Centering opening title/ making a title screen

superwholockland

Do you know if it's possible to center the main menu to the very center? Whenever I try with the

<center></center>

code, what it does is center it to the middle of the playable area, not counting the sidebar, which makes it set to the right.
I set the sidebar to invisible using

body.sad #ui-bar {
	display: none;
}

, which makes all the text disappear from it, but still sets it to the right, like it's invisible but still there
My questions are, I guess,
1 Is there a way to completely center the main menu to the center?
2 Is there a way to remove the sidebar completely?
3 Is there a way to make a set title screen that doesn't include the sidebar at all?