I’m completly fresh to WordPress and also to CSS/HTML, so everything what I have already done on my site, has been done mostly by your help from the other topics (Thanks to everyone!) or some CSS basics I have learned in the last few days.
My question is: Is there any possibility to make it: after clicking on the project thumbnail (in PORTFOLIO section) it will pop-up the window with full-image size of the project (instead of sending the user to the different URL with some kind of blog post section)?
I tried to make it by myself, but it was too tough.
Here is the link to the website: http://www.threelines.pl
Here are the additional CSS I’ve already added by myself: https://pastebin.com/9YHxHye4