:root {
  --sl-cap: 20px;
  --sl-dots: 10px;
  --sl-transition: 0.5s;
}

div.slideshow {
  max-width: 1000px;
  position: relative;
  margin: auto;
}


/* 
 * Slides
 */

figure.slide:first-child {
  /* Position the first slide relatively to set the height (others are 
   * positioned absolutely to allow overlapping) */
  position: relative;
}

figure.slide {
  /* Position slides absolutely to allow overlapping */
  text-align: center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  margin: 0;
  /* Slides start at 0 opacity */
  opacity: 0;
  /* Fade out duration is double the fade in duration (approximates a cross 
   * dissolve) */
  transition: opacity calc(2 * var(--sl-transition)) ease;
  -webkit-transition: opacity calc(2 * var(--sl-transition)) ease;
  -moz-transition: opacity calc(2 * var(--sl-transition))  ease;
  z-index: -1;
}

figure.slide.active {
  opacity: 1;
  z-index: 0;
  /*display: block;*/
  transition: opacity 1s ease;
  -webkit-transition: opacity 1s ease;
  -moz-transition: opacity 1s ease;
}

figure.slide img {
  max-width: 100%;
}


/* 
 * Buttons
 */

#prev, #next, #state, #expand {
  cursor: pointer;
  font-weight: bold;
  font-size: 1.5em;
  user-select: none;
  opacity: 0;
  transition: 0.2s ease;
  position: absolute;
  color: white;
}

#prev, #next {
  top: calc(50% - calc(var(--sl-cap) + var(--sl-dots) + 50px) / 2);
  width: auto;
  padding: 16px;
}

#state, #expand {
  width: 1.5em;
  height: 1.5em;
  line-height: 1.5em;
  text-align: center;
  font-family: monospace;
  top: 15px;
  padding: 4px;
  border-radius: 3px;
}

#state {
  right: 15px;
}

#expand {
  right: calc(15px + 15px + 1.5em);
}

#expand svg path {
  fill: #fff;
}

#prev {
  left: 0;
  border-radius: 0 3px 3px 0;
}

#next {
  /* Position next button on right */
  right: 0;
  border-radius: 3px 0 0 3px;
}

div.slideshow:hover #prev,
div.slideshow:hover #next,
div.slideshow:hover #expand,
div.slideshow:hover #state {
  /* Show buttons on slideshow hover */
  opacity: 100;
  background-color: rgba(0,0,0,0.3);
}

#prev:hover, #next:hover, #expand:hover, #state:hover {
  /* Button hover */
  background-color: rgba(0,0,0,0.8) !important;
}


/* 
 * Dot controls/indicators
 */

div.slideshow div#controls {
  text-align: center;
  width: 100%;
}

div.slideshow div#controls span {
  cursor: pointer;
  height: var(--sl-dots);
  width: var(--sl-dots);
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

div#controls span.active,
div#controls span:hover {
  background-color: #717171 !important;
}