AdminLTE/build/scss/_forms.scss

/*
 * Component: Form
 * ---------------
 */
.form-group {
  &.has-icon {
    position: relative;
    .form-control {
      padding-right: 35px;
    }
    .form-icon {
      cursor: pointer;
      position: absolute;
      right: 3px;
      top: 0;
      padding: $input-btn-padding-y $input-btn-padding-x;
      // margin-top: -3px;
      border: 0;
      background-color: transparent;
      font-size: 1rem;
    }
  }
}

/* button groups */
.btn-group-vertical {
  .btn {
    &.btn-flat:first-of-type, &.btn-flat:last-of-type {
      @include border-radius(0);
    }
  }
}

/* Support Font Awesome icons in form-control */
.form-control-feedback.fa {
  line-height: $input-height;
}

.input-lg + .form-control-feedback.fa,
.input-group-lg + .form-control-feedback.fa,
.form-group-lg .form-control + .form-control-feedback.fa {
  line-height: $input-height-lg;
}

.input-sm + .form-control-feedback.fa,
.input-group-sm + .form-control-feedback.fa,
.form-group-sm .form-control + .form-control-feedback.fa {
  line-height: $input-height-sm;
}

label:not(.form-check-label, .custom-file-label) {
  font-weight: $font-weight-bold;
}