/* optional */
li {
  line-height: 2; }

:invalid {
  outline: 1px solid red; }

.shell {
  position: relative;
  line-height: 1; }
  .shell span {
    position: absolute;
    left: 3px;
    top: 1px;
    color: #ccc;
    pointer-events: none;
    z-index: -1; }
    .shell span i {
      font-style: normal;
      /* any of these 3 will work */
      color: transparent;
      opacity: 0;
      visibility: hidden; }

input.masked,
.shell span {
  font-size: 16px;
  font-family: monospace;
  padding-right: 10px;
  background-color: transparent;
  text-transform: uppercase; }

/*# sourceMappingURL=masking-input.css.map */