/**
 * 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: 100%;
    /* Height is set dynamically in javascript in master file */

    overflow: hidden;
}

#slideshow:after {
    content: '';
    background-color: black;
    opacity: .4;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    z-index: 0;
}

#pnTopStuff {
    
}
/**
 * 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: 100%;
    top: 0px;
    left: 0px;
    opacity: 0;
    -webkit-transition-property: opacity, -webkit-transform;
    -webkit-transition-duration: 3s, 10s;
    -moz-transition-property: opacity, -moz-transform;
    -moz-transition-duration: 3s, 10s;
    -ms-transition-property: opacity, -ms-transform;
    -ms-transition-duration: 3s, 10s;
    -o-transition-property: opacity, -o-transform;
    -o-transition-duration: 3s, 10s;
    transition-property: opacity, transform;
    transition-duration: 3s, 10s;
}

/**
 * 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(1.1);
    -moz-transform: scale(1.1);
    -ms-transform: scale(1.1);
    -o-transform: scale(1.1);
    transform: scale(1.1);
}

@media (max-width: 768px) {
    #slideshow img {           
        height: 100%;
    }
}