I've had this problem before with a different template and tried the same solution with this one and it doesn't seem to have worked. The issue can be seen here
Try adding the following to your stylesheet... it'll get you close, but if you need more changes, just let us know what you don't like:
.jfbcLogin {
padding: 0;
background: none;
}
That will affect all instances of the login button, so test if you have it on other pages. If it does (negatively), we can make those styles more specific to just that button in the menu.
Problem with login button in main menu
