Redirection not working with .htaccess file

Question

I am using htaccess to hide GET variables from the URL. I am having a problem. Myy project structure is something like this:

--project

  index.php

  /views

    login.php

    example.php

    /user

      dashboard.php

So, when I use something like "localhost/project/login", I am correctly redirected to the login.php page. But when I do something like "localhost/project/user/dashboard", I get an Apache generated 404 Not Found response.

This is what I am using in PHP to include the pages with the GET variables:

PHP code:

<?php
if(isset($_GET['page'])) {
$page = $_GET['page'].'.php';
if(is_file('views/'.$page)) {
    include 'views/'.$page;
} else {
    echo 'Page does not exist';
}
?>

htaccess file:

RewriteEngine on
RewriteRule ^([A-Za-z0-9-]+)/?$ index.php?page=$1 [NC]

Can anybody give me some guidance? I don't have experience with .htaccess files