// stylelint-disable at-rule-no-vendor-prefix, declaration-no-important, selector-no-qualifying-type, property-no-vendor-prefix // Reboot // // Normalization of HTML elements, manually forked from Normalize.css to remove // styles targeting irrelevant browsers while applying new styles. // // Normalize is licensed MIT. https://github.com/necolas/normalize.css // Document // // Change from `box-sizing: content-box` so that `width` is not affected by `padding` or `border`. *, *::before, *::after { box-sizing: border-box; } // Body // // 1. Remove the margin in all browsers. // 2. As a best practice, apply a default `background-color`. // 3. Prevent adjustments of font size after orientation changes in IE on Windows Phone and in iOS. // 4. Change the default tap highlight to be completely transparent in iOS. body { margin: 0; // 1 font-family: $font-family-base; @include font-size($font-size-base); font-weight: $font-weight-base; line-height: $line-height-base; color: $body-color; text-align: $body-text-align; background-color: $body-bg; // 2 -webkit-text-size-adjust: 100%; // 3 -webkit-tap-highlight-color: rgba($black, 0); // 4 } // Future-proof rule: in browsers that support :focus-visible, suppress the focus outline // on elements that programmatically receive focus but wouldn't normally show a visible // focus outline. In general, this would mean that the outline is only applied if the // interaction that led to the element receiving programmatic focus was a keyboard interaction, // or the browser has somehow determined that the user is primarily a keyboard user and/or // wants focus outlines to always be presented. // // See https://developer.mozilla.org/en-US/docs/Web/CSS/:focus-visible // and https://developer.paciellogroup.com/blog/2018/03/focus-visible-and-backwards-compatibility/ [tabindex="-1"]:focus:not(:focus-visible) { outline: 0 !important; } // Content grouping // // 1. Reset Firefox's gray color // 2. Set correct height and prevent the `size` attribute to make the `hr` look like an input field // See https://www.w3schools.com/tags/tryit.asp?filename=tryhtml_hr_size hr { margin: $hr-margin-y 0; color: $hr-color; // 1 background-color: currentColor; border: 0; opacity: $hr-opacity; } hr:not([size]) { height: $hr-height; // 2 } // Typography // // 1. Remove top margins from headings // By default, `

`-`

` all receive top and bottom margins. We nuke the top // margin for easier control within type scales as it avoids margin collapsing. %heading { margin-top: 0; // 1 margin-bottom: $headings-margin-bottom; font-family: $headings-font-family; font-style: $headings-font-style; font-weight: $headings-font-weight; line-height: $headings-line-height; color: $headings-color; } h1 { @extend %heading; @include font-size($h1-font-size); } h2 { @extend %heading; @include font-size($h2-font-size); } h3 { @extend %heading; @include font-size($h3-font-size); } h4 { @extend %heading; @include font-size($h4-font-size); } h5 { @extend %heading; @include font-size($h5-font-size); } h6 { @extend %heading; @include font-size($h6-font-size); } // Reset margins on paragraphs // // Similarly, the top margin on `

