/* Reading depth shares the case study's paper, ink, mono type and blue rule. */
.reading-control[hidden], .case-summary[hidden], #case-detail[hidden],
.case-section[hidden] { display: none; }
.reading-control {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  position: relative;
  border-bottom: 1px solid var(--rule);
  margin: 8px 0 28px;
}
.reading-control::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 50%;
  height: 2px;
  background: var(--accent);
  transform: translateX(0);
  transition: transform 160ms cubic-bezier(.23, 1, .32, 1);
}
.reading-control[data-mode="full"]::after { transform: translateX(100%); }
.reading-control button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: 500 11px var(--mono);
  letter-spacing: .02em;
  padding: 14px 20px;
  min-height: 44px;
  cursor: pointer;
}
.reading-control button[aria-pressed="true"] { color: var(--ink); }
.reading-control button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}
.reading-control button:active { transform: scale(.98); }
@media (hover: hover) and (pointer: fine) {
  .reading-control button:hover { color: var(--ink); }
}
.reading-control[data-keyboard]::after { transition: none; }
.case-summary { max-width: 780px; }
body[data-reading="short"] .case-nav { visibility: hidden; }
@media (max-width:600px) { .reading-control { margin-bottom:12px; } }
@media (prefers-reduced-motion: reduce) {
  .reading-control::after { transition: none; }
  .reading-control button:active { transform: none; }
}
@media print {
  .reading-control, .case-summary { display: none !important; }
  #case-detail[hidden], .case-section[hidden] { display: block; }
}