.styles-switcher {
    display: block;
    text-align: center;
    background-color: #ddd;
}
.styles-switcher .switcher {
    width: 20px;
    height: 20px;
    display: inline-block;
    margin-right: 5px;
    cursor: pointer;
    opacity: 0.4;
}
.styles-switcher .switcher:hover {
    opacity: 1
}
.styles-switcher .switcher.active {
    opacity: 1;
    border-bottom: 2px solid red;
}