Block Display Item Scaling issue

Scrollable aside

How would you recreate a button like this?

The site is responsive when viewed on codepen. Why not when served from GitHub pages?
What's a good way of handling specific styling for components?
Animate Button if active

Is there a way to recreate this design from dribbble with html and css?
How do Amazon and Facebook hide their response from the network tab?
Navbar going transparent in mobile view

Responsive 2 column layout with header and footer
SVG's group floating inside container instead of origin'd at 0,0

linear-gradient border
CSS Variables Question
"Add an overlay to a background-image with one line of CSS" - Border radius does not works
overflow set up for hidden, but nothing changes. Thank you!...
Rec'd React libraries for fullscreen preview window component?
how do I represent this properly in the dom

SVG's not visible
Aligning sibling labels with card content

Why does position: sticky doesn't work when parent is set to overflow: hidden?
pls help me
