/* One stage pins while the camera visits each app. */
.tour {
  --span: 100svh;
  position: relative;
  height: calc(var(--span) * 8);
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

.pin {
  position: sticky;
  top: 0;
  height: var(--span);
  overflow: clip;
}

.pin .hero {
  position: absolute;
  inset: 0 0 auto;
  z-index: 1;
}

.pin .model {
  position: absolute;
  inset: 0;
  max-width: none;
}

.world {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
}

.world .stage {
  max-width: none;
}

.stop {
  position: absolute;
  left: 0;
  width: 1px;
  height: 1px;
}

/* Screen rows land on sixteenths as the reader arrives. */
.grow .block.slab {
  animation: none;
}

.block.slab {
  opacity: 0;
  visibility: hidden;
  translate: 0 calc(-1 * var(--step));
  transition:
    opacity 0.1s ease-out,
    translate 0.1s ease-out,
    visibility 0s 0.1s;
}

.block.slab.up {
  opacity: 1;
  visibility: visible;
  translate: 0 0;
  transition:
    opacity 0.2s cubic-bezier(0.2, 0.8, 0.3, 1) var(--at),
    translate 0.2s cubic-bezier(0.2, 0.8, 0.3, 1) var(--at);
}

.clip {
  position: absolute;
  top: 0;
  left: 0;
  width: 320px;
  height: 180px;
  object-fit: fill;
  transform-origin: 0 0;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.1s ease-out,
    visibility 0s 0.1s;
}

.clip.up {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s ease-out var(--at);
}

/* The copy owns a plain strip beside the model. */
.copy {
  position: absolute;
  inset: 0 auto 0 0;
  z-index: 1;
  display: grid;
  align-items: center;
  box-sizing: border-box;
  width: 38%;
  padding: 0 3vw 0 7vw;
  background: var(--page);
  translate: -100% 0;
  transition: translate 0.2s cubic-bezier(0.2, 0.8, 0.3, 1);
}

.touring .copy {
  translate: 0 0;
}

:root[data-theme="dark"] {
  --page: #252525;
}

.copy article {
  display: grid;
  grid-area: 1 / 1;
  gap: 1rem;
  justify-items: start;
  align-content: center;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.15s ease-out,
    visibility 0s 0.15s;
}

.copy article.current {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s ease-out 0.1s;
}

.acts {
  display: flex;
  gap: 2rem;
  align-items: baseline;
}

.get,
.toggle-clip {
  font-size: 1.0625rem;
  opacity: 0;
  transition: opacity 0.15s ease-out;
}

.toggle-clip {
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  font-size: 1.0625rem;
  font-weight: 300;
  color: var(--quiet);
  cursor: pointer;
}

.copy:hover :is(.get, .toggle-clip),
.copy article:focus-within :is(.get, .toggle-clip) {
  opacity: 1;
}

.rail {
  position: absolute;
  top: 50%;
  right: 2rem;
  z-index: 1;
  display: grid;
  gap: 0.5rem;
  translate: 0 -50%;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.15s ease-out,
    visibility 0s 0.15s;
}

.touring .rail {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s ease-out;
}

.rail a {
  display: block;
  padding: 0.25rem;
}

.rail .stage {
  width: 1.25rem;
}

.rail .block {
  transition: translate 0.15s ease-out;
}

.rail a:hover .block,
.rail a:focus-visible .block {
  translate: 0 -4px;
}

.rail a[aria-current] .block {
  --ink: var(--accent);
}

@media (hover: none) {
  .get,
  .toggle-clip {
    opacity: 1;
  }
}

@media (max-width: 760px) {
  .copy {
    inset: 58% 0 0;
    align-items: start;
    width: auto;
    padding: 2rem 1.5rem 0;
    translate: 0 100%;
  }

  .rail {
    top: 30%;
    right: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .copy,
  .block.slab,
  .block.slab.up,
  .clip,
  .clip.up,
  .copy article,
  .copy article.current,
  .rail,
  .touring .rail,
  .rail .block,
  .get,
  .toggle-clip {
    transition: none;
  }
}