Conectou<br>Time zone OK<br>
<link rel="stylesheet" href="style.css">

<div class="container">
<h2>Login - Sistema OS</h2>

<form action="autenticar.php" method="POST">
    <label>Usuário</label>
    <input type="text" name="usuario" required>

    <label>Senha</label>
    <input type="password" name="senha" required>

    <button type="submit">Entrar</button>
</form>
</div>