vue-material/src/components/mdInputContainer/mdInputContainer.scss

@import '../../core/variables.scss';

$input-size: 32px;

.md-input-container {
  min-height: 48px;
  margin: 16px 0 8px;
  padding-top: 16px;
  position: relative;

  &:after {
    height: 0;
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    background-color: transparent;
    transition: $swift-ease-out;
    transition-duration: .2s;
    content: " ";
  }

  label {
    position: absolute;
    top: 23px;
    left: 2px;
    pointer-events: none;
    transition: $swift-ease-out;
    transition-duration: .3s;
    color: rgba(#000, .54);
    font-size: 16px;
    line-height: 20px;
  }

  input {
    width: 100%;
    height: $input-size;
    display: block;
    border: none;
    background: none;
    border-bottom: 1px solid rgba(#000, .12);
    transition: .3s $swift-ease-out-timing-function;
    transition-property: font-size, line-height;
    color: rgba(#000, .54);
    font-size: 0;
    line-height: 0;

    &:focus {
      outline: none;
    }

    &::-webkit-input-placeholder {
      position: relative;
      top: 6px;
      color: rgba(#000, .54);
      font-size: 16px;
      line-height: $input-size;
      text-shadow: none;
      -webkit-text-fill-color: initial;
    }
  }
}

.md-input-focused,
.md-has-value {
  input {
    font-size: 16px;
    line-height: $input-size;
  }

  label {
    pointer-events: auto;
    top: 0;
    left: 0;
    font-size: 12px;
  }
}