[Theme: Crucial] Cannot get menu to stretch across the entire page

My website is http://www.samplesympathymessages.com and I am using the crucial theme with a menu bar at the top. Everything was fine until I added a new page today and it caused the menu to wrap around to two lines on top of each other. I instead want the menu to keep going across the dark purple line all the way across the page. I have tried editing the css the best I know how but it didn’t help. I plan on adding one other page to this menu so I will really appreciate any one that can help me.