The boxed radio buttons work exactly like standard radio buttons but have an inline visual style for better distinction.
<fieldset>
<div class="input input--radioBoxed">
<span>
<input type="radio" checked="checked" name="radio" id="radio1">
<label for="radio1">
<span>Radio - Checked</span>
</label>
</span>
<span>
<input type="radio" name="radio" id="radio2">
<label for="radio2">
<span>Radio - Unchecked</span>
</label>
</span>
</div>
<p class="message">Sorry looks like you choose poorly.</p>
</fieldset>
<fieldset disabled>
<div class="input input--radioBoxed">
<span>
<input type="radio" checked="checked" name="radio" id="radio1">
<label for="radio1">
<span>Radio - Checked</span>
</label>
</span>
<span>
<input type="radio" name="radio" id="radio2">
<label for="radio2">
<span>Radio - Unchecked</span>
</label>
</span>
</div>
<p class="message">Sorry looks like you choose poorly.</p>
</fieldset>
<fieldset class="invalid">
<div class="input input--radioBoxed">
<span>
<input type="radio" checked="checked" name="radio" id="radio1">
<label for="radio1">
<span>Radio - Checked</span>
</label>
</span>
<span>
<input type="radio" name="radio" id="radio2">
<label for="radio2">
<span>Radio - Unchecked</span>
</label>
</span>
</div>
<p class="message">Sorry looks like you choose poorly.</p>
</fieldset>
<fieldset class="invalid">
<div class="input input--radioBoxed">
<span>
<input type="radio" checked="checked" name="radio" id="radio1">
<label for="radio1">
<span>Radio - Checked</span>
</label>
</span>
<span>
<input type="radio" name="radio" id="radio2">
<label for="radio2">
<span>Radio - Unchecked</span>
</label>
</span>
</div>
<p class="message">Sorry looks like you choose poorly.</p>
</fieldset>