jupyterlab/packages/docregistry/style/index.css

/*-----------------------------------------------------------------------------
| Copyright (c) Jupyter Development Team.
| Distributed under the terms of the Modified BSD License.
|----------------------------------------------------------------------------*/

.jp-MimeRenderer {
  border-top: var(--jp-border-width) solid var(--jp-border-color2);
  outline: none;
  overflow: hidden;
  margin-top: -1px;
  display: flex;
  flex-direction: column;
}


.jp-MimeRenderer .jp-Toolbar {
    display: block;
    height: var(--jp-toolbar-micro-height);
    background: var(--jp-toolbar-background);
    border-bottom: 1px solid var(--jp-toolbar-border-color);
    box-shadow: var(--jp-toolbar-box-shadow);
    z-index: 1;
}