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About the <head>

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CSS

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HTML 

              
                <div class="container">
  <section class="color-1">
    <p class="text note-touch">Note that on mobile devices the effects might not all work as intended.</p>
    <p>
      <button class="btn btn-1 btn-1a">Button</button>
      <button class="btn btn-1 btn-1b">Button</button>
      <button class="btn btn-1 btn-1c">Button</button>
    </p>
    <p>
      <button class="btn btn-1 btn-1d">Button</button>
      <button class="btn btn-1 btn-1e">Button</button>
      <button class="btn btn-1 btn-1f">Button</button>
    </p>
  </section>
  <section class="color-2">
    <p>
      <button class="btn btn-2 btn-2a">Button</button>
      <button class="btn btn-2 btn-2b">Button</button>
    </p>
    <p>
      <button class="btn btn-2 btn-2c">Button</button>
      <button class="btn btn-2 btn-2d">Button</button>
    </p>
    <p>
      <button class="btn btn-2 btn-2e">Button</button>
      <button class="btn btn-2 btn-2f">Button</button>
    </p>
    <p>
      <button class="btn btn-2 btn-2g">Button</button>
      <button class="btn btn-2 btn-2h">Button</button>
    </p>
    <p>
      <button class="btn btn-2 btn-2i">Yes</button>
      <button class="btn btn-2 btn-2j">No</button>
    </p>
  </section>
  <section class="color-3">
    <p>
      <button class="btn btn-3 btn-3a icon-cart">Add to cart</button>
      <button class="btn btn-3 btn-3b icon-star-2">Bookmark</button>
    </p>
    <p>
      <button class="btn btn-3 btn-3c icon-heart-2">Favorite</button>
    </p>
    <p>
      <button class="btn btn-3 btn-3d icon-cog">Settings</button>
      <button class="btn btn-3 btn-3e icon-arrow-right">Send data</button>
    </p>
  </section>
  <section class="color-4">
    <p>
      <button class="btn btn-4 btn-4a icon-arrow-right">Continue</button>
      <button class="btn btn-4 btn-4b icon-arrow-left">Return</button>
    </p>
    <p>
      <button class="btn btn-4 btn-4c icon-arrow-right">Continue</button>
      <button class="btn btn-4 btn-4d icon-arrow-left">Return</button>
    </p>
  </section>
  <section class="color-5">
    <p>
      <button class="btn btn-5 btn-5a icon-cart"><span>Add to cart</span></button>
      <button class="btn btn-5 btn-5a icon-remove"><span>Delete</span></button>
      <button class="btn btn-5 btn-5a icon-cog"><span>Settings</span></button>
    </p>
    <p>
      <button class="btn btn-5 btn-5b icon-cart"><span>Add to cart</span></button>
      <button class="btn btn-5 btn-5b icon-remove"><span>Delete</span></button>
      <button class="btn btn-5 btn-5b icon-cog"><span>Settings</span></button>
    </p>
  </section>
  <section class="color-6">
    <p>
      <button class="btn btn-6 btn-6a">Button</button>
      <button class="btn btn-6 btn-6b">Button</button>
      <button class="btn btn-6 btn-6c">Button</button>
    </p>
    <p>
      <button class="btn btn-6 btn-6d">Button</button>
      <button class="btn btn-6 btn-6e">Button</button>
      <button class="btn btn-6 btn-6f">Button</button>
    </p>
    <p>
      <button class="btn btn-6 btn-6g">Button</button>
      <button class="btn btn-6 btn-6h">Button</button>
      <button class="btn btn-6 btn-6i">Button</button>
    </p>
    <p>
      <button class="btn btn-6 btn-6j">Button</button>
      <button class="btn btn-6 btn-6k">Button</button>
      <button class="btn btn-6 btn-6l">Button</button>
    </p>
  </section>
  <section class="color-7" id="btn-click">
    <p class="text">Click on the buttons to see the effect</p>
    <p>
      <button class="btn btn-7 btn-7a icon-truck">Order item</button>
      <button class="btn btn-7 btn-7b icon-envelope">Send message</button>
    </p>
    <p>
      <button class="btn btn-7 btn-7c btn-icon-only icon-arrow-right">Submit</button>
      <button class="btn btn-7 btn-7d btn-icon-only icon-remove">Empty</button>
    </p>
    <p>
      <button class="btn btn-7 btn-7e btn-icon-only icon-heart">Like</button>
      <button class="btn btn-7 btn-7f btn-icon-only icon-star">Fav</button>
      <button class="btn btn-7 btn-7g btn-icon-only icon-plus">Add</button>
    </p>
    <p>
      <button class="btn btn-7 btn-7h icon-envelope">Submit form</button>
      <button class="btn btn-7 btn-7h icon-envelope">Submit form</button>
    </p>
    <div id="trash-effect" class="trash-effect">
      <button class="btn btn-7 btn-7i btn-icon-only icon-remove-2">Remove</button>
      <div class="icon-file"></div>
      <div class="icon-file"></div>
      <div class="icon-file"></div>
    </div>
  </section>
  <section class="color-8">
    <p class="perspective">
      <button class="btn btn-8 btn-8a">3D Button</button>
    </p>
    <p class="perspective">
      <button class="btn btn-8 btn-8b">3D Button</button>
    </p>
    <br />
    <p class="perspective">
      <button class="btn btn-8 btn-8c">3D Button</button>
    </p>
    <p class="perspective">
      <button class="btn btn-8 btn-8d">3D Button</button>
    </p>
    <p class="text">Click the following buttons to see the effect:</p>
    <p class="perspective">
      <button class="btn btn-8 btn-8e">3D Button</button>
    </p>
    <p class="perspective">
      <button class="btn btn-8 btn-8f">3D Button</button>
    </p>
    <br />
    <p class="perspective">
      <button class="btn btn-8 btn-8g">3D Button</button>
    </p>
    <p class="perspective">
      <button class="btn btn-8 btn-8g">3D Button</button>
    </p>
  </section>
</div>
!

