/* Keep the same model silhouette and aspect ratio at both ends of navigation. */
@view-transition {
  navigation: auto;
}

[data-model-art="embodied"] {
  view-transition-name: robot-embodied;
}

[data-model-art="quadruped"] {
  view-transition-name: robot-quadruped;
}

[data-model-art="drone"] {
  view-transition-name: robot-drone;
}

[data-model-art="llm"] {
  view-transition-name: robot-llm;
}

[data-model-art="transformer"] {
  view-transition-name: robot-transformer;
}

.preview [data-model-art] {
  display: block;
  height: auto;
  max-width: 100%;
  overflow: visible;
}

.preview [data-model-art="embodied"] {
  width: 175px;
  aspect-ratio: 7 / 9;
}

.preview [data-model-art="quadruped"] {
  width: calc(225px * 19 / 13);
  aspect-ratio: 19 / 13;
}

.preview [data-model-art="drone"] {
  width: 250px;
  aspect-ratio: 10 / 9;
}

.preview [data-model-art="llm"] {
  width: 360px;
  aspect-ratio: 8 / 5;
}

.preview [data-model-art="transformer"] {
  width: 250px;
  aspect-ratio: 10 / 9;
}

.rotor-sweep { stroke-dasharray: 4 7; stroke-width: 1.2; opacity: 0.55; }
.drone-wire { stroke-dasharray: 3 5; }

.preview .part-line,
.preview .part-surface {
  stroke: currentColor;
  stroke-width: 4.5;
}

.preview .part-surface {
  fill: rgba(255, 255, 255, 0.45);
}

.preview .detail-line {
  stroke: #99a2a5;
  stroke-width: 2.2;
}

.preview [data-model-art="embodied"] .part-line,
.preview [data-model-art="embodied"] .part-surface,
.preview [data-model-art="drone"] .part-line,
.preview [data-model-art="drone"] .part-surface {
  stroke-width: 3.1;
}

.preview [data-model-art="embodied"] .part-surface,
.preview [data-model-art="drone"] .part-surface {
  fill: rgba(255, 255, 255, 0.65);
}

.preview [data-model-art="embodied"] .detail-line,
.preview [data-model-art="drone"] .detail-line {
  stroke: #9aa4a7;
  stroke-width: 1.5;
}

.model [data-model-art] {
  display: block;
}

.model[data-model="embodied"] {
  width: min(78vw, 590px, calc((100svh - 112px) * 7 / 9));
  height: auto;
  aspect-ratio: 7 / 9;
}

.model[data-model="quadruped"] {
  width: min(92vw, 880px, calc(82vh * 19 / 13), calc(600px * 19 / 13));
  height: auto;
  aspect-ratio: 19 / 13;
}

.model[data-model="drone"] {
  width: min(94vw, 860px, calc((100svh - 112px) * 10 / 9));
  height: auto;
  aspect-ratio: 10 / 9;
}

.back-home {
  position: fixed;
  top: max(18px, env(safe-area-inset-top));
  left: max(18px, env(safe-area-inset-left));
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--ink);
  background: rgba(255, 255, 252, 0.9);
  font-size: 14px;
  text-decoration: none;
  transition: background 180ms ease, transform 180ms ease;
}

.back-home:hover {
  background: #fff;
  transform: translateX(-3px);
}

.back-home:focus-visible {
  outline: 3px solid rgba(var(--accent-rgb), 0.35);
  outline-offset: 4px;
}

::view-transition-group(root) {
  animation-duration: 640ms;
}

::view-transition-old(root) {
  animation: atlas-fade-out 200ms ease-out both;
}

::view-transition-new(root) {
  animation: atlas-fade-in 360ms 160ms ease-out both;
}

::view-transition-group(robot-embodied),
::view-transition-group(robot-quadruped),
::view-transition-group(robot-drone),
::view-transition-group(robot-llm),
::view-transition-group(robot-transformer) {
  z-index: 1;
  overflow: visible;
  animation-duration: 640ms;
  animation-timing-function: cubic-bezier(0.22, 0.8, 0.2, 1);
}

::view-transition-old(robot-embodied),
::view-transition-old(robot-quadruped),
::view-transition-old(robot-drone),
::view-transition-old(robot-llm),
::view-transition-new(robot-embodied),
::view-transition-new(robot-quadruped),
::view-transition-new(robot-drone),
::view-transition-new(robot-llm),
::view-transition-old(robot-transformer),
::view-transition-new(robot-transformer) {
  height: 100%;
  object-fit: contain;
  mix-blend-mode: normal;
}

/* Use one sharp model during the zoom instead of cross-fading two outlines. */
::view-transition-old(robot-embodied):only-child,
::view-transition-old(robot-quadruped):only-child,
::view-transition-old(robot-drone):only-child,
::view-transition-old(robot-llm):only-child,
::view-transition-old(robot-transformer):only-child {
  animation: atlas-fade-out 180ms ease-out both;
}

::view-transition-old(robot-embodied):not(:only-child),
::view-transition-old(robot-quadruped):not(:only-child),
::view-transition-old(robot-drone):not(:only-child),
::view-transition-old(robot-llm):not(:only-child),
::view-transition-old(robot-transformer):not(:only-child) {
  animation: none;
  opacity: 0;
}

::view-transition-new(robot-embodied),
::view-transition-new(robot-quadruped),
::view-transition-new(robot-drone),
::view-transition-new(robot-llm),
::view-transition-new(robot-transformer) {
  animation: none;
}

::view-transition-new(robot-embodied):only-child,
::view-transition-new(robot-quadruped):only-child,
::view-transition-new(robot-drone):only-child,
::view-transition-new(robot-llm):only-child,
::view-transition-new(robot-transformer):only-child {
  animation: atlas-fade-in 360ms 160ms ease-out both;
}

/* These classes are used only by the fallback for older browsers. */
.model-departing .report-card {
  overflow: visible;
}

.model-departing [data-model-art] {
  will-change: transform, opacity;
}

@keyframes atlas-fade-out {
  to { opacity: 0; }
}

@keyframes atlas-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 720px) {
  .model[data-model="embodied"] {
    width: min(96vw, 560px, calc((100svh - 112px) * 7 / 9), calc(700px * 7 / 9));
  }

  .model[data-model="quadruped"] {
    width: min(98vw, calc(74vh * 19 / 13), calc(560px * 19 / 13));
  }

  .back-home {
    top: max(12px, env(safe-area-inset-top));
    left: max(12px, env(safe-area-inset-left));
  }
}

@media (prefers-reduced-motion: reduce) {
  @view-transition {
    navigation: none;
  }

  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }

  .report-card:hover,
  .report-card:hover .preview svg,
  .back-home:hover {
    transform: none;
  }
}