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From 2013.igem.org

.gallery .control-operator:target ~ .controls .control-button {

 color: #ccc;
 color: rgba(255, 255, 255, 0.4);

}

.gallery .control-button:first-of-type, .items-2 .control-operator:nth-of-type(1):target ~ .controls .control-button:nth-of-type(1), .items-2 .control-operator:nth-of-type(2):target ~ .controls .control-button:nth-of-type(2), .items-3 .control-operator:nth-of-type(1):target ~ .controls .control-button:nth-of-type(1), .items-3 .control-operator:nth-of-type(2):target ~ .controls .control-button:nth-of-type(2), .items-3 .control-operator:nth-of-type(3):target ~ .controls .control-button:nth-of-type(3), .items-4 .control-operator:nth-of-type(1):target ~ .controls .control-button:nth-of-type(1), .items-4 .control-operator:nth-of-type(2):target ~ .controls .control-button:nth-of-type(2), .items-4 .control-operator:nth-of-type(3):target ~ .controls .control-button:nth-of-type(3), .items-4 .control-operator:nth-of-type(4):target ~ .controls .control-button:nth-of-type(4), .items-5 .control-operator:nth-of-type(1):target ~ .controls .control-button:nth-of-type(1), .items-5 .control-operator:nth-of-type(2):target ~ .controls .control-button:nth-of-type(2), .items-5 .control-operator:nth-of-type(3):target ~ .controls .control-button:nth-of-type(3), .items-5 .control-operator:nth-of-type(4):target ~ .controls .control-button:nth-of-type(4), .items-5 .control-operator:nth-of-type(5):target ~ .controls .control-button:nth-of-type(5) {

 color: white;
 color: rgba(255, 255, 255, 0.8);

}

.gallery .item:first-of-type {

 position: static;
 opacity: 1;

}

.gallery .item {

 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 opacity: 0;
 -webkit-transition: opacity .5s;
 -o-transition: opacity .5s;
 transition: opacity .5s;

}

.gallery .control-operator {

 display: none;

}

.gallery .control-operator:target ~ .item {

 pointer-events: none;
 opacity: 0;
 -webkit-animation: none;
 -o-animation: none;
 animation: none;

}

.gallery .control-operator:target ~ .controls .control-button {

 -webkit-animation: none;
 -o-animation: none;
 animation: none;

}

@-webkit-keyframes controlAnimation-2 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 14.3%, 50% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 64.3%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@-o-keyframes controlAnimation-2 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 14.3%, 50% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 64.3%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@keyframes controlAnimation-2 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 14.3%, 50% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 64.3%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@-webkit-keyframes galleryAnimation-2 {

 0% {
   opacity: 0;
 }

 14.3%, 50% {
   opacity: 1;
 }

 64.3%, 100% {
   opacity: 0;
 }

}

@-o-keyframes galleryAnimation-2 {

 0% {
   opacity: 0;
 }

 14.3%, 50% {
   opacity: 1;
 }

 64.3%, 100% {
   opacity: 0;
 }

}

@keyframes galleryAnimation-2 {

 0% {
   opacity: 0;
 }

 14.3%, 50% {
   opacity: 1;
 }

 64.3%, 100% {
   opacity: 0;
 }

}

.items-2.autoplay .control-button {

 -webkit-animation: controlAnimation-2 14s infinite;
 -o-animation: controlAnimation-2 14s infinite;
 animation: controlAnimation-2 14s infinite;

}

.items-2.autoplay .item {

 -webkit-animation: galleryAnimation-2 14s infinite;
 -o-animation: galleryAnimation-2 14s infinite;
 animation: galleryAnimation-2 14s infinite;

}

.items-2 .control-operator:nth-of-type(1):target ~ .item:nth-of-type(1) {

 pointer-events: auto;
 opacity: 1;

}

.items-2 .control-button:nth-of-type(1), .items-2 .item:nth-of-type(1) {

 -webkit-animation-delay: -2s;
 -o-animation-delay: -2s;
 animation-delay: -2s;

}

.items-2 .control-operator:nth-of-type(2):target ~ .item:nth-of-type(2) {

 pointer-events: auto;
 opacity: 1;

}

.items-2 .control-button:nth-of-type(2), .items-2 .item:nth-of-type(2) {

 -webkit-animation-delay: 5s;
 -o-animation-delay: 5s;
 animation-delay: 5s;

}

@-webkit-keyframes controlAnimation-3 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 9.5%, 33.3% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 42.9%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@-o-keyframes controlAnimation-3 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 9.5%, 33.3% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 42.9%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@keyframes controlAnimation-3 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 9.5%, 33.3% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 42.9%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@-webkit-keyframes galleryAnimation-3 {

