JSFiddle - React, Tailwind, and code Playground

HTML

<div id="content" style="font-family:'Roboto','Arial',sans-serif;font-size:14px;width:200%;"><h1>Ego vero volo in virtute vim esse quam maximam;</h1>

<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. <a href='http://loripsum.net/' target='_blank'>Nihil sane.</a> Qui autem esse poteris, nisi te amor ipse ceperit? Hoc enim identidem dicitis, non intellegere nos quam dicatis voluptatem. <mark>Duo Reges: constructio interrete.</mark> <code>Nemo igitur esse beatus potest.</code> Hoc etsi multimodis reprehendi potest, tamen accipio, quod dant. </p>

<blockquote cite='http://loripsum.net'>
	Nam haec ipsa mihi erunt in promptu, quae modo audivi, nec ante aggrediar, quam te ab istis, quos dicis, instructum videro.
</blockquote>


<h2>Animum autem reliquis rebus ita perfecit, ut corpus;</h2>

<p>An ea, quae per vinitorem antea consequebatur, per se ipsa curabit? <mark>At eum nihili facit;</mark> Nunc de hominis summo bono quaeritur; <i>Ita prorsus, inquam;</i> Duarum enim vitarum nobis erunt instituta capienda. Honesta oratio, Socratica, Platonis etiam. Itaque contra est, ac dicitis; Quod autem satis est, eo quicquid accessit, nimium est; Nihil minus, contraque illa hereditate dives ob eamque rem laetus. </p>

<ol>
	<li>Eodem modo is enim tibi nemo dabit, quod, expetendum sit, id esse laudabile.</li>
	<li>In qua si nihil est praeter rationem, sit in una virtute finis bonorum;</li>
</ol>


<p><mark>Tria genera bonorum;</mark> <mark>Igitur ne dolorem quidem.</mark> Quid de Pythagora? Nihil acciderat ei, quod nollet, nisi quod anulum, quo delectabatur, in mari abiecerat. Maximus dolor, inquit, brevis est. <b>Verum hoc idem saepe faciamus.</b> Quid, quod homines infima fortuna, nulla spe rerum gerendarum, opifices denique delectantur historia? </p>

<dl>
	<dt><dfn>Quid enim?</dfn></dt>
	<dd>Et ille ridens: Video, inquit, quid agas;</dd>
	<dt><dfn>Quid ergo?</dfn></dt>
	<dd>Illum mallem levares, quo optimum atque humanissimum virum, Cn.</dd>
	<dt><dfn>Sed...

CSS

#body{}
::-webkit-scrollbar{width:15px!important;height:15px;border-right:1px solid #C0C0C0!important;}
::-webkit-scrollbar-button{background-color:#F0F0F0!important;width:15px!important;height:17px!important;}
::-webkit-scrollbar-button:hover{background-color:#DADADA!important;}
::-webkit-scrollbar-button:active{background-color:#606060!important;}
::-webkit-scrollbar-track{background-color:#F0F0F0!important;-webkit-border-radius:0px!important;}
::-webkit-scrollbar-thumb{height:5px!important;background-color:#CDCDCD!important;-webkit-border-radius:0px!important;}
::-webkit-scrollbar-thumb:hover{background-color:#A6A6A6!important;}
::-webkit-scrollbar-thumb:active{background-color:#606060!important;}
::-webkit-scrollbar-button:vertical:decrement {background-image:url(http://avm99963.tk/img/scrollbar/top_btn.png)!important;background-position:center!important;}
::-webkit-scrollbar-button:vertical:increment {background-image:url(http://avm99963.tk/img/scrollbar/bottom_btn.png)!important;background-position:center!important;}
::-webkit-scrollbar-button:vertical:increment:active {background-image:url(http://avm99963.tk/img/scrollbar/bottom_btn_white.png)!important;background-position:center!important;}
::-webkit-scrollbar-button:vertical:decrement:active {background-image:url(http://avm99963.tk/img/scrollbar/top_btn_white.png)!important;background-position:center!important;}
::-webkit-scrollbar-button:horizontal:decrement {background-image:url(http://avm99963.tk/img/scrollbar/left_btn.png)!important;background-position:center!important;}
::-webkit-scrollbar-button:horizontal:increment {background-image:url(http://avm99963.tk/img/scrollbar/right_btn.png)!important;background-position:center!important;}
::-webkit-scrollbar-button:horizontal:decrement:active {background-image:url(http://avm99963.tk/img/scrollbar/left_btn_white.png)!important;background-position:center!important;}
::-webkit-scrollbar-button:horizontal:increment:active...