How to do media command mathematically?

I want to reduce the margin from 35 to 15 as the screen size reduces from max to 600px

I would like margin number to be mathematically calculated as it would be cumbersome to keep adding media commands.  Is it possible to achieve it, how?

#DevMenu li

    padding: 0px 35px 0px 10px;

@media screen and (max-width:800px)
#DevMenu li
    padding: 0px 20px 0px 10px;
@media screen and (max-width:600px)
#DevMenu li
    padding: 0px 10px 0px 10px;
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Julian HansenCommented:
Your question mentions margin - but the sample code is padding?

CSS does not know about browser widths or dimensions it merely gives instructions on how to work with those

You can do this with javascript however what is your function you want for diminishing the margin.

For instance - what is a 700px width supposed to have as a margin.

At what point does it get to be 35px? - I am going to assume 1024 and you can amend from there

<!doctype html>
<style type="text/css">
.something {
  margin: 35px;
<div class="something-container">
  Container top
  <div class="something">
    variable margine here
  Container bottom
<script src=""></script>
<script type="text/javascript">
$(function() {
  $(window).on('resize', setMargin);
function setMargin()
  // working in the range 600 to 1024
  var width = Math.min(1024, Math.max(600, $(window).width()));
  value = 15 + ((width-600)/424) * 20;
  $('.something').css({margin: value + 'px'});


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goodkAuthor Commented:
thank you.

Could we do it without using jquery?
Julian HansenCommented:
Could we do it without using jquery?

You mean with just CSS (no)
You mean with plain javascript (yes)
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