@Hassiai
Posted
Replace<div class="card">with the main tag and <div class="attribution"> with the footer tag to fix the accessibility issues. for more on semantic html visit https://web.dev/learn/html/semantic-html/
To center .card on the page, add min-height:100vh; display: flex; align-items: center: justify-content: center; or min-height:100vh; display: grid place-items: center to the body.
For the color of the image, give .image-container a background-color of soft violet. give the img mix-blend-mode: multiply; opacity: 0.8; width 100%.
Use rem or em as unit for the padding, margin, width and preferably rem for the font-size for more on CSS units watch this https://youtu.be/N5wpD9Ov_To
Hope am helpful.
Well done for completing this challenge. HAPPY CODING