How to achieve vertical div alignment in unique situation?

Go to my blog and please tell me how to achieve vertical alignment :( My situation truly is different and I need help :)

The reason this is so difficult is because holder is the div that contains everything, outer are开发者_如何学Python the icons at the bottom, and tooltip are the divs that pop up. I need tooltip to be vertically aligned but they are actually below outer. Each icon is connected to their post so you can't keep them all in one div.

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how about:

#holder{
     bottom:50%;
}