There seems to be some odd spacing issues in the mobile version. Here are some images for reference:
Here's how it appears on desktop:
And now, the mobile version:
Mobile #01 - showing extra spacing on the right side
Mobile #02 - possibly caused by the "h3" class called display-4?
The provided HTML code is as follows:
<!-- The beginning of html -->
<!DOCTYPE HTML>
<html lang="PL-pl">
<head>
<title>The page is being rebuilt...</title>
<meta charset="utf-8">
<!-- versioning can often help (href="css/style.css?ver=2.0") -->
<!-- BOOTSTRAP 4 -->
<meta name="viewport" content="width=device-width, initial-scale=1.0, shrink-to-fit=no">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<link rel="stylesheet" href="https://reportsquestionsznaczki65.000webhostapp.com/css/restyled.css">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
</head>
<body>
<main>
<div class="jumbotron jumbotron-fluid text-white text-center bg-info nomarginbottom">
<div class="container">
<h3 class="display-2">This site is being finally rebuilt!</h3>
<p class="lead">It will have more features soon.</p>
</div>
</div>
<!-- Rest of the HTML code goes here -->
</main>
<noscript>
<meta http-equiv="refresh" content="0; URL=https://reportsquestionsznaczki65.000webhostapp.com/noscript.html"/>
</noscript>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>
</body>
</html>
The CSS (restyled.css) used for styling is as follows:
/* Relevant CSS styles go here */
You can visit the website here. To view the source code and stylesheet, you can use the following links:
View Source Code
CSS Stylesheet
Any assistance would be greatly appreciated. Thank you.