body
{
    min-height: 100%;
    text-align: center;
    font-family: 'Work Sans', sans-serif;
    font-size: 1em;
}

/* centre le contenu */
body > div
{
    margin-top: 45vh;
    transform: translateY(-50%);
}

img
{
    width: 20%;
    height: auto;
}

@media only screen and (-webkit-min-device-pixel-ratio: 1.5),
 only screen and (-o-min-device-pixel-ratio: 3/2),
 only screen and (min--moz-device-pixel-ratio: 1.5),
 only screen and (min-device-pixel-ratio: 1.5)
{
    img
    {
        width: 25%;
        height: auto;
    }
}