1 // stylelint-disable declaration-no-important, selector-no-qualifying-type, property-no-vendor-prefix
5 // Normalization of HTML elements, manually forked from Normalize.css to remove
6 // styles targeting irrelevant browsers while applying new styles.
8 // Normalize is licensed MIT. https://github.com/necolas/normalize.css
13 // 1. Change from `box-sizing: content-box` so that `width` is not affected by `padding` or `border`.
14 // 2. Change the default font family in all browsers.
15 // 3. Correct the line height in all browsers.
16 // 4. Prevent adjustments of font size after orientation changes in IE on Windows Phone and in iOS.
17 // 5. Change the default tap highlight to be completely transparent in iOS.
22 box-sizing: border-box; // 1
26 font-family: sans-serif; // 2
27 line-height: 1.15; // 3
28 -webkit-text-size-adjust: 100%; // 4
29 -webkit-tap-highlight-color: rgba($black, 0); // 5
32 // Shim for "new" HTML5 structural elements to display correctly (IE10, older browsers)
34 // stylelint-disable-next-line selector-list-comma-newline-after
35 article, aside, figcaption, figure, footer, header, hgroup, main, nav, section {
41 // 1. Remove the margin in all browsers.
42 // 2. As a best practice, apply a default `background-color`.
43 // 3. Set an explicit initial text-align value so that we can later use
44 // the `inherit` value on things like `<th>` elements.
48 font-family: $font-family-base;
49 @include font-size($font-size-base);
50 font-weight: $font-weight-base;
51 line-height: $line-height-base;
53 text-align: left; // 3
54 background-color: $body-bg; // 2
57 // Future-proof rule: in browsers that support :focus-visible, suppress the focus outline
58 // on elements that programmatically receive focus but wouldn't normally show a visible
59 // focus outline. In general, this would mean that the outline is only applied if the
60 // interaction that led to the element receiving programmatic focus was a keyboard interaction,
61 // or the browser has somehow determined that the user is primarily a keyboard user and/or
62 // wants focus outlines to always be presented.
64 // See https://developer.mozilla.org/en-US/docs/Web/CSS/:focus-visible
65 // and https://developer.paciellogroup.com/blog/2018/03/focus-visible-and-backwards-compatibility/
66 [tabindex="-1"]:focus:not(:focus-visible) {
67 outline: 0 !important;
73 // 1. Add the correct box sizing in Firefox.
74 // 2. Show the overflow in Edge and IE.
77 box-sizing: content-box; // 1
79 overflow: visible; // 2
87 // Remove top margins from headings
89 // By default, `<h1>`-`<h6>` all receive top and bottom margins. We nuke the top
90 // margin for easier control within type scales as it avoids margin collapsing.
91 // stylelint-disable-next-line selector-list-comma-newline-after
92 h1, h2, h3, h4, h5, h6 {
94 margin-bottom: $headings-margin-bottom;
97 // Reset margins on paragraphs
99 // Similarly, the top margin on `<p>`s get reset. However, we also reset the
100 // bottom margin to use `rem` units instead of `em`.
103 margin-bottom: $paragraph-margin-bottom;
108 // 1. Duplicate behavior to the data-* attribute for our tooltip plugin
109 // 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
110 // 3. Add explicit cursor to indicate changed behavior.
111 // 4. Remove the bottom border in Firefox 39-.
112 // 5. Prevent the text-decoration to be skipped.
115 abbr[data-original-title] { // 1
116 text-decoration: underline; // 2
117 text-decoration: underline dotted; // 2
119 border-bottom: 0; // 4
120 text-decoration-skip-ink: none; // 5
126 line-height: inherit;
144 font-weight: $dt-font-weight;
148 margin-bottom: .5rem;
149 margin-left: 0; // Undo browser default
158 font-weight: $font-weight-bolder; // Add the correct font weight in Chrome, Edge, and Safari
162 @include font-size(80%); // Add the correct font size in all browsers
166 // Prevent `sub` and `sup` elements from affecting the line height in
173 @include font-size(75%);
175 vertical-align: baseline;
178 sub { bottom: -.25em; }
188 text-decoration: $link-decoration;
189 background-color: transparent; // Remove the gray background on active links in IE 10.
192 color: $link-hover-color;
193 text-decoration: $link-hover-decoration;
197 // And undo these styles for placeholder links/named anchors (without href).
198 // It would be more straightforward to just use a[href] in previous block, but that
199 // causes specificity issues in many other styles that are too complex to fix.
200 // See https://github.com/twbs/bootstrap/issues/19402
202 a:not([href]):not([class]) {
204 text-decoration: none;
208 text-decoration: none;
221 font-family: $font-family-monospace;
222 @include font-size(1em); // Correct the odd `em` font sizing in all browsers.
226 // Remove browser default top margin
228 // Reset browser default of `1em` to use `rem`s
230 // Don't allow content to break outside
232 // Disable auto-hiding scrollbar in IE & legacy Edge to avoid overlap,
233 // making it impossible to interact with the content
234 -ms-overflow-style: scrollbar;
243 // Apply a consistent margin strategy (matches our type styles).
