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1 // scss-lint:disable QualifyingElement, DuplicateProperty, VendorPrefix
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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. Setting @viewport causes scrollbars to overlap content in IE11 and Edge, so
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18 // we force a non-overlapping, non-auto-hiding scrollbar to counteract.
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19 // 6. Change the default tap highlight to be completely transparent in iOS.
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20
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21 html {
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22 box-sizing: border-box; // 1
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23 font-family: sans-serif; // 2
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24 line-height: 1.15; // 3
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25 -webkit-text-size-adjust: 100%; // 4
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26 -ms-text-size-adjust: 100%; // 4
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27 -ms-overflow-style: scrollbar; // 5
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28 -webkit-tap-highlight-color: rgba(0,0,0,0); // 6
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29 }
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30
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31 *,
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32 *::before,
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33 *::after {
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34 box-sizing: inherit; // 1
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35 }
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36
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37 // IE10+ doesn't honor `<meta name="viewport">` in some cases.
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38 @at-root {
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39 @-ms-viewport { width: device-width; }
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40 }
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41
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42 // Shim for "new" HTML5 structural elements to display correctly (IE10, older browsers)
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43 article, aside, dialog, figcaption, figure, footer, header, hgroup, main, nav, section {
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44 display: block;
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45 }
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46
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47 // Body
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48 //
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49 // 1. Remove the margin in all browsers.
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50 // 2. As a best practice, apply a default `background-color`.
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51
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52 body {
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53 margin: 0; // 1
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54 font-family: $font-family-base;
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55 font-size: $font-size-base;
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56 font-weight: $font-weight-base;
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57 line-height: $line-height-base;
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58 color: $body-color;
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59 background-color: $body-bg; // 2
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60 }
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61
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62 // Suppress the focus outline on elements that cannot be accessed via keyboard.
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63 // This prevents an unwanted focus outline from appearing around elements that
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64 // might still respond to pointer events.
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65 //
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66 // Credit: https://github.com/suitcss/base
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67 [tabindex="-1"]:focus {
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68 outline: none !important;
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69 }
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70
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71
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72 // Content grouping
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73 //
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74 // 1. Add the correct box sizing in Firefox.
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75 // 2. Show the overflow in Edge and IE.
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76
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77 hr {
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78 box-sizing: content-box; // 1
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79 height: 0; // 1
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80 overflow: visible; // 2
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81 }
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82
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83
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84 //
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85 // Typography
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86 //
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87
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88 // Remove top margins from headings
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89 //
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90 // By default, `<h1>`-`<h6>` all receive top and bottom margins. We nuke the top
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91 // margin for easier control within type scales as it avoids margin collapsing.
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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: .5rem;
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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: 1rem;
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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. Remove the bottom border in Firefox 39-.
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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. Duplicate behavior to the data-* attribute for our tooltip plugin
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112
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113 abbr[title],
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114 abbr[data-original-title] { // 4
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115 text-decoration: underline; // 2
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116 text-decoration: underline dotted; // 2
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117 cursor: help; // 3
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118 border-bottom: 0; // 1
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119 }
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120
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121 address {
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122 margin-bottom: 1rem;
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123 font-style: normal;
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124 line-height: inherit;
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125 }
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126
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127 ol,
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128 ul,
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129 dl {
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130 margin-top: 0;
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131 margin-bottom: 1rem;
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132 }
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133
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134 ol ol,
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135 ul ul,
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136 ol ul,
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137 ul ol {
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138 margin-bottom: 0;
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139 }
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140
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141 dt {
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142 font-weight: $dt-font-weight;
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143 }
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144
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145 dd {
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146 margin-bottom: .5rem;
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147 margin-left: 0; // Undo browser default
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148 }
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149
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150 blockquote {
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151 margin: 0 0 1rem;
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152 }
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153
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154 dfn {
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155 font-style: italic; // Add the correct font style in Android 4.3-
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156 }
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157
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158 b,
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159 strong {
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160 font-weight: bolder; // Add the correct font weight in Chrome, Edge, and Safari
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161 }
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162
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163 small {
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164 font-size: 80%; // Add the correct font size in all browsers
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165 }
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166
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167 //
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168 // Prevent `sub` and `sup` elements from affecting the line height in
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169 // all browsers.
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170 //
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171
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172 sub,
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173 sup {
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174 position: relative;
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175 font-size: 75%;
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176 line-height: 0;
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177 vertical-align: baseline;
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178 }
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179
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180 sub { bottom: -.25em; }
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181 sup { top: -.5em; }
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182
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183
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184 //
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185 // Links
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186 //
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187
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188 a {
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189 color: $link-color;
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190 text-decoration: $link-decoration;
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191 background-color: transparent; // Remove the gray background on active links in IE 10.
