jqwidgets-framework/demos/Angular/src/responsivepanel/integrationwithjqxmenu/app.component.css

jQWidgets is an advanced Angular, Vue, Blazor, React, Web Components, jquery, ASP .NET MVC, Custom Elements and HTML5 UI framework.

jqxResponsivePanel > div, jqxPanel > div {
  float: left;
}

jqxMenu > div {
  border: none !important;
}

.jqx-rc-all {
  border-radius: 0px;
}