.a-radio {
  --color: #2980b9;
  --bg-color: inherit;
  --outline-color: #92c5e7;
  --non-checked-color: #808080;
  --disabled-color: #d3d3d3;
  --border-color: var(--color);
  --hover-border-color: #58a6da;
  --circle-size: 1.25em;
  --text-size: inherit;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin: 0.3em;
  cursor: pointer;
}

.a-radio > span {
  font-size: var(--text-size);
}

.a-radio input[type='radio'] {
  -webkit-appearance: none;
  -moz-appearance: none;
       appearance: none;
  background-color: var(--bg-color);
  margin: 0;
  font: inherit;
  color: var(--color);
  width: var(--circle-size);
  height: var(--circle-size);
  border: 0.12em solid var(--non-checked-color);
  border-radius: 50%;
  display: grid;
  align-content: center;
  justify-content: center;
  place-content: center;
  transition: all 120ms ease-in-out;
  cursor: pointer;
}

.a-radio:hover input[type='radio']:not(:disabled) {
  border-color: var(--hover-border-color);
}
.a-radio:has(input[type='radio']:disabled) {
  cursor: default;
}
.a-radio input[type='radio']:disabled {
  opacity: 0.5;
  cursor: default;
}

.a-radio input[type='radio']::before {
  content: '';
  width: 0.75em;
  height: 0.75em;
  border-radius: 50%;
  transform: scale(0);
  transition: 120ms transform ease-in-out;
  box-shadow: inset 1em 1em var(--color);
}

.a-radio input[type='radio']:checked::before {
  transform: scale(1);
}
.a-radio input[type='radio']:checked {
  border-color: var(--color);
}
.a-radio input[type='radio']:focus {
  outline: 3px solid var(--outline-color);
}