CSS 

              
                body {
  margin: 0;
  padding: 0;
  width:100%;
  height:100%;
  font-family: 'Open Sans';
}

@font-face {
	font-family: 'icomoon';
	src:url('../fonts/icomoon/icomoon.eot');
	src:url('../fonts/icomoon/icomoon.eot?#iefix') format('embedded-opentype'),
		url('../fonts/icomoon/icomoon.woff') format('woff'),
		url('../fonts/icomoon/icomoon.ttf') format('truetype'),
		url('../fonts/icomoon/icomoon.svg#icomoon') format('svg');
	font-weight: normal;
	font-style: normal;
}

.container {
	height: 100%;
	position: relative;
}

.container > section {
	margin: 0 auto;
	padding: 5em 3em;
	text-align: center;
	color: #fff;
}

.container > section p {
	position: relative;
	margin: 0;
	padding: 1em;
	z-index: 1;
}

.container > section p.text {
	font-size: 1.4em;
}

.no-touch .note-touch {
	display: none;
}

.color-1 {
	background: #0e83cd;
}

.color-2 {
	background: #f06060;
}

.color-3 {
	background: #fcd04b;
}

.color-4 {
	background: #2ecc71;
}

.color-5 {
	background: #9e54bd;
}

.color-6 {
	background: #4593e3;
}

.color-7 {
	background: #2ac56c;
}

.color-8 {
	background: #ecf0f1;
}

.color-8 p.text {
	color: #aaa;
	font-weight: bold;
}

@media screen and (max-width: 25em) {

	.codrops-icon span {
		display: none;
	}

}

/* General button style (reset) */
.btn {
	border: none;
	font-family: inherit;
	font-size: inherit;
	color: inherit;
	background: none;
	cursor: pointer;
	padding: 25px 80px;
	display: inline-block;
	margin: 15px 30px;
	text-transform: uppercase;
	letter-spacing: 1px;
	font-weight: 700;
	outline: none;
	position: relative;
	-webkit-transition: all 0.3s;
	-moz-transition: all 0.3s;
	transition: all 0.3s;
}

.btn:after {
	content: '';
	position: absolute;
	z-index: -1;
	-webkit-transition: all 0.3s;
	-moz-transition: all 0.3s;
	transition: all 0.3s;
}

/* Pseudo elements for icons */
.btn:before,
.icon-heart:after,
.icon-star:after,
.icon-plus:after,
.icon-file:before {
	font-family: 'icomoon';
	speak: none;
	font-style: normal;
	font-weight: normal;
	font-variant: normal;
	text-transform: none;
	line-height: 1;
	position: relative;
	-webkit-font-smoothing: antialiased;
}

.icon-envelope:before {
	content: "\e000";
}

.icon-cart:before {
	content: "\e007";
}

.icon-cart-2:before {
	content: "\e008";
}

.icon-heart:before {
	content: "\e009";
}

/* Filled heart */
.icon-heart:after,
.icon-heart-2:before {
	content: "\e00a";
}

.icon-star:before {
	content: "\e00b";
}

/* Filled star */
.icon-star:after,
.icon-star-2:before {
	content: "\e00c";
}

.icon-arrow-right:before {
	content: "\e00d";
}

.icon-arrow-left:before {
	content: "\e003";
}

.icon-truck:before {
	content: "\e00e";
}

.icon-remove:before {
	content: "\e00f";
}

.icon-cog:before {
	content: "\e010";
}

.icon-plus:before,
.icon-plus:after {
	content: "\e011";
}

.icon-minus:before {
	content: "\e012";
}

.bh-icon-smiley:before {
	content: "\e001";
}

.bh-icon-sad:before {
	content: "\e002";
}

.icon-file:before {
	content: "\e004";
}

.icon-remove-2:before {
	content: "\e005";
}

/* Button 1 */
.btn-1 {
	border: 3px solid #fff;
	color: #fff;
}

/* Button 1a */
.btn-1a:hover,
.btn-1a:active {
	color: #0e83cd;
	background: #fff;
}

/* Button 1b */
.btn-1b:after {
	width: 100%;
	height: 0;
	top: 0;
	left: 0;
	background: #fff;
}

.btn-1b:hover,
.btn-1b:active {
	color: #0e83cd;
}

.btn-1b:hover:after,
.btn-1b:active:after {
	height: 100%;
}

/* Button 1c */
.btn-1c:after {
	width: 0%;
	height: 100%;
	top: 0;
	left: 0;
	background: #fff;
}

.btn-1c:hover,
.btn-1c:active {
	color: #0e83cd;
}

.btn-1c:hover:after,
.btn-1c:active:after {
	width: 100%;
}

/* Button 1d */
.btn-1d {
	overflow: hidden;
}

.btn-1d:after {
	width: 0;
	height: 103%;
	top: 50%;
	left: 50%;
	background: #fff;
	opacity: 0;
	-webkit-transform: translateX(-50%) translateY(-50%);
	-moz-transform: translateX(-50%) translateY(-50%);
	-ms-transform: translateX(-50%) translateY(-50%);
	transform: translateX(-50%) translateY(-50%);
}

.btn-1d:hover,
.btn-1d:active {
	color: #0e83cd;
}

.btn-1d:hover:after {
	width: 90%;
	opacity: 1;
}

.btn-1d:active:after {
	width: 101%;
	opacity: 1;
}

/* Button 1e */
.btn-1e {
	overflow: hidden;
}

.btn-1e:after {
	width: 100%;
	height: 0;
	top: 50%;
	left: 50%;
	background: #fff;
	opacity: 0;
	-webkit-transform: translateX(-50%) translateY(-50%) rotate(45deg);
	-moz-transform: translateX(-50%) translateY(-50%) rotate(45deg);
	-ms-transform: translateX(-50%) translateY(-50%) rotate(45deg);
	transform: translateX(-50%) translateY(-50%) rotate(45deg);
}

.btn-1e:hover,
.btn-1e:active {
	color: #0e83cd;
}

.btn-1e:hover:after {
	height: 260%;
	opacity: 1;
}

.btn-1e:active:after {
	height: 400%;
	opacity: 1;
}

/* Button 1f */
.btn-1f {
	overflow: hidden;
}

.btn-1f:after {
	width: 101%;
	height: 0;
	top: 50%;
	left: 50%;
	background: #fff;
	opacity: 0;
	-webkit-transform: translateX(-50%) translateY(-50%);
	-moz-transform: translateX(-50%) translateY(-50%);
	-ms-transform: translateX(-50%) translateY(-50%);
	transform: translateX(-50%) translateY(-50%);
}

