message: fix carousel controls/markers/captions z index
  Prevents these items from displaying above the header when the page is
  scrolled
diff: @@ -101,7 +101,7 @@ br { clear:both; }
  width: 100%;
  letter-spacing: -1px;
  background: #379;
  - z-index: 1;
  + z-index: 2;
  display: block;
  }
  @@ -588,7 +588,7 @@ p.caption:before {
  right: 0;
  bottom: 0;
  left: 0;
  - z-index: 15;
  + z-index: 1;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-pack: center;
  @@ -632,7 +632,7 @@ p.caption:before {
  right: 15%;
  bottom: -80px;
  left: 15%;
  - z-index: 10;
  + z-index: 1;
  padding-top: 20px;
  padding-bottom: 20px;
  color: #fff;
  