/* Two rows: common actions, then the selected functional group. */
#topbar {
  height: auto;
  min-height: 100px;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding: 0 16px;
  overflow: visible;
}
.toolbar-header { min-height: 52px; display: flex; align-items: center; gap: 12px; }
.toolbar-tabs { display: flex; align-self: stretch; gap: 4px; margin-left: 8px; }
.toolbar-tab {
  border: 0; border-bottom: 2px solid transparent; padding: 0 12px;
  background: transparent; color: #ffffff90; font: inherit; font-size: 12px;
  cursor: pointer; white-space: nowrap;
}
.toolbar-tab:hover { color: #fff; background: #ffffff08; }
.toolbar-tab[aria-selected="true"] { color: var(--green); border-bottom-color: var(--green); }
.toolbar-tab:focus-visible, #topbar button:focus-visible, #topbar select:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }
.toolbar-quick { margin-left: auto; display: flex; gap: 8px; }
.toolbar-context { display: flex; align-items: stretch; min-height: 48px; border-top: 1px solid #ffffff12; }
.toolbar-selection { display: flex; align-items: center; gap: 10px; padding-right: 14px; margin-right: 14px; border-right: 1px solid #ffffff18; flex-shrink: 0; }
#toolbar-current-tool { color: #ffffff90; font-size: 11px; width: 90px; white-space: nowrap; }
.toolbar-panel { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; overflow-x: auto; padding: 7px 2px; }
.toolbar-panel > * { flex-shrink: 0; }
.toolbar-panel[hidden] { display: none; }
.toolbar-note { font-size: 11px; color: #ffffff70; white-space: nowrap; }
#topbar .toolbar-panel .tb-spacer { flex: 1; }
#topbar #site-library-button { max-width: 180px; overflow: hidden; text-overflow: ellipsis; display: block; }
#topbar #btn-booth { min-width: 155px; }
@media (max-width: 1150px) {
  #topbar { padding: 0 10px; }
  .toolbar-header { flex-wrap: wrap; gap: 8px; padding-top: 10px; }
  .toolbar-tabs { order: 3; width: 100%; margin: 0; height: 40px; overflow-x: auto; }
  .toolbar-tab { flex: 1; padding: 0 10px; }
  #toolbar-current-tool { display: none; }
  .toolbar-selection { padding-right: 8px; margin-right: 8px; }
  #environment-panel { top: 150px; }
}
@media (max-width: 600px) {
  #topbar .logo { display: none; }
  #topbar #site-library-button { max-width: 125px; }
  .toolbar-header { gap: 6px; }
  .toolbar-quick { gap: 4px; }
  #topbar .tb-btn { padding: 0 7px; font-size: 11px; }
  .toolbar-tab { padding: 0 7px; }
  .toolbar-panel { gap: 6px; }
}

.layout-subtabs { display:flex; gap:4px; padding-right:10px; border-right:1px solid #ffffff20; }
.layout-subtabs [aria-selected=true] { color:var(--green); border-color:var(--green); }
.layout-controls, #layout-component-buttons, #layout-component-buttons .env-component-grid { display:flex; gap:8px; align-items:center; flex-shrink:0; }
.layout-controls[hidden] { display:none; }
#layout-component-buttons button { white-space:nowrap; }