body > main
  display: flex
  align-items: center
  justify-content: center
  .form-control
    background-color: #1d1f21
    color: #c9cacc
    &:focus
      background-color: #404449
      color: #c9cacc
  .input-group-addon
    background-color: #000
    color: #fff
    width: 2.4rem