Change Theme width

Hi all.

I want to change theme width or margins to have more space for content and bigger adsense ads. Maybe 1 cm left and right to increase content space. I want to put two ads 336x280 next to one another.

This isn’t that easy as it might sound.

The basic idea would be like this:

.wrapper {
    max-width: 1118px;
}

.container {
    max-width: 100%;
}

.hgroup-wrap {
    padding: 30px;
}

.slides img {
    width: 100%;
}

.post-featured-image img {
    width: 100%;
}

Add this code to Theme Options - Other - Custom CSS.
But you will run into other issues with responsiveness and probably other things, so it would be great if you would know some basic CSS to fix everything that gets broken afterwards.

I will work on this issue, in particular it would be great to change only the header to have a full width header (header title and slide 100% width). Something as in the sparkling theme, I think is not a great problem to reach this layout. More difficult is to add this option in the customization page of the layout without adding css code in the child theme.
Carlo