input margin: .5em 0 causes problem with autocomplete popup

Autocoplete popups partially cover autocomplete fields (see attached screenshot).

pixture_reloaded.css:

input {
  margin: .5em 0;
  max-width: 100%;
}

That solved the problem for me:

input {
  margin: 0;
}

...or:

input.form-autocomplete {
  margin: 0;
}