Change padding in style.css

Hello,

I would like to change the padding of the style.css but I am not able to do it.

This is the part I would like to change:

#main {
    background-image: url("images/contentbg.png");
    background-repeat: repeat-y;
    background-position: top left;
    background-size: contain;
    padding: 3em 34px;
    overflow: hidden;
}

And what I want is this:

#main {
    background-image: url("images/contentbg.png");
    background-repeat: repeat-y;
    background-position: top left;
    background-size: contain;
    padding: 1em 34px;
    overflow: hidden;
}

but I have edited the style.css and it is not showing any changes. Is there something blocking my changes?

This is the website if you would like to see it: http://www.todoliposuccion.com

Thanks