/* The hierarchy stays anchored. Motion describes signals becoming structure. */
.local-section[data-classify-motion] .classify-art > span {
  --branch-width: 14px;
  --phase: -6s;
  animation: none;
  opacity: 1;
}
.local-section[data-classify-motion] .classify-art > span:nth-child(2) {
  --branch-width: 29px;
  --phase: -5s;
}
.local-section[data-classify-motion] .classify-art > span:nth-child(3) {
  --branch-width: 44px;
  --phase: -4s;
}

/* 1. A small signal travels along each existing branch and lights its label. */
.local-section[data-classify-motion="trace"] .classify-art > span {
  animation: classify-arrival 6s ease-in-out var(--phase) infinite;
}
.local-section[data-classify-motion="trace"] .classify-art > span::after {
  content: "";
  position: absolute;
  top: 12px;
  left: calc(-1 * var(--branch-width));
  width: 6px;
  height: 2px;
  border-radius: 1px;
  background: #d6d6d0;
  animation: classify-trace 6s ease-in-out var(--phase) infinite;
}
@keyframes classify-trace {
  0%, 5% { opacity: 0; transform: translateX(0); }
  12% { opacity: .8; transform: translateX(0); }
  30% { opacity: .8; transform: translateX(calc(var(--branch-width) - 5px)); }
  36%, 100% { opacity: 0; transform: translateX(calc(var(--branch-width) - 5px)); }
}
@keyframes classify-arrival {
  0%, 18%, 65%, 100% { color: #bfbfba; border-color: #3d3d3a; background-color: transparent; }
  34%, 43% { color: #e4e4df; border-color: #85857e; background-color: #141414; }
}

/* 2. Abstract bricks resolve into readable fields, one level at a time. */
.local-section[data-classify-motion="resolve"] .classify-art > span {
  animation: classify-arrival 6s ease-in-out var(--phase) infinite;
}
.local-section[data-classify-motion="resolve"] .classify-label {
  display: inline-block;
  animation: classify-reveal 6s ease-in-out var(--phase) infinite;
}
.classify-fragments {
  display: flex;
  gap: 4px;
  position: absolute;
  left: 13px;
  top: calc(50% - 2px);
  pointer-events: none;
  animation: classify-resolve 6s ease-in-out var(--phase) infinite;
}
.classify-fragments b { width: 12px; height: 4px; background: #989891; border-radius: 1px; }
.classify-fragments b:nth-child(2) { width: 17px; opacity: .7; }
.classify-fragments b:nth-child(3) { width: 9px; opacity: .45; }
@keyframes classify-resolve {
  0%, 10% { opacity: .75; transform: scaleX(1); transform-origin: left; }
  30%, 86% { opacity: 0; transform: scaleX(.6); transform-origin: left; }
  100% { opacity: .75; transform: scaleX(1); transform-origin: left; }
}
@keyframes classify-reveal {
  0%, 9%, 100% { opacity: 0; }
  31%, 82% { opacity: 1; }
}

/* 3. A broad, soft highlight passes through each fixed field. */
.local-section[data-classify-motion="scan"] .classify-art > span::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 2px;
  background: linear-gradient(100deg, transparent 32%, #e7e7df1c 49%, transparent 66%);
  background-size: 300% 100%;
  pointer-events: none;
  animation: classify-field-scan 6s ease-in-out var(--phase) infinite;
}
.local-section[data-classify-motion="scan"] .classify-art > span::before {
  animation: classify-branch-glow 6s ease-in-out var(--phase) infinite;
}
@keyframes classify-field-scan {
  0% { background-position: 100% 0; opacity: 0; }
  12% { opacity: 1; }
  55% { background-position: 0% 0; opacity: 1; }
  65%, 100% { background-position: 0% 0; opacity: 0; }
}
@keyframes classify-branch-glow {
  0%, 55%, 100% { background-color: #545451; }
  18%, 28% { background-color: #a6a69f; }
}
@media (prefers-reduced-motion: reduce) {
  .local-section[data-classify-motion="resolve"] .classify-fragments,
  .local-section[data-classify-motion="trace"] .classify-art > span::after,
  .local-section[data-classify-motion="scan"] .classify-art > span::after { display: none; }
  .local-section[data-classify-motion="resolve"] .classify-label { opacity: 1; }
}