JSFiddle - React, Tailwind, and code Playground

HTML

<header>
    <h1> My Website </h1>
</header>

CSS

header
{
    padding: 0px;
    background-color: BCCCCC;
    color: black;
    font-weight: bold;
    text-align: center;
    height:100px;
    background:red;
    display:table;
    width:100%;
    
}
h1{
    display:table-cell;
    text-align:center;
    vertical-align:bottom;
}