.chat {
    position: fixed;
    top: 85%;
    right: 10px;
    width: 68px;
    height: 68px;
    display: block;
    z-index: 1000;
    /*animation: pulse 2s infinite;*/
    cursor: pointer;
}

@keyframes pulse {
    0% {
        -moz-box-shadow: 0 0 0 0 rgba(13, 130, 255, 0.6);
        box-shadow: 0 0 0 0 rgba(13, 130, 255, 0.6);
    }
    70% {
        -moz-box-shadow: 0 0 0 10px rgba(13, 130, 255, 0);
        box-shadow: 0 0 0 20px rgba(13, 130, 255, 0);
    }
    100% {
        -moz-box-shadow: 0 0 0 0 rgba(13, 130, 255, 0);
        box-shadow: 0 0 0 0 rgba(13, 130, 255, 0);
    }
}