.menu-icon-performance{
    display: inline-block;
    width: 16px;
    height: 16px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}
.menu-icon-performance {
    background-image: url('images/menu/performance.svg');
}
.menu-icon-performance:hover {
    background-image: url('images/menu/performance-hover.svg');
}