JSFiddle - React, Tailwind, and code Playground

CSS

body 
{ 
    font-family: "Crimson Text";
    background-color: #F2FFFC;
    line-height: 1.5;
}

body div
{
    padding-top: 30px;
    padding-bottom: 30px;
}

strong
{
    font-weight: bold;
}

em
{
    font-style: italic;
}

h1{
    text-transform: uppercase;
}

h2
{
    font-size: 30px;
    clear: both;
}

h1,
h2
{
    font-family: "Open Sans Condensed", sans-serif;
}

.conteudo h1
{
    font-size: 60px;
    color: #FFFFFF;
    background-color: #851944;
    text-align: center;
    padding: 25px;
    border-bottom: 10px solid #000;
}

.conteudo div
{
    width: 720px;
    margin-left: auto;
    margin-right: auto;
}

p
{
    text-align: justify;
    margin-bottom: 20px;
    margin-top: 20px;
}

.recomendacao,
.navegacao,
footer
{
    padding: 20px;
}

.rodape-pagina
{
    background-color: #000;
    color: #F2FFFC;
}

main a
{
    color: #851944;
}

.navegacao
{
    background-color: #3C1D3D;
    color: #F2FFFC;
    text-align: center;
}

.navegacao h1
{
    font-size: 16px;
    margin-bottom: 25px;
}

.navegacao a
{
    color: inherit;
    font-family: "Open Sans Condensed", sans-serif;
}

.links-sociais li{
    display: inline-block;
}

.links-sociais a{
    width: 40px;
    height: 40px;
    display: block;
    text-indent: -100000px;
}

.github{
    background-image: url(../images/github.png);
}

.twitter{
    background-image: url(../images/twitter.png);
}

.linkedin{
    background-image: url(../images/linkedin.png);
}

main{
    width: 80%;
    float: left;
    padding-bottom: 80px;
}

.minha-foto,
.navegacao{
    float: right;
    border-left: 10px solid black;
    border-bottom: 10px solid black;
    box-sizing: border-box;
}

.navegacao{
    clear: right;
    width: 20%;
    position: relative;
    top: 310px;
}

.minha-foto{
    position: absolute;
    top: 0;
    right: 0;
}

footer{
    clear: both;
    position: fixed;
    bottom: 0;
    width: 100%;
}

/*
Botão de pausa
body div div
{
    border-left: 10px solid red;
    border-right: 10px...

JavaScript

c