Responsive, mobile first landing page using Sass and Flexbox

Nice work on this challenge, your solution looks really good! Here are a couple of recommendations after taking a look at your code would be:

• Using IDs for styling purposes can lead to bad CSS practices pretty quickly. They can't be reused on the same page and are overly specific. Instead, I'd recommend using either class, attribute, pseudo, or element/type selectors for styling.
• You add in more HTML5 structural elements like section and main to add even more context to your HTML structure.

I hope you find these tips useful. Keep up the great work!