/**
 * See: http://www.css-101.org/articles/ken-burns_effect/css-transition.php
 */

/**
 * Styling the container (the wrapper)
 * 
 * position is used to make this box a containing block (it becomes a reference for its absolutely positioned children). overflow will hide part of the images moving outside of the box.
 */

.aji-slideshow {
  position: relative;
  width: 800px;
  height: 400px;
  overflow: hidden;
  /* border:8px solid #ccc; */
}

/**
 * Styling the images
 *
 * position:absolute is to put all images in a stack. Dimensions are set to increase the size of these images so their edges do not appear in the parent box when we move them inside the said box.
 * Because the images are now larger than their parent container, we use top, left and margin values to align them in the center of the box.
 * Finally, we set the transition (property and duration). Note that duration values are different for opacity and transform as we want the "fade-in" effect to be faster than the "panning" effect.
 */

.aji-slideshow img {
  position: absolute;
  width: 800px;
  height: auto;
  min-height: 400px;
  top: 50%;
  left: 50%;
  margin-left: -400px;
  margin-top: -200px;
  opacity: 0;
  transition-property: opacity, transform;
  transition-duration: 2s, 12s;
}

/**
 * We change the point of origin using four corners so images do not move in the same direction. 
 * This technique allows us to create various paths while applying the same translate() values to all images (see the 'fx' class further below).
 */

.aji-slideshow img {
  transform-origin: bottom left;
}

.aji-slideshow :nth-child(2n + 1) {
  transform-origin: top right;
}

.aji-slideshow :nth-child(3n + 1) {
  transform-origin: top left;
}
.aji-slideshow :nth-child(4n + 1) {
  transform-origin: bottom right;
}

/**
 * Because of the stacking context, we need to make sure that the first image (in source) is not hidden by the last one. 
 * The rule below moves all images past the second one down the stack. 
 * This is because the second image needs to show on top of the first one when it transitions in.
 */

.aji-slideshow .fx:first-child + img ~ img {
  z-index: -1;
}

/**
 * Because images are styled with a different point of origin, the following rule will create different panning effects.
 */

.aji-slideshow .fx {
  opacity: 1;
  transform: scale(1.1);
}