JSFiddle - React, Tailwind, and code Playground

HTML

<div class="table-wrapper">
<table>
  <tr>
    <td>One</td>
    <td>Two</td>
    <td>Three</td>
  </tr>
  <tr>
    <td>One</td>
    <td>Two</td>
    <td>Three</td>
  </tr>
  <tr>
    <td>One</td>
    <td>Two</td>
    <td>Three</td>
  </tr>
</table>
</div>

CSS

.table-wrapper {
  border: 1px solid #000;
  border-radius: 20px;
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 20px;
  table-layout: fixed;
  text-align: center;
  font: 13px Verdana;
}

table tr {
  border-radius: 20px;
}

table td {
  border: 1px solid #000000;
  padding: 20px;
  background: red;
  color: #ffffff;
}

table tr:first-child td:first-child {
  border-radius: 20px 0 0 0;
}

table tr:first-child td:last-child {
  border-radius: 0 20px 0 0;
}

table tr:last-child td:first-child {
  border-radius: 0 0 0 20px;
}

table tr:last-child td:last-child {
  border-radius: 0 0 20px 0;
}