picocss/scss/forms/_basics.scss

@use "sass:map";
@use "../settings" as *;

@if map.get($modules, "forms/basics") {
  // Helper
  $helper-previous-tags: "input, select, textarea";
  /**
   * Basics form elements
   */

  // Reboot based on :
  // - normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css
  // - sanitize.css v13.0.0 | CC0 1.0 Universal | github.com/csstools/sanitize.css
  // ––––––––––––––––––––

  // 1. Change the font styles in all browsers
  // 2. Remove the margin in Firefox and Safari
  input,
  optgroup,
  select,
  textarea {
    margin: 0; // 2
    font-size: 1rem; // 1
    line-height: var(#{$✨}line-height); // 1
    font-family: inherit; // 1
    letter-spacing: inherit; // 2
  }

  // Show the overflow in IE.
  input {
    overflow: visible;
  }

  // Remove the inheritance of text transform in Edge, Firefox, and IE
  select {
    text-transform: none;
  }

  // 1. Correct the text wrapping in Edge and IE
  // 2. Correct the color inheritance from `fieldset` elements in IE
  // 3. Remove the padding so developers are not caught out when they zero out
  // `fieldset` elements in all browsers
  legend {
    max-width: 100%; // 1
    padding: 0; // 3
    color: inherit; // 2
    white-space: normal; // 1
  }

  // 1. Remove the default vertical scrollbar in IE
  textarea {
    overflow: auto; // 1
  }

  // Remove the padding in IE 10
  [type="checkbox"],
  [type="radio"] {
    padding: 0;
  }

  // Correct the cursor style of increment and decrement buttons in Safari
  ::-webkit-inner-spin-button,
  ::-webkit-outer-spin-button {
    height: auto;
  }

  // 1. Correct the odd appearance in Chrome and Safari
  // 2. Correct the outline style in Safari
  [type="search"] {
    -webkit-appearance: textfield; // 1
    outline-offset: -2px; // 2
  }

  // Remove the inner padding in Chrome and Safari on macOS
  [type="search"]::-webkit-search-decoration {
    -webkit-appearance: none;
  }

  // 1. Correct the inability to style clickable types in iOS and Safari
  // 2. Change font properties to `inherit` in Safari
  ::-webkit-file-upload-button {
    -webkit-appearance: button; // 1
    font: inherit; // 2
  }

  // Remove the inner border and padding of focus outlines in Firefox
  ::-moz-focus-inner {
    padding: 0;
    border-style: none;
  }

  //  Remove the focus outline in Firefox
  :-moz-focusring {
    outline: none;
  }

  // Remove the additional :invalid styles in Firefox
  :-moz-ui-invalid {
    box-shadow: none;
  }

  // Change the inconsistent appearance in IE (opinionated)
  ::-ms-expand {
    display: none;
  }

  // Remove the border and padding in all browsers (opinionated)
  [type="file"],
  [type="range"] {
    padding: 0;
    border-width: 0;
  }

  // Pico
  // ––––––––––––––––––––

  // Force height for alternatives input types
  input:not([type="checkbox"], [type="radio"], [type="range"]) {
    height: calc(
      (1rem * var(#{$✨}line-height)) +
        (var(#{$✨}form-element-spacing-vertical) * 2) +
        (var(#{$✨}border-width) * 2)
    );
  }

  // Fieldset
  fieldset {
    margin: 0;
    margin-bottom: var(#{$✨}spacing);
    padding: 0;
    border: 0;
  }

  // Label & legend
  label,
  fieldset legend {
    display: block;
    margin-bottom: calc(var(#{$✨}spacing) * 0.375);
    font-weight: var(#{$✨}form-label-font-weight, var(#{$✨}font-weight));
  }

  fieldset legend {
    margin-bottom: calc(var(#{$✨}spacing) * 0.5);
  }

  // Blocks, 100%
  input:not([type="checkbox"], [type="radio"]),
  select,
  textarea {
    width: 100%;
  }

  // Reset appearance (Not Checkboxes, Radios, Range and File)
  input:not([type="checkbox"], [type="radio"], [type="range"], [type="file"]),
  select,
  textarea {
    appearance: none;
    padding: var(#{$✨}form-element-spacing-vertical) var(#{$✨}form-element-spacing-horizontal);
  }

