JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main">
    <div id="fixed"></div>
    <div id="content"></div>
    
</div >

CSS

#main{
    width:95%;
}

#fixed{
    position:fixed;
    z-index:2;
    width:90%;
height:25px;
background:yellow;}
#content{
    width:90%;
    height:300px;
background:red}