I believe the code below should fix your problem. Just delete the text in your file css/style.css and replace it with the code below.
The reason why it was being cutoff was because on the .slide div it had a padding of
padding: 8px 10px;
Which means it was having 8px on the top and bottom and 10px left and right.
when I changed it to the code below it gave a 20px padding at the top so it pushes the headings and images down but has no padding on the right or the left or the bottom. (It works like a clock first value (top) second value (right) and so on around the clock in a clockwise direction). This is how I remember it. Hope this helps, let me know if you have any problems implementing the code.