How do you increase the padding at the bottom of the window on Kindle?

Question

My MOBI is looking great, except for a very tight bottom padding on Kindle. On any of the Kindle devices I'm testing with (two Android, and an eInk version), the last sentence of a page is uncomfortably close to the "1 minute left in chapter" at the bottom.

I have tried this:

@page {
    margin-bottom: 10px !important;
    padding-bottom: 10px !important;
}

It did not help.

I have looked at other books, and they don't have this problem. Being unable to see their CSS, I can't tell what they di, but they are clearly leaving consistently more space between their last sentence of text and the status-ish stuff at the bottom of the window. So, I know it's possible to do this.

What's the trick to this?