summer-of-69-

👾Hello Wojtek Natkaniec, congratulations for your new solution!

Here's some tips to improve your solution:

Add background-size: contain; to make your background wave svg take the size full width and get centered with the card

body {
    font-size: 16px;
    font-family: 'Red Hat Display', sans-serif;
    background: var(--pale_blue) url(images/pattern-background-desktop.svg);
    background-repeat: no-repeat;
    background-size: contain;
}

Your shadow is too much dark and strong, to create a smooth shadow you need to give it less opacity and more blur here’s a good value for this shadow box-shadow: 5px 5px 15px 5px rgb(0 0 0 / 5%);

👋 I hope this helps you and happy coding!

thank's a lot! cheers :)