Index.html

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Startup</title>
    <!--CSS sheet for Bootstrap-->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
    <link href="style.css" rel="stylesheet" />
</head>
<body>
    <header class="startup text-center d-flex">
        <div class="container my-auto">
            <div class="row">
                <div class="col-lg-12 my-auto">
                    <h1 class="text-uppercase faded">
                        <strong>the biggest startup event of the year</strong>
                    </h1>
                </div>
                <hr />
                <div class="col-lg-12 my-auto">
                    <button class="button1 btn btn-primary btn-xl">Find Out More</button>
                </div>
            </div>
        </div>
    </header>


    <!--Javascripts for Bootstrap-->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>
</html>