<div id="buttonwrap">
<a id="button" href="http://vagabundia.blogspot.com/2011/08/transiciones-combinadas.html">
CSS3</a></div>

<style>
#buttonwrap {
margin: 0 auto;
text-align: center;
width: 600px;
}
#button {
-moz-transform: rotate(720deg);
-webkit-transform: rotate(720deg);
-o-transform: rotate(720deg);
-ms-transform: rotate(720deg);
-moz-transition: all 0.5s cubic-bezier(1, 0.8, 0.5, 1) 0.5s;
-webkit-transition: all 0.5s cubic-bezier(1, 0.8, 0.5, 1) 0.5s;
-o-transition: all 0.5s cubic-bezier(1, 0.8, 0.5, 1) 0.5s;
-moz-background-clip: padding;
-webkit-background-clip: padding;
background-clip: padding-box;
background-image: -moz-linear-gradient(center top , #FDDDFD, #A182F8);
-webkit-gradient(linear,left top,left bottom,color-stop(0, #FDDDFD),color-stop(1, #A182F8));
border: 5px solid #AE5BAD;
border-radius: 25px;
color: #FFF;
display: block;
font-family: Tahoma;
font-size: 60px;
font-weight: 300;
margin: 80px auto;
padding: 60px 15px;
position: relative;
text-decoration: none;
text-shadow: 5px 3px 1px rgba(0, 0, 0, 0.5);
width: 150px;
z-index: 1;
}
#button:hover {
-moz-transform: rotate(0deg);
-webkit-transform: rotate(0deg);
-o-transform: rotate(0deg);
-ms-transform: rotate(0deg);
-moz-transition: padding 0.2s ease 0s, top 0.2s ease 0s;
-webkit-transition: padding 0.2s ease 0s, top 0.2s ease 0s;
-o-transition: padding 0.2s ease 0s, top 0.2s ease 0s;
background-image: -moz-linear-gradient(center top , #fdddfd, #fdddfd, #a182f8);
background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, #FDDDFD),color-stop(0.2, #FDDDFD),color-stop(1, #a182f8));
padding: 70px 30px;
top: -10px;
}
#button:after {
bottom: 0;
content: "";
left: 0;
position: absolute;
right: 0;
top: 0;
z-index: -1;
}
#button:before {
-moz-transition: all 0.2s ease 0s;
-wekit-transition: all 0.2s ease 0s;
-o-transition: all 0.2s ease 0s;
border-radius: 35px;
bottom: -30px;
box-shadow: 0 0 100px rgba(255, 255, 255, 0.1) inset;
content: "";
left: -30px;
position: absolute;
right: -30px;
top: -30px;
z-index: -2;
}
#button:hover:before {
bottom: -20px;
box-shadow: 0 0 100px rgba(255, 255, 255, 0.2) inset;
left: -20px;
right: -20px;
top: -20px;
}
#button:active {
box-shadow: 0 0 30px rgba(255, 255, 255, 0.8) inset;
}
</style>