.btn-1f:hover,
.btn-1f:active {
	color: #0e83cd;
}

.btn-1f:hover:after {
	height: 75%;
	opacity: 1;
}

.btn-1f:active:after {
	height: 130%;
	opacity: 1;
}

/* Button 2 */
.btn-2 {
	background: #cb4e4e;
	color: #fff;
	box-shadow: 0 6px #ab3c3c;
	-webkit-transition: none;
	-moz-transition: none;
	transition: none;
}

/* Button 2a */
.btn-2a {
	border-radius: 0 0 5px 5px;
}

.btn-2a:hover {
	box-shadow: 0 4px #ab3c3c;
	top: 2px;
}

.btn-2a:active {
	box-shadow: 0 0 #ab3c3c;
	top: 6px;
}

/* Button 2b */
.btn-2b {
	border-radius: 0 0 5px 5px;
}

.btn-2b:hover {
	box-shadow: 0 8px #ab3c3c;
	top: -2px;
}

.btn-2b:active {
	box-shadow: 0 0 #ab3c3c;
	top: 6px;
}

/* Button 2c */
.btn-2c {
	border-radius: 5px;
}

.btn-2c:hover {
	box-shadow: 0 4px #ab3c3c;
	top: 2px;
}

.btn-2c:active {
	box-shadow: 0 0 #ab3c3c;
	top: 6px;
}

/* Button 2d */
.btn-2d {
	border-radius: 5px;
}

.btn-2d:hover {
	box-shadow: 0 8px #ab3c3c;
	top: -2px;
}

.btn-2d:active {
	box-shadow: 0 0 #ab3c3c;
	top: 6px;
}

/* Button 2e */
.btn-2e {
	border-radius: 5px;
	box-shadow: -6px 0 #ab3c3c;
}

.btn-2e:hover {
	box-shadow: -4px 0 #ab3c3c;
	left: -2px;
}

.btn-2e:active {
	box-shadow: 0 0 #ab3c3c;
	left: -6px;
}

/* Button 2f */
.btn-2f {
	border-radius: 5px;
	box-shadow: 6px 0 #ab3c3c;
}

.btn-2f:hover {
	box-shadow: 4px 0 #ab3c3c;
	left: 2px;
}

.btn-2f:active {
	box-shadow: 0 0 #ab3c3c;
	left: 6px;
}

/* Button 2g */
.btn-2g {
	border-radius: 40px;
}

.btn-2g:hover {
	box-shadow: 0 4px #ab3c3c;
	top: 2px;
}

.btn-2g:active {
	box-shadow: 0 0 #ab3c3c;
	top: 6px;
}

/* Button 2h */
.btn-2h {
	border-radius: 20px;
}

.btn-2h:hover {
	box-shadow: 0 4px #ab3c3c;
	top: 2px;
}

.btn-2h:active {
	box-shadow: 0 0 #ab3c3c;
	top: 6px;
}

/* Button 2i */
.btn-2i {
	border-radius: 50%;
	width: 90px;
	height: 90px;
	padding: 0;
}

.btn-2i:hover {
	box-shadow: 0 4px #ab3c3c;
	top: 2px;
}

.btn-2i:active {
	box-shadow: 0 0 #ab3c3c;
	top: 6px;
}

/* Button 2j */
.btn-2j {
	border-radius: 50%;
	width: 90px;
	height: 90px;
	padding: 0;
}

.btn-2j:hover {
	box-shadow: 0 8px #ab3c3c;
	top: -2px;
}

.btn-2j:active {
	box-shadow: 0 0 #ab3c3c;
	top: 6px;
}

/* Button 3 */
.btn-3 {
	background: #fcad26;
	color: #fff;
}

.btn-3:hover {
	background: #f29e0d;
}

.btn-3:active {
	background: #f58500;
	top: 2px;
}

.btn-3:before {
	position: absolute;
	height: 100%;
	left: 0;
	top: 0;
	line-height: 3;
	font-size: 140%;
	width: 60px;
}

/* Button 3a */
.btn-3a {
	padding: 25px 60px 25px 120px;
}

.btn-3a:before {
	background: rgba(0,0,0,0.05);
}

/* Button 3b */
.btn-3b {
	padding: 25px 60px 25px 120px;
	border-radius: 10px;
}

.btn-3b:before {
	border-right: 2px solid rgba(255,255,255,0.5);
}

/* Button 3c */
.btn-3c {
	padding: 80px 20px 20px 20px;
	border-radius: 10px;
	box-shadow: 0 3px #da9622;
}

.btn-3c:active {
	box-shadow: 0 3px #dc7801;
}

.btn-3c:before {
	height: 60px;
	width: 100%;
	line-height: 60px;
	background: #fff;
	color: #f29e0d;
	border-radius: 10px 10px 0 0;
}

.btn-3c:active:before {
	color: #f58500;
}

/* Button 3d */
.btn-3d {
	padding: 25px 60px 25px 120px;
	border-radius: 10px;
}

.btn-3d:before {
	background: #fff;
	color: #fcad26;
	z-index: 2;
	border-radius: 10px 0 0 10px;
}

.btn-3d:after {
	width: 20px;
	height: 20px;
	background: #fff;
	z-index: 1;
	left: 55px;
	top: 50%;
	margin: -10px 0 0 -10px;
	-webkit-transform: rotate(45deg);
	-moz-transform: rotate(45deg);
	-ms-transform: rotate(45deg);
	transform: rotate(45deg);
}

