Rounded Button with Gradient Border

Button with gradient border

example.png

index.html

<button>Get Started</button>

JSFiddle URL

https://jsfiddle.net/yb9dto0k/1/

style.css

body {
  background-color: black;
}

button {
  border: none;
  display: inline-block;
  border-radius: 99px;
  color: white;
  position: relative;
  z-index: 1;
  font-size: 14px;
  padding: 17px 35px;
  font-weight: 100;
  text-transform: uppercase;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  letter-spacing: 2px;
}

button:before, 
button:after {
  content: ' ';
  position: absolute;
  border-radius: 99px;
}

button:before {
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  z-index: -2;
  background: #503b9a;
  background: -moz-linear-gradient(left, #503b9a 0%, #269cc1 100%);
  background: -webkit-gradient(linear, left top, right top, color-stop(0%,#503b9a), color-stop(100%,#269cc1));
  background: -webkit-linear-gradient(left, #503b9a 0%,#269cc1 100%);
  background: -o-linear-gradient(left, #503b9a 0%,#269cc1 100%);
  background: -ms-linear-gradient(left, #503b9a 0%,#269cc1 100%);
  background: linear-gradient(to right, #503b9a 0%,#269cc1 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#503b9a', endColorstr='#269cc1',GradientType=1 );
}

button:after {
  top: 2px; 
  bottom: 2px;
  left: 2px;
  right: 2px;
  background-color: black;
  z-index: -1;
  opacity: 1;
  transition: all 0.6s ease-in-out;
}

button:hover:after {
  opacity: 0;
}