1 | // stylelint-disable at-rule-no-vendor-prefix, declaration-no-important, selector-no-qualifying-type, property-no-vendor-prefix
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2 |
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3 | // Reboot
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4 | //
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5 | // Normalization of HTML elements, manually forked from Normalize.css to remove
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6 | // styles targeting irrelevant browsers while applying new styles.
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7 | //
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8 | // Normalize is licensed MIT. https://github.com/necolas/normalize.css
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9 |
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10 |
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11 | // Document
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12 | //
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13 | // 1. Change from `box-sizing: content-box` so that `width` is not affected by `padding` or `border`.
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14 | // 2. Change the default font family in all browsers.
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15 | // 3. Correct the line height in all browsers.
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16 | // 4. Prevent adjustments of font size after orientation changes in IE on Windows Phone and in iOS.
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17 | // 5. Change the default tap highlight to be completely transparent in iOS.
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18 |
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19 | *,
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20 | *::before,
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21 | *::after {
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22 | box-sizing: border-box; // 1
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23 | }
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24 |
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25 | html {
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26 | font-family: sans-serif; // 2
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27 | line-height: 1.15; // 3
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28 | -webkit-text-size-adjust: 100%; // 4
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29 | -webkit-tap-highlight-color: rgba($black, 0); // 5
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30 | }
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31 |
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32 | // Shim for "new" HTML5 structural elements to display correctly (IE10, older browsers)
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33 | // TODO: remove in v5
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34 | // stylelint-disable-next-line selector-list-comma-newline-after
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35 | article, aside, figcaption, figure, footer, header, hgroup, main, nav, section {
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36 | display: block;
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37 | }
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38 |
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39 | // Body
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40 | //
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41 | // 1. Remove the margin in all browsers.
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42 | // 2. As a best practice, apply a default `background-color`.
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43 | // 3. Set an explicit initial text-align value so that we can later use
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44 | // the `inherit` value on things like `<th>` elements.
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45 |
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46 | body {
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47 | margin: 0; // 1
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48 | font-family: $font-family-base;
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49 | @include font-size($font-size-base);
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50 | font-weight: $font-weight-base;
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51 | line-height: $line-height-base;
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52 | color: $body-color;
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53 | text-align: left; // 3
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54 | background-color: $body-bg; // 2
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55 | }
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56 |
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57 | // Future-proof rule: in browsers that support :focus-visible, suppress the focus outline
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58 | // on elements that programmatically receive focus but wouldn't normally show a visible
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59 | // focus outline. In general, this would mean that the outline is only applied if the
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60 | // interaction that led to the element receiving programmatic focus was a keyboard interaction,
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61 | // or the browser has somehow determined that the user is primarily a keyboard user and/or
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62 | // wants focus outlines to always be presented.
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63 | //
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64 | // See https://developer.mozilla.org/en-US/docs/Web/CSS/:focus-visible
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65 | // and https://developer.paciellogroup.com/blog/2018/03/focus-visible-and-backwards-compatibility/
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66 | [tabindex="-1"]:focus:not(:focus-visible) {
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67 | outline: 0 ;
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68 | }
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69 |
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70 |
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71 | // Content grouping
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72 | //
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73 | // 1. Add the correct box sizing in Firefox.
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74 | // 2. Show the overflow in Edge and IE.
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75 |
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76 | hr {
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77 | box-sizing: content-box; // 1
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78 | height: 0; // 1
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79 | overflow: visible; // 2
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80 | }
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81 |
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82 |
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83 | //
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84 | // Typography
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85 | //
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86 |
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87 | // Remove top margins from headings
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88 | //
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89 | // By default, `<h1>`-`<h6>` all receive top and bottom margins. We nuke the top
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90 | // margin for easier control within type scales as it avoids margin collapsing.
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91 | // stylelint-disable-next-line selector-list-comma-newline-after
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92 | h1, h2, h3, h4, h5, h6 {
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93 | margin-top: 0;
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94 | margin-bottom: $headings-margin-bottom;
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95 | }
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96 |
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97 | // Reset margins on paragraphs
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98 | //
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99 | // Similarly, the top margin on `<p>`s get reset. However, we also reset the
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100 | // bottom margin to use `rem` units instead of `em`.
