As you may know I just updated my web site. There are five columns which nicely slide up and down on a lower resolution. In other words, accordion-like navigation. Initially I made this effect with JavaScript. But there was a bug and I decided to use pure CSS. I wanted to define everything in CSS classes which to add or remove. The idea wasn't bad except the fact that every column contains dynamic content and I wasn't able to set the exact height when the column is slided down.