<form method="post" class="form_modal">
<input type="text" required name="you_name" class="name_call" placeholder="Ваше Имя">
<input type="tel" required name="you_phone" class="phone_call" placeholder="Номер телефона">
<button type="submit" class="btn_form">Отправить</button>
<div class="message_call"></div>
</form>