Template:Multiple choice option/styles.css

input[type=radio].multiple-choice-radio-button {
  display: none;
}

.multiple-choice-label {
    display: inline-block;
    padding: 6px;
    margin: 0px 5px;
    border-radius: 3px;
    border: 1px solid #cccccc;
}

.multiple-choice-label:hover {
    background-color: #e9e9e9;
    border: 1px solid #cccccc;
}

input[type=radio].multiple-choice-radio-button:checked + .multiple-choice-label {
    background: #36c;
    border-color: #36c;
    color: white;
}

input[type=radio].multiple-choice-radio-button:checked + .multiple-choice-label:hover {
    background: #447ff5;
    border-color: #447ff5;
    color: white;
}

input[type=radio].multiple-choice-radio-button:checked + .multiple-choice-label:focus {
    box-shadow: inset 0 0 0 1px #36c, inset 0 0 0 2px #fff;
}