.a-btn{
    width:100px;
    height:100px;
    -webkit-border-radius:50%;
    -moz-border-radius:50%;
    border-radius:50%;
    display:block;
    margin-top:30px;
    left:50%;
    margin-left: -50px;
    background:#f0ad4e;
    position:relative;
    -webkit-box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  0px 0px 1px 8px rgba(188, 188, 188, 0.4), 0px 0px 0px 9px #fff;
    -moz-box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  0px 0px 1px 8px rgba(188, 188, 188, 0.4), 0px 0px 0px 9px #fff;
    box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  0px 0px 1px 8px rgba(188, 188, 188, 0.4), 0px 0px 0px 9px #fff;
    -webkit-transition:all 0.3s linear;
    -moz-transition:all 0.3s linear;
    -o-transition:all 0.3s linear;
    transition:all 0.3s linear;
}
.a-btn span{
    display:table-cell;
    width:100px;
    height:100px;
    padding:20px;
    text-align:center;
    vertical-align:middle;
    font-size:26px;
    color:#fff;
    text-shadow:0px 1px 1px #A03F16;
    font-family:"Arvo", "Myriad Pro", "Trebuchet MS", sans-serif;
    -webkit-transition:all 0.3s linear;
    -moz-transition:all 0.3s linear;
    -o-transition:all 0.3s linear;
    transition:all 0.3s linear;
}
.a-btn span:nth-child(1),
.a-btn span:nth-child(3){
    position:absolute;
    top:0px;
    left:0px;
    font-size:40px;
    line-height:36px;
    opacity:0;
}
.a-btn span:nth-child(1){
    background:transparent url(/static/img/star.png) no-repeat center center;
    opacity:0.2;
}
.a-btn:hover{
    text-decoration: none;
    background:rgba(170, 77, 27, 0.6);
    -webkit-box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  1px 4px 5px 8px rgba(188, 188, 188, 0.6), 0px 0px 0px 9px #fff;
    -moz-box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  1px 4px 5px 8px rgba(188, 188, 188, 0.6), 0px 0px 0px 9px #fff;
    box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  1px 4px 5px 8px rgba(188, 188, 188, 0.6), 0px 0px 0px 9px #fff;
}
.a-btn:hover span:nth-child(3){
    margin-top: 10px;
    opacity:1;
}
.a-btn:hover span:nth-child(2){
    opacity: 0;
    -webkit-transform: scale(0);
    -moz-transform: scale(0);
    transform: scale(0);
}
.a-btn:hover span:nth-child(1){
    -webkit-animation:rotate 1s linear;
    -moz-animation:rotate 1s linear;
    animation:rotate 1s linear;
}
.a-btn:active{
    -webkit-box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  0px -1px 0px 8px rgba(188, 188, 188, 0.3), 0px 0px 0px 10px #fff;
    -moz-box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  0px -1px 0px 8px rgba(188, 188, 188, 0.3), 0px 0px 0px 10px #fff;
    box-shadow:0px 0px 5px 0px rgba(246, 212, 163, 0.5) inset, 0px -1px 5px 4px rgba(170, 77, 27, 0.2) inset, 0px 0px 0px 7px #fff,  0px -1px 0px 8px rgba(188, 188, 188, 0.3), 0px 0px 0px 10px #fff;
}
.a-btn:active span:nth-child(2){
    color:rgba(170, 77, 27, 0.8);
    text-shadow:0px 1px 1px rgba(255, 255, 255, 0.6);
}
@keyframes rotate{
    0% { transform: scale(1) rotate(0);}
    50% { transform: scale(0.5) rotate(180deg);}
    100% { transform: scale(1) rotate(360deg);}
}
@-webkit-keyframes rotate{
    0% { -webkit-transform: scale(1) rotate(0);}
    50% { -webkit-transform: scale(0.5) rotate(180deg);}
    100% { -webkit-transform: scale(1) rotate(360deg);}
}
@-moz-keyframes rotate{
    0% { -moz-transform: scale(1) rotate(0);}
    50% { -moz-transform: scale(0.5) rotate(180deg);}
    100% { -moz-transform: scale(1) rotate(360deg);}
}
