.toolbar {
  background: var(--material-toolbar);
  border-bottom: var(--material-border);
  padding: 6px;
  align-items: center;
  justify-content: space-between !important;
}

.toolbar-start,
.toolbar-middle,
.toolbar-end {
  align-items: center;
}

.toolbar-header {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
  overflow: hidden;
  color: var(--fill-secondary);
  text-overflow: ellipsis;
  overflow-wrap: anywhere;
  line-break: anywhere;
  font-size: calc(var(--zotero-font-size) * 1.2);
}

.toolbar-header.content {
  flex-shrink: 0;
}

.toolbar-header.highlight {
  font-size: var(--zotero-font-size);
  padding: 4px;
  border: var(--material-border);
  box-shadow: 0 2px 5px
    color-mix(in srgb, var(--material-background) 15%, transparent);
  border-radius: 4px;
  background: var(--material-background);
  transition: all 0.3s ease;
}
.toolbar-header.highlight:hover {
  box-shadow: 0 5px 15px
    color-mix(in srgb, var(--material-background) 20%, transparent);
  background: var(--color-background50);
}
.toolbar-header.highlight:empty {
  display: none;
}