Icon buttons by Hugo Giraudel on October 25, 2012 via http://codepen.io/HugoGiraudel/details/kmFsE // via http://sw4tch.com/swatches/24

icon_buttons.scss

.swatch {
  display: block;
  .foreground {
    display: block;
    border: 0 none;
    cursor: pointer;
    font-size: 50px;
    line-height: 100px;
    text-align: center;
    -webkit-transition: all 0.3s ease-out;
    -moz-transition: all 0.3s ease-out;
    -o-transition: all 0.3s ease-out;
    -ms-transition: all 0.3s ease-out;
    transition: all 0.3s ease-out;
    -webkit-border-radius: 50%;
    border-radius: 50%;
    text-shadow: 0 -2px 1px rgba(0, 0, 0, 0.25);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0, #fefefe), color-stop(1, #ebebeb));
    background: -webkit-linear-gradient(top, #fefefe 0%, #ebebeb 100%);
    background: -moz-linear-gradient(top, #fefefe 0%, #ebebeb 100%);
    background: -o-linear-gradient(top, #fefefe 0%, #ebebeb 100%);
    background: -ms-linear-gradient(top, #fefefe 0%, #ebebeb 100%);
    background: linear-gradient(top, #fefefe 0%, #ebebeb 100%);
    -webkit-box-shadow: 0 15px 15px rgba(0, 0, 0, 0.08), 0 5px 5px rgba(0, 0, 0, 0.075), 0 0 5px rgba(0, 0, 0, 0.2), inset 0 2px 2px white, inset 0 -2px 2px rgba(0, 0, 0, 0.1);
    box-shadow: 0 15px 15px rgba(0, 0, 0, 0.08), 0 5px 5px rgba(0, 0, 0, 0.075), 0 0 5px rgba(0, 0, 0, 0.2), inset 0 2px 2px white, inset 0 -2px 2px rgba(0, 0, 0, 0.1);
  }
}