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101 | p {
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102 | margin-top: 0;
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103 | margin-bottom: $paragraph-margin-bottom;
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104 | }
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105 |
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106 | // Abbreviations
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107 | //
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108 | // 1. Duplicate behavior to the data-* attribute for our tooltip plugin
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109 | // 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
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110 | // 3. Add explicit cursor to indicate changed behavior.
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111 | // 4. Remove the bottom border in Firefox 39-.
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112 | // 5. Prevent the text-decoration to be skipped.
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113 |
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114 | abbr[title],
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115 | abbr[data-original-title] { // 1
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116 | text-decoration: underline; // 2
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117 | text-decoration: underline dotted; // 2
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118 | cursor: help; // 3
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119 | border-bottom: 0; // 4
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120 | text-decoration-skip-ink: none; // 5
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121 | }
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122 |
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123 | address {
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124 | margin-bottom: 1rem;
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125 | font-style: normal;
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126 | line-height: inherit;
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127 | }
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128 |
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129 | ol,
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130 | ul,
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131 | dl {
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132 | margin-top: 0;
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133 | margin-bottom: 1rem;
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134 | }
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135 |
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136 | ol ol,
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137 | ul ul,
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138 | ol ul,
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139 | ul ol {
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140 | margin-bottom: 0;
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141 | }
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142 |
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143 | dt {
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144 | font-weight: $dt-font-weight;
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145 | }
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146 |
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147 | dd {
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148 | margin-bottom: .5rem;
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149 | margin-left: 0; // Undo browser default
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150 | }
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151 |
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152 | blockquote {
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153 | margin: 0 0 1rem;
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154 | }
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155 |
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156 | b,
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157 | strong {
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158 | font-weight: $font-weight-bolder; // Add the correct font weight in Chrome, Edge, and Safari
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159 | }
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160 |
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161 | small {
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162 | @include font-size(80%); // Add the correct font size in all browsers
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163 | }
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164 |
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165 | //
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166 | // Prevent `sub` and `sup` elements from affecting the line height in
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167 | // all browsers.
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168 | //
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169 |
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170 | sub,
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171 | sup {
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172 | position: relative;
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173 | @include font-size(75%);
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174 | line-height: 0;
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175 | vertical-align: baseline;
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176 | }
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177 |
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178 | sub { bottom: -.25em; }
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179 | sup { top: -.5em; }
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180 |
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181 |
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182 | //
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183 | // Links
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184 | //
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185 |
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186 | a {
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187 | color: $link-color;
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188 | text-decoration: $link-decoration;
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189 | background-color: transparent; // Remove the gray background on active links in IE 10.
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190 |
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191 | @include hover() {
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192 | color: $link-hover-color;
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193 | text-decoration: $link-hover-decoration;
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194 | }
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195 | }
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196 |
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197 | // And undo these styles for placeholder links/named anchors (without href).
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198 | // It would be more straightforward to just use a[href] in previous block, but that
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199 | // causes specificity issues in many other styles that are too complex to fix.
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200 | // See https://github.com/twbs/bootstrap/issues/19402
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201 |
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202 | a:not([href]) {
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203 | color: inherit;
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204 | text-decoration: none;
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205 |
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206 | @include hover() {
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207 | color: inherit;
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208 | text-decoration: none;
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209 | }
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210 | }
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211 |
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212 |
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213 | //
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214 | // Code
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215 | //
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216 |
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217 | pre,
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218 | code,
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219 | kbd,
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220 | samp {
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221 | font-family: $font-family-monospace;
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222 | @include font-size(1em); // Correct the odd `em` font sizing in all browsers.
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223 | }
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224 |
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225 | pre {
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226 | // Remove browser default top margin
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227 | margin-top: 0;
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228 | // Reset browser default of `1em` to use `rem`s
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229 | margin-bottom: 1rem;
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230 | // Don't allow content to break outside
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231 | overflow: auto;
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232 | // Disable auto-hiding scrollbar in IE & legacy Edge to avoid overlap,
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233 | // making it impossible to interact with the content
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234 | -ms-overflow-style: scrollbar;
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235 | }
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236 |
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237 |
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238 | //
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239 | // Figures
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240 | //
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241 |
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242 | figure {
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243 | // Apply a consistent margin strategy (matches our type styles).
