.zapfloat {
    position: fixed;
    width: 50px;
    height: 50px;
    bottom: 90px;
    right: 40px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 50px;
    -webkit-box-shadow: 7px 7px 24px 1px rgba(0, 0, 0, 0.25);
    -moz-box-shadow: 7px 7px 24px 1px rgba(0, 0, 0, 0.25);
    box-shadow: 6px 6px 24px 1px rgba(0, 0, 0, 0.25);
    z-index: 1010;
}

.img-zap-float {
    margin-top: 4px;
    color: white;
}

@media (min-width: 320px) and (max-width: 640px) {

    .zapfloat {
        right: 26px;
        bottom: 26px;
    }
}