Reply To: Trying to slide sidebar a bit to the right

You’ve simply made the content too wide and the padding is too much:

#content {
float: left;
padding: 90px;
width: 800px;
}

Update that to:

#content {
float: left;
padding: 20px;
width: 728px;
}

Also, update:

#sidebar {
float: right;
margin-right: 0;
width: 20%;
}

to:

#sidebar {
float: right;
margin-right: 0;
padding: 40px 0;
width: 20%;
}

Overall, based on your customizations it seems you’re basically not interested/concerned with mobile use. In that case I would just set your minimum width to 1000px so that it’s simply a static/fixed width design for the best use here with your website.