<style>
form {
border: 3px solid #FF0000;
color: #000000;
padding: 4px;
}
form:focus-within {
background: #f7b731;
color: #000000;
}
</style>
</head>
<body>
<div class="focus-within">
<form>
<p>Nombre: <input id="given_name" type="text"> </p>
<p>Email: <input id="family_name" type="text"> </p>
</form>
</div>

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