<form class="form">
	<h2>Is this awesome?</h2>
	<div class="switch-field">
		<input type="radio" id="radio-one" name="switch-one" value="yes" checked/>
		<label for="radio-one">Yes</label>
		<input type="radio" id="radio-two" name="switch-one" value="no" />
		<label for="radio-two">No</label>
	</div>

	<h2>Three fields? Sure.</h2>
	<div class="switch-field">
		<input type="radio" id="radio-three" name="switch-two" value="yes" checked/>
		<label for="radio-three">One</label>
		<input type="radio" id="radio-four" name="switch-two" value="maybe" />
		<label for="radio-four">Two</label>
		<input type="radio" id="radio-five" name="switch-two" value="no" />
		<label for="radio-five">Three</label>
	</div>

	<h2>I'm ugly.</h2>
	<div class="regular-field">
		<input type="radio" id="radio-six" name="notaswitch-one" value="yes" checked/>
		<label for="radio-six">Boring</label>
		<input type="radio" id="radio-seven" name="notaswitch-one" value="maybe" />
		<label for="radio-seven">Generic</label>
		<input type="radio" id="radio-eight" name="notaswitch-one" value="no" />
		<label for="radio-eight">Confusing</label>
	</div>

	<h2>So am I.</h2>
	<div class="regular-field">
		<input type="radio" id="radio-nine" name="notaswitch-two" value="yes" checked/>
		<label for="radio-nine">This works</label><br />
		<input type="radio" id="radio-ten" name="notaswitch-two" value="maybe" />
		<label for="radio-ten">I'm used to it</label><br />
		<input type="radio" id="radio-eleven" name="notaswitch-two" value="no" />
		<label for="radio-eleven">I have no flavor</label><br />
	</div>
</form>
.switch-field {
	display: flex;
	margin-bottom: 36px;
	overflow: hidden;
}

.switch-field input {
	position: absolute !important;
	clip: rect(0, 0, 0, 0);
	height: 1px;
	width: 1px;
	border: 0;
	overflow: hidden;
}

.switch-field label {
	background-color: #e4e4e4;
	color: rgba(0, 0, 0, 0.6);
	font-size: 14px;
	line-height: 1;
	text-align: center;
	padding: 8px 16px;
	margin-right: -1px;
	border: 1px solid rgba(0, 0, 0, 0.2);
	box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px rgba(255, 255, 255, 0.1);
	transition: all 0.1s ease-in-out;
}

.switch-field label:hover {
	cursor: pointer;
}

.switch-field input:checked + label {
	background-color: #a5dc86;
	box-shadow: none;
}

.switch-field label:first-of-type {
	border-radius: 4px 0 0 4px;
}

.switch-field label:last-of-type {
	border-radius: 0 4px 4px 0;
}

/* This is just for CodePen. */

.form {
	max-width: 600px;
	font-family: "Lucida Grande", Tahoma, Verdana, sans-serif;
	font-weight: normal;
	line-height: 1.625;
	margin: 8px auto;
	padding: 16px;
}

h2 {
	font-size: 18px;
	margin-bottom: 8px;
}

External CSS

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External JavaScript

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