  // Commons styles
  input,
  select,
  textarea {
    #{$✨}background-color: var(#{$✨}form-element-background-color);
    #{$✨}border-color: var(#{$✨}form-element-border-color);
    #{$✨}color: var(#{$✨}form-element-color);
    #{$✨}box-shadow: none;
    border: var(#{$✨}border-width) solid var(#{$✨}border-color);
    border-radius: var(#{$✨}border-radius);
    outline: none;
    background-color: var(#{$✨}background-color);
    box-shadow: var(#{$✨}box-shadow);
    color: var(#{$✨}color);
    font-weight: var(#{$✨}font-weight);

    @if $enable-transitions {
      transition: background-color var(#{$✨}transition), border-color var(#{$✨}transition),
        color var(#{$✨}transition), box-shadow var(#{$✨}transition);
    }
  }

  // Active & Focus
  input:not(
      [type="submit"],
      [type="button"],
      [type="reset"],
      [type="checkbox"],
      [type="radio"],
      [readonly]
    ),
  :where(select, textarea) {
    &:is(:active, :focus) {
      #{$✨}background-color: var(#{$✨}form-element-active-background-color);
    }
  }

  // Active & Focus
  input:not([type="submit"], [type="button"], [type="reset"], [role="switch"], [readonly]),
  :where(select, textarea) {
    &:is(:active, :focus) {
      #{$✨}border-color: var(#{$✨}form-element-active-border-color);
    }
  }

  // Focus
  input:not(
      [type="submit"],
      [type="button"],
      [type="reset"],
      [type="range"],
      [type="file"],
      [readonly]
    ),
  :where(select, textarea) {
    &:focus {
      #{$✨}box-shadow: 0 0 0 var(#{$✨}outline-width) var(#{$✨}form-element-focus-color);
    }
  }

  // Disabled
  input:not([type="submit"], [type="button"], [type="reset"])[disabled],
  select[disabled],
  textarea[disabled],
  label[aria-disabled="true"],
  :where(fieldset[disabled])
    :is(input:not([type="submit"], [type="button"], [type="reset"]), select, textarea) {
    #{$✨}background-color: var(#{$✨}form-element-disabled-background-color);
    #{$✨}border-color: var(#{$✨}form-element-disabled-border-color);
    opacity: var(#{$✨}form-element-disabled-opacity);
    pointer-events: none;
  }

  label[aria-disabled="true"] input[disabled] {
    opacity: 1;
  }

  // Aria-invalid
  :where(input, select, textarea) {
    &:not(
        [type="checkbox"],
        [type="radio"],
        [type="date"],
        [type="datetime-local"],
        [type="month"],
        [type="time"],
        [type="week"],
        [type="range"]
      ) {
      &[aria-invalid] {
        @if $enable-important {
          padding-right: calc(var(#{$✨}form-element-spacing-horizontal) + 1.5rem) !important;
          padding-left: var(#{$✨}form-element-spacing-horizontal);
          padding-inline-start: var(#{$✨}form-element-spacing-horizontal) !important;
          padding-inline-end: calc(var(#{$✨}form-element-spacing-horizontal) + 1.5rem) !important;
        } @else {
          padding-right: calc(var(#{$✨}form-element-spacing-horizontal) + 1.5rem);
          padding-left: var(#{$✨}form-element-spacing-horizontal);
          padding-inline-start: var(#{$✨}form-element-spacing-horizontal);
          padding-inline-end: calc(var(#{$✨}form-element-spacing-horizontal) + 1.5rem);
        }
        background-position: center right 0.75rem;
        background-size: 1rem auto;
        background-repeat: no-repeat;
      }

      &[aria-invalid="false"]:not(select) {
        background-image: var(#{$✨}icon-valid);
      }

      &[aria-invalid="true"]:not(select) {
        background-image: var(#{$✨}icon-invalid);
      }
    }

    &[aria-invalid="false"] {
      #{$✨}border-color: var(#{$✨}form-element-valid-border-color);

      &:is(:active, :focus) {
        @if $enable-important {
          #{$✨}border-color: var(#{$✨}form-element-valid-active-border-color) !important;

