bootstrap.css

  position: absolute;
  right: 15%;
  bottom: 20px;
  left: 15%;
  z-index: 10;
  padding-top: 20px;
  padding-bottom: 20px;
  color: #fff;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.carousel-caption .btn {
  text-shadow: none;
}

@media screen and (min-width: 768px) {
  .carousel-control .glyphicon {
    width: 30px;
    height: 30px;
    margin-top: -15px;
    margin-left: -15px;
    font-size: 30px;
  }
  .carousel-caption {
    right: 20%;
    left: 20%;
    padding-bottom: 30px;
  }
}

.jumbotron {
  padding: 30px;
  margin-bottom: 30px;
  font-size: 21px;
  font-weight: 200;
  line-height: 2.1428571435;
  color: inherit;
  background-color: #eeeeee;
}

.jumbotron h1 {
  line-height: 1;
  color: inherit;
}

.jumbotron p {
  line-height: 1.4;
}

@media screen and (min-width: 768px) {
  .jumbotron {
    padding: 50px 60px;
    border-radius: 6px;
  }
  .jumbotron h1 {
    font-size: 63px;
  }
}

.clearfix:before,
.clearfix:after {
  display: table;
  content: " ";
}

.clearfix:after {
  clear: both;
}

.pull-right {
  float: right;
}

.pull-left {
  float: left;
}

.hide {
  display: none !important;
}

.show {
  display: block !important;
}

.invisible {
  visibility: hidden;
}

.text-hide {
  font: 0/0 a;
  color: transparent;
  text-shadow: none;
  background-color: transparent;
  border: 0;
}

.affix {
  position: fixed;
}

@-ms-viewport {
  width: device-width;
}

@media screen and (max-width: 400px) {
  @-ms-viewport {
    width: 320px;
  }
}

.hidden {
  display: none;
  visibility: hidden;
}

.visible-sm {
  display: inherit !important;
}

.visible-md {
  display: none !important;
}

.visible-lg {
  display: none !important;
}

.hidden-sm {
  display: none !important;
}

.hidden-md {
  display: inherit !important;
}

.hidden-lg {
  display: inherit !important;
}

@media (min-width: 768px) and (max-width: 991px) {
  .visible-sm {
    display: none !important;
  }
  .visible-md {
    display: inherit !important;
  }
  .visible-lg {
    display: none !important;
  }
  .hidden-sm {
    display: inherit !important;
  }
  .hidden-md {
    display: none !important;
  }
  .hidden-lg {
    display: inherit !important;
  }
}

@media (min-width: 992px) {
  .visible-sm {
    display: none !important;
  }
  .visible-md {
    display: none !important;
  }
  .visible-lg {
    display: inherit !important;
  }
  .hidden-sm {
    display: inherit !important;
  }
  .hidden-md {
    display: inherit !important;
  }
  .hidden-lg {
    display: none !important;
  }
}

.visible-print {
  display: none !important;
}

@media print {
  .visible-print {
    display: inherit !important;
  }
  .hidden-print {
    display: none !important;
  }
}