/* Shared material rail for every Design Context category. */

.dcx-nav.dcx-material-rail-host {
  --dcx-rail-text-gap: 18px;
  --dcx-rail-child-indent: 14px;
  --dcx-rail-item-padding-block: 8px;
  --dcx-rail-motion-duration: 520ms;
  --dcx-rail-motion-easing: cubic-bezier(0.4, 0, 0.2, 1);
  --dcx-rail-category-duration: 520ms;
  --dcx-rail-category-easing: cubic-bezier(0.4, 0, 0.2, 1);
  --dcx-rail-branch-duration: 320ms;
  position: relative;
  isolation: isolate;
}

.dcx-material-rail-host .dcx-nav-label,
.dcx-material-rail-host .dcx-nav-list {
  position: relative;
  z-index: 1;
}

.dcx-material-rail-host .dcx-nav-link {
  padding-inline-start: var(--dcx-rail-text-gap);
  border-left-color: color-mix(in oklch, var(--ks-patina) 42%, transparent);
}

.dcx-material-rail-host .dcx-subnav {
  padding: 2px 0 8px var(--dcx-rail-child-indent);
}

@media (min-width: 921px) {
  .dcx-expander[data-dcx-document="true"] .dcx-material-rail-host .dcx-subnav {
    display: grid;
    gap: 2px;
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-4px);
    animation: none;
    transition:
      max-height var(--dcx-rail-category-duration) var(--dcx-rail-category-easing),
      padding-top var(--dcx-rail-category-duration) var(--dcx-rail-category-easing),
      padding-bottom var(--dcx-rail-category-duration) var(--dcx-rail-category-easing),
      opacity 240ms var(--dcx-rail-category-easing),
      transform 360ms var(--dcx-rail-category-easing),
      visibility 0s linear var(--dcx-rail-category-duration);
  }

  .dcx-expander[data-dcx-document="true"] .dcx-material-rail-host li.is-active > .dcx-subnav {
    max-height: var(--dcx-subnav-height, 24rem);
    padding-top: 2px;
    padding-bottom: 8px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition-delay: 0s;
  }

  .dcx-expander[data-dcx-document="true"] .dcx-material-rail-host li.is-active > .dcx-subnav--summary {
    gap: 0;
    padding-top: 4px;
    padding-bottom: 10px;
  }
}

.dcx-material-rail-host .dcx-sub-link {
  padding: var(--dcx-rail-item-padding-block) 0;
  padding-inline-start: var(--dcx-rail-text-gap);
  border: 0;
  border-left: 2px solid color-mix(in oklch, var(--ks-patina) 42%, transparent);
  line-height: 1.45;
  transition:
    color 160ms var(--ks-ease),
    border-color 160ms var(--ks-ease);
}

.dcx-material-rail-host .dcx-sub-link[aria-current="location"] {
  color: var(--accent);
  font-weight: 600;
}

.dcx-material-rail-host .dcx-subnav--summary {
  gap: 0;
  padding-top: 4px;
  padding-bottom: 10px;
}

.dcx-material-rail-host .dcx-subnav--summary .dcx-sub-link {
  color: var(--ks-text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.dcx-material-rail-host .dcx-subnav--summary .dcx-sub-link[aria-current="location"] {
  color: var(--accent);
}

.dcx-material-rail {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.dcx-material-rail__patina-base {
  fill: var(--ks-patina);
}

.dcx-material-rail__gold-base {
  fill: var(--ks-kinpaku);
}

.dcx-material-rail__patina-image {
  opacity: 0.68;
  filter: saturate(1.18) contrast(1.06);
}

.dcx-material-rail__gold-image {
  opacity: 0.7;
  filter: saturate(1.15) contrast(1.08);
}

.dcx-material-rail__track,
.dcx-material-rail__active,
.dcx-material-rail__transition-track,
.dcx-material-rail__transition-active {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.dcx-material-rail__track {
  stroke: var(--ks-patina);
  stroke: url("#dcx-material-rail-patina") var(--ks-patina);
  opacity: 0;
  transition: opacity var(--dcx-rail-category-duration) var(--dcx-rail-category-easing);
}

.dcx-material-rail-host[data-rail-ready] .dcx-material-rail__track {
  opacity: 0.58;
}

.dcx-material-rail__track[data-entering="true"] {
  opacity: 0 !important;
  transition: none !important;
}

.dcx-material-rail__active {
  stroke: var(--accent);
  stroke: url("#dcx-material-rail-gold") var(--accent);
  opacity: 0;
  transition:
    stroke-dasharray var(--dcx-rail-motion-duration) var(--dcx-rail-motion-easing),
    stroke-dashoffset var(--dcx-rail-motion-duration) var(--dcx-rail-motion-easing),
    opacity 180ms ease;
}

.dcx-material-rail__active[data-ready="true"] {
  opacity: 1;
}

.dcx-material-rail__active[data-initial="true"] {
  transition-property: opacity;
}

.dcx-material-rail__active[data-entering="true"] {
  opacity: 0 !important;
  transition: none !important;
}

.dcx-material-rail__transition-track {
  opacity: 0;
  transition: opacity var(--dcx-rail-branch-duration) var(--dcx-rail-category-easing);
}

.dcx-material-rail__transition-active {
  opacity: 0;
}

.dcx-material-rail__transition-track[data-visible="true"] {
  opacity: 0.58;
}

.dcx-material-rail__transition-active[data-visible="true"] {
  opacity: 1;
}

.dcx-material-rail__transition-track[data-initial="true"],
.dcx-material-rail__transition-active[data-initial="true"] {
  transition: none !important;
}

.dcx-material-rail__transition-active {
  transform-box: fill-box;
  transform-origin: center;
  transition:
    transform var(--dcx-rail-category-duration) var(--dcx-rail-category-easing),
    opacity 180ms ease;
}

.dcx-material-rail__track[data-morphing="true"] {
  opacity: 0.58 !important;
  transition: none !important;
}

.dcx-material-rail__transition-active[data-settling="true"] {
  transition:
    transform var(--dcx-rail-branch-duration) var(--dcx-rail-category-easing),
    opacity 180ms ease;
}

.dcx-material-rail__active[data-handoff="true"],
.dcx-material-rail__transition-active[data-handoff="true"] {
  transition: none !important;
}

.dcx-material-rail-host[data-rail-ready] .dcx-nav-link,
.dcx-material-rail-host[data-rail-ready] .dcx-sub-link,
.dcx-material-rail-host[data-rail-ready] .dcx-nav-link:hover,
.dcx-material-rail-host[data-rail-ready] .dcx-nav-link:focus-visible,
.dcx-material-rail-host[data-rail-ready] .dcx-sub-link:hover,
.dcx-material-rail-host[data-rail-ready] .dcx-sub-link:focus-visible {
  border-left-color: transparent;
}

@media (max-width: 920px) {
  .dcx-material-rail {
    display: none;
  }

  .dcx-material-rail-host .dcx-nav-link {
    padding: 8px 10px;
    border-left: 0;
  }

  .dcx-material-rail-host .dcx-subnav {
    display: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dcx-material-rail-host *,
  .dcx-material-rail-host *::before,
  .dcx-material-rail-host *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }
}