Mantra Theme Form

mantra_theme.libraries.yml

form:
  css:
    component:
      css/drupal/component/form.css: {}

form.css

.form-item {
    margin: 1rem 0;
}

.filter-help {
    margin-top: -1rem;
}

form.html.twig

Attach form library.

{{ attach_library('mantra_theme/form') }}
<form{{ attributes }}>
  {{ children }}
</form>

container--text-format-filter-help.html.twig

Add filter-help class.

<div{{ attributes.addClass('filter-help') }}>{{ children }}</div>