.CodeMirror { 
        border: none !Important;
        font-size: 15px !Important;
    }
 .CodeMirror-gutter{background: none !Important; border: none; padding-right: 5px;}
 
 span.cm-at{background: yellow !Important;}
 textarea.codepress{display: block; width: 100% !Important; font-size: 14px;}