body {
    margin: 0;
    height: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
    /*background-color: #959292; /* Fond d'écran légèrement gris */
    background-color: black; /* Fond d'écran noir */
}

.bg {
  /* The image used */
  /*background-image: url("img/background.png");

  /* Full height */
  height: 100%; 

  /* Center and scale the image nicely */
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
      z-index: 10;
}


#mon_image {
    position: fixed;
	top: 0;
	left: 0;
	width: 100vw;
	height: 100vh;
	object-fit: cover;
	opacity: 0.5;
	z-index: 1;
}
#mon_logo {
    position: fixed;
	top: 0;
	left: 0;
	width: 100vw;
	height: 100vh;
	object-fit: cover;
	opacity: 1;
	z-index: 1;
}