.logo{
width: 50%;
padding: 14px 0px;
}
@media only screen and (max-width: 480px) {
.logo {
    width: 50%;
    padding: 14px 0px;
}
}

.col-center{
    float: none;
    margin: 0 auto;
}

.cresta-whatsapp-chat-box {
    width: 60px;
    height: 60px;
    display: block;
    position: fixed;
    bottom: 15px;
    right: 15px;
    cursor: pointer;
    text-align: center;
    line-height: 60px;
    background: #25d366;
    border-radius: 100%;
    box-shadow: 1px 1px 4px 0 rgba(0, 0, 0, .3);
    z-index: 10;
}