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192 -webkit-text-decoration-skip: objects; // Remove gaps in links underline in iOS 8+ and Safari 8+.
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193
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194 @include hover {
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195 color: $link-hover-color;
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196 text-decoration: $link-hover-decoration;
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197 }
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198 }
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199
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200 // And undo these styles for placeholder links/named anchors (without href)
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201 // which have not been made explicitly keyboard-focusable (without tabindex).
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202 // It would be more straightforward to just use a[href] in previous block, but that
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203 // causes specificity issues in many other styles that are too complex to fix.
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204 // See https://github.com/twbs/bootstrap/issues/19402
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205
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206 a:not([href]):not([tabindex]) {
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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 @include hover-focus {
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211 color: inherit;
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212 text-decoration: none;
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213 }
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214
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215 &:focus {
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216 outline: 0;
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217 }
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218 }
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219
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220
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221 //
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222 // Code
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223 //
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224
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225 pre,
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226 code,
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227 kbd,
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228 samp {
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229 font-family: monospace, monospace; // Correct the inheritance and scaling of font size in all browsers.
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230 font-size: 1em; // Correct the odd `em` font sizing in all browsers.
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231 }
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232
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233 pre {
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234 // Remove browser default top margin
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235 margin-top: 0;
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236 // Reset browser default of `1em` to use `rem`s
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237 margin-bottom: 1rem;
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238 // Don't allow content to break outside
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239 overflow: auto;
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240 }
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241
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242
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243 //
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244 // Figures
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245 //
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246
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247 figure {
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248 // Apply a consistent margin strategy (matches our type styles).
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249 margin: 0 0 1rem;
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250 }
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251
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252
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253 //
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254 // Images and content
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255 //
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256
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257 img {
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258 vertical-align: middle;
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259 border-style: none; // Remove the border on images inside links in IE 10-.
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260 }
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261
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262 svg:not(:root) {
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263 overflow: hidden; // Hide the overflow in IE
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264 }
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265
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266
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267 // Avoid 300ms click delay on touch devices that support the `touch-action` CSS property.
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268 //
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269 // In particular, unlike most other browsers, IE11+Edge on Windows 10 on touch devices and IE Mobile 10-11
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270 // DON'T remove the click delay when `<meta name="viewport" content="width=device-width">` is present.
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271 // However, they DO support removing the click delay via `touch-action: manipulation`.
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272 // See:
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273 // * https://v4-alpha.getbootstrap.com/content/reboot/#click-delay-optimization-for-touch
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274 // * http://caniuse.com/#feat=css-touch-action
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275 // * https://patrickhlauke.github.io/touch/tests/results/#suppressing-300ms-delay
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276
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277 a,
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278 area,
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279 button,
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280 [role="button"],
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281 input,
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282 label,
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283 select,
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284 summary,
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285 textarea {
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286 touch-action: manipulation;
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287 }
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288
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289
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290 //
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291 // Tables
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292 //
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293
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294 table {
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295 border-collapse: collapse; // Prevent double borders
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296 }
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297
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298 caption {
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299 padding-top: $table-cell-padding;
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300 padding-bottom: $table-cell-padding;
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301 color: $text-muted;
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302 text-align: left;
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303 caption-side: bottom;
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304 }
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305
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306 th {
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307 // Matches default `<td>` alignment
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308 text-align: left;
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309 }
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310
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311
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312 //
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313 // Forms
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314 //
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315
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316 label {
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317 // Allow labels to use `margin` for spacing.
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318 display: inline-block;
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319 margin-bottom: .5rem;
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320 }
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321
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322 // Work around a Firefox/IE bug where the transparent `button` background
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323 // results in a loss of the default `button` focus styles.
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324 //
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325 // Credit: https://github.com/suitcss/base/
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326 button:focus {
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327 outline: 1px dotted;
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328 outline: 5px auto -webkit-focus-ring-color;
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329 }
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330
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331 input,
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332 button,
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333 select,
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334 optgroup,
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335 textarea {
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336 margin: 0; // Remove the margin in Firefox and Safari
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337 font-family: inherit;
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338 font-size: inherit;
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339 line-height: inherit;
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340 }
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341
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342 button,
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343 input {
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344 overflow: visible; // Show the overflow in Edge
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345 }
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346
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347 button,
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348 select {
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349 text-transform: none; // Remove the inheritance of text transform in Firefox
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350 }
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351
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352 // 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
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353 // controls in Android 4.
