JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<body>
<header>
    <div class="container">

            <h1>Welcome to my blog</h1>

    </div>

    <ul>
        <div class="navigation-bar-items">

                <li>Home</li>
                <li>About me</li>
                <li>Social</li>
                <li>Contact Me</li>
                <li></li>

        </div>
    </ul>
</header>
<div class="test">Hello</div>
</body>

CSS

body    {
    text-align: center;
    background-image: url(https://classconnection.s3.amazonaws.com/114178/flashcards/759682/jpg/cumulus.jpg);
    background-size: 100%;
    font-family: 'Open Sans', sans-serif;
    }

    h1  {
    text-align: center;
    font-size: 50px;
    color: #CE4F04;
    background-color: white;
    margin-left: -10px;
    margin-top: 15px;
    margin-right: -10px;
    padding-top: 10px;
    padding-bottom: 10px;
    font-family: 'Pacifico', cursive;
    }

    ul  {
    left: 10px;
    right: 10px;
    position: fixed;
    margin-top: 110px;
    background-color: aliceblue;
    text-align: center;
    }

    li {
    display: inline;
    padding-right: 10px;
    padding-left: 10px;
        }
    .navigation-bar-items {
    font-size: 30px;
    color: grey;
    }
    .container { 
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    text-align: center;
   }
    .mainLogo {
    text-align: center;
    font-size: 50px;
    color: #CE4F04;
    background-color: white;
    margin-left: -10px;
    margin-top: 15px;
    margin-right: -10px;
    padding-top: 10px;
    padding-bottom: 10px;
    font-family: 'Pacifico', cursive;
    }
    .main {
    max-width: 1000px;
    background-color: aquamarine;
    margin-top: 1000px;
    }
    .test {
    margin-top: 200px; 
    }