body{font-family:Arial,Helvetica,sans-serif;background-color:#000;color:#fff}h1{font-weight:400}editors{width:100%;display:flex;flex-flow:row nowrap;justify-content:space-evenly;justify-content:space-around}#input,#output{width:100%;height:50vh;border:2px solid #ccc;border-radius:5px;margin:20px;flex-grow:1;flex-shrink:1;overflow:hidden}.error{border-color:red}