Bootstrap/less/carousel.less

//
// Carousel
// --------------------------------------------------


// Wrapper for the slide container and indicators
.carousel {
  position: relative;
}

.carousel-inner {
  position: relative;
  overflow: hidden;
  width: 100%;

  > .item {
    display: none;
    position: relative;
    .transition(.6s ease-in-out left);

    // Account for jankitude on images
    > img,
    > a > img {
      .img-responsive();
      line-height: 1;
    }
  }

  > .active,
  > .next,
  > .prev { display: block; }

  > .active {
    left: 0;
  }

  > .next,
  > .prev {
    position: absolute;
    top: 0;
    width: 100%;
  }

  > .next {
    left: 100%;
  }
  > .prev {
    left: -100%;
  }
  > .next.left,
  > .prev.right {
    left: 0;
  }

  > .active.left {
    left: -100%;
  }
  > .active.right {
    left: 100%;
  }

}

// Left/right controls for nav
// ---------------------------

.carousel-control {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 15%;
  .opacity(.5);
  font-size: 20px;
  color: #fff;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0,0,0,.6);
  // We can't have this transition here because webkit cancels the carousel
  // animation if you trip this while in the middle of another animation.

  // Set gradients for backgrounds
  &.left {
    #gradient > .horizontal(@start-color: rgba(0,0,0,.5); @end-color: rgba(0,0,0,.0001));
    background-color: transparent;
  }
  &.right {
    left: auto;
    right: 0;
    #gradient > .horizontal(@start-color: rgba(0,0,0,.0001); @end-color: rgba(0,0,0,.5));
    background-color: transparent;
  }

  // Hover/focus state
  &:hover,
  &:focus {
    color: #fff;
    text-decoration: none;
    .opacity(.9);
  }

  // Toggles
  .glyphicon {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 5;
    display: inline-block;
    width:  20px;
    height: 20px;
    margin-top: -10px;
    margin-left: -10px;
  }
}

// Optional indicator pips
// -----------------------------
.carousel-indicators {
  position: absolute;
  bottom: 20px;
  left: 50%;
  z-index: 15;
  width: 100px;
  margin-left: -50px;
  padding-left: 0;
  list-style: none;
  text-align: center;

  li {
    display: inline-block;
    width:  10px;
    height: 10px;
    margin: 1px;
    text-indent: -999px;
    border: 1px solid #fff;
    border-radius: 10px;
    cursor: pointer;
  }
  .active {
    margin: 0;
    width:  12px;
    height: 12px;
    background-color: #fff;
  }
}

// Optional captions
// -----------------------------
// Hidden by default for smaller viewports
.carousel-caption {
  position: absolute;
  left: 15%;
  right: 15%;
  bottom: 20px;
  z-index: 10;
  padding-top: 20px;
  padding-bottom: 20px;
  color: #fff;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0,0,0,.6);
  & .btn {
    text-shadow: none; // No shadow for button elements in carousel-caption
  }
}


// Scale up controls for tablets and up
@media screen and (min-width: @screen-tablet) {

  // Scale up the controls a smidge
  .carousel-control .glyphicon {
    width: 30px;
    height: 30px;
    margin-top: -15px;
    margin-left: -15px;
    font-size: 30px;
  }

  // Show and left align the captions
  .carousel-caption {
    left: 20%;
    right: 20%;
    padding-bottom: 30px;
  }
}