#portrait-reminder {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(255, 255, 255, 0);
    padding: 20px;
    color: white;
    z-index: 101;
    width: 80%;
}

#portrait-reminder p {
    font-size: 1rem;
}

@media (orientation: portrait) {
    #portrait-reminder {
        display: block;
    }
}