<form class="form" action="login">
<h2>Авторизация в системе</h2>
<div class="form__inputs">
<input type="text" name="login" placeholder="Логин">
<input type="password" name="password" placeholder="Пароль">
</div>
<button class="form__login" type="submit">Вход</button>
<button class="form__signup" type="button">Регистрация</button>
</form>
<button class="form__signup" type="button" onclick="return false">Регистрация</button>