/* layout: media, controls and captions share one grid cell; thumbnails sit below on
   mobile and overlay the bottom-right of the video on desktop */
.video-switcher {
  --video-switcher-radius: 10px;
  --video-switcher-thumb: 70px;
  --video-switcher-thumb-active: 90px;
  --video-switcher-gap: 8px;
  --video-switcher-inset: 20px;
  --video-switcher-bottom: 30px;
  --video-switcher-scrim: color-mix(in srgb, var(--text-color) 75%, transparent);
  --video-switcher-dim: color-mix(in srgb, var(--text-color) 40%, transparent);
  --video-switcher-on-media: var(--background-color);
  --video-switcher-on-media-muted: #b0b1b3;

  display: grid;
  grid-template-columns: minmax(0, 1fr);

  /* the source's space below the component: 16px under the thumbnails (with their 4px focus
     padding); the next component adds its own */
  padding-bottom: 12px;
}

main > .section.video-switcher-container {
  margin-bottom: 0;
}

.video-switcher .video-switcher-media {
  grid-area: 1 / 1;
  position: relative;
  aspect-ratio: 5 / 6;
  overflow: hidden;
  border-radius: var(--video-switcher-radius);
  background-color: var(--dark-color);
}

.video-switcher .video-switcher-media::after {
  content: '';
  position: absolute;
  inset: auto 0 0;
  height: 55%;
  background: linear-gradient(0deg, var(--video-switcher-scrim), transparent);
  pointer-events: none;
}

.video-switcher .video-switcher-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* controls */
.video-switcher .video-switcher-controls {
  grid-area: 1 / 1;
  z-index: 1;
  place-self: start end;
  display: flex;
  gap: var(--video-switcher-gap);
  margin: 16px;
}

.video-switcher .video-switcher-controls button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;

  /* the source's thin white ring on the video, no fill */
  border: 2px solid var(--video-switcher-on-media);
  border-radius: 50%;
  background-color: transparent;
  color: var(--video-switcher-on-media);
  cursor: pointer;

  /* keeps the thin ring and arrow visible over bright video frames */
  filter: drop-shadow(0 0 1px rgb(0 0 0 / 45%));
  transition: background-color 0.2s;
}

.video-switcher .video-switcher-controls button:hover {
  background-color: var(--video-switcher-dim);
}

.video-switcher .video-switcher-controls svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentcolor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* the source hides prev/next on small screens; thumbnails cover navigation there */
.video-switcher .video-switcher-controls .video-switcher-prev,
.video-switcher .video-switcher-controls .video-switcher-next {
  display: none;
}

/* captions */
.video-switcher .video-switcher-captions {
  grid-area: 1 / 1;
  z-index: 1;
  align-self: end;
  display: grid;
  padding: 0 var(--video-switcher-inset) var(--video-switcher-bottom);
  color: var(--video-switcher-on-media);
}

/* all captions share one cell (the inactive ones invisible), so the panel keeps the largest
   caption's size and doesn't move (a layout shift, counted in CLS on auto-advance) when the
   caption changes. Toggled by class, not the hidden attribute, since Bootstrap (loaded after the
   first interaction) forces [hidden] to display: none !important */
.video-switcher .video-switcher-caption {
  grid-area: 1 / 1;
  align-self: end;
}

.video-switcher .video-switcher-caption:not(.video-switcher-caption-active) {
  visibility: hidden;
}

/* the subtitle, as on the source: Manrope medium in light grey, 14px below it */
.video-switcher .video-switcher-caption > * {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 500;
  line-height: 15px;
  color: var(--video-switcher-on-media-muted);
}

.video-switcher .video-switcher-caption > .video-switcher-title {
  margin-bottom: 8px;
  font-size: var(--heading-font-size-m);
  font-weight: 400;
  line-height: 1;
  color: var(--video-switcher-on-media);
}

.video-switcher .video-switcher-caption-active {
  animation: video-switcher-caption-in 0.7s ease-out both;
}

/* thumbnails */
.video-switcher .video-switcher-tabs {
  grid-area: 2 / 1;
  display: flex;
  align-items: flex-start;
  gap: var(--video-switcher-gap);

  /* reserves the active thumbnail's height on top of the padding, so the strip (and the content
     below it) doesn't shift while one thumbnail shrinks and the next grows */
  box-sizing: content-box;
  min-height: var(--video-switcher-thumb-active);

