html,body{width:100%;height:100%;margin:0;padding:0;box-sizing:border-box}.full-viewport{width:100vw;height:100vh;min-height:100vh;margin:0;padding:0;overflow:hidden;display:flex;flex-direction:column}.iframe-container{flex:1 1 auto;width:100%;height:100%}iframe{width:100%;height:100%;border:none;display:block}