JSFiddle - React, Tailwind, and code Playground

by magikMaker

HTML

<div class="box"></div>

CSS

.box {
    margin: 40px;
    width: 100px;
    height: 100px;
    background-color: red;
    position: absolute;
    border: 2px solid white;
    box-shadow: -1px 1px 4px 2px rgba(0, 0, 0, 0.3);
-moz-box-shadow: -1px 1px 4px 2px rgba(0, 0, 0, .3);
-webkit-box-shadow: -1px 1px 4px 2px rgba(0, 0, 0, 0.3);
}

.box:before,
.box:after {
    content: '';
    position: absolute; 
    width: 30px;
    height: 30px;
    left: -17px;
    top: 30px; 
    transform: rotate(45deg) ;
    -webkit-transform: rotate(45deg) ;
    -moz-transform: rotate(45deg) ;
    -o-transform: rotate(45deg) ;
    -ms-transform: rotate(45deg) ;
    border-left: 2px solid white;
    border-bottom: 2px solid white;
}

.box:before {
    z-index: -1;
    box-shadow: -1px 1px 4px 2px rgba(0, 0, 0, 0.3);
    -moz-box-shadow: -1px 1px 4px 2px rgba(0, 0, 0, .3);
    -webkit-box-shadow: -1px 1px 4px 2px rgba(0, 0, 0, 0.3);
}

.box:after {
    background-color: red;
}