Acme.BookStore.HttpApi.Host/node_modules/bootstrap-v4-rtl/scss/_input-group.scss

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// stylelint-disable selector-no-qualifying-type

//
// Base styles
//

.input-group {
  position: relative;
  display: flex;
  flex-wrap: wrap; // For form validation feedback
  align-items: stretch;
  width: 100%;

  > .form-control,
  > .form-control-plaintext,
  > .custom-select,
  > .custom-file {
    position: relative; // For focus state's z-index
    flex: 1 1 auto;
    width: 1%;
    min-width: 0; // https://stackoverflow.com/questions/36247140/why-dont-flex-items-shrink-past-content-size
    margin-bottom: 0;

    + .form-control,
    + .custom-select,
    + .custom-file {
      margin-left: -$input-border-width;
    }
  }

  // Bring the "active" form control to the top of surrounding elements
  > .form-control:focus,
  > .custom-select:focus,
  > .custom-file .custom-file-input:focus ~ .custom-file-label {
    z-index: 3;
  }

  // Bring the custom file input above the label
  > .custom-file .custom-file-input:focus {
    z-index: 4;
  }

  > .form-control,
  > .custom-select {
    &:not(:first-child) { @include border-left-radius(0); }
  }

  // Custom file inputs have more complex markup, thus requiring different
  // border-radius overrides.
  > .custom-file {
    display: flex;
    align-items: center;

    &:not(:last-child) .custom-file-label,
    &:not(:first-child) .custom-file-label { @include border-left-radius(0); }
  }

  &:not(.has-validation) {
    > .form-control:not(:last-child),
    > .custom-select:not(:last-child),