Where can I find visual examples of schemes for prototyping a website?

Question

Layouts and prototypes

Good evening.
I want to write or find a library/css framework for quickly prototyping pages. Among other things, I want to focus on the visual component of the layout (that is, to have a clean flat design at the output). The main snag is that I'm a little lost in where (or how) to find visual examples of the execution of this kind of schemes / blocks / elements (yes, I need a starting point, it's still hard for me to design completely from scratch). Interested at least on what request to knock on Google (ala flowchart kit). In addition, perhaps I'm missing a ready-made framework.

Here's roughly what I'm looking for (not exactly schematic, but clean enough)

Or quite schematic (but preferably cleaner), like here

Ps I’ll immediately note that I’m not looking for tools sharpened for this (mockflow, moqups, marvel and others), I need a library directly (ready-made or which I throw myself) with which, using simple html, you can create a typical schematic block (product card, menu, footer).
Thank you.

Answer 1

In general , I found where to dig .

Answer 2

Any html/css framework.