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244 | margin: 0 0 1rem;
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245 | }
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246 |
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247 |
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248 | //
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249 | // Images and content
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250 | //
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251 |
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252 | img {
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253 | vertical-align: middle;
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254 | border-style: none; // Remove the border on images inside links in IE 10-.
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255 | }
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256 |
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257 | svg {
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258 | // Workaround for the SVG overflow bug in IE10/11 is still required.
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259 | // See https://github.com/twbs/bootstrap/issues/26878
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260 | overflow: hidden;
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261 | vertical-align: middle;
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262 | }
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263 |
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264 |
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265 | //
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266 | // Tables
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267 | //
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268 |
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269 | table {
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270 | border-collapse: collapse; // Prevent double borders
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271 | }
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272 |
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273 | caption {
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274 | padding-top: $table-cell-padding;
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275 | padding-bottom: $table-cell-padding;
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276 | color: $table-caption-color;
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277 | text-align: left;
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278 | caption-side: bottom;
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279 | }
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280 |
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281 | th {
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282 | // Matches default `<td>` alignment by inheriting from the `<body>`, or the
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283 | // closest parent with a set `text-align`.
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284 | text-align: inherit;
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285 | }
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286 |
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287 |
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288 | //
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289 | // Forms
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290 | //
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291 |
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292 | label {
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293 | // Allow labels to use `margin` for spacing.
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294 | display: inline-block;
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295 | margin-bottom: $label-margin-bottom;
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296 | }
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297 |
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298 | // Remove the default `border-radius` that macOS Chrome adds.
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299 | //
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300 | // Details at https://github.com/twbs/bootstrap/issues/24093
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301 | button {
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302 | // stylelint-disable-next-line property-blacklist
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303 | border-radius: 0;
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304 | }
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305 |
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306 | // Work around a Firefox/IE bug where the transparent `button` background
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307 | // results in a loss of the default `button` focus styles.
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308 | //
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309 | // Credit: https://github.com/suitcss/base/
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310 | button:focus {
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311 | outline: 1px dotted;
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312 | outline: 5px auto -webkit-focus-ring-color;
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313 | }
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314 |
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315 | input,
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316 | button,
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317 | select,
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318 | optgroup,
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319 | textarea {
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320 | margin: 0; // Remove the margin in Firefox and Safari
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321 | font-family: inherit;
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322 | @include font-size(inherit);
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323 | line-height: inherit;
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324 | }
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325 |
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326 | button,
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327 | input {
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328 | overflow: visible; // Show the overflow in Edge
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329 | }
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330 |
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331 | button,
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332 | select {
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333 | text-transform: none; // Remove the inheritance of text transform in Firefox
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334 | }
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335 |
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336 | // Set the cursor for non-`<button>` buttons
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337 | //
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338 | // Details at https://github.com/twbs/bootstrap/pull/30562
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339 | [role="button"] {
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340 | cursor: pointer;
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341 | }
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342 |
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343 | // Remove the inheritance of word-wrap in Safari.
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344 | //
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345 | // Details at https://github.com/twbs/bootstrap/issues/24990
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346 | select {
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347 | word-wrap: normal;
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348 | }
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349 |
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350 |
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351 | // 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
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352 | // controls in Android 4.
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353 | // 2. Correct the inability to style clickable types in iOS and Safari.
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354 | button,
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355 | [type="button"], // 1
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356 | [type="reset"],
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357 | [type="submit"] {
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358 | -webkit-appearance: button; // 2
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359 | }
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360 |
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361 | // Opinionated: add "hand" cursor to non-disabled button elements.
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362 | @if $enable-pointer-cursor-for-buttons {
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363 | button,
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364 | [type="button"],
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365 | [type="reset"],
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366 | [type="submit"] {
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367 | &:not(:disabled) {
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368 | cursor: pointer;
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369 | }
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370 | }
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371 | }
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372 |
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373 | // Remove inner border and padding from Firefox, but don't restore the outline like Normalize.
