.f-height50{ 
  height: 50vh!important;
 }

.f-height40{ 
  height: 40vh!important;
 }

.f-height100{ 
  height: 100vh;
 }

.webview{ 
  height: calc(100vh-192px)!important;
  min-height: calc(100vh-192px)!important;
 }