Four-card-feature-section

Hello there!

I'm submitting another newbie project. This time I had problems mainly problems with moving svg elements via flexbox (ultimately done it by margin keyword).

Mobile version is not yet coded. I am also aware that I should use relative sizing measures - do u know how easily incorporate them into the code/use them smoothly? Using fixed measures (px) feels so intuitive!

Please feel free to comment the code. Any suggestions are more than welcome :)

Thanks!