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374 | button::-moz-focus-inner,
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375 | [type="button"]::-moz-focus-inner,
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376 | [type="reset"]::-moz-focus-inner,
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377 | [type="submit"]::-moz-focus-inner {
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378 | padding: 0;
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379 | border-style: none;
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380 | }
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381 |
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382 | input[type="radio"],
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383 | input[type="checkbox"] {
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384 | box-sizing: border-box; // 1. Add the correct box sizing in IE 10-
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385 | padding: 0; // 2. Remove the padding in IE 10-
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386 | }
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387 |
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388 |
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389 | textarea {
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390 | overflow: auto; // Remove the default vertical scrollbar in IE.
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391 | // Textareas should really only resize vertically so they don't break their (horizontal) containers.
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392 | resize: vertical;
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393 | }
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394 |
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395 | fieldset {
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396 | // Browsers set a default `min-width: min-content;` on fieldsets,
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397 | // unlike e.g. `<div>`s, which have `min-width: 0;` by default.
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398 | // So we reset that to ensure fieldsets behave more like a standard block element.
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399 | // See https://github.com/twbs/bootstrap/issues/12359
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400 | // and https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements
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401 | min-width: 0;
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402 | // Reset the default outline behavior of fieldsets so they don't affect page layout.
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403 | padding: 0;
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404 | margin: 0;
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405 | border: 0;
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406 | }
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407 |
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408 | // 1. Correct the text wrapping in Edge and IE.
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409 | // 2. Correct the color inheritance from `fieldset` elements in IE.
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410 | legend {
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411 | display: block;
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412 | width: 100%;
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413 | max-width: 100%; // 1
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414 | padding: 0;
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415 | margin-bottom: .5rem;
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416 | @include font-size(1.5rem);
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417 | line-height: inherit;
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418 | color: inherit; // 2
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419 | white-space: normal; // 1
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420 | }
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421 |
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422 | progress {
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423 | vertical-align: baseline; // Add the correct vertical alignment in Chrome, Firefox, and Opera.
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424 | }
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425 |
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426 | // Correct the cursor style of increment and decrement buttons in Chrome.
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427 | [type="number"]::-webkit-inner-spin-button,
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428 | [type="number"]::-webkit-outer-spin-button {
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429 | height: auto;
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430 | }
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431 |
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432 | [type="search"] {
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433 | // This overrides the extra rounded corners on search inputs in iOS so that our
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434 | // `.form-control` class can properly style them. Note that this cannot simply
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435 | // be added to `.form-control` as it's not specific enough. For details, see
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436 | // https://github.com/twbs/bootstrap/issues/11586.
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437 | outline-offset: -2px; // 2. Correct the outline style in Safari.
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438 | -webkit-appearance: none;
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439 | }
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440 |
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441 | //
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442 | // Remove the inner padding in Chrome and Safari on macOS.
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443 | //
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444 |
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445 | [type="search"]::-webkit-search-decoration {
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446 | -webkit-appearance: none;
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447 | }
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448 |
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449 | //
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450 | // 1. Correct the inability to style clickable types in iOS and Safari.
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451 | // 2. Change font properties to `inherit` in Safari.
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452 | //
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453 |
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454 | ::-webkit-file-upload-button {
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455 | font: inherit; // 2
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456 | -webkit-appearance: button; // 1
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457 | }
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458 |
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459 | //
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460 | // Correct element displays
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461 | //
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462 |
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463 | output {
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464 | display: inline-block;
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465 | }
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466 |
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467 | summary {
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468 | display: list-item; // Add the correct display in all browsers
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469 | cursor: pointer;
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470 | }
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471 |
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472 | template {
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473 | display: none; // Add the correct display in IE
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474 | }
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475 |
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476 | // Always hide an element with the `hidden` HTML attribute (from PureCSS).
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477 | // Needed for proper display in IE 10-.
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478 | [hidden] {
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479 | display: none ;
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480 | }
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