/* Scroll choreography decorates the existing layout; no pinning or scroll locks. */
.hackathon-page .hero h1 .motion-word { transform-origin: left bottom; }
.hackathon-page main > section[id] { scroll-margin-top: 90px; }
.gsap-motion .timeline { position: relative; }
.gsap-motion .timeline::before,
.gsap-motion .timeline::after {
  content: "";
  position: absolute;
  left: 45px;
  top: 20px;
  bottom: 20px;
  width: 1px;
  pointer-events: none;
  background: var(--line);
}
.gsap-motion .timeline::after {
  background: linear-gradient(var(--cyan), var(--acid));
  transform-origin: top;
  transform: scaleY(var(--sequence-progress, 0));
}
.gsap-motion .timeline > li > span {
  align-self: start;
  position: relative;
  z-index: 1;
  width: 92px;
  text-align: center;
  padding-block: 4px;
  background: var(--panel);
  transition: color .25s ease;
}
.gsap-motion .timeline > li.is-current > span { color: var(--acid); }
.gsap-motion .timeline > li.is-current h3 { color: var(--acid); }
.gsap-motion .timeline h3 { transition: color .25s ease; }
.gsap-motion .track-grid article { position: relative; overflow: hidden; }
.gsap-motion .track-grid article::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--acid), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s ease;
}
@media (hover: hover) and (pointer: fine) {
  .gsap-motion .track-grid article:hover::after { transform: scaleX(1); }
  .gsap-motion .track-grid article:hover .track-motif { opacity: .8; transform: rotate(-8deg); }
}
.hackathon-page[data-motion-mode="mobile"] .timeline::before,
.hackathon-page[data-motion-mode="mobile"] .timeline::after { display: none; }
.hackathon-page[data-motion-mode="mobile"] .timeline > li > span { width: auto; text-align: left; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hackathon-page *, .hackathon-page *::before, .hackathon-page *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* The project assembles beside the existing sequence, without pinning the page. */
.sequence-workbench { display: grid; grid-template-columns: minmax(0,1.2fr) minmax(0,1fr); gap: clamp(30px,5vw,80px); align-items: start; }
.sequence-workbench .timeline { margin: 0; }
.sequence-workbench .timeline li { grid-template-columns: 74px minmax(0,1fr); gap: 16px; min-height: 158px; align-content: center; }
.sequence-workbench .timeline > li > span { width: 74px; }
.gsap-motion .sequence-workbench .timeline::before, .gsap-motion .sequence-workbench .timeline::after { left: 36px; }
.project-assembly { position: sticky; top: 120px; margin: 0; border: 1px solid #435547; background: #101b16; box-shadow: 10px 10px 0 #090e0b; }
.assembly-heading { display: flex; justify-content: space-between; gap: 10px; padding: 19px; border-bottom: 1px solid #344638; color: var(--cyan); font: 500 .64rem 'IBM Plex Mono',monospace; letter-spacing: .06em; }
.assembly-step { color: #8f9f91; }
.assembly-screen { display: block; width: 100%; height: auto; }
.assembly-sketch { fill: none; stroke: #829d88; stroke-width: 1.4; stroke-dasharray: 5 4; transition: opacity .4s; }
.assembly-connections { fill: #143a30; stroke: var(--cyan); stroke-width: 2; opacity: 0; transition: opacity .4s; }
.assembly-components, .assembly-finished { opacity: 0; transform: translateY(7px); transition: opacity .45s,transform .45s; }
.assembly-pencil { transition: opacity .3s; }
.project-assembly[data-stage="1"] .assembly-connections { opacity: 1; }
.project-assembly[data-stage="1"] .assembly-sketch { opacity: .24; }
.project-assembly:is([data-stage="2"],[data-stage="3"]) .assembly-components { opacity: 1; transform: none; }
.project-assembly:is([data-stage="2"],[data-stage="3"]) .assembly-sketch { stroke-dasharray: none; opacity: 1; }
.project-assembly[data-stage="3"] .assembly-finished { opacity: 1; transform: none; }
.project-assembly:not([data-stage="0"]) .assembly-pencil { opacity: 0; }
.assembly-status { display: flex; justify-content: space-between; align-items: center; padding: 0 20px 19px; color: #eaf3df; font: 500 .8rem 'Space Grotesk',sans-serif; }
.assembly-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--acid); box-shadow: 0 0 12px #d8ff3733; }
.assembly-controls { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); border-block: 1px solid #344638; }
.assembly-controls button { display: flex; flex-direction: column; gap: 7px; align-items: start; min-height: 62px; padding: 12px; border: 0; border-right: 1px solid #344638; color: #9fab9d; background: transparent; font: 500 .6rem 'IBM Plex Mono',monospace; cursor: pointer; }
.assembly-controls button:last-child { border-right: 0; }
.assembly-controls button span { color: #ecf2e4; font-size: .66rem; }
.assembly-controls button[aria-pressed=true] { background: #263c22; color: var(--acid); box-shadow: inset 0 -2px var(--acid); }
.assembly-controls button:focus-visible { outline: 2px solid var(--cyan); outline-offset: -4px; }
.project-assembly figcaption { padding: 14px 19px; font-size: .67rem; color: #a4b29f; }
.sequence-workbench .timeline > li.assembly-current h3 { color: var(--acid); }
.project-assembly:not(.assembly-ready) .assembly-controls { display: none; }
.project-assembly:not(.assembly-ready) figcaption { display: none; }
@media (max-width: 900px) {
  .sequence-workbench { grid-template-columns: 1fr; gap: 38px; }
  .project-assembly { position: relative; top: auto; order: -1; max-width: 470px; width: 100%; }
  .sequence-workbench .timeline li { grid-template-columns: 40px minmax(0,1fr); min-height: 135px; }
  .sequence-workbench .timeline > li > span { width: 40px; }
}
@media (prefers-reduced-motion: reduce) { .project-assembly * { transition: none !important; } }
.sequence-workbench .timeline > li.assembly-current > span { color: var(--acid); }