  /* padding keeps focus rings unclipped; negative margin keeps thumbnails aligned to the edge */
  margin: 6px -4px 0;
  padding: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.video-switcher .video-switcher-tab {
  position: relative;
  flex: none;
  width: var(--video-switcher-thumb);
  height: var(--video-switcher-thumb);
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: var(--video-switcher-radius);
  overflow: hidden;
  background-color: var(--light-color);
  cursor: pointer;
  transition: width 0.7s ease-in-out, height 0.7s ease-in-out;
}

.video-switcher .video-switcher-tab::after {
  content: '';
  position: absolute;
  inset: 0;
  background-color: var(--video-switcher-dim);
  transition: opacity 0.7s ease-in-out;
}

.video-switcher .video-switcher-tab:hover::after {
  opacity: 0.5;
}

.video-switcher .video-switcher-tab[aria-selected='true'] {
  width: var(--video-switcher-thumb-active);
  height: var(--video-switcher-thumb-active);
}

.video-switcher .video-switcher-tab[aria-selected='true']::after {
  opacity: 0;
}

.video-switcher .video-switcher-tab img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* focus: light + dark ring stays visible over video frames and on the page background */
.video-switcher .video-switcher-controls button:focus-visible,
.video-switcher .video-switcher-tabs .video-switcher-tab:focus-visible,
.video-switcher .video-switcher-captions:focus-visible {
  outline: 2px solid var(--background-color);
  outline-offset: 0;
  box-shadow: 0 0 0 4px var(--text-color);
}

@keyframes video-switcher-caption-in {
  from {
    opacity: 0;
    transform: translateX(24px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .video-switcher .video-switcher-caption-active {
    animation: none;
  }

  .video-switcher .video-switcher-tab,
  .video-switcher .video-switcher-tab::after {
    transition: none;
  }
}

@media (width >= 992px) {
  .video-switcher {
    --video-switcher-radius: 20px;
    --video-switcher-thumb: 100px;
    --video-switcher-thumb-active: 120px;
    --video-switcher-bottom: 56px;

    grid-template-columns: minmax(0, 1fr) auto;

    /* 40px under the video, as on the source (scaled like the source page below 1440px) */
    padding-bottom: 40px;
  }

  .video-switcher .video-switcher-media {
    grid-column: 1 / -1;
    aspect-ratio: auto;
    height: 670px;
  }

  /* as on the source: 44px rings 20px apart (its 56px-wide buttons around 44px icons), their
     top 16px and right edge 34px in from the video */
  .video-switcher .video-switcher-controls {
    grid-column: 1 / -1;
    gap: 20px;
    margin: 16px 34px;
  }

  .video-switcher .video-switcher-controls .video-switcher-prev,
  .video-switcher .video-switcher-controls .video-switcher-next {
    display: grid;
  }

  .video-switcher .video-switcher-captions {
    grid-column: 1;
    justify-self: end;
    padding: 0 22px var(--video-switcher-bottom) 40px;
    text-align: right;
  }

  .video-switcher .video-switcher-caption > * {
    max-width: 438px;
    margin-left: auto;
    font-size: 22px;
    line-height: 28px;
  }

  .video-switcher .video-switcher-caption > .video-switcher-title {
    max-width: none;
    margin-bottom: 10px;
    font-size: var(--heading-font-size-xxl);
    line-height: 1;
  }

  .video-switcher .video-switcher-tabs {
    grid-area: 1 / 2;
    z-index: 1;
    align-self: end;
    align-items: flex-end;
    min-height: 0;
    margin: 0 26px calc(var(--video-switcher-bottom) - 4px) 0;
  }
}

/* the source zooms the whole page below 1440px, so its 40px under the video shrinks too */
@media (width >= 992px) and (width < 1100px) {
  .video-switcher {
    padding-bottom: 28px;
  }
}

@media (width >= 1100px) and (width < 1200px) {
  .video-switcher {
    padding-bottom: 30px;
  }
}

@media (width >= 1200px) and (width < 1280px) {
  .video-switcher {
    padding-bottom: 32px;
  }
}

@media (width >= 1280px) and (width < 1366px) {
  .video-switcher {
    padding-bottom: 34px;
  }
}

@media (width >= 1366px) and (width < 1440px) {
  .video-switcher {
    padding-bottom: 36px;
  }
}