#mobileMessage {
    display: none;
    position: fixed;
    top: 110px;
    left: 50%;
    transform: translateX(-50%);
    padding: 15px;
    border-radius: 20px;
    background-color: rgba(0, 0, 0, 0.7);
    color: #fff;
    font-size: 16px;
    z-index: 9999999;
    max-width: 80%;
    text-align: center;
    animation: fadein 2.5s;
    width: 80%;
}

@keyframes fadein {
    from { top: 0; opacity: 0; }
    to   { top: 110px; opacity: 1; }
}