/**
* 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.
*/
 
#slideshow {
position:relative;
width:240px;
height:160px;
overflow:hidden;
border:8px solid #fff;
}
 
/**
* 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.
*/
 
#slideshow img {
position:absolute;
width:360px;
height:240px;
top:50%;
left:50%;
margin-left:-180px;
margin-top:-120px;
opacity:0;
-webkit-transition-property: opacity, -webkit-transform;
-webkit-transition-duration: 3s, 8s;
-moz-transition-property: opacity, -moz-transform;
-moz-transition-duration: 3s, 8s;
-ms-transition-property: opacity, -ms-transform;
-ms-transition-duration: 3s, 8s;
-o-transition-property: opacity, -o-transform;
-o-transition-duration: 3s, 8s;
transition-property: opacity, transform;
transition-duration: 3s, 8s;
}
 
/**
* 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).
*/
 
#slideshow img {
-webkit-transform-origin: bottom left;
-moz-transform-origin: bottom left;
-ms-transform-origin: bottom left;
-o-transform-origin: bottom left;
transform-origin: bottom left;
}
 
#slideshow :nth-child(2n+1) {
-webkit-transform-origin: top right;
-moz-transform-origin: top right;
-ms-transform-origin: top right;
-o-transform-origin: top right;
transform-origin: top right;
}
 
#slideshow :nth-child(3n+1) {
-webkit-transform-origin: top left;
-moz-transform-origin: top left;
-ms-transform-origin: top left;
-o-transform-origin: top left;
transform-origin: top left;
}
#slideshow :nth-child(4n+1) {
-webkit-transform-origin: bottom right;
-moz-transform-origin: bottom right;
-ms-transform-origin: bottom right;
-o-transform-origin: bottom right;
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.
*/
 
#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.
*/
 
#slideshow .fx {
opacity:1;
-webkit-transform: scale(1.5) translate(30px);
-moz-transform: scale(1.5) translate(30px);
-ms-transform: scale(1.5) translate(30px);
-o-transform: scale(1.5) translate(30px);
transform: scale(1.5) translate(30px);
}