.btn-3d:active:before {
	color: #f58500;
}

.btn-3d:active {
	top: 0;
}

.btn-3d:active:after {
	left: 60px;
}

/* Button 3e */
.btn-3e {
	padding: 25px 120px 25px 60px;
	overflow: hidden;
}

.btn-3e:before {
	left: auto;
	right: 10px;
	z-index: 2;
}

.btn-3e:after {
	width: 30%;
	height: 200%;
	background: rgba(255,255,255,0.1);
	z-index: 1;
	right: 0;
	top: 0;
	margin: -5px 0 0 -5px;
	-webkit-transform-origin: 0 0;
	-webkit-transform: rotate(-20deg);
	-moz-transform-origin: 0 0;
	-moz-transform: rotate(-20deg);
	-ms-transform-origin: 0 0;
	-ms-transform: rotate(-20deg);
	transform-origin: 0 0;
	transform: rotate(-20deg);
}

.btn-3e:hover:after {
	width: 40%;
}

/* Button 4 */
.btn-4 {
	border-radius: 50px;
	border: 3px solid #fff;
	color: #fff;
	overflow: hidden;
}

.btn-4:active {
	border-color: #17954c;
	color: #17954c;
}

.btn-4:hover {
	background: #24b662;
}

.btn-4:before {
	position: absolute;
	height: 100%;
	font-size: 125%;
	line-height: 3.5;
	color: #fff;
	-webkit-transition: all 0.3s;
	-moz-transition: all 0.3s;
	transition: all 0.3s;
}

.btn-4:active:before {
	color: #17954c;
}

/* Button 4a */
.btn-4a:before {
	left: 130%;
	top: 0;
}

.btn-4a:hover:before {
	left: 80%;
}

/* Button 4b */
.btn-4b:before {
	left: -50%;
	top: 0;
}

.btn-4b:hover:before {
	left: 10%;
}

/* Button 4c */
.btn-4c:before {
	left: 70%;
	opacity: 0;
	top: 0;
}

.btn-4c:hover:before {
	left: 80%;
	opacity: 1;
}

/* Button 4d */
.btn-4d:before {
	left: 30%;
	opacity: 0;
	top: 0;
}

.btn-4d:hover:before {
	left: 10%;
	opacity: 1;
}

/* Button 5 */
.btn-5 {
	background: #823aa0;
	color: #fff;
	height: 70px;
	min-width: 260px;
	line-height: 24px;
	font-size: 16px;
	overflow: hidden;
	-webkit-backface-visibility: hidden;
	-moz-backface-visibility: hidden;
	backface-visibility: hidden;
}

.btn-5:active {
	background: #9053a9;
	top: 2px;
}

.btn-5 span {
	display: inline-block;
	width: 100%;
	height: 100%;
	-webkit-transition: all 0.3s;
	-webkit-backface-visibility: hidden;
	-moz-transition: all 0.3s;
	-moz-backface-visibility: hidden;
	transition: all 0.3s;
	backface-visibility: hidden;
}

.btn-5:before {
	position: absolute;
	height: 100%;
	width: 100%;
	line-height: 2.5;
	font-size: 180%;
	-webkit-transition: all 0.3s;
	-moz-transition: all 0.3s;
	transition: all 0.3s;
}

.btn-5:active:before {
	color: #703b87;
}

/* Button 5a */
.btn-5a:hover span {
	-webkit-transform: translateY(300%);
	-moz-transform: translateY(300%);
	-ms-transform: translateY(300%);
	transform: translateY(300%);
}

.btn-5a:before {
	left: 0;
	top: -100%;
}

.btn-5a:hover:before {
	top: 0;
}

/* Button 5b */
.btn-5b:hover span {
	-webkit-transform: translateX(200%);
	-moz-transform: translateX(200%);
	-ms-transform: translateX(200%);
	transform: translateX(200%);
}

.btn-5b:before {
	left: -100%;
	top: 0;
}

.btn-5b:hover:before {
	left: 0;
}

/* Button 6 */
.btn-6 {
	color: #fff;
	background: #226fbe;
	-webkit-transition: none;
	-moz-transition: none;
	transition: none;
}

.btn-6:active {
	top: 2px;
}

/* Button 6a */
.btn-6a {
	border: 4px solid #226fbe;
}

.btn-6a:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6b */
.btn-6b {
	border: 4px solid #226fbe;
	border-radius: 15px;
}

.btn-6b:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6c */
.btn-6c {
	border: 4px solid #226fbe;
	border-radius: 60px;
}

.btn-6c:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6d */
.btn-6d {
	border: 2px dashed #226fbe;
}

.btn-6d:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6e */
.btn-6e {
	border: 2px dashed #226fbe;
	border-radius: 15px;
}

.btn-6e:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6f */
.btn-6f {
	border: 2px dashed #226fbe;
	border-radius: 60px;
}

.btn-6f:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6g */
.btn-6g {
	border: 2px dotted #226fbe;
}

.btn-6g:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6h */
.btn-6h {
	border: 2px dotted #226fbe;
	border-radius: 15px;
}

.btn-6h:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6i */
.btn-6i {
	border: 2px dotted #226fbe;
	border-radius: 60px;
}

.btn-6i:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6j */
.btn-6j {
	border: 4px double #226fbe;
}

.btn-6j:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6k */
.btn-6k {
	border: 4px double #226fbe;
	border-radius: 15px;
}

.btn-6k:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 6l */
.btn-6l {
	border: 4px double #226fbe;
	border-radius: 60px;
}

.btn-6l:hover {
	background: transparent;
	color: #226fbe;
}

/* Button 7 */
.btn-7 {
	background: #17aa56;
	color: #fff;
	border-radius: 7px;
	box-shadow: 0 5px #119e4d;
	padding: 25px 60px 25px 90px;
}

/* Button 7a */
.btn-7a {
	overflow: hidden;
}

.btn-7a:before {
	position: absolute;
	left: 0;
	width: 40%;
	font-size: 160%;
	line-height: 0.8;
	color: #0a833d;
}

.btn-7a.btn-activated {
	-webkit-animation: fadeOutText 0.5s;
	-moz-animation: fadeOutText 0.5s;
	animation: fadeOutText 0.5s;
}

.btn-7a.btn-activated:before {
	-webkit-animation: moveToRight 0.5s;
	-moz-animation: moveToRight 0.5s;
	animation: moveToRight 0.5s;
}

@-webkit-keyframes fadeOutText {
	0% { color: transparent; }
	80% { color: transparent; }
	100% { color: #fff; }
}

