content/browser/resources/attribution_reporting/attribution_internals_table.html

<style>
  table {
    border: 0;
    border-collapse: collapse;
    /* Per
     * https://limebrains.com/blog/2021-03-02T13:00-heigh-100-inside-table-td
     * this forces the header buttons to expand vertically, making them easier
     * to click on.
     */
    height: 1px;
    width: 100%;
  }

  thead, tfoot {
    background: #bacbe6;
    position: sticky;
  }

  thead {
    top: 0;
  }

  tbody tr, tfoot tr {
    border-top-color: rgba(0,0,0,.12);
    border-top-style: solid;
    border-top-width: 1px;
  }

  tfoot {
    bottom: 0;
    font-weight: bold;
  }

  td, th {
    padding-inline: 16px;
  }

  th[aria-sort] {
    padding: 0;
  }

  th[aria-sort] button {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font: inherit;
    height: 100%;
    padding-inline: 16px;
    height: 100%;
    width: 100%;
  }

  th[aria-sort] button:hover {
    background: rgba(0,0,0,.12);
  }

  th[aria-sort='none'] button::after {
    content: '⬍';
  }

  th[aria-sort='ascending'] button::after {
    content: '⬆';
  }

  th[aria-sort='descending'] button::after {
    content: '⬇';
  }

  ul, li {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .send-error::after {
    content: ' ❌';
  }

  .number {
    font-variant-numeric: tabular-nums;
    text-align: right;
  }
</style>
<table>
  <thead>
    <tr></tr>
  </thead>
  <tbody></tbody>
  <tfoot>
    <tr><td></td></tr>
  </tfoot>
</table>