Pure CSS implementation of radio and checkbox effect example

<div class="reset-radio">
    <input checked type="radio" id="age1" name="age">
    <span class="real-target"></span>
</div>

.reset-radio {
    display: inline-block;
    position: relative;
    width: 16px;
    height: 16px;
}

.reset-radio .real-target {
    z-index: 1;
    width: 100%;
    height: 100%;
    position: absolute;
    display: inline-block;
    background: #ffffff;
    border: 1px solid #dadde0;
    border-radius: 100%;
    top: 0;
    left: 0;
    bottom: 0;
}

.reset-radio input[type=radio] {
    cursor: pointer;
    z-index: 2;
    width: 16px;
    height: 16px;
    opacity: 0;
    position: absolute;
    left: 0;
    top: 0;
    margin: 0;
    right: 0;
    bottom: 0;
}

.reset-radio input:checked+span {
    border-color: #48b4ec;
}

.reset-radio input:checked+span::before {
    content: '';
    position: absolute;
    background: #48b4ec;
    width: 6px;
    height: 6px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 100%;
}