How to position bottom of div above top of its container

Tags: css,css-position

Problem :

I'm working on a HTML/CSS module that functions like a modal but looks like a tooltip

<aside class="learn is-learn-top">
    <a class="learn__trigger" href="#learn-01">
        <span class="learn__icon">[icon]</span>
        <span class="learn__summary">Click here to learn more about TV pilots from Samual Jackson...who else</span>
    <div class="learn__content" id="learn-01">
        <a class="learn__close learn__x" href="#!">[close]</a>
          Well, the way they make shows is, they make one show. That show's called a pilot. Then they show that show to the people who make shows, and on the strength of that one show they decide if they're going to make more shows.

I'm using

.learn__content:not(:target) {
    display: none;

to keep that hidden unless the trigger is clicked. I'm trying to position .learn__content (which may be of varying height) above .learn like tooltip. How can I position it like this without using an explicit height? Here's what a have so far.

.learn {
    position: relative;

.learn__content {
    min-height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
    background: gold;

.is-learn-top .learn__content {
    transform: translateY(-100%);
    top: -100%;

but -100% doesn't seem to give the necessary offset.

Solution :

transform: translateY(-100%) 

And make sure you use WebKit, and moz if needed

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