JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main">
   <header>
     <h1 id="header-container">
     </h1>
   </header>
</div>

CSS

#main {
  background: #eae8dc;
  margin: 0 auto;
  width: 790px;
  height: 900px;
  position: relative;
  display: block;
   text-align: center;
}
header {
  display: inline-block;
  height: 118px;
  width: 648px;
  background: #9ed5de;
  margin: 11px auto;
}