body {
    background-image: url("bgGray2.png");
}

.image_gallery{
    margin: 10px 50px;
}
.image_gallery img{
    width: 400px;
    height: 400px;
    padding: 5px;
    filter: grayscale();
    transition: 1s;
}

.image_gallery img:hover{
    filter: grayscale(0);
    transform: scale(1.1);
}


.single_image_display {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.9);
  }
.image_content {
    margin: auto;
    display: block;
    max-width: 80%;
    max-height: 80%;
  }
.close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 50px;
    font-weight: bold;
    color: white;
    cursor: pointer;
  }