.crista-whatsapp {
    position: fixed;
    right: 22px;
    bottom: calc(22px + env(safe-area-inset-bottom, 0px));

    width: 50px;
    height: 50px;

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

    padding: 0;
    margin: 0;

    border: 2px solid #fff;
    border-radius: 50%;

    background: #25D366 !important;
    color: #fff !important;

    box-sizing: border-box;
    text-decoration: none !important;
    line-height: 0;

    box-shadow:
        0 4px 12px rgba(0, 0, 0, .20),
        0 1px 3px rgba(0, 0, 0, .12);

    z-index: 99999;

    transition:
        transform .18s ease,
        box-shadow .18s ease;
}

.crista-whatsapp svg {
    display: block;
    width: 25px;
    height: 25px;
    flex: 0 0 25px;
    color: #fff !important;
    fill: #fff !important;
}

.crista-whatsapp svg path {
    fill: #fff !important;
}

.crista-whatsapp:hover {
    background: #25D366 !important;
    color: #fff !important;
    transform: translateY(-2px) scale(1.04);
    box-shadow:
        0 7px 18px rgba(0, 0, 0, .24),
        0 2px 5px rgba(0, 0, 0, .14);
}

.crista-whatsapp:visited,
.crista-whatsapp:focus,
.crista-whatsapp:active {
    color: #fff !important;
    text-decoration: none !important;
}

@media (max-width: 768px) {
    .crista-whatsapp {
        right: 16px;
        bottom: calc(16px + env(safe-area-inset-bottom, 0px));
        width: 46px;
        height: 46px;
    }

    .crista-whatsapp svg {
        width: 23px;
        height: 23px;
        flex-basis: 24px;
    }
}