New Member - Formatting height and width for cells of CSS Drop Down Menu

I have three questions:

1. How to set the height of the cells in a way other than using "line-height" ?* I can't find a way to do it other than by using "line-height," and that screws things up when my text is longer than one line and wraps. I think I've tried margin and padding, without luck, but perhaps I'm not doing it right.

2. How to set the width of the cells so that they will start at a specific designated width for the top visible navigation cell, but automatically assume a wider width as necessary to accommodate the longest string of text when a user clicks on that top cell to reveal the sub-menu choices below?

3. How to display menu items towards the bottom of the stack that get cut off by the page height of the browser window?

Thanks!

Just a quick update. I found my answers. Found the culprits and found the solutions. Thanks for those who took the time to review my plea for clues.