scaffolding.less
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//
// Scaffolding
// --------------------------------------------------
// Reset the box-sizing
//
// Heads up! This reset may cause conflicts with some third-party widgets.
// For recommendations on resolving such conflicts, see
// https://getbootstrap.com/docs/3.4/getting-started/#third-box-sizing
* {
.box-sizing(border-box);
}
*:before,
*:after {
.box-sizing(border-box);
}
// Body reset
html {
font-size: 10px;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
body {
font-family: @font-family-base;
font-size: @font-size-base;
line-height: @line-height-base;
color: @text-color;
background-color: @body-bg;
}
// Reset fonts for relevant elements
input,
button,
select,
textarea {
font-family: inherit;
font-size: inherit;
line-height: inherit;
}
// Links
a {
color: @link-color;
text-decoration: none;
&:hover,
&:focus {
color: @link-hover-color;
text-decoration: @link-hover-decoration;
}
&:focus {
.tab-focus();
}
}
// Figures
//
// We reset this here because previously Normalize had no `figure` margins. This
// ensures we don't break anyone's use of the element.
figure {
margin: 0;
}
// Images
img {
vertical-align: middle;
}
// Responsive images (ensure images don't scale beyond their parents)
.img-responsive {
.img-responsive();
}
// Rounded corners
.img-rounded {
border-radius: @border-radius-large;
}
// Image thumbnails
//
// Heads up! This is mixin-ed into thumbnails.less for `.thumbnail`.
.img-thumbnail {
padding: @thumbnail-padding;
line-height: @line-height-base;
background-color: @thumbnail-bg;
border: 1px solid @thumbnail-border;
border-radius: @thumbnail-border-radius;
.transition(all .2s ease-in-out);
// Keep them at most 100% wide
.img-responsive(inline-block);
}
// Perfect circle
.img-circle {
border-radius: 50%; // set radius in percents
}
// Horizontal rules
hr {
margin-top: @line-height-computed;
margin-bottom: @line-height-computed;
border: 0;
border-top: 1px solid @hr-border;
}
// Only display content to screen readers
//
// See: https://a11yproject.com/posts/how-to-hide-content
.sr-only {
position: absolute;
width: 1px;
height: 1px;
padding: 0;
margin: -1px;
overflow: hidden;
clip: rect(0, 0, 0, 0);
border: 0;
}
// Use in conjunction with .sr-only to only display content when it's focused.
// Useful for "Skip to main content" links; see https://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
// Credit: HTML5 Boilerplate
.sr-only-focusable {
&:active,
&:focus {
position: static;
width: auto;
height: auto;
margin: 0;
overflow: visible;
clip: auto;
}
}
// iOS "clickable elements" fix for role="button"
//
// Fixes "clickability" issue (and more generally, the firing of events such as focus as well)
// for traditionally non-focusable elements with role="button"
// see https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile
[role="button"] {
cursor: pointer;
}