.ms-split-pane {
  display: flex;
  height: 100%;
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.ms-split-pane__left {
  flex: 0 0 1000px;
  overflow: auto;
  position: relative;
}

.ms-split-pane__right {
  flex: 1;
  overflow: hidden;
  position: relative;
  background-color: white;
}

.ms-split-pane__divider {
  width: 5px;
  cursor: col-resize;
  background-color: #ccc;
}
.ms-split-pane__open-button {
}

.ms-split-pane .yui-panel-container {
    position: fixed;
}