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354 // 2. Correct the inability to style clickable types in iOS and Safari.
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355 button,
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356 html [type="button"], // 1
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357 [type="reset"],
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358 [type="submit"] {
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359 -webkit-appearance: button; // 2
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360 }
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361
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362 // Remove inner border and padding from Firefox, but don't restore the outline like Normalize.
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363 button::-moz-focus-inner,
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364 [type="button"]::-moz-focus-inner,
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365 [type="reset"]::-moz-focus-inner,
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366 [type="submit"]::-moz-focus-inner {
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367 padding: 0;
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368 border-style: none;
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369 }
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370
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371 input[type="radio"],
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372 input[type="checkbox"] {
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373 box-sizing: border-box; // 1. Add the correct box sizing in IE 10-
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374 padding: 0; // 2. Remove the padding in IE 10-
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375 }
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376
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377
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378 input[type="date"],
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379 input[type="time"],
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380 input[type="datetime-local"],
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381 input[type="month"] {
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382 // Remove the default appearance of temporal inputs to avoid a Mobile Safari
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383 // bug where setting a custom line-height prevents text from being vertically
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384 // centered within the input.
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385 // See https://bugs.webkit.org/show_bug.cgi?id=139848
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386 // and https://github.com/twbs/bootstrap/issues/11266
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387 -webkit-appearance: listbox;
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388 }
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389
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390 textarea {
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391 overflow: auto; // Remove the default vertical scrollbar in IE.
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392 // Textareas should really only resize vertically so they don't break their (horizontal) containers.
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393 resize: vertical;
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394 }
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395
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396 fieldset {
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397 // Browsers set a default `min-width: min-content;` on fieldsets,
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398 // unlike e.g. `<div>`s, which have `min-width: 0;` by default.
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399 // So we reset that to ensure fieldsets behave more like a standard block element.
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400 // See https://github.com/twbs/bootstrap/issues/12359
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401 // and https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements
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402 min-width: 0;
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403 // Reset the default outline behavior of fieldsets so they don't affect page layout.
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404 padding: 0;
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405 margin: 0;
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406 border: 0;
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407 }
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408
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409 // 1. Correct the text wrapping in Edge and IE.
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410 // 2. Correct the color inheritance from `fieldset` elements in IE.
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411 legend {
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412 display: block;
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413 width: 100%;
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414 max-width: 100%; // 1
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415 padding: 0;
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416 margin-bottom: .5rem;
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417 font-size: 1.5rem;
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418 line-height: inherit;
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419 color: inherit; // 2
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420 white-space: normal; // 1
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421 }
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422
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423 progress {
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424 vertical-align: baseline; // Add the correct vertical alignment in Chrome, Firefox, and Opera.
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425 }
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426
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427 // Correct the cursor style of increment and decrement buttons in Chrome.
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428 [type="number"]::-webkit-inner-spin-button,
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429 [type="number"]::-webkit-outer-spin-button {
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430 height: auto;
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431 }
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432
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433 [type="search"] {
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434 // This overrides the extra rounded corners on search inputs in iOS so that our
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435 // `.form-control` class can properly style them. Note that this cannot simply
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436 // be added to `.form-control` as it's not specific enough. For details, see
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437 // https://github.com/twbs/bootstrap/issues/11586.
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438 outline-offset: -2px; // 2. Correct the outline style in Safari.
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439 -webkit-appearance: none;
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440 }
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441
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442 //
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443 // Remove the inner padding and cancel buttons in Chrome and Safari on macOS.
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444 //
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445
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446 [type="search"]::-webkit-search-cancel-button,
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447 [type="search"]::-webkit-search-decoration {
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448 -webkit-appearance: none;
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449 }
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450
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451 //
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452 // 1. Correct the inability to style clickable types in iOS and Safari.
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453 // 2. Change font properties to `inherit` in Safari.
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454 //
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455
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456 ::-webkit-file-upload-button {
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457 font: inherit; // 2
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458 -webkit-appearance: button; // 1
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459 }
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460
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461 //
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462 // Correct element displays
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463 //
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464
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465 output {
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466 display: inline-block;
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467 }
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468
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469 summary {
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470 display: list-item; // Add the correct display in all browsers
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471 }
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472
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473 template {
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474 display: none; // Add the correct display in IE
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475 }
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476
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477 // Always hide an element with the `hidden` HTML attribute (from PureCSS).
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478 // Needed for proper display in IE 10-.
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479 [hidden] {
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480 display: none !important;
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481 }
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