@use '../../config' as *;

.form-floating {
  // scss-docs-start form-floating-css-vars
  --form-floating-height: #{$form-floating-height};
  --form-floating-line-height: #{$form-floating-line-height};
  --form-floating-padding-x: #{var-if-default($form-floating-padding-x, $input-btn-padding-x, '--btn-input-padding-x')};
  --form-floating-padding-y: #{$form-floating-padding-y};
  --form-floating-input-padding-t: #{$form-floating-input-padding-t};
  --form-floating-input-padding-b: #{$form-floating-input-padding-b};
  --form-floating-label-height: #{$form-floating-label-height};
  // The textarea label masks the text under it. It is a sibling of the control,
  // so it cannot read the control's `--control-bg` and mirrors the scale instead.
  --form-floating-label-bg: #{var-if-default($input-bg, var(--bg-forms), '--btn-input-bg')};
  --form-floating-label-disabled-bg: #{$input-disabled-bg};
  --form-floating-label-border-radius: #{var-if-default($input-border-radius, var(--border-radius), '--btn-input-border-radius')};
  --form-floating-label-opacity: #{$form-floating-label-opacity};
  --form-floating-label-transform: #{$form-floating-label-transform};
  --form-floating-label-disabled-color: #{$form-floating-label-disabled-color};
  --form-floating-transition: #{$form-floating-transition};
  // scss-docs-end form-floating-css-vars

  position: relative;

  > .form-control,
  > .form-control-plaintext,
  > .form-select {
    height: var(--form-floating-height);
    min-height: var(--form-floating-height);
    line-height: var(--form-floating-line-height);
  }

  > label {
    position: absolute;
    top: 0;
    inset-inline-start: 0;
    z-index: 2;
    max-width: 100%;
    height: 100%; // allow textareas
    padding: var(--form-floating-padding-y) var(--form-floating-padding-x);
    overflow: hidden;
    color: color-transparent(var(--body-color), calc(var(--form-floating-label-opacity) * 100%));
    text-align: start;
    text-overflow: ellipsis;
    white-space: nowrap;
    pointer-events: none;
    border: $input-border-width solid transparent; // Required for aligning label's text with the input as it affects inner box model
    transform-origin: 0 0;
    @include transition(var(--form-floating-transition));
  }

  > .form-control,
  > .form-control-plaintext {
    padding: var(--form-floating-padding-y) var(--form-floating-padding-x);

    &::placeholder {
      color: transparent;
    }

    &:focus,
    &:not(:placeholder-shown) {
      padding-top: var(--form-floating-input-padding-t);
      padding-bottom: var(--form-floating-input-padding-b);
    }
    // Duplicated because `:-webkit-autofill` invalidates other selectors when grouped
    &:-webkit-autofill {
      padding-top: var(--form-floating-input-padding-t);
      padding-bottom: var(--form-floating-input-padding-b);
    }
  }

  > .form-select {
    padding-top: var(--form-floating-input-padding-t);
    padding-bottom: var(--form-floating-input-padding-b);
    padding-inline-start: var(--form-floating-padding-x);
  }

  > .form-control:focus,
  > .form-control:not(:placeholder-shown),
  > .form-control-plaintext,
  > .form-select {
    ~ label {
      transform: var(--form-floating-label-transform);
    }
  }
  // Duplicated because `:-webkit-autofill` invalidates other selectors when grouped
  > .form-control:-webkit-autofill {
    ~ label {
      transform: var(--form-floating-label-transform);
    }
  }
  > textarea:focus,
  > textarea:not(:placeholder-shown) {
    ~ label::after {
      position: absolute;
      inset: var(--form-floating-padding-y) calc(var(--form-floating-padding-x) * 0.5);
      z-index: -1;
      height: var(--form-floating-label-height);
      content: '';
      background-color: var(--form-floating-label-bg);
      @include border-radius(var(--form-floating-label-border-radius));
    }
  }
  > textarea:disabled ~ label::after {
    background-color: var(--form-floating-label-disabled-bg);
  }

  > .form-control-plaintext {
    ~ label {
      border-width: $input-border-width 0; // Required to properly position label text - as explained above
    }
  }

  > :disabled ~ label,
  > .form-control:disabled ~ label {
    // Required for `.form-control`s because of specificity
    color: var(--form-floating-label-disabled-color);
  }
}