.demo_service_float_buttons {
    display: flex;
    flex-direction: column;
    position: fixed;
    right: 0;
    top: 30%;
    z-index: calc(9e999);
}

.demo_service_float_buttons a {
    background: #fff;
    border: 1px solid #e8e8e8;
    transition: all .15s ease;
    color: #000;
    font-size: 14px;
    padding: 5px 13px;
    font-weight: normal;
    margin: 2px 0;
    font-family: serif;
}

.demo_service_float_buttons a:hover {
    color: #4db2ec;
    border-color: rgba(77, 178, 236, .3);
}