tabler/scss/ui/_forms.scss

textarea {
  &[cols] {
    height: auto;
  }
}

/**
Form label
 */
.form-label {
  font-size: $h4-font-size;
  font-weight: $font-weight-bold;
  display: block;
  margin-bottom: .5rem;
}

.form-label-description {
  float: right;
  font-weight: $font-weight-normal;
  color: $text-muted;
  line-height: $line-height-base * (100%/$small-font-size);
  font-size: $small-font-size;
}

/**
Form hint
 */
.form-hint {
  font-size: $small-font-size;
  color: $text-muted;
  margin: 0 0 .75rem;
  line-height: $line-height-sm;
}

/**
Form control
 */
.form-control {
  &:-webkit-autofill {
    box-shadow: 0 0 0 1000px #ffffff inset;
  }

  &:disabled,
  &.disabled {
    color: $text-muted;
    user-select: none;
  }

  &[size] {
    width: auto;
  }
}

.form-control-light {
  background-color: $gray-100;
  border-color: transparent;
}

.form-footer {
  margin-top: 2rem;
}

.form-fieldset {
  padding: 1rem;
  margin-bottom: 1rem;
  background: $min-black;
  border: 1px solid $border-color;
  border-radius: $border-radius;
}

.form-required {
  color: $red;
}

.custom-control-label::before {
  background: transparent;
  border: 1px solid $border-color;
}

/**
Form help
 */
.form-help {
  display: inline-flex;
  font-weight: 600;
  align-items: center;
  justify-content: center;
  width: 1.125rem;
  height: 1.125rem;
  font-size: .75rem;
  color: $text-muted;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  background: $gray-200;
  border-radius: 50%;
  transition: .3s background-color, .3s color;

  &:hover,
  &[aria-describedby] {
    color: #ffffff;
    background: $primary;
  }
}

/**
Form switch
 */
.form-check-input {
  color: $form-check-input-checked-bg-color;

  &:checked {
    background-color: currentColor;
  }
}

.form-check .form-check-input:not(:checked) ~ .form-check-label {
  color: $text-muted;
}

/**
Input group
 */
.input-group-prepend .input-group-text {
  border-right: 0;
}

.input-group-append .input-group-text {
  border-left: 0;
}

.input-group-flat {
  &:focus-within {
    box-shadow: $input-focus-box-shadow;
    border-radius: $input-border-radius;

    .form-control,
    .input-group-text {
      border-color: $input-focus-border-color !important;
    }
  }

  .form-control {
    &:focus {
      border-color: $input-border-color;
      box-shadow: none;
    }

    &:not(:last-child) {
      border-right: 0;
    }

    &:not(:first-child) {
      border-left: 0;
    }
  }

  .input-group-prepend {
    margin-right: 0;

    .input-group-text {
      padding-right: 0;
    }
  }

  .input-group-append {
    margin-left: 0;

    .input-group-text {
      padding-left: 0;
    }
  }

  .input-group-text {
    background: transparent;
    transition: $input-transition;
  }
}