button {
    font-family: Avenir, sans-serif;
    font-size: 16px;
    padding: 10px 30px;
    position: relative;
    color: white;
    border: 0;
}
.button {
    background: #94d9e4;
    background: -moz-linear-gradient(top,#28a6bb 0%,#75c7d3 100%);
    background: -webkit-gradient(linear,left top,left bottom,color-stop(0%,#28a6bb),color-stop(100%,#75c7d3));
    background: -webkit-linear-gradient(top,#28a6bb 0%,#75c7d3 100%);
    background: -o-linear-gradient(top,#28a6bb 0%,#75c7d3 100%);
    background: -ms-linear-gradient(top,#28a6bb 0%,#75c7d3 100%);
    background: linear-gradient(to bottom,#28a6bb 0%,#75c7d3 100%);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='@gradient-light',endColorstr='@gradient-dark',GradientType=0);
    border-top: 2px solid #1f8191;
    border-bottom: 2px solid #4eb7c7;
}
.button:before, .button:after {
    content: "";
    position: absolute;
    background-image: -webkit-gradient(linear,0 0,0 100%,from(#1f8191),to(#4eb7c7));
    background-image: -webkit-linear-gradient(#1f8191,#4eb7c7);
    background-image: -moz-linear-gradient(#1f8191,#4eb7c7);
    background-image: -o-linear-gradient(#1f8191,#4eb7c7);
    background-image: linear-gradient(#1f8191,#4eb7c7);
    top: -2px;
    bottom: -2px;
    width: 2px;
}
.button:before {
    left: -2px;
}
.button:after {
    right: -2px;
}
.button2 {
    background: #894B9E;
    background: -moz-linear-gradient(top,#894B9E 0%,#C396D1 100%);
    background: -webkit-gradient(linear,left top,left bottom,color-stop(0%,#894B9E),color-stop(100%,#C396D1));
    background: -webkit-linear-gradient(top,#894B9E 0%,#C396D1 100%);
    background: -o-linear-gradient(top,#894B9E 0%,#C396D1 100%);
    background: -ms-linear-gradient(top,#894B9E 0%,#C396D1 100%);
    background: linear-gradient(to bottom,#894B9E 0%,#C396D1 100%);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='@gradient-light',endColorstr='@gradient-dark',GradientType=0);
}
.button2:after, .button5:after {
    content: "";
    position: absolute;
    display: block;
    width: 99%;
    height: 99%;
    border: 2px solid rgba(0,0,0,0.1);
    border-right: 0;
    border-bottom: 0;
    top: 0;
    left: 0px;
}
.button2:before, .button5:before {
    content: "";
    position: absolute;
    display: block;
    width: 99%;
    height: 99%;
    border: 2px solid rgba(0,0,0,0.1);
    border-left: 0;
    border-top: 0;
    bottom: 0;
    right: 0;
}
.button3 {
    background-image: radial-gradient(circle at 33.76% 4.72%,#AAFFA9,transparent 55%), radial-gradient(circle at 73.88% 95.17%,#11FFBD,transparent 100%), radial-gradient(circle at 50% 50%,#ffffff,#ffffff 100%);
    -moz-box-shadow: inset 4px 4px 0px #fff;
    -webkit-box-shadow: inset 4px 4px 0px #fff;
    box-shadow: inset 4px 4px 0px #fff;
    box-shadow: inset 0px 0px 0px 2px #fff;
    border: 4px solid transparent;
}
.button4 {
    background-image: radial-gradient(circle at 32.06% 7.83%,#4776E6,transparent 100%), radial-gradient(circle at 53.88% 93.99%,#8E54E9,transparent 91%), radial-gradient(circle at 50% 50%,#ffffff,#ffffff 100%);
}
.button5 {
    background-image: radial-gradient(circle at 49.45% 10.73%,#FF8008,transparent 100%), radial-gradient(circle at 87.88% 94.1%,#FFC837,transparent 100%), radial-gradient(circle at 50% 50%,#ffffff,#ffffff 100%);
}