JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div class="header">
        <div class="logo"></div>
    </div>
</body>

CSS

body {
    background-color: #CCC;
    margin: 0;
    padding: 0;
}

.header {
    height:80px;
    background-color: #8BB;
    margin: 0;
    /*padding: 15px 0 0;*/
    /*border: 1px solid yellow;*/
}

.logo {
    height: 30px;
    width: 500px;
    margin: 15px auto;
    background-color: #B5B;
    /*border: 1px solid red;*/
}