@media only screen and (max-width: 600px)
{
  div.CodeMirror,
  textarea
  {
    width: calc(100vw - 30px)!important;
    max-width: calc(100vw - 30px)!important;
  }
}

div.CodeMirror
{
  width: 100%;
  height: 340px;
  border: 1px solid #1d1d1d;
}

div.CodeMirror-empty
{
  color: #898989!important;
}

div#options
{
  font-size: 0.9em;
}

button#compress
{
  width: 100%;
}