The breakpoints I can suggest to you is what I usually used:
Tablet - 768px
Laptop/Desktop - 1024px
I have seen your code that you have use 64em, which is 1024px for laptop/desktop. You can check this from StackOverflow, and this from Reddit for which breakpoints you should work in media queries.
I hope this is helpful to you. Good luck, and happy coding! :D
I just seen your code and preview site. Based on the code above you have write in sass file, I can suggest you to use max-width for your card component.
<span class="c-card__creator__text">Creation of </span>
<p class="c-card__creator__name">Jules Wyvern</p>
And this part of code in html, I suggest you should put the <span> tag inside the <p> tag like the code below.
I have seen your code indicating that you are using TailwindCSS for this challenge. However, I have little experience with TailwindCSS. The feedback I can give you is that your preview site doesn't show based on the solution you submitted.