 0% {
   opacity: 0;
 }

 9.5%, 33.3% {
   opacity: 1;
 }

 42.9%, 100% {
   opacity: 0;
 }

}

@-o-keyframes galleryAnimation-3 {

 0% {
   opacity: 0;
 }

 9.5%, 33.3% {
   opacity: 1;
 }

 42.9%, 100% {
   opacity: 0;
 }

}

@keyframes galleryAnimation-3 {

 0% {
   opacity: 0;
 }

 9.5%, 33.3% {
   opacity: 1;
 }

 42.9%, 100% {
   opacity: 0;
 }

}

.items-3.autoplay .control-button {

 -webkit-animation: controlAnimation-3 21s infinite;
 -o-animation: controlAnimation-3 21s infinite;
 animation: controlAnimation-3 21s infinite;

}

.items-3.autoplay .item {

 -webkit-animation: galleryAnimation-3 21s infinite;
 -o-animation: galleryAnimation-3 21s infinite;
 animation: galleryAnimation-3 21s infinite;

}

.items-3 .control-operator:nth-of-type(1):target ~ .item:nth-of-type(1) {

 pointer-events: auto;
 opacity: 1;

}

.items-3 .control-button:nth-of-type(1), .items-3 .item:nth-of-type(1) {

 -webkit-animation-delay: -2s;
 -o-animation-delay: -2s;
 animation-delay: -2s;

}

.items-3 .control-operator:nth-of-type(2):target ~ .item:nth-of-type(2) {

 pointer-events: auto;
 opacity: 1;

}

.items-3 .control-button:nth-of-type(2), .items-3 .item:nth-of-type(2) {

 -webkit-animation-delay: 5s;
 -o-animation-delay: 5s;
 animation-delay: 5s;

}

.items-3 .control-operator:nth-of-type(3):target ~ .item:nth-of-type(3) {

 pointer-events: auto;
 opacity: 1;

}

.items-3 .control-button:nth-of-type(3), .items-3 .item:nth-of-type(3) {

 -webkit-animation-delay: 12s;
 -o-animation-delay: 12s;
 animation-delay: 12s;

}

@-webkit-keyframes controlAnimation-4 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 7.1%, 25% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 32.1%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@-o-keyframes controlAnimation-4 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 7.1%, 25% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 32.1%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@keyframes controlAnimation-4 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 7.1%, 25% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 32.1%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@-webkit-keyframes galleryAnimation-4 {

 0% {
   opacity: 0;
 }

 7.1%, 25% {
   opacity: 1;
 }

 32.1%, 100% {
   opacity: 0;
 }

}

@-o-keyframes galleryAnimation-4 {

 0% {
   opacity: 0;
 }

 7.1%, 25% {
   opacity: 1;
 }

 32.1%, 100% {
   opacity: 0;
 }

}

@keyframes galleryAnimation-4 {

 0% {
   opacity: 0;
 }

 7.1%, 25% {
   opacity: 1;
 }

 32.1%, 100% {
   opacity: 0;
 }

}

.items-4.autoplay .control-button {

 -webkit-animation: controlAnimation-4 28s infinite;
 -o-animation: controlAnimation-4 28s infinite;
 animation: controlAnimation-4 28s infinite;

}

.items-4.autoplay .item {

 -webkit-animation: galleryAnimation-4 28s infinite;
 -o-animation: galleryAnimation-4 28s infinite;
 animation: galleryAnimation-4 28s infinite;

}

.items-4 .control-operator:nth-of-type(1):target ~ .item:nth-of-type(1) {

 pointer-events: auto;
 opacity: 1;

}

.items-4 .control-button:nth-of-type(1), .items-4 .item:nth-of-type(1) {

 -webkit-animation-delay: -2s;
 -o-animation-delay: -2s;
 animation-delay: -2s;

}

.items-4 .control-operator:nth-of-type(2):target ~ .item:nth-of-type(2) {

 pointer-events: auto;
 opacity: 1;

}

.items-4 .control-button:nth-of-type(2), .items-4 .item:nth-of-type(2) {

 -webkit-animation-delay: 5s;
 -o-animation-delay: 5s;
 animation-delay: 5s;

}

.items-4 .control-operator:nth-of-type(3):target ~ .item:nth-of-type(3) {

 pointer-events: auto;
 opacity: 1;

}

.items-4 .control-button:nth-of-type(3), .items-4 .item:nth-of-type(3) {

 -webkit-animation-delay: 12s;
 -o-animation-delay: 12s;
 animation-delay: 12s;

