input[type="text"] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  border: 0;
  outline: 0;
  background: transparent;
  width: 8.70em;
  font-size: 1em;
}

.input-wrapper, input[type="text"] {
  letter-spacing: .1em;
  background: #ffbf3a;
}

.input-wrapper {
  display: inline;
  position: relative;
  overflow: hidden;
  padding-bottom: .2em;
  font-size: 100%;
}

.input-wrapper:after {
  content: " ";
  line-height: .3em;
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: -1;
}