.button{
	height: 20px;
margin: 0px 30px;
cursor: pointer;
display: inline-block;
color: #006400;
font-size: 12px;
background: #EEE none repeat scroll 0% 0%;
border-radius: 4px;
line-height: 19px;
border: 1px solid #AAA;
text-decoration: none;
transition: all 0.3s linear 0s;
padding: 0px 7px 0px 7px;
		
	-webkit-transition: all 0.3s linear;
     -khtml-transition: all 0.3s linear;
       -moz-transition: all 0.3s linear;
         -o-transition: all 0.3s linear;
            transition: all 0.3s linear;
}
As you can see above the CSS is quite basic setting the height and padding of the button. Within the button CSS class we are also adding the CSS transition property, this is used to fade in the box shadow on the hover event.

Button Colors
The following is the CSS background gradients used for all the buttons.

/***********************************************************************
 * 	Green Background
 **********************************************************************/
.green{
	background: #cdeb8e; /* Old browsers */
	background: -moz-linear-gradient(top, #cdeb8e 0%, #a5c956 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#cdeb8e), color-stop(100%,#a5c956)); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(top, #cdeb8e 0%,#a5c956 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(top, #cdeb8e 0%,#a5c956 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(top, #cdeb8e 0%,#a5c956 100%); /* IE10+ */
	background: linear-gradient(top, #cdeb8e 0%,#a5c956 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#cdeb8e', endColorstr='#a5c956',GradientType=0 ); /* IE6-9 */
}

/***********************************************************************
 * 	Red Background
 **********************************************************************/
.red{
	background: #ff3019; /* Old browsers */
	background: -moz-linear-gradient(top, #ff3019 0%, #cf0404 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ff3019), color-stop(100%,#cf0404)); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(top, #ff3019 0%,#cf0404 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(top, #ff3019 0%,#cf0404 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(top, #ff3019 0%,#cf0404 100%); /* IE10+ */
	background: linear-gradient(top, #ff3019 0%,#cf0404 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ff3019', endColorstr='#cf0404',GradientType=0 ); /* IE6-9 */
}

/***********************************************************************
 * 	Yellow Background
 **********************************************************************/
.yellow{
	background: #ffd65e; /* Old browsers */
	background: -moz-linear-gradient(top, #ffd65e 0%, #febf04 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ffd65e), color-stop(100%,#febf04)); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(top, #ffd65e 0%,#febf04 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(top, #ffd65e 0%,#febf04 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(top, #ffd65e 0%,#febf04 100%); /* IE10+ */
	background: linear-gradient(top, #ffd65e 0%,#febf04 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffd65e', endColorstr='#febf04',GradientType=0 ); /* IE6-9 */
}

/***********************************************************************
 * 	Grey Background
 **********************************************************************/
.grey{
	background: rgb(238,238,238); /* Old browsers */
	background: -moz-linear-gradient(left, rgba(238,238,238,1) 0%, rgba(204,204,204,1) 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(238,238,238,1)), color-stop(100%,rgba(204,204,204,1))); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(left, rgba(238,238,238,1) 0%,rgba(204,204,204,1) 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(left, rgba(238,238,238,1) 0%,rgba(204,204,204,1) 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(left, rgba(238,238,238,1) 0%,rgba(204,204,204,1) 100%); /* IE10+ */
	background: linear-gradient(left, rgba(238,238,238,1) 0%,rgba(204,204,204,1) 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#eeeeee', endColorstr='#cccccc',GradientType=1 ); /* IE6-9 */
}

/***********************************************************************
 * 	Black Background
 **********************************************************************/
.black{
	background: #7d7e7d; /* Old browsers */
	background: -moz-linear-gradient(top, #7d7e7d 0%, #0e0e0e 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#7d7e7d), color-stop(100%,#0e0e0e)); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(top, #7d7e7d 0%,#0e0e0e 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(top, #7d7e7d 0%,#0e0e0e 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(top, #7d7e7d 0%,#0e0e0e 100%); /* IE10+ */
	background: linear-gradient(top, #7d7e7d 0%,#0e0e0e 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#7d7e7d', endColorstr='#0e0e0e',GradientType=0 ); /* IE6-9 */
}

/***********************************************************************
 * 	Brown Background
 **********************************************************************/
.brown{
	background: #f6e6b4; /* Old browsers */
	background: -moz-linear-gradient(top, #f6e6b4 0%, #ed9017 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#f6e6b4), color-stop(100%,#ed9017)); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(top, #f6e6b4 0%,#ed9017 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(top, #f6e6b4 0%,#ed9017 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(top, #f6e6b4 0%,#ed9017 100%); /* IE10+ */
	background: linear-gradient(top, #f6e6b4 0%,#ed9017 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f6e6b4', endColorstr='#ed9017',GradientType=0 ); /* IE6-9 */
}