@-moz-keyframes fadeOutText {
	0% { color: transparent; }
	80% { color: transparent; }
	100% { color: #fff; }
}

@keyframes fadeOutText {
	0% { color: transparent; }
	80% { color: transparent; }
	100% { color: #fff; }
}

@-webkit-keyframes moveToRight {
	80% { -webkit-transform: translateX(250%); }
	81% { opacity: 1; -webkit-transform: translateX(250%); }
	82% { opacity: 0; -webkit-transform: translateX(250%); }
	83% { opacity: 0; -webkit-transform: translateX(-50%); }
	84% { opacity: 1; -webkit-transform: translateX(-50%);  }
	100% { -webkit-transform: translateX(0%); }
}

@-moz-keyframes moveToRight {
	80% { -moz-transform: translateX(250%); }
	81% { opacity: 1; -moz-transform: translateX(250%); }
	82% { opacity: 0; -moz-transform: translateX(250%); }
	83% { opacity: 0; -moz-transform: translateX(-50%); }
	84% { opacity: 1; -moz-transform: translateX(-50%);  }
	100% { -moz-transform: translateX(0%); }
}

@keyframes moveToRight {
	80% { transform: translateX(250%); }
	81% { opacity: 1; transform: translateX(250%); }
	82% { opacity: 0; transform: translateX(250%); }
	83% { opacity: 0; transform: translateX(-50%); }
	84% { opacity: 1; transform: translateX(-50%);  }
	100% { transform: translateX(0%); }
}

/* Button 7b */
.btn-7b {
	overflow: hidden;
}

.btn-7b:before {
	position: absolute;
	left: 0;
	width: 40%;
	font-size: 160%;
	line-height: 0.8;
	color: #0a833d;
}

.btn-7b.btn-activated:before {
	-webkit-animation: scaleUp 0.5s;
	-moz-animation: scaleUp 0.5s;
	animation: scaleUp 0.5s;
}

@-webkit-keyframes scaleUp {
	80% {
		opacity: 0;
		-webkit-transform: scale(2);
	}
	100% {
		opacity: 0;
		-webkit-transform: scale(2);
	}
}

@-moz-keyframes scaleUp {
	80% {
		opacity: 0;
		-moz-transform: scale(2);
	}
	100% {
		opacity: 0;
		-moz-transform: scale(2);
	}
}

@keyframes scaleUp {
	80% {
		opacity: 0;
		transform: scale(2);
	}
	100% {
		opacity: 0;
		transform: scale(2);
	}
}

/* Icon only style */
.btn-icon-only {
	font-size: 0;
	padding: 25px 30px;
}

.btn-icon-only:before {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	font-size: 26px;
	line-height: 54px;
	-webkit-backface-visibility: hidden;
	-moz-backface-visibility: hidden;
	backface-visibility: hidden;
}

/* Button 7c */
.btn-7c {
	overflow: hidden;
}

.btn-7c:before {
	color: #fff;
	z-index: 1;
}

.btn-7c:after {
	position: absolute;
	top: 0;
	left: 0;
	height: 100%;
	z-index: 0;
	width: 0;
	background: #0a833d;
	-webkit-transition: none;
	-moz-transition: none;
	transition: none;
}

.btn-7c.btn-activated:after {
	-webkit-animation: fillToRight 0.7s forwards;
	-moz-animation: fillToRight 0.7s forwards;
	animation: fillToRight 0.7s forwards;
}

@-webkit-keyframes fillToRight {
	to { 
		width: 100%;
	}
}

@-moz-keyframes fillToRight {
	to { 
		width: 100%;
	}
}

@keyframes fillToRight {
	to { 
		width: 100%;
	}
}

/* Button 7d */
.btn-7d {
	overflow: hidden;
}

.btn-7d:before {
	color: #fff;
	z-index: 1;
}

.btn-7d:after {
	position: absolute;
	top: 0;
	left: 0;
	height: 0;
	width: 100%;
	z-index: 0;
	background: #21bb63;
	-webkit-transition: none;
	-moz-transition: none;
	transition: none;
}

.btn-7d.btn-activated:after {
	-webkit-animation: emptyBottom 0.7s forwards;
	-moz-animation: emptyBottom 0.7s forwards;
	animation: emptyBottom 0.7s forwards;
}

@-webkit-keyframes emptyBottom {
	to { 
		height: 100%;
	}
}

@-moz-keyframes emptyBottom {
	to { 
		height: 100%;
	}
}

@keyframes emptyBottom {
	to { 
		height: 100%;
	}
}

/* Button 7e */
.btn-7e:after {
	position: absolute;
	width: 100%;
	height: 100%;
	left: 0;
	top: 0;
	z-index: 1;
	font-size: 26px;
	line-height: 54px;
	color: #ea515e;
	-webkit-transform: scale(0);
	-moz-transform: scale(0);
	-ms-transform: scale(0);
	transform: scale(0);
	opacity: 0;
	-webkit-transition: none;
	-moz-transition: none;
	transition: none;
}

.btn-7e.btn-activated:after {
	-webkit-animation: scaleFade 0.5s forwards;
	-moz-animation: scaleFade 0.5s forwards;
	animation: scaleFade 0.5s forwards;
} 

@-webkit-keyframes scaleFade {
	50% { 
		opacity: 1;
		-webkit-transform: scale(1);
	}
	100% {
		opacity: 0;
		-webkit-transform: scale(2.5);
	}
}

@-moz-keyframes scaleFade {
	50% { 
		opacity: 1;
		-moz-transform: scale(1);
	}
	100% {
		opacity: 0;
		-moz-transform: scale(2.5);
	}
}

@keyframes scaleFade {
	50% { 
		opacity: 1;
		transform: scale(1);
	}
	100% {
		opacity: 0;
		transform: scale(2.5);
	}
}

/* Button 7f */
.btn-7f:before {
	-webkit-text-stroke-width: 1px;
	-webkit-text-stroke-color: #fff;
}
.btn-7f:after {
	position: absolute;
	width: 100%;
	height: 100%;
	left: 0;
	top: 0;
	z-index: 1;
	font-size: 26px;
	line-height: 54px;
	color: #ffe44d;
	visibility: hidden;
	-webkit-text-stroke-width: 1px;
	-webkit-text-stroke-color: #ffe44d;
	-webkit-transform: scale(4);
	-moz-transform: scale(4);
	-ms-transform: scale(4);
	transform: scale(4);
	opacity: 0;
	-webkit-transition: none;
	-moz-transition: none;
	transition: none;
}

