radio.css

/* Styles for hiding the native radio button */
input[type='radio'].check-custom {
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  opacity: 0;
  filter: alpha(opacity=0);
  position: absolute;
  visibility: hidden;
}

/* Styles for the basic appearance of the custom radio button */
input[type='radio'].check-custom ~ .check-toggle {
  width: 1rem;
  height: 1rem;
  position: relative;
  display: inline-block;
  vertical-align: middle;
  border: 1px solid #969696;
  border-radius: 50%;
  cursor: pointer;
}

/* Styles for the hover state appearance of the custom radio button */
input[type='radio'].check-custom:hover ~ .check-toggle {
  border: 2px solid #4a4a4a;
}

/* Styles for the checked state appearance of the custom radio button */
input[type='radio'].check-custom:checked ~ .check-toggle {
  border: 2px solid #1785ff;
}

/* Styles for the checked state appearance of the custom radio button */
input[type='radio'].check-custom:checked ~ .check-toggle::after {
  content: '';
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 40%;
  height: 40%;
  margin: auto;
  position: absolute;
  border-radius: 30%;
  background: #1785ff;
}