<section class="container"></section> .container {width:100%; padding: 7rem calc((100% - 1280px)/2);}@media only screen and (max-width: 1280px){ .sct_container {padding: 5rem 8%;}@media only screen and (max-width: 992px){ .sct_container {padding: 4rem 5%;}@media only screen and (max-width: 768px){ .sct_container {padding: 4rem 5%;}<section><div class="container"></div></section>.container {max-width:1280px; margin : 0 auto; width:80%;}