<details>
  <summary>Example</summary>
  Height needs to be set for this to work. Works on Chrome, haven't tested further.
</details>


//Build in transition smooothly
details {
  transition: height 1s ease;
  overflow: hidden;
}

details:not([open]) {
  height: 1.25em;
}

details[open] {
  height: 2.5em;
}