I'm making a browser strategy game.
Now my problem is that I have a feeling that my design is dated. For now I have only used background colors and borders to make things look nice, but I have planed to add some pictures later.
Here is what it looks like now:
You will see that the game has a top and bottom bar and has the main section in the middle. My main concern is that this may not be best idea, because not full width and height of the window is used.
What strategies can I use to update the visuals of the site to a more modern look?