resources/src/mediawiki.special.userlogin.login.styles/login.less
/* The login form invites users to create an account */
#mw-createaccount-cta {
width: 20em;
background: url( images/glyph-people-large.png ) no-repeat 50%;
margin: 0 auto;
padding-top: 7.8em;
font-weight: bold;
}
.mw-htmlform-codex a.cdx-button {
align-items: center;
display: inline-flex;
}