Radio button personalizado somente com CSS

input[type="radio"] {
    -webkit-appearance: none;
    appearance: none;
    margin: 0;
    font: inherit;
    color: red;
    width: 1.15em;
    height: 1.15em;
    border: 0.15em solid red;
    border-radius: 50%;
    transform: translateY(0.25em);
    display: grid;
    place-content: center;
}

input[type="radio"]::before {
  content: "";
  width: 0.65em;
  height: 0.65em;
  border-radius: 50%;
  transform: scale(0);
  transition: 120ms transform ease-in-out;
  box-shadow: inset 1em 1em red;
  display: block;
}

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