.hidden
  display: none
  opacity: 0.0

.invalid
  display: inline-flex
  font-size: 0.6rem
  margin-left: 1rem
  color: color-warning
  opacity: 0.0
  animation-fill-mode: forwards
  animation-name: fadein
  animation-duration: 350ms
  animation-delay: 200ms
  .icon
    line-height: 1
    margin-right: 0.25rem