.panel-resizer {
  position: fixed;
  z-index: 36;
  top: var(--header-height);
  bottom: 0;
  left: calc(var(--panel-width) - 6px);
  width: 12px;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: col-resize;
  touch-action: none;
}

.panel-resizer::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 5px;
  width: 2px;
  background: rgba(213,145,53,.68);
  box-shadow: 0 0 0 1px rgba(255,255,255,.16),0 0 18px rgba(0,0,0,.22);
  transition: width 140ms ease,left 140ms ease,background 140ms ease;
}

.panel-resizer::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 2px;
  width: 8px;
  height: 46px;
  border-top: 2px solid rgba(255,255,255,.78);
  border-bottom: 2px solid rgba(255,255,255,.78);
  transform: translateY(-50%);
}

.panel-resizer:hover::before,
.panel-resizer:focus-visible::before,
.panel-resizer.is-dragging::before { left: 4px; width: 4px; background: #f0ae55; }
.panel-resizer:focus-visible { outline: 3px solid rgba(240,174,85,.32); outline-offset: -3px; }
html.is-resizing-panel, html.is-resizing-panel * { cursor: col-resize !important; user-select: none !important; }

.tour-shell.is-panel-closed ~ .panel-resizer,
.model-shell:not(.is-panel-open) ~ .panel-resizer,
.photo3d-shell:not(.is-panel-open) ~ .panel-resizer { visibility: hidden; opacity: 0; pointer-events: none; }

@media (max-width: 900px) {
  .panel-resizer { display: none; }
}