`s get reset. However, we also reset the // bottom margin to use `rem` units instead of `em`. p { margin-top: 0; margin-bottom: $paragraph-margin-bottom; } // Abbreviations // // 1. Duplicate behavior to the data-* attribute for our tooltip plugin // 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari. // 3. Add explicit cursor to indicate changed behavior. // 4. Prevent the text-decoration to be skipped. abbr[title], abbr[data-original-title] { // 1 text-decoration: underline; // 2 text-decoration: underline dotted; // 2 cursor: help; // 3 text-decoration-skip-ink: none; // 4 } address { margin-bottom: 1rem; font-style: normal; line-height: inherit; } ol, ul { padding-left: 2rem; } ol, ul, dl { margin-top: 0; margin-bottom: 1rem; } ol ol, ul ul, ol ul, ul ol { margin-bottom: 0; } dt { font-weight: $dt-font-weight; } // 1. Undo browser default dd { margin-bottom: .5rem; margin-left: 0; // 1 } blockquote { margin: 0 0 1rem; } // Add the correct font weight in Chrome, Edge, and Safari b, strong { font-weight: $font-weight-bolder; } // Add the correct font size in all browsers small { @include font-size($small-font-size); } // Prevent `sub` and `sup` elements from affecting the line height in // all browsers. sub, sup { position: relative; @include font-size(75%); line-height: 0; vertical-align: baseline; } sub { bottom: -.25em; } sup { top: -.5em; } // Links a { color: $link-color; text-decoration: $link-decoration; &:hover { color: $link-hover-color; text-decoration: $link-hover-decoration; } } // And undo these styles for placeholder links/named anchors (without href). // It would be more straightforward to just use a[href] in previous block, but that // causes specificity issues in many other styles that are too complex to fix. // See https://github.com/twbs/bootstrap/issues/19402 a:not([href]) { &, &:hover { color: inherit; text-decoration: none; } } // Code pre, code, kbd, samp { font-family: $font-family-monospace; @include font-size(1em); // Correct the odd `em` font sizing in all browsers. } // 1. Remove browser default top margin // 2. Reset browser default of `1em` to use `rem`s // 3. Don't allow content to break outside pre { display: block; margin-top: 0; // 1 margin-bottom: 1rem; // 2 overflow: auto; // 3 @include font-size($code-font-size); color: $pre-color; // Account for some code outputs that place code tags in pre tags code { @include font-size(inherit); color: inherit; word-break: normal; } } code { @include font-size($code-font-size); color: $code-color; word-wrap: break-word; // Streamline the style when inside anchors to avoid broken underline and more a > & { color: inherit; } } kbd { padding: $kbd-padding-y $kbd-padding-x; @include font-size($kbd-font-size); color: $kbd-color; background-color: $kbd-bg; @include border-radius($border-radius-sm); kbd { padding: 0; @include font-size(100%); font-weight: $nested-kbd-font-weight; } } // Figures // Apply a consistent margin strategy (matches our type styles). figure { margin: 0 0 1rem; } // Images and content img { vertical-align: middle; } // 1. Workaround for the SVG overflow bug in IE 11 is still required. // See https://github.com/twbs/bootstrap/issues/26878 svg { overflow: hidden; // 1 vertical-align: middle; } // Tables // Prevent double borders table { border-collapse: collapse; } caption { padding-top: $table-cell-padding; padding-bottom: $table-cell-padding; color: $table-caption-color; text-align: left; caption-side: bottom; } // Matches default `` alignment by inheriting from the ``, or the // closest parent with a set `text-align`. th { text-align: inherit; } // Forms // 1. Allow labels to use `margin` for spacing. label { display: inline-block; // 1 margin-bottom: $label-margin-bottom; } // Remove the default `border-radius` that macOS Chrome adds. // // Details at https://github.com/twbs/bootstrap/issues/24093 button { // stylelint-disable-next-line property-blacklist border-radius: 0; } // Work around a Firefox/IE bug where the transparent `button` background // results in a loss of the default `button` focus styles. // // Credit: https://github.com/suitcss/base/ button:focus { outline: 1px dotted; outline: 5px auto -webkit-focus-ring-color; } // 1. Remove the margin in Firefox and Safari input, button, select, optgroup, textarea { margin: 0; font-family: inherit; @include font-size(inherit); line-height: inherit; } // Show the overflow in Edge button, input { overflow: visible; } // Remove the inheritance of text transform in Firefox button, select { text-transform: none; } // Remove the inheritance of word-wrap in Safari. // // Details at https://github.com/twbs/bootstrap/issues/24990 select { word-wrap: normal; } // Remove the dropdown arrow in Chrome from inputs built with datalists. // // Source: https://stackoverflow.com/a/54997118 [list]::-webkit-calendar-picker-indicator { display: none; } // 1. Prevent a WebKit bug where (2) destroys native `audio` and `video` // controls in Android 4. // 2. Correct the inability to style clickable types in iOS and Safari. // 3. Opinionated: add "hand" cursor to non-disabled button elements. button, [type="button"], // 1 [type="reset"], [type="submit"] { -webkit-appearance: button; // 2 @if $enable-pointer-cursor-for-buttons { &:not(:disabled) { cursor: pointer; // 3 } } } // Remove inner border and padding from Firefox, but don't restore the outline like Normalize. ::-moz-focus-inner { padding: 0; border-style: none; } // Remove the default appearance of temporal inputs to avoid a Mobile Safari // bug where setting a custom line-height prevents text from being vertically // centered within the input. // See https://bugs.webkit.org/show_bug.cgi?id=139848 // and https://github.com/twbs/bootstrap/issues/11266 input[type="date"], input[type="time"], input[type="datetime-local"], input[type="month"] { -webkit-appearance: textfield; } // 1. Remove the default vertical scrollbar in IE. // 2. Textareas should really only resize vertically so they don't break their (horizontal) containers. // 3. Use the same borders as textfields textarea { overflow: auto; // 1 resize: vertical; // 2 -webkit-appearance: textfield; // 3 } // 1. Browsers set a default `min-width: min-content;` on fieldsets, // unlike e.g. `

`s, which have `min-width: 0;` by default. // So we reset that to ensure fieldsets behave more like a standard block element. // See https://github.com/twbs/bootstrap/issues/12359 // and https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements // 2. Reset the default outline behavior of fieldsets so they don't affect page layout. fieldset { min-width: 0; // 1 padding: 0; // 2 margin: 0; // 2 border: 0; // 2 } // 1. By using `float: left`, the legend will behave like a block element // 2. Correct the color inheritance from `fieldset` elements in IE. // 3. Correct the text wrapping in Edge and IE. legend { float: left; // 1 width: 100%; padding: 0; margin-bottom: $legend-margin-bottom; @include font-size($legend-font-size); font-weight: $legend-font-weight; line-height: inherit; color: inherit; // 2 white-space: normal; // 3 } mark { padding: $mark-padding; background-color: $mark-bg; } // Add the correct vertical alignment in Chrome, Firefox, and Opera. progress { vertical-align: baseline; } // Fix height of inputs with a type of datetime-local, date, month, week, or time // See https://github.com/twbs/bootstrap/issues/18842 ::-webkit-datetime-edit { overflow: visible; line-height: 0; } // 1. Correct the outline style in Safari. // 2. This overrides the extra rounded corners on search inputs in iOS so that our // `.form-control` class can properly style them. Note that this cannot simply // be added to `.form-control` as it's not specific enough. For details, see // https://github.com/twbs/bootstrap/issues/11586. [type="search"] { outline-offset: -2px; // 1 -webkit-appearance: textfield; // 2 } // Remove the inner padding in Chrome and Safari on macOS. ::-webkit-search-decoration { -webkit-appearance: none; } // Remove padding around color pickers in webkit browsers ::-webkit-color-swatch-wrapper { padding: 0; } // 1. Change font properties to `inherit` in Safari. // 2. Correct the inability to style clickable types in iOS and Safari. ::-webkit-file-upload-button { font: inherit; // 1 -webkit-appearance: button; // 2 } // Correct element displays output { display: inline-block; } // 1. Add the correct display in all browsers summary { display: list-item; // 1 cursor: pointer; } // Add the correct display for template & main in IE 11 template { display: none; } main { display: block; } // Always hide an element with the `hidden` HTML attribute. [hidden] { display: none !important; }