JSFiddle - React, Tailwind, and code Playground

HTML

<div id="green">
<fieldset id="costs">
				<legend>Costs: </legend>
				<input id="free" name="costs" type="radio" value="free">
				<label class="costs" for="free">Free</label>

				<input id="chargeable" name="costs" type="radio" value="chargeable">
				<label class="costs" for="chargeable">Chargeable</label>

				<input id="mixed" name="costs" type="radio" value="mixed" checked>
				<label  class="costs" for="mixed">Mixed</label>
				</fieldset>
</div>

CSS

#green{
	background-color: green;
	height: 200px;
}
#costs{
	height:calc(100% - 20px);
}


.costs
{
font-family: Arial, sans-serif;
background-color:#FFBC02;
color:white;
padding: 5px 12px;
margin-left:5px;
font-size: 1.05em;
}

input[type=radio]
{
display:none;
}



input[type=radio]:checked + label 
{
background-color:lightgreen;
}