.model-panel-toggle {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--duration-fast) ease, color var(--duration-fast) ease;
}

.model-panel-toggle:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.model-panel-toggle svg {
  width: 14px;
  height: 14px;
}

.model-panel-expand-tab {
  position: absolute;
  left: 0;
  top: 56px;
  z-index: 16;
  width: 20px;
  height: 40px;
  display: none;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--surface-border);
  border-left: 0;
  border-radius: 0 8px 8px 0;
  background: var(--surface-card, var(--surface-base));
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
}

.model-panel-expand-tab:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

#page-main.panel-collapsed .model-panel-expand-tab {
  display: inline-flex;
}

#page-main {
  position: relative;
}