JSFiddle - React, Tailwind, and code Playground

HTML

<div id="incomedialog"> 
    <div>dsfdfgdfgdfgfd dsfdfgdfgdfgfd dsfdfgdfgdfgfd </div> 
</div>

CSS

#incomedialog{
    width:100%;
    position:absolute;
    height:100%;
    min-height:300px;
    overflow:hidden;
    background-color:rgba(127,127,127,0.4);
}
#incomedialog div{
    width:600px;
    position:absolute;
    left:0;
    right:0;
    height:470px;
    overflow:hidden;
    min-height:300px;
    background-color:#EEEEEE;
    border:2px solid #CDCDCD;
    border-radius:3px;
    color:red;
    top:70px;
}