@import url(https://fonts.googleapis.com/css?family=Oswald:400,300,700);
html, body {
  height: 100%;
}

body {
  margin: 0;
  background: url(../bg.jpg) top center;
  background-size:cover;
  background-repeat:no-repeat;
  overflow: hidden;
}

.selector {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 200px;
  height: 200px;
  margin-top: -70px;
  margin-left: -70px;
}
.der {
 position: relative;
  width: 100%;
  height: 100%;
  padding: 10px;
  background: #428bca;
  border-radius: 50%;
  border: 0;
  color: white;
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 3px 3px rgba(0, 0, 0, 0.1);
  transition: all .1s;
}

.selector, .selector button {
  font-family: 'Oswald', sans-serif;
  font-weight: 300;
}

.selector button {
  position: relative;
  width: 100%;
  height: 100%;
  padding: 10px;
  
  border-radius: 50%;
  border: 0;
  color: white;

  cursor: pointer;

  transition: all .1s;
}

.selector button:hover {
  background: #3071a9;
}

.selector button:focus {
  outline: none;
}

.selector ul {
  position: absolute;
  list-style: none;
  padding: 0;
  margin: 0;
  top: -20px;
     right: -36px;
    bottom: -58px;
  left: -20px;
}

.selector li {
  position: absolute;
  width: 0;
  height: 100%;
  margin: 0 50%;
  -webkit-transform: rotate(-360deg);
  transition: all 0.8s ease-in-out;
}

.selector li input {
  display: none;
}

.selector li input + label a { text-decoration:none;color: #fff;}
.selector li input + label a:hover { color:#380e7c;}
.selector li input + label {
  position: absolute;
  left: 50%;
  bottom: 100%;
  width: 0;
  height: 0;
  line-height: 1px;
  margin-left: 0;
  background: #380e7c;
  border-radius: 50%;
  text-align: center;
  font-size: 1px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: none;
  transition: all 0.8s ease-in-out, color 0.1s, background 0.1s;
}

.selector li input + label:hover {
  background: #f0f0f0;
}

.selector li input:checked + label {
  background: #5cb85c;
  color: white;
}

.selector li input:checked + label:hover {
  background: #449d44;
}

.selector.open li input + label {
  width: 132px;
  height: 132px;
  line-height: 126px;
  margin-left: -40px;
  box-shadow: 0 3px 3px rgba(0, 0, 0, 0.1);
  font-size: 18px;
}