Chatwoot/app/javascript/widget/assets/scss/_forms.scss

// scss-lint:disable PropertySortOrder DeclarationOrder QualifyingElement
$form-border-width: 1px;
$input-height: $space-two * 2;

.form-input {
  @include placeholder {
    color: $color-gray;
  }

  appearance: none;
  background: $color-white;
  border: $form-border-width solid $color-border;
  border-radius: $border-radius;
  box-sizing: border-box;
  color: $color-body;
  display: block;
  font-size: $font-size-default;
  height: $input-height;
  line-height: 1.3;
  max-width: 100%;
  outline: none;
  padding: $space-small $space-slab;
  position: relative;
  transition: background .2s, border .2s, box-shadow .2s, color .2s;
  width: 100%;

  &:focus {
    border-color: $color-primary;
  }

  &::placeholder {
    color: $color-gray;
  }

  // Input sizes
  &.small {
    font-size: $font-size-small;
    height: $space-large;
    padding: $space-small $space-slab;
  }

  &.large {
    font-size: $font-size-medium;
    height: $space-larger;
    padding: $space-slab $space-two;
  }

  &.input-inline {
    display: inline-block;
    vertical-align: middle;
    width: auto;
  }

  // Input types
  &[type="file"] {
    height: auto;
  }
}

// Form element: Textarea
textarea.form-input {
  @include placeholder {
    color: $color-light-gray;
  }

  &,
  &.large,
  &.small {
    height: auto;
  }
}