body {
    background-image: url(Images/murpierre.png);
    size: 1vh;
    background-repeat: repeat;
    height: 100vh;
    display:flex;
    flex-direction:column;
    align-items: center;
    image-rendering: pixelated; 
}

.separation{
    background-color:rgba(20,20,100,50%);
    height:1vh;
}

#zone_jeu {
    position:relative;
    background-color: lightgoldenrodyellow;
    border: 1vh solid darkgoldenrod;
    width: 100vh;
    height: 100vh;
    display:flex;
    align-items: center;
    justify-content: center;
}

#image_salle {
    width:100%;
    height:100%;
    display:block;
}

button {
    height:4vh;
    font-size: 3vh;
}