
I want the left and right edges of the header to be flush with the left and the right sides of the light-blue container. But no matter what css code I use to center the header, I get the above result. This is the code I'm currently using.
#header {
position: relative;
width: 1020px;
margin-left: auto;
margin-right: auto;
}
A similar thing happens to the tables, which I want to widen so that there's only 10 px padding between the left and the right sides and the outer edges of the container, The right side expands and, in the case of the tables, is cropped in the process.
I know there's some code interfering with all this, but I don't know what it is. If you could steer me in the right direction, I'd be grateful.
Many thanks!
P.S. I'm running the board on my computer at the moment, so I can't provide a link to it. I've attached the styles template if you need to look at it.

















