h1.menu-title::before {
    content: "";
    display: inline-block;
    background: url("images/icon.png") no-repeat;
    background-size: 100% 100%;
    width: 1.2em;
    height: 1.2em;
    position: relative;
    top: 0.2em;
    left: -0.2em;
}

.sidebar {
    font-size: 1em;
}