JSFiddle - React, Tailwind, and code Playground

HTML

<div id="aerakman-inset"></div>
<div id="aerakman-inset-b"></div>

CSS

body{
    background-color:#d9d9d9;
}
#aerakman-inset{
    width:250px; height:100px;
    background-color:#f3f3f3;
    border:2px solid #ebebeb;
    float:left;
    margin:10px 0 0 10px;
    -moz-box-shadow: inset 0px 0px 10px #333;     /* Mozilla */
    -webkit-box-shadow: inset 0px 0px 10px #333;  /* Chrome ve Safari */
    box-shadow: inset 0px 0px 10px #333;          /* Standart CSS Kodu */
}
#aerakman-inset-b{
    width:250px; height:100px;
    background-color:#f3f3f3;
    border:2px solid #ebebeb;
    float:right;
    margin:10px 10px 0 0px;
}
#aerakman-inset-b:hover{
    -moz-box-shadow: inset 0px 0px 10px #333;     /* Mozilla */
    -webkit-box-shadow: inset 0px 0px 10px #333;  /* Chrome ve Safari */
    box-shadow: inset 0px 0px 10px #333;          /* Standart CSS Kodu */
}