html,body{margin:0;padding:0}#app{width:100vw;height:100vh;display:flex}#left,#right{flex:1 1 50%;height:100vh}.cm-mzn-underline-error{position:relative;display:inline-block}.cm-mzn-underline-error,.cm-mzn-underline-error:before,.cm-mzn-underline-error:after{border-color:red}.cm-mzn-underline-error:before,.cm-mzn-underline-error:after{content:"";border-bottom-width:2px;border-bottom-style:dotted;position:absolute;display:block;pointer-events:none}.cm-mzn-underline-error:before{left:2px;right:0;bottom:2px}.cm-mzn-underline-error:after{left:0;right:2px;bottom:0}