.popup-gallery:not(.photos-1) {
display: flex;
flex-wrap: wrap;
margin: 0;
padding: 0;
list-style: none;
}
.popup-gallery.photos-2 li {
width: 50%;
}
.popup-gallery.photos-3 li {
width: 33.33%;
}
.popup-gallery.photos-4 li {
width: 25%;
}
.popup-gallery.photos-5 li {
width: 20%;
}
.popup-gallery.photos-6 li {
width: 16.66%;
}
.popup-gallery.photos-7 li {
width: 14.25%;
}
.popup-gallery.photos-8 li {
width: 12.5%;
}
.popup-gallery.photos-9 li {
width: 11.11%;
}
.popup-gallery.photos-10 li {
width: 10%;
}
.popup-gallery:not(.photos-1) ul li img {
vertical-align: top;
}