How to make a portfolio like this?

Question

css

How to make it so that it does not throw at the site, but the site was, as it were, in a window and it was active
On this site

Answer 1

Paste the iframe, this is how the Hawks did it, you can check it by pressing F12

Answer 2

Use FancyBox. Or any similar plugin.

Answer 3

https://mixitup.kunkalabs.com/
Look at this one, you can do this on it =)
In general, the site was robbed from the Maxel, look at the original.