#mask {
    position: absolute;
    top:0px;
    left:0px;
    width: 100%;
    height: 100%;
    background-color: black;
    opacity: .5;
    z-index: 2;
}

#info {
    position: absolute;
    top: 50%;
    left: 50%;
    width: calc(450px - 2*25px);
    overflow: hidden;
    transform: translate(-50%, -50%);
    background-color: white;
    padding: 25px;
    z-index: 3;
}
#info>p {
    float: left;
    width: 100%;
    font-family: 'robotothin';
    text-align: left;
    font-size: 20px;
    line-height: 24px;
    color:black;
}


/* Règles communes aux petits écrans en portrait OU paysage */
@media (orientation: portrait) and (max-width: 600px),
       (orientation: landscape) and (max-height: 600px) {
    #info {
        width: calc(80% - 2 * 25px);
    }
    #info > p {
        font-size: 14px;
        line-height: 18px;
    }
}

/* Règles spécifiques aux très petits écrans */
@media (orientation: portrait) and (max-width: 500px),
       (orientation: landscape) and (max-height: 400px) {
    #info {
        width: calc(80% - 2 * 25px);
    }
    #info > p {
        font-size: 12px;
        line-height: 16px;
    }
}