JSFiddle - React, Tailwind, and code Playground

HTML

<table>

  <tr>
    <th>text</th>
    <th>text</th>
    <th>text</th>
  </tr>
  <tr>
    <td>text text</td>
    <td>text text</td>
    <td>text text</td>
  </tr>
  <tr>
    <td>text text</td>
    <td>text text</td>
    <td>text text</td>
  </tr>

</table>

CSS

@import url('https://fonts.googleapis.com/css2?family=Neucha&display=swap');


* {
  box-sizing: inherit;
}

html {
  box-sizing: border-box;
}

body {
  padding: 50px;
  margin: 0;
  font-family: 'Neucha', cursive;
}

table {
  border-collapse: collapse;
}

th,
td {
  padding: 20px 40px;
  border: 1px dotted gray;
}

th {
  position: relative;
  color: #fff;
  font-weight: 400;
  font-size: 20px;
}

th::after {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 10px;
  right: 10px;
  border-radius: 8px;
  background: linear-gradient(21deg, #dd03e4, #5611ec);
  z-index: -1;
  
}