.prt-cz-fl-btn-wrapper {
    position: fixed;
    left: 20px;
    bottom: 100px;
    z-index: 999;
    cursor: pointer;
}

.prt-cz-fl-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #222529;
    box-shadow: 0 5px 10px 0 rgba(0,0,0, .5);
    transform: translateY(0);
    transition: transform .3s;
}

.prt-cz-fl-btn::before {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    display: block;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background-color: #0af;
    z-index: 1;
}

.prt-cz-fl-btn-wrapper:not(:hover) .prt-cz-fl-btn::before {
    animation: prt-cz-zoom 1s infinite;
}

@keyframes prt-cz-zoom {
    0% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-2px);
    }

    100% {
        transform: translateY(0);
    }
}

.prt-cz-fl-btn:hover {
    transform: translateY(-5px);
}

.prt-cz-fl-btn-desc {
    padding: 15px;
    position: absolute;
    top: -9999px;
    left: calc(100% - 10px);
    font-size: 14px;
    line-height: 1.4;
    text-align: left;
    background-color: #444;
    color: #fff;
    border-radius: 10px;
    opacity: 0;
    visibility: hidden;
    transform: translate(-10px, -100%);
    transition: opacity .4s, transform .4s;
    min-width: 270px;
}

.prt-cz-fl-btn-desc:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    display: block;
    width: 20px;
    height: 20px;
    border-top: 20px solid #444;
    border-right: 20px solid transparent;
}

.prt-cz-fl-btn-wrapper span {
    display: block;
    margin-top: 5px;
    font-size: 12px;
}

.prt-cz-fl-btn-wrapper:hover .prt-cz-fl-btn-desc {
    visibility: visible;
    transform: translate(0, -100%);
    top: -20px;
    opacity: 1;
}