[lpghatguy]

There's nothing on this site using calc as part of scrolling the content. It looks like the background image is fixed in place with some JS, which is probably the source of the performance issues.

The questionable stuff is definitely that everything is a table and that the links on the bottom of the page are divs with onclick handlers... and that selection is turned off?

[Solvency]

Utterly untrue.

https://www.marticliment.com/#start

Inspect: https://imgur.com/a/ljJl0nr

[lpghatguy]

This has nothing to do with scrolling. They're fixed CSS rules. They remind me of the tricks we used to have to use for vertically centering things.

It seems like these rules are from the site's page load animation. You can see it if you refresh the page part way down. It's not a great way to achieve that effect.