<label><input type="radio" name="e"> First</label>
<label><input type="radio" name="e"> Second</label>
<label><input type="radio" name="e" disabled> Disabled</label>

input[type=radio] {
  --s: 1em;     /* control the size */
  --c: #009688; /* the active color */
  
  height: var(--s);
  aspect-ratio: 1;
  border: calc(var(--s)/8) solid var(--_c,#939393);
  padding: calc(var(--s)/8);
  box-shadow: 
    calc(var(--_p,calc(-2*var(--s))) + var(--s)/8) 
    0 0 calc(var(--s)/-4) var(--_c,#0000);
  background: 
    radial-gradient(farthest-side,var(--c) 94%,#0000) 
    var(--_p,calc(-2*var(--s))) 50% 
    no-repeat content-box padding-box;
  border-radius: 50%;
  outline-offset: calc(var(--s)/10);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  cursor: pointer;
  font-size: inherit;
  transition: .3s;
}
input[type=radio]:checked {
  --_c: var(--c);
  --_p: 0px;
}

input[type=radio]:disabled {
  background: 
     linear-gradient(#939393 0 0) 
     50%/100% 20% no-repeat content-box;
  opacity: .5;
  cursor: not-allowed;
}
@media print {
  input[type=radio] {
    -webkit-appearance: auto;
    -moz-appearance: auto;
    appearance: auto;
    background: none;
  }
}

label {
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:5px 0;
  cursor: pointer;
}
body {
  margin:0;
  min-height:100vh;
  display:grid;
  place-content:center;
  font-family: system-ui, sans-serif;
  font-size: 40px;
}