  height: auto;
  width: 100%;
}

/* Decorative frosted-glass motif in the bottom-right of each card image.
   Six 28px cells form an L within a 3x3 grid (empty cells are not rendered):
     .   .   1
     .   2   3
     4   5   6
   Cells 3 and 5 use the lighter Figma opacity (0.2); the others use 0.4. */
.horizontal-scroll__pattern {
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(3, 28px);
  grid-template-rows: repeat(3, 28px);
  height: 84px;
  pointer-events: none;
  position: absolute;
  right: 0;
  width: 84px;
}

.horizontal-scroll__pattern-cell {
  -webkit-backdrop-filter: blur(15px);
  backdrop-filter: blur(15px);
  background: rgba(255, 255, 255, 0.4);
}

.horizontal-scroll__pattern-cell:nth-child(1) { grid-area: 1 / 3; }
.horizontal-scroll__pattern-cell:nth-child(2) { grid-area: 2 / 2; }
.horizontal-scroll__pattern-cell:nth-child(3) { grid-area: 2 / 3; }
.horizontal-scroll__pattern-cell:nth-child(4) { grid-area: 3 / 1; }
.horizontal-scroll__pattern-cell:nth-child(5) { grid-area: 3 / 2; }
.horizontal-scroll__pattern-cell:nth-child(6) { grid-area: 3 / 3; }

.horizontal-scroll__pattern-cell:nth-child(3),
.horizontal-scroll__pattern-cell:nth-child(5) {
  background: rgba(255, 255, 255, 0.2);
}

/* Fallback for browsers without backdrop-filter (e.g. Safari < 18):
   keep the squares legible with a slightly stronger flat white. */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .horizontal-scroll__pattern-cell {
    background: rgba(255, 255, 255, 0.5);
  }

  .horizontal-scroll__pattern-cell:nth-child(3),
  .horizontal-scroll__pattern-cell:nth-child(5) {
    background: rgba(255, 255, 255, 0.3);
  }
}

.horizontal-scroll__card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--space-4);
}

.horizontal-scroll__card-title {
  color: var(--color-primary-dark);
}

.horizontal-scroll__card-text {
  color: var(--color-text);
}

.horizontal-scroll__card-body .horizontal-scroll__card-link {
  margin-top: var(--space-6);
}

/* Mobile/tablet: keep the native horizontal rail so the next tile peeks in. */

@media (max-width: 1023px) {
  .horizontal-scroll__track {
    gap: var(--space-5);
  }

  .horizontal-scroll__intro,
  .horizontal-scroll__card {
    flex-basis: var(--horizontal-scroll-card-width);
  }

  .horizontal-scroll__card[aria-hidden="true"] {
    flex-basis: var(--horizontal-scroll-gutter);
    inline-size: var(--horizontal-scroll-gutter);
  }
}

/* Desktop sizing. */

@media (min-width: 1024px) {
  .horizontal-scroll {
    --horizontal-scroll-card-width: clamp(18rem, 22vw, 22rem);
  }

  .horizontal-scroll.is-scroll-driven {
    height: calc(100vh + var(--horizontal-scroll-distance, 0px));
    padding-block: 0;
  }

  .horizontal-scroll.is-scroll-driven .horizontal-scroll__inner {
    align-items: center;
    display: flex;
    height: 100vh;
    position: sticky;
    top: 0;
  }

  .horizontal-scroll.is-scroll-driven .horizontal-scroll__viewport {
    cursor: default;
    flex: 0 0 100vw;
    overflow-x: hidden;
    scroll-snap-type: none;
    width: 100vw;
  }

  .horizontal-scroll__intro {
    flex-basis: clamp(20rem, 30vw, 30rem);
  }

  .horizontal-scroll__viewport {
    min-width: 0;
  }

  .horizontal-scroll__track {
    align-items: center;
    gap: var(--space-12);
  }

}

@media (min-width: 1440px) {
  .horizontal-scroll {
    --horizontal-scroll-gutter: max(
      2.5rem,
      calc((100vw - 1500px) / 2 + 2.5rem)
    );
  }
}