sentry/static/less/includes/bootstrap/scaffolding.less

// Rounded corners
.img-rounded {
  border-radius: @border-radius-large;
}

// 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;
}