input[type="radio"] {
         
    width: 20px;
    height: 20px;
    border: 2px solid #555;
    border-radius: 50%;
    display: inline-block;
    position: relative;
    cursor: pointer;
    margin-right: 10px;
    vertical-align: middle;
}

input[type="radio"]::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #007bff;
    position: absolute;
    top: 4px;
    left: 4px;
    transform: scale(0);
    transition: transform 0.2s ease-in-out;
}

input[type="radio"]:checked::before {
    transform: scale(1);
}