/***********************************************************************
 * 	Blue Background
 **********************************************************************/
.blue{
	background: #7abcff; /* Old browsers */
	background: -moz-linear-gradient(top, #7abcff 0%, #60abf8 44%, #4096ee 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#7abcff), color-stop(44%,#60abf8), color-stop(100%,#4096ee)); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* IE10+ */
	background: linear-gradient(top, #7abcff 0%,#60abf8 44%,#4096ee 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#7abcff', endColorstr='#4096ee',GradientType=0 ); /* IE6-9 */
}

/***********************************************************************
 * 	Dark Red Background
 **********************************************************************/
.darkred{
	background: rgb(169,3,41); /* Old browsers */
	background: -moz-linear-gradient(left, rgba(169,3,41,1) 0%, rgba(143,2,34,1) 44%, rgba(109,0,25,1) 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(169,3,41,1)), color-stop(44%,rgba(143,2,34,1)), color-stop(100%,rgba(109,0,25,1))); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(left, rgba(169,3,41,1) 0%,rgba(143,2,34,1) 44%,rgba(109,0,25,1) 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(left, rgba(169,3,41,1) 0%,rgba(143,2,34,1) 44%,rgba(109,0,25,1) 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(left, rgba(169,3,41,1) 0%,rgba(143,2,34,1) 44%,rgba(109,0,25,1) 100%); /* IE10+ */
	background: linear-gradient(left, rgba(169,3,41,1) 0%,rgba(143,2,34,1) 44%,rgba(109,0,25,1) 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#a90329', endColorstr='#6d0019',GradientType=1 ); /* IE6-9 */
}

/***********************************************************************
 * 	Purple Background
 **********************************************************************/
.purple{
	background: rgb(203,96,179); /* Old browsers */
	background: -moz-linear-gradient(left, rgba(203,96,179,1) 0%, rgba(173,18,131,1) 50%, rgba(222,71,172,1) 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(203,96,179,1)), color-stop(50%,rgba(173,18,131,1)), color-stop(100%,rgba(222,71,172,1))); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(left, rgba(203,96,179,1) 0%,rgba(173,18,131,1) 50%,rgba(222,71,172,1) 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(left, rgba(203,96,179,1) 0%,rgba(173,18,131,1) 50%,rgba(222,71,172,1) 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(left, rgba(203,96,179,1) 0%,rgba(173,18,131,1) 50%,rgba(222,71,172,1) 100%); /* IE10+ */
	background: linear-gradient(left, rgba(203,96,179,1) 0%,rgba(173,18,131,1) 50%,rgba(222,71,172,1) 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#cb60b3', endColorstr='#de47ac',GradientType=1 ); /* IE6-9 */
}

.button:hover{
	-webkit-box-shadow:rgba(0,0,0,0.7) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
     -khtml-box-shadow:rgba(0,0,0,0.7) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
       -moz-box-shadow:rgba(0,0,0,0.7) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
         -o-box-shadow:rgba(0,0,0,0.7) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
            box-shadow:rgba(0,0,0,0.7) 0px 5px 15px, inset rgba(0,0,0,0.15) 0px -10px 20px;
			color:white;
}

.button:active {
    -webkit-box-shadow: rgba(255,255,255,0.25) 0px 1px 0px, inset rgba(255,255,255,0.03) 0px 20px 0px, inset rgba(0,0,0,0.15) 0px -20px 20px, inset rgba(255,255,255,0.05) 0px 20px 20px;
     -khtml-box-shadow: rgba(255,255,255,0.25) 0px 1px 0px, inset rgba(255,255,255,0.03) 0px 20px 0px, inset rgba(0,0,0,0.15) 0px -20px 20px, inset rgba(255,255,255,0.05) 0px 20px 20px;
       -moz-box-shadow: rgba(255,255,255,0.25) 0px 1px 0px, inset rgba(255,255,255,0.03) 0px 20px 0px, inset rgba(0,0,0,0.15) 0px -20px 20px, inset rgba(255,255,255,0.05) 0px 20px 20px;
         -o-box-shadow: rgba(255,255,255,0.25) 0px 1px 0px, inset rgba(255,255,255,0.03) 0px 20px 0px, inset rgba(0,0,0,0.15) 0px -20px 20px, inset rgba(255,255,255,0.05) 0px 20px 20px;
            box-shadow: rgba(255,255,255,0.25) 0px 1px 0px, inset rgba(255,255,255,0.03) 0px 20px 0px, inset rgba(0,0,0,0.15) 0px -20px 20px, inset rgba(255,255,255,0.05) 0px 20px 20px;
    text-shadow:1px 1px 1px #eee;
}

