flex solution

Add aria-label attribute aria-label=" " to the <a> of the social media icons to fix the error and accessibility issue. The value of the aria-label is the description of the image. For more aria-label click here

For the left-side and right-side, give the main a max-width of 1440px , a width of 80% margin: 0 auto.

main{
max-width: 1440px;
width: 80%;
margin: 0 auto ;
}

There is no need for display: flex and its properties in the body.

Add display: inline-block to the button

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