/* Repères de lecture : les titres se révèlent au survol ou au clavier. */
.course-outline {
  position: fixed;
  top: 50%;
  right: max(18px, calc((100vw - 1160px) / 2));
  transform: translateY(-50%);
  z-index: 45;
  width: 36px;
  max-height: min(65vh, 540px);
  padding: 10px 8px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 11px;
  background: transparent;
  transition: width 220ms cubic-bezier(.2,.8,.2,1), background 180ms, border-color 180ms, box-shadow 180ms;
}
.course-outline[hidden] { display: none; }
.course-outline:hover,
.course-outline:focus-within,
.course-outline.is-open {
  width: 260px;
  background: #1b1b1df5;
  border-color: #343238;
  box-shadow: 0 12px 35px #0004;
}
.course-outline-title {
  max-height: 0;
  margin: 0;
  padding-left: 8px;
  overflow: hidden;
  opacity: 0;
  color: #8c8793;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 1.3px;
  white-space: nowrap;
  transition: opacity 150ms, max-height 200ms, margin 200ms;
}
.course-outline:hover .course-outline-title,
.course-outline:focus-within .course-outline-title,
.course-outline.is-open .course-outline-title {
  max-height: 20px;
  margin-bottom: 8px;
  opacity: 1;
}
.course-outline-list {
  max-height: calc(min(65vh, 540px) - 50px);
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: #46414b transparent;
  overscroll-behavior: contain;
}
.course-outline-item {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 15px;
  width: 100%;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: #a49da9;
  cursor: pointer;
  text-align: left;
}
.course-outline-item:hover { background: #ffffff06; color: #eee8f2; }
.course-outline-item:focus-visible { outline: 1px solid #b7a2d0; outline-offset: -1px; }
.course-outline-label {
  flex: 1;
  min-width: 0;
  padding-left: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(8px);
  font-family: inherit;
  font-size: 11px;
  transition: opacity 140ms, transform 200ms;
}
.course-outline:hover .course-outline-label,
.course-outline:focus-within .course-outline-label,
.course-outline.is-open .course-outline-label { opacity: 1; transform: translateX(0); transition-delay: 60ms; }
.course-outline-bar {
  width: 18px;
  height: 3px;
  flex-shrink: 0;
  border-radius: 2px;
  background: #82798e;
  transition: background 180ms, width 180ms;
}
.course-outline-item[data-level="3"] .course-outline-bar { width: 12px; }
.course-outline-item[data-level="4"] .course-outline-bar { width: 8px; }
.course-outline-item[data-level="3"] .course-outline-label { padding-left: 17px; }
.course-outline-item[data-level="4"] .course-outline-label { padding-left: 26px; }
.course-outline-item[aria-current="location"] { color: #dfcfee; }
.course-outline-item[aria-current="location"] .course-outline-bar { background: #baa3d6; }
.course-outline-item:hover .course-outline-bar { background: #d0bcdf; }
.outline-target { scroll-margin-top: 100px; }
@media (max-width: 900px) {
  .course-outline { right: 8px; width: 32px; max-height: 45vh; padding-inline: 6px; }
  .course-outline-list { max-height: calc(45vh - 50px); }
  .page-wrapper { padding-right: 48px; }
}
@media (prefers-reduced-motion: reduce) {
  .course-outline, .course-outline * { transition: none !important; }
}