.viber-button {
    position: fixed;
    right: 20px;
    bottom: 100px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    z-index: 9999;
    background-color: #665CAC;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg role='img' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3e%3cpath fill='%23FFF' d='M11.398.002C9.473.028 5.331.344 3.014 2.467 1.294 4.177.693 6.698.623 9.82c-.06 3.11-.13 8.95 5.5 10.541v2.42s-.038.97.602 1.17c.79.25 1.24-.499 1.99-1.299l1.4-1.58c3.85.32 6.8-.419 7.14-.529.78-.25 5.181-.811 5.901-6.652.74-6.031-.36-9.831-2.34-11.551l-.01-.002c-.6-.55-3-2.3-8.37-2.32 0 0-.396-.025-1.038-.016zm.067 1.697c.545-.003.88.02.88.02 4.54.01 6.711 1.38 7.221 1.84 1.67 1.429 2.528 4.856 1.9 9.892-.6 4.88-4.17 5.19-4.83 5.4-.28.09-2.88.73-6.152.52 0 0-2.439 2.941-3.199 3.701-.12.13-.26.17-.35.15-.13-.03-.17-.19-.16-.41l.02-4.019c-4.771-1.32-4.491-6.302-4.441-8.902.06-2.6.55-4.732 2-6.172 1.957-1.77 5.475-2.01 7.11-2.02zm.36 2.6a.299.299 0 0 0-.3.299.3.3 0 0 0 .3.3 5.631 5.631 0 0 1 4.03 1.59c1.09 1.06 1.621 2.48 1.641 4.34a.3.3 0 0 0 .3.3v-.009a.3.3 0 0 0 .3-.3 6.451 6.451 0 0 0-1.81-4.76c-1.19-1.16-2.692-1.76-4.462-1.76zm-3.954.69a.955.955 0 0 0-.615.12h-.012c-.41.24-.788.54-1.148.94-.27.32-.421.639-.461.949a1.24 1.24 0 0 0 .05.541l.02.01a13.722 13.722 0 0 0 1.2 2.6 15.383 15.383 0 0 0 2.32 3.171l.03.04.04.03.03.03.03.03a15.603 15.603 0 0 0 3.18 2.33c1.32.72 2.122 1.06 2.602 1.2v.01c.14.04.268.06.398.06a1.84 1.84 0 0 0 1.102-.472c.39-.35.7-.738.93-1.148v-.01c.23-.43.15-.841-.18-1.121a13.632 13.632 0 0 0-2.15-1.54c-.51-.28-1.03-.11-1.24.17l-.45.569c-.23.28-.65.24-.65.24l-.012.01c-3.12-.8-3.95-3.959-3.95-3.959s-.04-.43.25-.65l.56-.45c.27-.22.46-.74.17-1.25a13.522 13.522 0 0 0-1.54-2.15.843.843 0 0 0-.504-.3zm4.473.89a.3.3 0 0 0 .002.6 3.78 3.78 0 0 1 2.65 1.15 3.5 3.5 0 0 1 .9 2.57.3.3 0 0 0 .3.299l.01.012a.3.3 0 0 0 .3-.301c.03-1.19-.34-2.19-1.07-2.99-.73-.8-1.75-1.25-3.05-1.34a.3.3 0 0 0-.042 0zm.49 1.619a.305.305 0 0 0-.018.611c.99.05 1.47.55 1.53 1.58a.3.3 0 0 0 .3.29h.01a.3.3 0 0 0 .29-.32c-.07-1.34-.8-2.091-2.1-2.161a.305.305 0 0 0-.012 0z'/%3e%3c/svg%3e");
    background-size: 50%; 
    background-repeat: no-repeat;
    background-position: 50% 50%;
}
.viber-button:before,
.viber-button:after {
    content: " ";
    display: block;
    position: absolute;
    border: 1px solid #665CAC;
    left: -20px;
    right: -20px;
    top: -20px;
    bottom: -20px;
    border-radius: 50%;
    animation: border-animate 1.5s linear infinite;
    opacity: 0;
}
.viber-button:after{
    animation-delay: .5s;
}
@keyframes border-animate
{
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: scale(1.2);
        opacity: 0;
    }
}