          &:not([type="checkbox"], [type="radio"]) {
            #{$✨}box-shadow: 0
              0
              0
              var(#{$✨}outline-width)
              var(#{$✨}form-element-valid-focus-color) !important;
          }
        } @else {
          #{$✨}border-color: var(#{$✨}form-element-valid-active-border-color);

          &:not([type="checkbox"], [type="radio"]) {
            #{$✨}box-shadow: 0
              0
              0
              var(#{$✨}outline-width)
              var(#{$✨}form-element-valid-focus-color);
          }
        }
      }
    }

    &[aria-invalid="true"] {
      #{$✨}border-color: var(#{$✨}form-element-invalid-border-color);

      &:is(:active, :focus) {
        @if $enable-important {
          #{$✨}border-color: var(#{$✨}form-element-invalid-active-border-color) !important;

          &:not([type="checkbox"], [type="radio"]) {
            #{$✨}box-shadow: 0
              0
              0
              var(#{$✨}outline-width)
              var(#{$✨}form-element-invalid-focus-color) !important;
          }
        } @else {
          #{$✨}border-color: var(#{$✨}form-element-invalid-active-border-color);

          &:not([type="checkbox"], [type="radio"]) {
            #{$✨}box-shadow: 0
              0
              0
              var(#{$✨}outline-width)
              var(#{$✨}form-element-invalid-focus-color);
          }
        }
      }
    }
  }

  [dir="rtl"] {
    :where(input, select, textarea) {
      &:not([type="checkbox"], [type="radio"]) {
        &:is([aria-invalid], [aria-invalid="true"], [aria-invalid="false"]) {
          background-position: center left 0.75rem;
        }
      }
    }
  }

  // Placeholder
  input::placeholder,
  input::-webkit-input-placeholder,
  textarea::placeholder,
  textarea::-webkit-input-placeholder,
  select:invalid {
    color: var(#{$✨}form-element-placeholder-color);
    opacity: 1;
  }

  // Margin bottom (Not Checkboxes and Radios)
  input:not([type="checkbox"], [type="radio"]),
  select,
  textarea {
    margin-bottom: var(#{$✨}spacing);
  }

  // Select
  select {
    // Unstyle the caret on `<select>`s in IE10+.
    &::-ms-expand {
      border: 0;
      background-color: transparent;
    }

    &:not([multiple], [size]) {
      padding-right: calc(var(#{$✨}form-element-spacing-horizontal) + 1.5rem);
      padding-left: var(#{$✨}form-element-spacing-horizontal);
      padding-inline-start: var(#{$✨}form-element-spacing-horizontal);
      padding-inline-end: calc(var(#{$✨}form-element-spacing-horizontal) + 1.5rem);
      background-image: var(#{$✨}icon-chevron);
      background-position: center right 0.75rem;
      background-size: 1rem auto;
      background-repeat: no-repeat;
    }

    &[multiple] {
      option {
        &:checked {
          background: var(#{$✨}form-element-selected-background-color);
        }
      }
    }
  }

  [dir="rtl"] {
    select {
      &:not([multiple], [size]) {
        background-position: center left 0.75rem;
      }
    }
  }

  // Textarea
  textarea {
    display: block;
    resize: vertical;

    &[aria-invalid] {
      @if $enable-important {
        #{$✨}icon-height: calc(
          (1rem * var(#{$✨}line-height)) +
            (var(#{$✨}form-element-spacing-vertical) * 2) +
            (var(#{$✨}border-width) * 2)
        );
        background-position: top right 0.75rem !important;
        background-size: 1rem var(#{$✨}icon-height) !important;
      }
    }
  }
  @if map.get($modules, "layout/grid") and $enable-classes {
    $helper-previous-tags: $helper-previous-tags + ", .grid";
  }

  :where(#{$helper-previous-tags}) {
    + small {
      display: block;
      width: 100%;
      margin-top: calc(var(#{$✨}spacing) * -0.75);
      margin-bottom: var(#{$✨}spacing);
      color: var(#{$✨}muted-color);
    }
    &[aria-invalid="false"] {
      + small {
        color: var(#{$✨}ins-color);
      }
    }
    &[aria-invalid="true"] {
      + small {
        color: var(#{$✨}del-color);
      }
    }
  }

  // Styles for Input inside a label
  label {
    > :where(input, select, textarea) {
      margin-top: calc(var(#{$✨}spacing) * 0.25);
    }
  }
}