4: there are two active styles pre-programmed
12: you can add however many you want
14: or, if that sounds like a lot of work, you can change the color right in the HTML
15: don't forget unicode is great shorthand
if you think the buttons are cramped (fair), make entire divs links :)
If you want to use the corner elements, you can style the content div in such a way that that corners are rounded as well. Unfortunately, that doesn't auto wrap the text. But you can keep it legible by adding blank spaces.
These are just some little guys but you can use them too.
For all entries in these left hand displays, make sure to use the p tag! If you don't, your text will be hidden behind the overlay on the right.