@import url(http://fonts.googleapis.com/css?family=Oswald:400,300,700);
.selector {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 140px;
    height: 140px;
    margin-top: -70px;
    margin-left: -70px;
}

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

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

.selector button:focus {
    outline: none;
}

.selector ul {
    position: absolute;
    list-style: none;
    padding: 0;
    margin: 0;
    top: -20px;
    right: -20px;
    bottom: -20px;
    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 {
    position: absolute;
    left: 50%;
    bottom: 100%;
    width: 0;
    height: 0;
    line-height: 1px;
    margin-left: 0;
    background: #fff;
    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: 80px;
    height: 80px;
    line-height: 80px;
    margin-left: -40px;
    box-shadow: 0 3px 3px rgba(0, 0, 0, 0.1);
    font-size: 14px;
}