.lightbox {
display: none;
position: fixed;
z-index: 999;
width: 100%;
height: 100%;
text-align: center;
top: 0;
left: 0;
background: rgba(0,0,0,0.8);
}
.lightbox img {
max-width: 90%;
max-height: 80%;
margin-top: 6%;
}
.lightbox:target {
outline: none;
display: block;
}
.hidden>div {
display:none;
}
.visible>div {
display:block;
}