First landing page

For the left and right side spaces on the page, give the header, the main and the footer a max-width of 1440px, a width of 80% and margin: 0 auto. instead of giving the body a padding value

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

give the main img a width of 40% and .main-txt a width of 55% in the media query for the mobile design give the main img and .main-txt a width of 100% . To make the image responsive, give the img a max-width of 100%

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