<fieldset>
  <label>
    <input type="radio" name="contact" value="email" checked />
    <span>이메일</span>
  </label>

  <label>
    <input type="radio" name="contact" value="phone" />
    <span>전화</span>
  </label>

  <label>
    <input type="radio" name="contact" value="fax" disabled />
    <span>팩스</span>
  </label>

  <label>
    <input type="radio" name="contact" value="mail" />
    <span>우편</span>
  </label>
</fieldset>
label {
  font-size: 18px;
  line-height: 2rem;
  padding: 0.2em 0.4em;
}

span {
  vertical-align: middle;
}

[type="radio"] {
  vertical-align: middle;
  appearance: none;
  border: max(2px, 0.1em) solid gray;
  border-radius: 50%;
  width: 1.25em;
  height: 1.25em;
  transition: border 0.5s ease-in-out;
}

[type="radio"]:checked {
  border: 0.4em solid tomato;
}

[type="radio"]:focus-visible {
  outline-offset: max(2px, 0.1em);
  outline: max(2px, 0.1em) dotted tomato;
}

[type="radio"]:hover {
  box-shadow: 0 0 0 max(4px, 0.2em) lightgray;
  cursor: pointer;
}

[type="radio"]:disabled {
  background-color: lightgray;
  box-shadow: none;
  opacity: 0.7;
  cursor: not-allowed;
}

[type="radio"]:disabled + span {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Global CSS */
fieldset {
  display: flex;
  justify-content: center;
  border: none;
  margin: 0;
  padding: 40px 20px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

External CSS

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External JavaScript

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