twbs--bootstrap/less/scaffolding.less

//
// Scaffolding
// --------------------------------------------------


// Reset the box-sizing
// -------------------------

*,
*:before,
*:after {
  .box-sizing(border-box);
}


// Body reset
// -------------------------

html {
  font-size: 62.5%;
  -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;
}

// Reset unusual Firefox-on-Android default style, see https://github.com/necolas/normalize.css/issues/214
button,
input,
select[multiple],
textarea {
  background-image: none;
}


// Links
// -------------------------

a {
  color: @link-color;
  text-decoration: none;

  &:hover,
  &:focus {
    color: @link-hover-color;
    text-decoration: underline;
  }

  &:focus {
    .tab-focus();
  }
}


// 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
// See thumbnails.less for `.img-thumbnail`

// 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: http://a11yproject.com/posts/how-to-hide-content/
// -------------------------

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}