.btn-7f.btn-activated:after {
	visibility: visible;
	-webkit-animation: dropDown 0.3s forwards;
	-moz-animation: dropDown 0.3s forwards;
	animation: dropDown 0.3s forwards;
} 

@-webkit-keyframes dropDown {
	to { 
		opacity: 1;
		-webkit-transform: scale(1);
	}
}

@-moz-keyframes dropDown {
	to { 
		opacity: 1;
		-moz-transform: scale(1);
	}
}

@keyframes dropDown {
	to { 
		opacity: 1;
		transform: scale(1);
	}
}

/* Button 7g */
.btn-7g:after {
	position: absolute;
	width: 100%;
	height: 100%;
	left: 0;
	top: 0;
	z-index: 1;
	font-size: 26px;
	line-height: 54px;
	color: #0a833d;
	visibility: hidden;
	-webkit-transform: scale(2);
	-moz-transform: scale(2);
	-ms-transform: scale(2);
	transform: scale(2);
	opacity: 0;
	-webkit-transition: none;
	-moz-transition: none;
	transition: none;
}

.btn-7g.btn-activated:after {
	visibility: visible;
	-webkit-animation: dropDownFade 0.5s forwards;
	-moz-animation: dropDownFade 0.5s forwards;
	animation: dropDownFade 0.5s forwards;
} 

@-webkit-keyframes dropDownFade {
	50% { 
		opacity: 1;
		-webkit-transform: scale(1);
	}
	100% { 
		opacity: 0;
		-webkit-transform: scale(1.5);
	}
}

@-moz-keyframes dropDownFade {
	50% { 
		opacity: 1;
		-moz-transform: scale(1);
	}
	100% { 
		opacity: 0;
		-moz-transform: scale(1.5);
	}
}

@keyframes dropDownFade {
	50% { 
		opacity: 1;
		transform: scale(1);
	}
	100% { 
		opacity: 0;
		transform: scale(1.5);
	}
}

/* Button 7h */

.btn-7h span {
	display: inline-block;
	width: 100%;
}

.btn-7h:before {
	position: absolute;
	left: 0;
	width: 40%;
	font-size: 160%;
	line-height: 0.8;
	color: #0a833d;
}

/* Success and error */

.btn-success,
.btn-error {
	color: transparent;
}

.btn-success:after,
.btn-error:after {
	z-index: 1;
	color: #fff;
	left: 40%;
}

.btn-success:before {
	content: "\e001";
}

.btn-success:after {
	content: "Success!";
	-webkit-animation: moveUp 0.5s;
	-moz-animation: moveUp 0.5s;
	animation: moveUp 0.5s;
}

@-webkit-keyframes moveUp {
	0% {
		-webkit-transform: translateY(50%);
		opacity: 0;
	}
	100% { 
		opacity: 1;
		-webkit-transform: translateY(0);
	}
}

@-moz-keyframes moveUp {
	0% {
		-moz-transform: translateY(50%);
		opacity: 0;
	}
	100% { 
		opacity: 1;
		-moz-transform: translateY(0);
	}
}

@keyframes moveUp {
	0% {
		transform: translateY(50%);
		opacity: 0;
	}
	100% { 
		opacity: 1;
		transform: translateY(0);
	}
}

.btn-error {
	-webkit-animation: shake 0.5s;
	-moz-animation: shake 0.5s;
	animation: shake 0.5s;
}

/* From Dan Eden's animate.css: https://daneden.me/animate/ */
@-webkit-keyframes shake {
	0%, 100% {-webkit-transform: translateX(0);}
	10%, 30%, 50%, 70%, 90% {-webkit-transform: translateX(-10px);}
	20%, 40%, 60%, 80% {-webkit-transform: translateX(10px);}
}

@-moz-keyframes shake {
	0%, 100% {-moz-transform: translateX(0);}
	10%, 30%, 50%, 70%, 90% {-moz-transform: translateX(-10px);}
	20%, 40%, 60%, 80% {-moz-transform: translateX(10px);}
}

@keyframes shake {
	0%, 100% {transform: translateX(0);}
	10%, 30%, 50%, 70%, 90% {transform: translateX(-10px);}
	20%, 40%, 60%, 80% {transform: translateX(10px);}
}

.btn-error:before {
	content: "\e002";
}

.btn-error:after {
	content: "Error!";
	-webkit-animation: scaleFromUp 0.5s;
	-moz-animation: scaleFromUp 0.5s;
	animation: scaleFromUp 0.5s;
}

@-webkit-keyframes scaleFromUp {
	0% {
		-webkit-transform: scale(0);
		opacity: 0;
	}
	100% { 
		opacity: 1;
		-webkit-transform: scale(1);
	}
}

@-moz-keyframes scaleFromUp {
	0% {
		-moz-transform: scale(0);
		opacity: 0;
	}
	100% { 
		opacity: 1;
		-moz-transform: scale(1);
	}
}

@keyframes scaleFromUp {
	0% {
		transform: scale(0);
		opacity: 0;
	}
	100% { 
		opacity: 1;
		transform: scale(1);
	}
}

/* Special trash effect */
.trash-effect {
	position: relative;
	max-width: 320px;
	margin: 60px auto 0;
} 

.trash-effect .icon-file {
	font-size: 30px;
	position: absolute;
	width: 50px;
	height: 50px;
	left: 50%;
	top: 50%;
	margin: -45px 0 0 -25px;
	-webkit-transition: all 0.3s ease-out;
	-moz-transition: all 0.3s ease-out;
	transition: all 0.3s ease-out;
	-webkit-transform: translateX(90px) translateY(20px) scale(1);
	-moz-transform: translateX(90px) translateY(20px) scale(1);
	-ms-transform: translateX(90px) translateY(20px) scale(1);
	transform: translateX(90px) translateY(20px) scale(1);
}

