.desktop-sidebar-rail {
  display: none;
  position: relative;
  flex: 0 0 64px;
  width: 64px;
  height: 100%;
}

@media (min-width: 1280px) {
  .desktop-sidebar-rail { display: block; }
}

.desktop-sidebar-panel {
  position: absolute;
  inset: 0 auto 0 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  width: 64px;
  overflow-x: hidden;
  background: #fff;
  border-right: 1px solid #eef0f3;
  box-shadow: 2px 0 8px rgb(15 23 42 / 3%);
  transition: width 180ms ease-out, box-shadow 180ms ease-out;
}

.desktop-sidebar-panel[data-expanded='true'] {
  width: 256px;
  box-shadow: 12px 0 28px -8px rgb(15 23 42 / 18%);
}

.desktop-sidebar-panel button:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: -2px;
}

@media (prefers-reduced-motion: reduce) {
  .desktop-sidebar-panel { transition: none; }
}