` all receive top and bottom margins. We nuke the top\n// margin for easier control within type scales as it avoids margin collapsing.\n\n%heading {\n margin-top: 0; // 1\n margin-bottom: $headings-margin-bottom;\n font-family: $headings-font-family;\n font-style: $headings-font-style;\n font-weight: $headings-font-weight;\n line-height: $headings-line-height;\n color: $headings-color;\n}\n\nh1 {\n @extend %heading;\n @include font-size($h1-font-size);\n}\n\nh2 {\n @extend %heading;\n @include font-size($h2-font-size);\n}\n\nh3 {\n @extend %heading;\n @include font-size($h3-font-size);\n}\n\nh4 {\n @extend %heading;\n @include font-size($h4-font-size);\n}\n\nh5 {\n @extend %heading;\n @include font-size($h5-font-size);\n}\n\nh6 {\n @extend %heading;\n @include font-size($h6-font-size);\n}\n\n\n// Reset margins on paragraphs\n//\n// Similarly, the top margin on `
`s get reset. However, we also reset the\n// bottom margin to use `rem` units instead of `em`.\n\np {\n margin-top: 0;\n margin-bottom: $paragraph-margin-bottom;\n}\n\n\n// Abbreviations\n//\n// 1. Duplicate behavior to the data-* attribute for our tooltip plugin\n// 2. Add the correct text decoration in Chrome, Edge, Opera, and Safari.\n// 3. Add explicit cursor to indicate changed behavior.\n// 4. Prevent the text-decoration to be skipped.\n\nabbr[title],\nabbr[data-original-title] { // 1\n text-decoration: underline; // 2\n text-decoration: underline dotted; // 2\n cursor: help; // 3\n text-decoration-skip-ink: none; // 4\n}\n\n\n// Address\n\naddress {\n margin-bottom: 1rem;\n font-style: normal;\n line-height: inherit;\n}\n\n\n// Lists\n\nol,\nul {\n padding-left: 2rem;\n}\n\nol,\nul,\ndl {\n margin-top: 0;\n margin-bottom: 1rem;\n}\n\nol ol,\nul ul,\nol ul,\nul ol {\n margin-bottom: 0;\n}\n\ndt {\n font-weight: $dt-font-weight;\n}\n\n// 1. Undo browser default\n\ndd {\n margin-bottom: .5rem;\n margin-left: 0; // 1\n}\n\n\n// Blockquote\n\nblockquote {\n margin: 0 0 1rem;\n}\n\n\n// Strong\n//\n// Add the correct font weight in Chrome, Edge, and Safari\n\nb,\nstrong {\n font-weight: $font-weight-bolder;\n}\n\n\n// Small\n//\n// Add the correct font size in all browsers\n\nsmall {\n @include font-size($small-font-size);\n}\n\n\n// Mark\n\nmark {\n padding: $mark-padding;\n background-color: $mark-bg;\n}\n\n\n// Sub and Sup\n//\n// Prevent `sub` and `sup` elements from affecting the line height in\n// all browsers.\n\nsub,\nsup {\n position: relative;\n @include font-size($sub-sup-font-size);\n line-height: 0;\n vertical-align: baseline;\n}\n\nsub { bottom: -.25em; }\nsup { top: -.5em; }\n\n\n// Links\n\na {\n color: $link-color;\n text-decoration: $link-decoration;\n\n &:hover {\n color: $link-hover-color;\n text-decoration: $link-hover-decoration;\n }\n}\n\n// And undo these styles for placeholder links/named anchors (without href).\n// It would be more straightforward to just use a[href] in previous block, but that\n// causes specificity issues in many other styles that are too complex to fix.\n// See https://github.com/twbs/bootstrap/issues/19402\n\na:not([href]):not([class]) {\n &,\n &:hover {\n color: inherit;\n text-decoration: none;\n }\n}\n\n\n// Code\n\npre,\ncode,\nkbd,\nsamp {\n font-family: $font-family-code;\n @include font-size(1em); // Correct the odd `em` font sizing in all browsers.\n}\n\n// 1. Remove browser default top margin\n// 2. Reset browser default of `1em` to use `rem`s\n// 3. Don't allow content to break outside\n\npre {\n display: block;\n margin-top: 0; // 1\n margin-bottom: 1rem; // 2\n overflow: auto; // 3\n @include font-size($code-font-size);\n color: $pre-color;\n\n // Account for some code outputs that place code tags in pre tags\n code {\n @include font-size(inherit);\n color: inherit;\n word-break: normal;\n }\n}\n\ncode {\n @include font-size($code-font-size);\n color: $code-color;\n word-wrap: break-word;\n\n // Streamline the style when inside anchors to avoid broken underline and more\n a > & {\n color: inherit;\n }\n}\n\nkbd {\n padding: $kbd-padding-y $kbd-padding-x;\n @include font-size($kbd-font-size);\n color: $kbd-color;\n background-color: $kbd-bg;\n @include border-radius($border-radius-sm);\n\n kbd {\n padding: 0;\n @include font-size(1em);\n font-weight: $nested-kbd-font-weight;\n }\n}\n\n\n// Figures\n//\n// Apply a consistent margin strategy (matches our type styles).\n\nfigure {\n margin: 0 0 1rem;\n}\n\n\n// Images and content\n\nimg,\nsvg {\n vertical-align: middle;\n}\n\n\n// Tables\n//\n// Prevent double borders\n\ntable {\n caption-side: bottom;\n border-collapse: collapse;\n}\n\ncaption {\n padding-top: $table-cell-padding-y;\n padding-bottom: $table-cell-padding-y;\n color: $table-caption-color;\n text-align: left;\n}\n\n// 1. Removes font-weight bold by inheriting\n// 2. Matches default `
` alignment by inheriting `text-align`.\n// 3. Fix alignment for Safari\n\nth {\n font-weight: $table-th-font-weight; // 1\n text-align: inherit; // 2\n text-align: -webkit-match-parent; // 3\n}\n\nthead,\ntbody,\ntfoot,\ntr,\ntd,\nth {\n border-color: inherit;\n border-style: solid;\n border-width: 0;\n}\n\n\n// Forms\n//\n// 1. Allow labels to use `margin` for spacing.\n\nlabel {\n display: inline-block; // 1\n}\n\n// Remove the default `border-radius` that macOS Chrome adds.\n// See https://github.com/twbs/bootstrap/issues/24093\n\nbutton {\n // stylelint-disable-next-line property-disallowed-list\n border-radius: 0;\n}\n\n// Work around a Firefox bug where the transparent `button` background\n// results in a loss of the default `button` focus styles.\n// Credit https://github.com/suitcss/base/\n\nbutton:focus {\n outline: dotted 1px;\n outline: -webkit-focus-ring-color auto 5px;\n}\n\n// 1. Remove the margin in Firefox and Safari\n\ninput,\nbutton,\nselect,\noptgroup,\ntextarea {\n margin: 0; // 1\n font-family: inherit;\n @include font-size(inherit);\n line-height: inherit;\n}\n\n// Remove the inheritance of text transform in Firefox\n\nbutton,\nselect {\n text-transform: none;\n}\n\n// Set the cursor for non-`