QR code component using html and css

Hello Hana!

Your project looks great!

I noticed that you used position with top and left properties to center your card. But in mobile version, this is kinda squeezing your card a little bit.

I have a suggestion for you to center your card, so you can try and tell me if it works well for you:

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

I hope it helps!