Module:Clickable button/styles.css
.cdx-button--short-label {
min-width: 32px; /* @min-size-interactive-pointer as mentioned by Codex doc */
}
.cdx-button--word-wrap {
max-width: none;
white-space: normal;
word-wrap: break-word;
}
.cdx-button__icon {
display: inline-block;
height: 1.25em;
min-height: 20px;
min-width: 20px;
width: 1.25em;
}