.case-nav nav a,
.case-header nav a {
  position: relative;
}

.case-nav nav a::after,
.case-header nav a::after {
  position: absolute;
  right: 0;
  bottom: -0.55rem;
  left: 0;
  height: 1px;
  content: "";
  background: currentColor;
  opacity: 0;
  transform: scaleX(0.35);
  transition: opacity var(--motion-fast), transform var(--motion-fast);
}

.case-nav nav a[aria-current="location"],
.case-header nav a[aria-current="location"] {
  color: var(--route-accent, var(--proof-technical));
}

.case-nav nav a[aria-current="location"]::after,
.case-header nav a[aria-current="location"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.case-directory {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  padding: var(--space-6) var(--page-pad);
  border-bottom: 1px solid var(--line);
}

.case-directory__header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-4);
  align-items: end;
  margin-bottom: var(--space-4);
}

.case-directory__eyebrow,
.case-directory__sequence,
.case-directory__index,
.case-directory__category {
  font-family: var(--font-mono);
  font-size: var(--type-tiny);
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.case-directory__eyebrow {
  margin: 0 0 var(--space-1);
  color: var(--route-accent, var(--proof-technical));
}

.case-directory h2 {
  margin: 0;
  font-size: clamp(1.65rem, 2.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 1;
}

.case-directory__sequence {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.case-directory__sequence a {
  padding-bottom: var(--space-1);
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.case-directory__sequence a:hover {
  color: var(--route-accent, var(--proof-technical));
  border-color: currentColor;
}

.case-directory__list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.case-directory__item {
  min-width: 0;
  border-bottom: 1px solid var(--line);
}

.case-directory__item:nth-child(3n + 2),
.case-directory__item:nth-child(3n + 3) {
  border-left: 1px solid var(--line);
}

.case-directory__link,
.case-directory__current {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--space-2);
  min-height: 5.25rem;
  padding: var(--space-3);
  align-content: center;
  text-decoration: none;
}

.case-directory__link:hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--route-accent, var(--proof-technical)) 7%, transparent);
}

.case-directory__current {
  background: color-mix(in srgb, var(--route-accent, var(--proof-technical)) 12%, var(--surface));
}

.case-directory__index {
  grid-row: 1 / span 2;
  color: var(--route-accent, var(--proof-technical));
}

.case-directory__label {
  overflow-wrap: anywhere;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.05;
}

.case-directory__category {
  margin-top: var(--space-1);
  color: var(--ink-soft);
  font-size: 0.625rem;
}

@media (max-width: 54rem) {
  .case-directory__header {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .case-directory__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-directory__item:nth-child(3n + 2),
  .case-directory__item:nth-child(3n + 3) {
    border-left: 0;
  }

  .case-directory__item:nth-child(even) {
    border-left: 1px solid var(--line);
  }
}

@media (max-width: 38rem) {
  .case-directory {
    padding-top: var(--space-5);
    padding-bottom: var(--space-5);
  }

  .case-directory__sequence {
    justify-content: space-between;
  }

  .case-directory__list {
    grid-template-columns: 1fr;
  }

  .case-directory__item:nth-child(even) {
    border-left: 0;
  }

  .case-directory__link,
  .case-directory__current {
    min-height: 4.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .case-nav nav a::after,
  .case-header nav a::after {
    transition: none;
  }
}