JSFiddle - React, Tailwind, and code Playground
by l2banners
HTML
<div class="box">
<div class="box__inner"></div>
</div>
CSS
.box {
margin: 40px auto;
width: 200px;
filter: drop-shadow(0 0 1px rgb(255, 0, 0)) drop-shadow(0 0 6px rgba(0, 0, 0, 0.3));
}
.box__inner {
height: 100px;
background-color: #fff;
border-radius: 10px;
clip-path: polygon(0 0, 100% 0, 100% 40%, calc(100% - 10px) 50%, 100% 60%, 100% 100%, 0 100%, 0 60%, 10px 50%, 0 40%);
}