@Hassiai
Posted
Replace<div class="main">with the main tag and <div class="attribution"> with the footer tag to fix the accessibility issues. click here for more on web-accessibility and semantic html
To center .container on the page using flexbox, replace the height in the body with min-height: 100vh.
For a responsive content , replace the width in .container with max-width, there is no need to give it a height value and reduce the padding value for it to be equivalent to the design. padding:16px which is 1rem
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Use relative units like rem or em as unit for the padding, margin, width values and preferably rem for the font-size values, instead of using px which is an absolute unit. For more on CSS units Click here
Hope am helpful.
Well done for completing this challenge. HAPPY CODING