.joinchat__button {
    position: fixed;
    width: 80px;
    height: 80px;
    z-index: 2;
    bottom: 8px;
    right: 8px;
    min-width: var(--s);
    background-image: url(../img/iconmonstr-whatsapp-4-96.png);
    color: inherit;
    border-radius: 100%;
    box-shadow: 1px 6px 24px 0 rgba(7, 94, 84, .24);
    cursor: pointer;
    transition: background-color .2s linear;
    background-size: cover;
}