.arcar-chat-button {
    position: fixed;
    right: 24px;
    bottom: 24px;

    width: 58px;
    height: 58px;

    border-radius: 50%;

    background: #16a34a;
    color: #fff;

    text-decoration: none;

    display: flex;
    align-items: center;
    justify-content: center;

    font-size: 25px;

    box-shadow: 0 10px 30px rgba(0,0,0,.18);

    z-index: 10000;

    transition:
        transform .2s ease,
        box-shadow .2s ease;
}

.arcar-chat-button:hover {
    transform: translateY(-2px);

    box-shadow:
        0 14px 35px rgba(0,0,0,.22);
}

@media (max-width: 600px) {

    .arcar-chat-button {
        right: 16px;
        bottom: 16px;
    }
}