Меню №21

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" />
<ul class="side-menu">
    <li>
        <a href="#"><span class="fa fa-code"></span>Заголовок</a>
    </li>
    <li>
        <a href="#"><span class="fa fa-cog"></span>Настройки</a>
    </li>
    <li>
        <a href="#"><span class="fa fa-font"></span>Типография</a>
    </li>
    <li>
        <a href="#"><span class="fa fa-caret-square-o-right"></span>Медиа</a>
    </li>
    <li>
        <a href="#"><span class="fa fa-check-square"></span>Формулы</a>
    </li>
    <li>
        <a href="#"><span class="fa fa-square"></span>Карточки</a>
    </li>
    <li>
        <a href="#"><span class="fa fa-bars"></span>Меню</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;
    -webkit-transition: width 0.3s;
    -o-transition: width 0.3s;
    -moz-transition: width 0.3s;
    transition: width 0.3s;
}

.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: 0.9rem;
    text-decoration: none;
    color: #fff;
    height: 60px;
}

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