app/assets/stylesheets/commons/_devise.sass
.layout-devise
display: flex
flex-direction: column
justify-content: space-between
min-height: 100vh
header
padding: 100px 0
text-align: center
main
flex-grow: 1
min-height: auto
footer
min-height: auto
.mfa-code
font-size: pxToRem(26)
@include media-breakpoint-up(lg)
font-size: pxToRem(32)