media_directories_ui.browser.css in Media Directories 3.x

.media-directories-library-tree {
  width: calc(25% - 1px);
  position: absolute;
  top: 0;
  bottom: 0;
  border-right: 1px solid #ccc;
  background: #fcfcfa;
}

.vakata-context {
  z-index: 1260;
}

.browser {
  display: flex;
  flex-wrap: wrap;
  box-sizing: border-box;
  height: 100%;
  width: 100%;

  -webkit-touch-callout: none; /* iOS Safari */
  -webkit-user-select: none; /* Safari */
  -khtml-user-select: none; /* Konqueror HTML */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* Internet Explorer/Edge */
  user-select: none;
}

.browser > div {
  box-sizing: border-box;
}

.browser .form-actions {
  margin: 0 1em;
}

.browser--header {
  width: 100%;
  background: #e1e2dc;
  border-bottom: 1px solid #ccc;
  align-self: self-start;
}

.browser--body {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  align-self: stretch;
  width: 100%;
}

.browser--listing {
  width: 100%;
  flex-grow: 1;
  padding: 1em;
}

.browser--listing .form-actions {
  display: none;
}

.browser-toolbar {
  display: flex;
  justify-content: space-between;
  margin: 0 0.75em;
}

.browser-toolbar__items {
  display: flex;
}

.browser-toolbar__item {
  margin-right: 1em;
  margin-bottom: 0.75em;
  margin-top: 0.75em;
  display: flex;
  align-items: center;
}

.media-browser--full .browser {
  height: 67vh;
}

.jstree-wholerow-ul {
  width: 100%;
}

.js-form-item-directory {
  display: none;
}