radio.css

/* ========== Radio Buttons from W3School ========== */

/* The container */
.container {
    display: block;
    position: relative;
    padding-left: 30px;
    margin-bottom: 6px;
    cursor: pointer;
}

/* Hide the browser's default radio button */
.container input[type="radio"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

/* Create a custom radio button */
.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 17px;
    width: 17px;
    background-color: transparent;
        border: 1px solid white;
    border-radius: 50%;
}

/* On mouse-over, add a grey background color */
.container:hover input~.checkmark {
    background-color: rgba(255,255,255,0.4);
}

/* Create the indicator (the dot/circle - hidden when not checked) */
.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

/* Show the indicator (dot/circle) when checked */
.container input:checked~.checkmark:after {
    display: block;
}

/* Style the indicator (dot/circle) */
.container .checkmark:after {
    top: 5px;
    left: 5px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: white;
}