.trash-effect .icon-file:nth-child(2) {
	-webkit-transform: translateX(140px) translateY(-10px) scale(1);
	-moz-transform: translateX(140px) translateY(-10px) scale(1);
	-ms-transform: translateX(140px) translateY(-10px) scale(1);
	transform: translateX(140px) translateY(-10px) scale(1);
	-webkit-transition-delay: 0.1s;
	-moz-transition-delay: 0.1s;
	transition-delay: 0.1s;
}

.trash-effect .icon-file:nth-child(3) {
	-webkit-transform: translateX(140px) translateY(50px) scale(1);
	-moz-transform: translateX(140px) translateY(50px) scale(1);
	-ms-transform: translateX(140px) translateY(50px) scale(1);
	transform: translateX(140px) translateY(50px) scale(1);
	-webkit-transition-delay: 0.2s;
	-moz-transition-delay: 0.2s;
	transition-delay: 0.2s;
}

.trash-effect.trash-effect-active .icon-file {
	-webkit-transform: translateX(-100px) translateY(-10px) scale(0);
	-moz-transform: translateX(-100px) translateY(-10px) scale(0);
	-ms-transform: translateX(-100px) translateY(-10px) scale(0);
	transform: translateX(-100px) translateY(-10px) scale(0);
}

/* Button 7i */
.btn-7i {
	box-shadow: none;
	border-radius: 0 0 7px 7px;
	padding: 27px 33px;
	-webkit-transform: translateX(-100px);
	-moz-transform: translateX(-100px);
	-ms-transform: translateX(-100px);
	transform: translateX(-100px);
}

.btn-7i:before {
	line-height: 45px;
}

.btn-7i:after {
	height: 11px; /* should be 10px but in Chrome Version 34.0.1847.131 there's a gap because of the transform of the button */
	width: 100%;
	background: #17aa56;
	border-radius: 7px 7px 0 0;
	left: 0;
	top: -10px;
	z-index: 1;
	-webkit-transform-origin: 0 100%;
	-moz-transform-origin: 0 100%;
	-ms-transform-origin: 0 100%;
	transform-origin: 0 100%;
}

.trash-effect-active .btn-7i:after {
	-webkit-animation: openTrash 0.5s;
	-moz-animation: openTrash 0.5s;
	animation: openTrash 0.5s;
}

@-webkit-keyframes openTrash {
	50% {
		-webkit-transform: rotate(-35deg);
	}
	100% { 
		-webkit-transform: rotate(0deg);
	}
}

@-moz-keyframes openTrash {
	50% {
		-moz-transform: rotate(-35deg);
	}
	100% { 
		-moz-transform: rotate(0deg);
	}
}

@keyframes openTrash {
	50% {
		transform: rotate(-35deg);
	}
	100% { 
		transform: rotate(0deg);
	}
}

/* Button 8 */
.perspective {
	-webkit-perspective: 800px;
	-moz-perspective: 800px;
	perspective: 800px;
	display: inline-block;
}

.btn-8 {
	display: block;
	background: #5cbcf6;
	outline: 1px solid transparent; /* FF jagged edges fix */
	-webkit-transform-style: preserve-3d;
	-moz-transform-style: preserve-3d;
	transform-style: preserve-3d;
}

.btn-8:active {
	background: #55b7f3;
}

/* Button 8a */
.btn-8a:after {
	width: 100%;
	height: 42%; /* should be 40% but there's a gap in Chrome Version 34.0.1847.131 */
	left: 0;
	top: -40%;
	background: #49a7df;
	-webkit-transform-origin: 0% 100%;
	-webkit-transform: rotateX(90deg);
	-moz-transform-origin: 0% 100%;
	-moz-transform: rotateX(90deg);
	transform-origin: 0% 100%;
	transform: rotateX(90deg);
}

.btn-8a:hover {
	-webkit-transform: rotateX(-15deg);
	-moz-transform: rotateX(-15deg);
	-ms-transform: rotateX(-15deg);
	transform: rotateX(-15deg);
}

/* Button 8b */
.btn-8b:after {
	width: 100%;
	height: 40%;
	left: 0;
	top: 100%;
	background: #49a7df;
	-webkit-transform-origin: 0% 0%;
	-webkit-transform: rotateX(-90deg);
	-moz-transform-origin: 0% 0%;
	-moz-transform: rotateX(-90deg);
	-ms-transform-origin: 0% 0%;
	-ms-transform: rotateX(-90deg);
	transform-origin: 0% 0%;
	transform: rotateX(-90deg);
}

.btn-8b:hover {
	-webkit-transform: rotateX(15deg);
	-moz-transform: rotateX(15deg);
	-ms-transform: rotateX(15deg);
	transform: rotateX(15deg);
}

/* Button 8c */
.btn-8c:after {
	width: 21%; /* should be 20% but there's a gap in Chrome Version 34.0.1847.131 */
	height: 100%;
	left: -20%;
	top: 0;
	background: #49a7df;
	-webkit-transform-origin: 100% 0%;
	-webkit-transform: rotateY(-90deg);
	-moz-transform-origin: 100% 0%;
	-moz-transform: rotateY(-90deg);
	-ms-transform-origin: 100% 0%;
	-ms-transform: rotateY(-90deg);
	transform-origin: 100% 0%;
	transform: rotateY(-90deg);
}

.btn-8c:hover {
	-webkit-transform: rotateY(15deg);
	-moz-transform: rotateY(15deg);
	-ms-transform: rotateY(15deg);
	transform: rotateY(15deg);
}

/* Button 8d */
.btn-8d:after {
	width: 20%;
	height: 100%;
	left: 100%;
	top: 0;
	background: #49a7df;
	-webkit-transform-origin: 0% 0%;
	-webkit-transform: rotateY(90deg);
	-moz-transform-origin: 0% 0%;
	-moz-transform: rotateY(90deg);
	-ms-transform-origin: 0% 0%;
	-ms-transform: rotateY(90deg);
	transform-origin: 0% 0%;
	transform: rotateY(90deg);
}

.btn-8d:hover {
	-webkit-transform: rotateY(-15deg);
	-moz-transform: rotateY(-15deg);
	-ms-transform: rotateY(-15deg);
	transform: rotateY(-15deg);
}

