CodePen Embed - Focus-within example

<form action="action.php">
    <p><label>ИМЯ <input type="text"></label></p>
    <p><label>ФАМИЛИЯ <input type="text"></label></p>
    <p><label>ОТЧЕСТВО <input type="text"></label></p>
    <p><button type="submit">Отправить</button></p>
</form>

    form{
        padding: 1rem;
        border:  2px solid grey;
    }
    form:focus-within{
        box-shadow:  0px 0px 16px 0px rgba(255,158,255,1);
    }

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