}

.items-4 .control-operator:nth-of-type(4):target ~ .item:nth-of-type(4) {

 pointer-events: auto;
 opacity: 1;

}

.items-4 .control-button:nth-of-type(4), .items-4 .item:nth-of-type(4) {

 -webkit-animation-delay: 19s;
 -o-animation-delay: 19s;
 animation-delay: 19s;

}

@-webkit-keyframes controlAnimation-5 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 5.7%, 20% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 25.7%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@-o-keyframes controlAnimation-5 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 5.7%, 20% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 25.7%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@keyframes controlAnimation-5 {

 0% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

 5.7%, 20% {
   color: white;
   color: rgba(255, 255, 255, 0.8);
 }

 25.7%, 100% {
   color: #ccc;
   color: rgba(255, 255, 255, 0.4);
 }

}

@-webkit-keyframes galleryAnimation-5 {

 0% {
   opacity: 0;
 }

 5.7%, 20% {
   opacity: 1;
 }

 25.7%, 100% {
   opacity: 0;
 }

}

@-o-keyframes galleryAnimation-5 {

 0% {
   opacity: 0;
 }

 5.7%, 20% {
   opacity: 1;
 }

 25.7%, 100% {
   opacity: 0;
 }

}

@keyframes galleryAnimation-5 {

 0% {
   opacity: 0;
 }

 5.7%, 20% {
   opacity: 1;
 }

 25.7%, 100% {
   opacity: 0;
 }

}

.items-5.autoplay .control-button {

 -webkit-animation: controlAnimation-5 35s infinite;
 -o-animation: controlAnimation-5 35s infinite;
 animation: controlAnimation-5 35s infinite;

}

.items-5.autoplay .item {

 -webkit-animation: galleryAnimation-5 35s infinite;
 -o-animation: galleryAnimation-5 35s infinite;
 animation: galleryAnimation-5 35s infinite;

}

.items-5 .control-operator:nth-of-type(1):target ~ .item:nth-of-type(1) {

 pointer-events: auto;
 opacity: 1;

}

.items-5 .control-button:nth-of-type(1), .items-5 .item:nth-of-type(1) {

 -webkit-animation-delay: -2s;
 -o-animation-delay: -2s;
 animation-delay: -2s;

}

.items-5 .control-operator:nth-of-type(2):target ~ .item:nth-of-type(2) {

 pointer-events: auto;
 opacity: 1;

}

.items-5 .control-button:nth-of-type(2), .items-5 .item:nth-of-type(2) {

 -webkit-animation-delay: 5s;
 -o-animation-delay: 5s;
 animation-delay: 5s;

}

.items-5 .control-operator:nth-of-type(3):target ~ .item:nth-of-type(3) {

 pointer-events: auto;
 opacity: 1;

}

.items-5 .control-button:nth-of-type(3), .items-5 .item:nth-of-type(3) {

 -webkit-animation-delay: 12s;
 -o-animation-delay: 12s;
 animation-delay: 12s;

}

.items-5 .control-operator:nth-of-type(4):target ~ .item:nth-of-type(4) {

 pointer-events: auto;
 opacity: 1;

}

.items-5 .control-button:nth-of-type(4), .items-5 .item:nth-of-type(4) {

 -webkit-animation-delay: 19s;
 -o-animation-delay: 19s;
 animation-delay: 19s;

}

.items-5 .control-operator:nth-of-type(5):target ~ .item:nth-of-type(5) {

 pointer-events: auto;
 opacity: 1;

}

.items-5 .control-button:nth-of-type(5), .items-5 .item:nth-of-type(5) {

 -webkit-animation-delay: 26s;
 -o-animation-delay: 26s;
 animation-delay: 26s;

}

.gallery .control-button {

 color: #ccc;
 color: rgba(255, 255, 255, 0.4);

}

.gallery .control-button:hover {

 color: white;
 color: rgba(255, 255, 255, 0.8);

}

/* Theme controls how everything looks in Gallery CSS.

• /

.gallery {

 position: relative;

}

.gallery .item {

 height: 400px;
 overflow: hidden;
 text-align: center;
 background: #FFF;

}

.gallery .controls {

 position: absolute;
 bottom: 0;
 width: 100%;
 text-align: center;

}

.gallery .control-button {

 display: inline-block;
 margin: 0 .02em;
 font-size: 3em;
 text-align: center;
 text-decoration: none;
 -webkit-transition: color .1s;
 -o-transition: color .1s;
 transition: color .1s;

}