.wa__btn_popup {
    position: fixed;
    right: 30px;
    bottom: 30px;
    cursor: pointer;
    font-family: Arial,Helvetica,sans-serif;
    z-index: 999;
}

.wa__btn_popup .wa__btn_popup_icon {
    background: #2db742;
}
.wa__btn_popup .wa__btn_popup_icon {
    width: 56px;
    height: 56px;
    background: #2db742;
    border-radius: 50%;
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    box-shadow: 0 6px 8px 2px rgba(0,0,0,.14);
    -webkit-box-shadow: 0 6px 8px 2px rgba(0,0,0,.14);
    -moz-box-shadow: 0 6px 8px 2px rgba(0,0,0,.14);
}

.wa__btn_popup .wa__btn_popup_icon:before {
    content: '';
    position: absolute;
    z-index: 1;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background: transparent url(../img/whatsapp_logo.svg) center center no-repeat;
    background-size: 30px auto;
    -webkit-background-size: 30px auto;
    -moz-background-size: 30px auto;
    transition: .4s ease all;
    -webkit-transition: .4s ease all;
    -moz-transition: .4s ease all;
}

.wa__btn_popup .wa__btn_popup_icon:after {
    content: '';
    opacity: 0;
    position: absolute;
    z-index: 2;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background: transparent url(../img/x_icon.svg) center center no-repeat;
    background-size: 14px auto;
    -webkit-background-size: 14px auto;
    -moz-background-size: 14px auto;
    transition: .4s ease all;
    -webkit-transition: .4s ease all;
    -moz-transition: .4s ease all;
    -ms-transform: scale(0) rotate(-360deg);
    transform: scale(0) rotate(-360deg);
    -webkit-transform: scale(0) rotate(-360deg);
    -moz-transform: scale(0) rotate(-360deg);
}