Pure CSS and flexbox

👾Hi @RicardoTaipe, congratulations on your solution!👋 Welcome to the Frontend Mentor Coding Community!

Great solution and a great start! From what I saw you’re on the right track. I’ve few suggestions for you that you can consider adding to your code:

• Use <main> instead of a simple <div> this way you improve the semantics and accessibility showing which is the main block of content on this page. Remember that every page should have a <main> block and that <div> doesn't have any semantic meaning.
• Replace the <h2> containing the main title with <h1> note that this title is the main heading for this page and every page needs one h1 to show which is the most important heading. Use the sequence h1 h2 h3 h4 h5 to show the hierarchy of your titles in the level of importance, never jump a level.
• Add a margin of around margin: 20px to avoid the card touching the screen edges while it scales down.
• Save your time using a CSS RESET to remove all default settings that are annoying as the margins, paddings, and decorations and optimize it making it easier to work, see the article below where you can copy and paste this CSS code cheatsheet: https://piccalil.li/blog/a-modern-css-reset/

Here's my solution for this challenge if you wants to see how I build it: https://www.frontendmentor.io/solutions/qr-code-component-vanilla-cs-js-darklight-mode-nS2aOYYsJR

✌️ I hope this helps you and happy coding!