#slideshow {
   position: relative;
   width:  100%;
   height: 56vw;
   min-width: 320px;
   max-width: 768px;
   min-height: 180px;
   max-height: 432px;
   overflow: hidden;
   margin:0 auto;
}
#slideshow img {
   position: absolute;
   width:100%;
   top: 0;
   left:0;
   z-index: 8;
   opacity: 0.0;
}
#slideshow img.active {
   z-index: 10;
   opacity: 1.0;
}
#slideshow img.last-active {
   z-index: 9;
}