Responsive Vanilla Javascript Lightbox

See the result here

Special thanks for the pictures:

image 1 - Image by James Wheeler from Pixabay - https://pixabay.com/users/jameswheeler-5314099/?utm_source=link-attribution&utm_medium=referral&utm_campaign=image&utm_content=2297204

Image 2 - Image by Laci Döme from Pixabay - https://pixabay.com/users/domelaci-2136711/?utm_source=link-attribution&utm_medium=referral&utm_campaign=image&utm_content=1244132

Image 3 - Image by David Mark from Pixabay - https://pixabay.com/users/12019-12019/?utm_source=link-attribution&utm_medium=referral&utm_campaign=image&utm_content=1587287

Image 4 - Image by Pfüderi from Pixabay - https://pixabay.com/users/pfüderi-199315/?utm_source=link-attribution&utm_medium=referral&utm_campaign=image&utm_content=1681485

Image 5 - Image by Julius Silver from Pixabay - https://pixabay.com/users/julius_silver-4371822/?utm_source=link-attribution&utm_medium=referral&utm_campaign=image&utm_content=3609863

Image 6 - Image by David Mark from Pixabay - https://pixabay.com/users/12019-12019/?utm_source=link-attribution&utm_medium=referral&utm_campaign=image&utm_content=1768744