body {
    margin: 0;
    padding: 0;

    display: flex;
    flex-direction: column;
    justify-content: center;

    align-items: center;
    background-image:url(img/background.png);
	
}

.image-gallery {
    display: flex;
    flex-direction: column;
    justify-content: space-around;

    align-items: center;
    
    width: 50%;
    height: 100%;
}

.img_logo
{
    height: 16% !important;
}

.image-gallery img {
    height: auto;
    width: 100%;
}

.btn {
  background: #3498db;
  background-image: -webkit-linear-gradient(top, #3498db, #2980b9);
  background-image: -moz-linear-gradient(top, #3498db, #2980b9);
  background-image: -ms-linear-gradient(top, #3498db, #2980b9);
  background-image: -o-linear-gradient(top, #3498db, #2980b9);
  background-image: linear-gradient(to bottom, #3498db, #2980b9);
  -webkit-border-radius: 28;
  -moz-border-radius: 28;
  border-radius: 28px;
  color: #ffffff;
  font-size: 20px;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
  text-align: center;
}

.btn:hover {
  background: #3cb0fd;
  background-image: -webkit-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -moz-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -ms-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -o-linear-gradient(top, #3cb0fd, #3498db);
  background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
  text-decoration: none;
}
#addToHomeScreen {
    display: block;
    margin: 0 auto;
    padding: 10px 20px;
    font-size: 16px;
    /* Centrer horizontalement le bouton */
    text-align: center;
}
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

img {
    width: 80%;
    height: auto;
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #3498db;
    color: #fff;
    border: none;
    cursor: pointer;
}


@media screen and (max-width: 600px) {
    img {
        max-height: 60%;
    }
}