Libr/public/circle-button/style.css

* { 
  -webkit-box-sizing: border-box; 
  -moz-box-sizing:    border-box; 
  box-sizing:         border-box; 
  margin: 0;
  padding: 0;
}



h1 {
  font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
  font-size: 36px;
  font-size: 2rem;    
  line-height: 1.5; 
  font-weight: bold;
}

.page-wrap {
  width: 960px;
  margin: 80px auto;
}

.mynav {
  list-style: none;
  text-align: center;
}

.mynav li {
  position: relative;
  display: inline-block;
  margin-right: -4px; /* See: http://css-tricks.com/fighting-the-space-between-inline-block-elements/ */
}

.mynav li:before {
  content: "";
  display: block;
  border-top: 1px solid #ddd;
  border-bottom: 1px solid #fff;
  width: 100%;
  height: 1px;
  position: absolute;
  top: 50%;
  z-index: -1;
}

.mynav a {
  display: block;
  background-color: #f7f7f7;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#f7f7f7), to(#e7e7e7));
  background-image: -webkit-linear-gradient(top, #f7f7f7, #e7e7e7); 
  background-image: -moz-linear-gradient(top, #f7f7f7, #e7e7e7); 
  background-image: -ms-linear-gradient(top, #f7f7f7, #e7e7e7); 
  background-image: -o-linear-gradient(top, #f7f7f7, #e7e7e7); 
  color: #a7a7a7;
  margin: 36px;
  width: 144px;
  height: 144px;
  position: relative;
  text-align: center;
  line-height: 144px;
  border-radius: 50%;
  box-shadow: 0px 3px 8px #aaa, inset 0px 2px 3px #fff;
}

.mynav a:before {
  content: "";
  display: block;
  background: #fff;
  border-top: 2px solid #ddd;
  position: absolute;
  top: -18px;
  left: -18px;
  bottom: -18px;
  right: -18px;
  z-index: -1;
  border-radius: 50%;
  box-shadow: inset 0px 8px 48px #ddd;
}

.mynav a:hover {
  text-decoration: none;
  color: #555;
  background: #f5f5f5;
}