com.phloxui/styles/lib/component/editor/DefaultEntryEditorPopover.less

PhloxUI Ng2+ Framework

.phx-default-entry-editor-popover{
  width: 100%;
  height: 100%;

  .material-text-box {
    width: 100%;
    .form-control {
      // custom text box here
    }
  }
}