html,
.container,
.slideshow { background-color: rgba(0,0,0,0.2); }

html,
body {
  margin: 0px;
  padding: 0px;
}

.slideshow {
  width: 825px;
  height: 550px;
  margin: 0px auto;
  position: relative;
}

.slideshow .image {
  width: 100%;
  height: 100%;
}

.slideshow .selectors {
  list-style: none;
  padding: 0px;
  position: absolute;
  bottom: 0;
  right: 0;
  margin-right: 50px;
}

.slideshow .selectors li { display: inline-block; }

.slideshow .button {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.5);
}

.slideshow .selected .button { background-color: rgba(0,0,0,0.5); }