Module:Cdx-button/styles.css

 /* Only use CSS to target the button object created by the template/module. */
 span.cdx-button.cdx-button--fake-button.tpl-cdx-button__object.tpl-cdx-button--short-label{
 min-width:32px;/* @min-size-interactive-pointer as mentioned by Codex doc */
 }

 span.cdx-button.cdx-button--fake-button.tpl-cdx-button__object.tpl-cdx-button--word-wrap{
 max-width:none;
 white-space:normal;
 word-wrap:break-word;
 }

 span.cdx-button__icon.tpl-cdx-button__icon{
 display:inline-block;
 height:1.25em;
 min-height:20px;
 min-width:20px;
 width:1.25em;
 }