Bootstrap
Other "Static Site Generators"
Wix, Squarespace et a
Anything that speaks markdown
OBSIDIAN?
The only good 400lb gorilla.
It's old and scattered and messy..
..but has survived for so long as open source, wow.
Remember, it started off as a "blog," but people use it for much more.
This explains a lot about why it looks how it does..
And specifically, why it took so long to get more robust "page layout" stuff.
"Blocks" are here, and I haven't tried them yet.
"Elementor" and "Divi" are themes that did this sort of thing first.
In fact;
(and it pains me to no end to admit it..)
do you even want/need to build a website at all?
Understanding a bit of this helps with social media, esp
"Open Graph" (for Facebook and Linked in)
and
"Twitter Cards"
HTML/CSS/Javascript might actually end up doing better, namely
Making the OS not matter. Java mostly does this, but isn't super popular
Lots of applications being written with HTML/CSS/JS et al. Some are slow,
but some are pretty good (lookin' at you Discord)