Responsive site using Sass and flex box

You did great, almost similar to design, and responsive.

What I found in your code is sometimes you use too much specificity selector. You shouldn't over qualifying selectors. for example don't do this

.cards .column1 .card1 {
  your style
}

do this

.card1 {
  your style
}

Hi Costi, Great looking solution!

I'd use a little bit of semantic HTML and make <div class="card1 card"> into an <article>; since each card is a unique stand-alone content.

Best of luck with your coding journey!