JSFiddle - React, Tailwind, and code Playground

by Abhay Singh

HTML

<div>
<div style="
">
    <div class="xyz" style="
    width: 50%;
    border: 1px solid #f00;
    height: 100px;
    border-bottom: none;
    position: relative;
    top: 1px;
    background: #fff;
    border-radius: 10px 20px 0 0;
    float: left;
    ">
      23bytes
    </div>
    <div class="xyz xvv" style="
    width: calc(50% - 10px);
    border: 1px solid #f00;
    height: 100px;
    border-bottom: none;
    position: relative;
    top: 1px;
    background: #fff;
    border-radius: 10px 20px 0 0;
    float: right;
    border: none;
    ">
      23bytes
    </div>
    <div style="
    width: 100%;
    border: 1px solid #f00;
    height: 50px;
    padding-top:10px;
    float:left;
    ">
      <a href="javascript:;">Abhay</a>
      <a href="javascript:;">Abhay</a>
      <a href="javascript:;">Abhay</a>
    </div>
</div>
    </div>

CSS

.xyz:before {
    content: '';
    width: 100px;
    height: 100px;
    border: 1px solid #f00;
    position: absolute;
    right: -100px;
    border-radius: 0 0 0 32px;
    top: -1px;
    border-top: none;
    border-left: none;
    border-right: none;
    z-index: 1;
}
.xyz:after {
        content: '';
    position: absolute;
    width: 50px;
    height: 30px;
    background: #fff;
    right: -34px;
    bottom: -3px;
}
.xvv:before, .xvv:after {
  display:none;
}
a {
  display:inline-block;
  width:calc(100% / 3 - 3px);
  text-align:center;
}