.light {
    display: block;
    position: relative;
    background: -moz-linear-gradient(left, rgba(255,255,255,0) 0%, rgba(255,255,255,0.9) 50%, rgba(255,255,255,0) 100%); /* FF3.6+ */
	background: -webkit-gradient(linear, left top, right top, color-stop(0%,rgba(255,255,255,0)), color-stop(50%,rgba(255,255,255,0.9)), color-stop(100%,rgba(255,255,255,0))); /* Chrome,Safari4+ */
	background: -webkit-linear-gradient(left, rgba(255,255,255,0) 0%,rgba(255,255,255,0.9) 50%,rgba(255,255,255,0) 100%); /* Chrome10+,Safari5.1+ */
	background: -o-linear-gradient(left, rgba(255,255,255,0) 0%,rgba(255,255,255,0.9) 50%,rgba(255,255,255,0) 100%); /* Opera 11.10+ */
	background: -ms-linear-gradient(left, rgba(255,255,255,0) 0%,rgba(255,255,255,0.9) 50%,rgba(255,255,255,0) 100%); /* IE10+ */
	background: linear-gradient(left, rgba(255,255,255,0) 0%,rgba(255,255,255,0.9) 50%,rgba(255,255,255,0) 100%); /* W3C */
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00ffffff', endColorstr='#00ffffff',GradientType=1 ); /* IE6-9 */
    padding: 1px 9px;
    top: -16px;
    left: -53px;
    height: 0px;
}

.button:hover .light{
	
	padding:1px 5px;
  
    -webkit-animation-name: shine;
    -webkit-animation-duration: 0.6s;
    -webkit-animation-timing-function: linear;
    -khtml-animation-name: shine;
    -khtml-animation-duration: 0.6s;
    -khtml-animation-timing-function: linear;
    -moz-animation-name: shine;
    -moz-animation-duration: 0.6s;
    -moz-animation-timing-function: linear;
    -o-animation-name: shine;
    -o-animation-duration: 0.6s;
    -o-animation-timing-function: linear;
    -webkit-animation-name: shine;
    -webkit-animation-duration: 0.6s;
    -webkit-animation-timing-function: linear;
    left:45px;
}

@-webkit-keyframes shine {
    0% { top: -15px; left: -48px; }
    10% { top: -5px; }
    20% { top: 5px; }
    30% { top: 15px; }
    40% { top: 25px; }
    50% { top: 35px; }
    60% { top: 25px; }
    70% { top: 15px; }
    80% { top: 5px; }
    90% { top: -5px; }
    100% { top:-15px; left:45px; -webkit-transform: rotate(-360deg); }
}

@-khtml-keyframes shine {
    0% { top: -15px; left: -48px; }
    10% { top: -5px; }
    20% { top: 5px; }
    30% { top: 15px; }
    40% { top: 25px; }
    50% { top: 35px; }
    60% { top: 25px; }
    70% { top: 15px; }
    80% { top: 5px; }
    90% { top: -5px; }
    100% { top:-15px; left:45px; -khtml-transform: rotate(-360deg); }
}

@-moz-keyframes shine {
    0% { top: -15px; left: -48px; }
    10% { top: -5px; }
    20% { top: 5px; }
    30% { top: 15px; }
    40% { top: 25px; }
    50% { top: 35px; }
    60% { top: 25px; }
    70% { top: 15px; }
    80% { top: 5px; }
    90% { top: -5px; }
    100% { top:-15px; left:45px; -moz-transform: rotate(-360deg); }
}

@-o-keyframes shine {
    0% { top: -15px; left: -48px; }
    10% { top: -5px; }
    20% { top: 5px; }
    30% { top: 15px; }
    40% { top: 25px; }
    50% { top: 35px; }
    60% { top: 25px; }
    70% { top: 15px; }
    80% { top: 5px; }
    90% { top: -5px; }
    100% { top:-15px; left:45px; -o-transform: rotate(-360deg); }
}

@-keyframes shine {
    0% { top: -15px; left: -48px; }
    10% { top: -5px; }
    20% { top: 5px; }
    30% { top: 15px; }
    40% { top: 25px; }
    50% { top: 35px; }
    60% { top: 25px; }
    70% { top: 15px; }
    80% { top: 5px; }
    90% { top: -5px; }
    100% { top:-15px; left:45px; transform: rotate(-360deg); }
}