html
{
    /* killing 300ms touch delay in IE */
    -ms-touch-action: manipulation;
    touch-action: manipulation;
}

#imagelightbox,
#imagelightbox-loading,
#imagelightbox:before,
#imagelightbox-loading:before,
#imagelightbox:after,
#imagelightbox-loading:after
{
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    -webkit-tap-highlight-color: rgba( 0, 0, 0, 0 );
    -webkit-overflow-scrolling: touch;
}

/* IMAGE LIGHTBOX SELECTOR */
#imagelightbox
{
    cursor: pointer;
    position: fixed;
    z-index: 10000;

    -ms-touch-action: none;
    touch-action: none;

    -webkit-box-shadow: 0 0 3.125em rgba( 0, 0, 0, .75 );
    -moz-box-shadow: 0 0 3.125em rgba( 0, 0, 0, .75 );
    box-shadow: 0 0 3.125em rgba( 0, 0, 0, .75 );
}


/* ACTIVITY INDICATION */
#imagelightbox-loading,
#imagelightbox-loading div
{
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    border-radius: 50%;
}

#imagelightbox-loading
{
    width: 2.5em; /* 40 */
    height: 2.5em; /* 40 */
    background-color: #444;
    background-color: rgba( 0, 0, 0, .5 );
    position: fixed;
    z-index: 10003;
    top: 50%;
    left: 50%;
    padding: 0.625em; /* 10 */
    margin: -1.25em 0 0 -1.25em; /* 20 */

    -webkit-box-shadow: 0 0 2.5em rgba( 0, 0, 0, .75 );
    -moz-box-shadow: 0 0 2.5em rgba( 0, 0, 0, .75 );
    box-shadow: 0 0 2.5em rgba( 0, 0, 0, .75 );
}

#imagelightbox-loading div
{
    width: 1.25em; /* 20 */
    height: 1.25em; /* 20 */
    background-color: #fff;

    -webkit-animation: imagelightbox-loading .5s ease infinite;
    -moz-animation: imagelightbox-loading .5s ease infinite;
    -o-animation: imagelightbox-loading .5s ease infinite;
    animation: imagelightbox-loading .5s ease infinite;
}

@-webkit-keyframes imagelightbox-loading
{
    from {opacity: .5; -webkit-transform: scale(.75);}
    50%	 {opacity: 1; -webkit-transform: scale(1);}
    to	 {opacity: .5; -webkit-transform: scale(.75);}
}
@-moz-keyframes imagelightbox-loading
{
    from {opacity: .5; -moz-transform: scale(.75);}
    50% {opacity: 1; -moz-transform: scale(1);}
    to {opacity: .5; -moz-transform: scale(.75);}
}
@-o-keyframes imagelightbox-loading
{
    from {opacity: .5; -o-transform: scale(.75);}
    50% {opacity: 1; -o-transform: scale(1);}
    to {opacity: .5; -o-transform: scale(.75);}
}
@keyframes imagelightbox-loading
{
    from {opacity: .5; transform: scale(.75);}
    50%	 {opacity: 1; transform: scale(1); }
    to	 {opacity: .5; transform: scale(.75);}
}


/* ARROWS */
.imagelightbox-arrow
{
    width: 3.75em; /* 60 */
    height: 7.5em; /* 120 */
    background-color: #444;
    background-color: rgba( 0, 0, 0, .5 );
    vertical-align: middle;
    display: none;
    border: none;
    position: fixed;
    z-index: 10001;
    top: 50%;
    margin-top: -3.75em; /* 60 */
}

.imagelightbox-arrow:hover,
.imagelightbox-arrow:focus
{
    outline: 0;
    background-color: #666;
    background-color: rgba( 0, 0, 0, .75 );
}
.imagelightbox-arrow:active
{
    background-color: #111;
}
.imagelightbox-arrow-left
{
    left: 2.5em; /* 40 */
}
.imagelightbox-arrow-right
{
    right: 2.5em; /* 40 */
}
.imagelightbox-arrow:before
{
    width: 0;
    height: 0;
    border: 1em solid transparent;
    content: '';
    display: inline-block;
    margin-bottom: -0.125em; /* 2 */
}
.imagelightbox-arrow-left:before
{
    border-left: none;
    border-right-color: #fff;
    margin-left: -0.313em; /* 5 */
}
.imagelightbox-arrow-right:before
{
    border-right: none;
    border-left-color: #fff;
    margin-right: -0.313em; /* 5 */
}

#imagelightbox-loading,
#imagelightbox-overlay,
#imagelightbox-close,
#imagelightbox-caption,
#imagelightbox-nav,
.imagelightbox-arrow
{
    -webkit-animation: fade-in .25s linear;
    -moz-animation: fade-in .25s linear;
    -o-animation: fade-in .25s linear;
    animation: fade-in .25s linear;
}

@-webkit-keyframes fade-in
{
    from {opacity: 0;}
    to	{opacity: 1;}
}
@-moz-keyframes fade-in
{
    from {opacity: 0;}
    to {opacity: 1;}
}
@-o-keyframes fade-in
{
    from {opacity: 0;}
    to {opacity: 1;}
}
@keyframes fade-in
{
    from {opacity: 0;}
    to {opacity: 1;}
}


@media only screen and (max-width: 41.250em) /* 660 */
{
    #container
    {
        width: 100%;
    }
    #imagelightbox-close
    {
        top: 1.25em; /* 20 */
        right: 1.25em; /* 20 */
    }
    #imagelightbox-nav
    {
        bottom: 1.25em; /* 20 */
    }
    .imagelightbox-arrow
    {
        width: 2.5em; /* 40 */
        height: 3.75em; /* 60 */
        margin-top: -2.75em; /* 30 */
    }
    .imagelightbox-arrow-left
    {
        left: 1.25em; /* 20 */
    }
    .imagelightbox-arrow-right
    {
        right: 1.25em; /* 20 */
    }
}

@media only screen and (max-width: 20em) /* 320 */
{
    .imagelightbox-arrow-left
    {
        left: 0;
    }
    .imagelightbox-arrow-right
    {
        right: 0;
    }
}