/* Button 8e */
.btn-8e {
	-webkit-transform: rotateX(-15deg);
	-moz-transform: rotateX(-15deg);
	-ms-transform: rotateX(-15deg);
	transform: rotateX(-15deg);
}

.btn-8e:after {
	width: 100%;
	height: 42%; /* should be 40% but there's a gap in Chrome Version 34.0.1847.131 */
	left: 0;
	top: -40%;
	background: #49a7df;
	-webkit-transform-origin: 0% 100%;
	-webkit-transform: rotateX(90deg);
	-moz-transform-origin: 0% 100%;
	-moz-transform: rotateX(90deg);
	-ms-transform-origin: 0% 100%;
	-ms-transform: rotateX(90deg);
	transform-origin: 0% 100%;
	transform: rotateX(90deg);
}

.btn-8e:active {
	-webkit-transform: rotateX(0deg);
	-moz-transform: rotateX(0deg);
	-ms-transform: rotateX(0deg);
	transform: rotateX(0deg);
}

/* Button 8f */
.btn-8f {
	-webkit-transform: rotateX(15deg);
	-moz-transform: rotateX(15deg);
	-ms-transform: rotateX(15deg);
	transform: rotateX(15deg);
}

.btn-8f:after {
	width: 100%;
	height: 40%;
	left: 0;
	top: 100%;
	background: #49a7df;
	-webkit-transform-origin: 0% 0%;
	-webkit-transform: rotateX(-90deg);
	-moz-transform-origin: 0% 0%;
	-moz-transform: rotateX(-90deg);
	-ms-transform-origin: 0% 0%;
	-ms-transform: rotateX(-90deg);
	transform-origin: 0% 0%;
	transform: rotateX(-90deg);
}

.btn-8f:active {
	-webkit-transform: rotateX(0deg);
	-moz-transform: rotateX(0deg);
	-ms-transform: rotateX(0deg);
	transform: rotateX(0deg);
}

/* Button 8g */
.btn-8g {
	background: #fff;
	color: #999;
}

.btn-8g:active {
	background: #fff;
}

.btn-8g:after,
.btn-8g:before {
	text-transform: uppercase;
	width: 100%;
	height: 100%;
	position: absolute;
	left: 0;
	line-height: 70px;
}

.btn-8g:after {
	top: -98%; /* should be -100% but there's a gap in Chrome Version 34.0.1847.131 */
	background: #7aca7c;
	color: #358337;
	content: 'It worked!';
	-webkit-transform-origin: 0% 100%;
	-webkit-transform: rotateX(90deg);
	-moz-transform-origin: 0% 100%;
	-moz-transform: rotateX(90deg);
	-ms-transform-origin: 0% 100%;
	-ms-transform: rotateX(90deg);
	transform-origin: 0% 100%;
	transform: rotateX(90deg);
}

.btn-8g:before {
	top: 100%;
	background: #e96a6a;
	color: #a33a3a;
	content: 'Error!';
	font-weight: 700;
	font-family: 'Lato', Calibri, Arial, sans-serif;
	-webkit-transform-origin: 0% 0%;
	-webkit-transform: rotateX(-90deg);
	-moz-transform-origin: 0% 0%;
	-moz-transform: rotateX(-90deg);
	-ms-transform-origin: 0% 0%;
	-ms-transform: rotateX(-90deg);
	transform-origin: 0% 0%;
	transform: rotateX(-90deg);
}

.btn-8g.btn-success3d {
	background: #aaa;
	-webkit-transform-origin: 50% 100%;
	-webkit-transform: rotateX(-90deg) translateY(100%);
	-moz-transform-origin: 50% 100%;
	-moz-transform: rotateX(-90deg) translateY(100%);
	-ms-transform-origin: 50% 100%;
	-ms-transform: rotateX(-90deg) translateY(100%);
	transform-origin: 50% 100%;
	transform: rotateX(-90deg) translateY(100%);
}

.btn-8g.btn-error3d  {
	background: #aaa;
	-webkit-transform-origin: 50% 0%;
	-webkit-transform: rotateX(90deg) translateY(-100%);
	-moz-transform-origin: 50% 0%;
	-moz-transform: rotateX(90deg) translateY(-100%);
	-ms-transform-origin: 50% 0%;
	-ms-transform: rotateX(90deg) translateY(-100%);
	transform-origin: 50% 0%;
	transform: rotateX(90deg) translateY(-100%);
}
!

JS 

              
                var buttons7Click = Array.prototype.slice.call( document.querySelectorAll( '#btn-click button' ) ),
				buttons9Click = Array.prototype.slice.call( document.querySelectorAll( 'button.btn-8g' ) ),
				totalButtons7Click = buttons7Click.length,
				totalButtons9Click = buttons9Click.length;

			buttons7Click.forEach( function( el, i ) { el.addEventListener( 'click', activate, false ); } );
			buttons9Click.forEach( function( el, i ) { el.addEventListener( 'click', activate, false ); } );

			function activate() {
				var self = this, activatedClass = 'btn-activated';

				if( classie.has( this, 'btn-7h' ) ) {
					// if it is the first of the two btn-7h then activatedClass = 'btn-error';
					// if it is the second then activatedClass = 'btn-success'
					activatedClass = buttons7Click.indexOf( this ) === totalButtons7Click-2 ? 'btn-error' : 'btn-success';
				}
				else if( classie.has( this, 'btn-8g' ) ) {
					// if it is the first of the two btn-8g then activatedClass = 'btn-success3d';
					// if it is the second then activatedClass = 'btn-error3d'
					activatedClass = buttons9Click.indexOf( this ) === totalButtons9Click-2 ? 'btn-success3d' : 'btn-error3d';
				}

				if( !classie.has( this, activatedClass ) ) {
					classie.add( this, activatedClass );
					setTimeout( function() { classie.remove( self, activatedClass ) }, 1000 );
				}
			}

			document.querySelector( '.btn-7i' ).addEventListener( 'click', function() {
				classie.add( document.querySelector( '#trash-effect' ), 'trash-effect-active' );
			}, false );
!
999px

Console