pinafore/routes/settings/_components/SettingsList.html

<ul class="settings-list">
  <slot></slot>
</ul>
<style>
  ul.settings-list {
    list-style: none;
    width: 100%;
    border: 1px solid var(--settings-list-item-border);
    margin: 20px auto;
  }

  @media (max-width: 767px) {
    ul.settings-list {
      max-width: 90%;
    }
  }

</style>