/* ---------- Motion layer ---------- */

html {
  --motion-xs: 160ms;
  --motion-s: 240ms;
  --motion-m: 400ms;
  --motion-l: 700ms;
  --motion-xl: 1200ms;
  --motion-ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --motion-emphasis: cubic-bezier(0.16, 1, 0.3, 1);
}

main {
  position: relative;
  z-index: 2;
}

.motion-stage,
.motion-labels {
  display: none;
}

.motion-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.motion-stage canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.motion-labels {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

html.motion-full .motion-stage,
html.motion-full .motion-labels {
  display: block;
}

.motion-label {
  position: absolute;
  transform: translate(-50%, -50%);
  padding: 2px 4px;
  border: 1px solid var(--hairline-strong);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 8px;
  line-height: 1.25;
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity var(--motion-m) var(--motion-ease);
}

.motion-label.is-visible {
  opacity: 1;
}

.motion-label--dim {
  color: var(--ink-70);
}

.motion-label--copper {
  border-color: var(--copper);
  color: var(--copper-text);
}

.motion-label--approved {
  border-color: var(--approved);
  color: var(--approved);
}

/* Hero: the static SVG is the poster and the T0–T2 fallback. T3 replaces its
   linework with the stage while keeping the panel frame, top line and caption. */

html.motion-full .drawing-panel {
  background: transparent;
}

html.motion-full .drawing-panel .sld {
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--motion-l) var(--motion-ease);
}

html.motion-css .hero-grid {
  perspective: 1200px;
}

html.motion-css .drawing-panel {
  transform-style: preserve-3d;
  will-change: transform;
}

/* Process stage. T3 pins the drawn cable run with CSS sticky; there is no
   ScrollTrigger pin and no scroll hijack. */

.process-visual {
  display: none;
}

html.motion-css .process-visual,
html.motion-full .process-visual {
  display: flex;
  flex-direction: column;
  position: relative;
  height: clamp(180px, 26vh, 280px);
  border: 1px solid var(--hairline-strong);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  overflow: hidden;
}

html.motion-full .process-visual {
  background: transparent;
}

.process-visual__head,
.process-visual__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 8px;
  color: var(--ink-70);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.process-visual__head {
  border-bottom: 1px solid var(--hairline);
}

.process-visual__foot {
  border-top: 1px solid var(--hairline);
}

.process-visual__head [data-process-counter] {
  color: var(--copper-text);
}

.process-fallback {
  display: block;
  width: 100%;
  height: 100%;
  flex: 1 1 auto;
  min-height: 0;
}

html.motion-full .process-fallback {
  display: none;
}

.process-fallback__rule {
  stroke: var(--hairline-strong);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.process-fallback__cable {
  fill: none;
  stroke: var(--copper);
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}

.process-fallback__nodes path {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.process-fallback__nodes path.is-live {
  fill: var(--copper);
  stroke: var(--copper);
}

.process-fallback__nodes path.is-done {
  fill: var(--approved);
  stroke: var(--approved);
}

.process-skip {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 3px 6px;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  cursor: pointer;
}

html.motion-full .process-skip {
  display: inline-flex;
}

.process-skip:hover,
.process-skip:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

html.motion-full #process {
  min-height: 460vh;
  padding-bottom: 0;
}

html.motion-full #process .process-pin {
  position: sticky;
  top: 0;
  min-height: 100svh;
  display: flex;
  align-items: center;
}

html.motion-full #process .process-shell {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(12px, 2vh, 22px);
  padding-top: calc(64px + 3vh);
  padding-bottom: 3vh;
}

html.motion-full #process .process {
  flex: 0 0 auto;
}

html.motion-full #process .step {
  transition: opacity var(--motion-m) var(--motion-ease);
}

html.motion-full #process .step:not(.is-live) {
  opacity: 0.62;
}

html.motion-full #process .step.is-live {
  opacity: 1;
}

html.motion-full #process .step:not(.is-live)::before {
  background: var(--paper);
  border-color: var(--ink);
}

html.motion-full #process .step.is-live::before {
  background: var(--copper);
  border-color: var(--copper);
}

/* Visible pause control for the only auto-playing motion. */

.motion-toggle {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 35;
  padding: 7px 10px;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0.9;
}

.motion-toggle:hover,
.motion-toggle:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.motion-toggle[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
}

html.motion-off .process-visual,
html.motion-off .motion-stage,
html.motion-off .motion-labels {
  display: none !important;
}

@media (max-width: 860px) {
  html.motion-full #process {
    min-height: 0;
    padding-bottom: var(--space-8);
  }

  html.motion-full #process .process-pin {
    position: static;
    min-height: 0;
  }

  html.motion-full #process .process-shell {
    padding-top: 0;
    padding-bottom: 0;
  }

  html.motion-full #process .process-fallback {
    display: block;
  }

  html.motion-full .process-visual {
    background: var(--paper);
  }
}

@media (prefers-reduced-motion: reduce) {
  .motion-stage,
  .motion-labels {
    display: none !important;
  }

  .motion-label {
    transition: none;
  }

  .motion-toggle {
    display: none;
  }
}

@media print {
  .motion-stage,
  .motion-labels,
  .motion-toggle,
  .process-visual {
    display: none !important;
  }

  html.motion-full .drawing-panel {
    background: var(--paper);
  }

  html.motion-full .drawing-panel .sld {
    opacity: 1;
    visibility: visible;
  }
}