249 // Images and content
253 vertical-align: middle;
254 border-style: none; // Remove the border on images inside links in IE 10-.
258 // Workaround for the SVG overflow bug in IE10/11 is still required.
259 // See https://github.com/twbs/bootstrap/issues/26878
261 vertical-align: middle;
270 border-collapse: collapse; // Prevent double borders
274 padding-top: $table-cell-padding;
275 padding-bottom: $table-cell-padding;
276 color: $table-caption-color;
278 caption-side: bottom;
281 // 1. Removes font-weight bold by inheriting
282 // 2. Matches default `<td>` alignment by inheriting `text-align`.
283 // 3. Fix alignment for Safari
286 font-weight: $table-th-font-weight; // 1
287 text-align: inherit; // 2
288 text-align: -webkit-match-parent; // 3
297 // Allow labels to use `margin` for spacing.
298 display: inline-block;
299 margin-bottom: $label-margin-bottom;
302 // Remove the default `border-radius` that macOS Chrome adds.
304 // Details at https://github.com/twbs/bootstrap/issues/24093
306 // stylelint-disable-next-line property-disallowed-list
310 // Work around a Firefox/IE bug where the transparent `button` background
311 // results in a loss of the default `button` focus styles.
313 // Credit: https://github.com/suitcss/base/
316 outline: -webkit-focus-ring-color auto 5px;
324 margin: 0; // Remove the margin in Firefox and Safari
325 font-family: inherit;
326 @include font-size(inherit);
327 line-height: inherit;
332 overflow: visible; // Show the overflow in Edge
337 text-transform: none; // Remove the inheritance of text transform in Firefox
340 // Set the cursor for non-`<button>` buttons
342 // Details at https://github.com/twbs/bootstrap/pull/30562
347 // Remove the inheritance of word-wrap in Safari.
349 // Details at https://github.com/twbs/bootstrap/issues/24990
355 // 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
356 // controls in Android 4.
357 // 2. Correct the inability to style clickable types in iOS and Safari.
359 [type="button"], // 1
362 -webkit-appearance: button; // 2
365 // Opinionated: add "hand" cursor to non-disabled button elements.
366 @if $enable-pointer-cursor-for-buttons {
377 // Remove inner border and padding from Firefox, but don't restore the outline like Normalize.
378 button::-moz-focus-inner,
379 [type="button"]::-moz-focus-inner,
380 [type="reset"]::-moz-focus-inner,
381 [type="submit"]::-moz-focus-inner {
387 input[type="checkbox"] {
388 box-sizing: border-box; // 1. Add the correct box sizing in IE 10-
389 padding: 0; // 2. Remove the padding in IE 10-
394 overflow: auto; // Remove the default vertical scrollbar in IE.
395 // Textareas should really only resize vertically so they don't break their (horizontal) containers.
400 // Browsers set a default `min-width: min-content;` on fieldsets,
401 // unlike e.g. `<div>`s, which have `min-width: 0;` by default.
402 // So we reset that to ensure fieldsets behave more like a standard block element.
403 // See https://github.com/twbs/bootstrap/issues/12359
404 // and https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements
406 // Reset the default outline behavior of fieldsets so they don't affect page layout.
412 // 1. Correct the text wrapping in Edge and IE.
413 // 2. Correct the color inheritance from `fieldset` elements in IE.
417 max-width: 100%; // 1
419 margin-bottom: .5rem;
420 @include font-size(1.5rem);
421 line-height: inherit;
423 white-space: normal; // 1
427 vertical-align: baseline; // Add the correct vertical alignment in Chrome, Firefox, and Opera.
430 // Correct the cursor style of increment and decrement buttons in Chrome.
431 [type="number"]::-webkit-inner-spin-button,
432 [type="number"]::-webkit-outer-spin-button {
437 // This overrides the extra rounded corners on search inputs in iOS so that our
438 // `.form-control` class can properly style them. Note that this cannot simply
439 // be added to `.form-control` as it's not specific enough. For details, see
440 // https://github.com/twbs/bootstrap/issues/11586.
441 outline-offset: -2px; // 2. Correct the outline style in Safari.
442 -webkit-appearance: none;
446 // Remove the inner padding in Chrome and Safari on macOS.
449 [type="search"]::-webkit-search-decoration {
450 -webkit-appearance: none;
454 // 1. Correct the inability to style clickable types in iOS and Safari.
455 // 2. Change font properties to `inherit` in Safari.
458 ::-webkit-file-upload-button {
460 -webkit-appearance: button; // 1
464 // Correct element displays
468 display: inline-block;
472 display: list-item; // Add the correct display in all browsers
477 display: none; // Add the correct display in IE
480 // Always hide an element with the `hidden` HTML attribute (from PureCSS).
481 // Needed for proper display in IE 10-.
483 display: none !important;