<ul class="side-menu">
<li><a href="#"><span class="fa fa-code"></span>Superguide</a></li>
<li><a href="#"><span class="fa fa-cog"></span>Instalação e Dependências</a></li>
<li><a href="#"><span class="fa fa-font"></span>Tipografia</a></li>
<li><a href="#"><span class="fa fa-caret-square-o-right"></span>Botões</a></li>
<li><a href="#"><span class="fa fa-check-square"></span>Formulários</a></li>
<li><a href="#"><span class="fa  fa-square"></span>Cards</a></li>
<li><a href="#"><span class="fa fa-bars"></span>Menu</a></li>
</ul>

@import 'https://fonts.googleapis.com/css?family=Roboto';
.side-menu {
  font-family: 'Roboto', sans-serif;
  position: fixed;
  top: 0;
  left: 0;
  margin: 0;
  padding: 0;
  height: 100%;
  width: 60px;
  list-style-type: none;
  background: #f32c52;
  overflow: hidden;
  transition: width .3s;
}

.side-menu:hover {
  width: 300px;
}

.side-menu li {
  width: 300px;
}

.side-menu li span {
  font-size: 1rem;
  margin: 20px 30px 0 22px;
}

.side-menu li a {
  display: block;
  font-size: .9rem;
  text-decoration: none;
  color: #FFF;
  height: 60px;
}

.side-menu li a:hover,
.side-menu li:first-child a {
  background: #14081d;
  display: block;
}