<style>
  * {
    font-family: 'MinervaSans';
  }

  .border-black {
    border: 1px solid black;
  }

  .thick-border-black {
    border: 10px solid black;
  }

  .table-border-black,
  table.table-border-black tr,
  table.table-border-black td {
    border: 1px solid black;
  }

  .table {
    display: table;
  }

  .table-row {
    display: table-row;
  }

  .table-cell {
    display: table-cell;
  }
</style>

<table class="table-border-black">
  <tr>
    <td>Firstname</td>
    <td>Lastname</td>
  </tr>
  <tr>
    <td>Peter</td>
    <td>Griffin</td>
  </tr>
  <tr>
    <td>Lois</td>
    <td>Griffin</td>
  </tr>
</table>

<!-- Border-collapse and hidden -->
<table class="table-border-black" style="border-collapse: collapse; border-style: hidden;">
  <tr>
    <td>Firstname</td>
    <td>Lastname</td>
  </tr>
  <tr>
    <td>Peter</td>
    <td>Griffin</td>
  </tr>
  <tr>
    <td>Lois</td>
    <td>Griffin</td>
  </tr>
</table>

<!-- Border-collapse and hidden with divs -->
<div class="table border-black" style="border-collapse: collapse; border-style: hidden;">
  <div class="table-row border-black">
    <div class="table-cell border-black">Firstname</div>
    <div class="table-cell border-black">Lastname</div>
  </div>
  <div class="table-row border-black">
    <div class="table-cell border-black">Peter</div>
    <div class="table-cell border-black">Griffin</div>
  </div>
  <div class="table-row border-black">
    <div class="table-cell border-black">Lois</div>
    <div class="table-cell border-black">Griffin</div>
  </div>
</div>

<!-- Border-collapse and hidden with divs -->
<div class="table thick-border-black" style="border-collapse: collapse; border-style: hidden;">
  <div class="table-row thick-border-black">
    <div class="table-cell thick-border-black">Firstname</div>
    <div class="table-cell thick-border-black">Lastname</div>
  </div>
  <div class="table-row thick-border-black">
    <div class="table-cell thick-border-black">Peter</div>
    <div class="table-cell thick-border-black">Griffin</div>
  </div>
  <div class="table-row thick-border-black">
    <div class="table-cell thick-border-black">Lois</div>
    <div class="table-cell thick-border-black">Griffin</div>
  </div>
</div>