Bootstrap table styles (See tutorial to add Bootstrap table styles to your theme -> https://carriedils.com/add-bootstrap-table-styles-theme/)

proper-table-markup.html

<!-- 
<thead> Groups the header content in a table
<th> 	Defines a header cell in a table

<tbody> Groups the body content in a table
<td> 	Defines a cell in a table
-->

<table>
	<thead>
		<tr>
			<th>Column Header #1</th>
			<th>Column Header #2</th>
		</tr>
	</thead>

	<tbody>
		<tr>
			<th>Row Header</th>
			<td>I'm in a cell</td>
		</tr>
	</tbody>
</table>

table-styles.css

/* Pulled from https://github.com/twbs/bootstrap/blob/v4-dev/dist/css/bootstrap.css#L2079-L2241 */

.table {
  width: 100%;
  max-width: 100%;
  margin-bottom: 1rem;
}

.table th,
.table td {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid #eceeef;
}

.table thead th {
  vertical-align: bottom;
  border-bottom: 2px solid #eceeef;
}

.table tbody + tbody {
  border-top: 2px solid #eceeef;
}

.table .table {
  background-color: #fff;
}

.table-sm th,
.table-sm td {
  padding: 0.3rem;
}

.table-bordered {
  border: 1px solid #eceeef;
}

.table-bordered th,
.table-bordered td {
  border: 1px solid #eceeef;
}

.table-bordered thead th,
.table-bordered thead td {
  border-bottom-width: 2px;
}

.table-striped tbody tr:nth-of-type(odd) {
  background-color: rgba(0, 0, 0, 0.05);
}

.table-hover tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.075);
}

.table-active,
.table-active > th,
.table-active > td {
  background-color: rgba(0, 0, 0, 0.075);
}

.table-hover .table-active:hover {
  background-color: rgba(0, 0, 0, 0.075);
}

.table-hover .table-active:hover > td,
.table-hover .table-active:hover > th {
  background-color: rgba(0, 0, 0, 0.075);
}

.table-success,
.table-success > th,
.table-success > td {
  background-color: #dff0d8;
}

.table-hover .table-success:hover {
  background-color: #d0e9c6;
}

.table-hover .table-success:hover > td,
.table-hover .table-success:hover > th {
  background-color: #d0e9c6;
}

.table-info,
.table-info > th,
.table-info > td {
  background-color: #d9edf7;
}

.table-hover .table-info:hover {
  background-color: #c4e3f3;
}

.table-hover .table-info:hover > td,
.table-hover .table-info:hover > th {
  background-color: #c4e3f3;
}

.table-warning,
.table-warning > th,
.table-warning > td {
  background-color: #fcf8e3;
}

.table-hover .table-warning:hover {
  background-color: #faf2cc;
}

.table-hover .table-warning:hover > td,
.table-hover .table-warning:hover > th {
  background-color: #faf2cc;
}

.table-danger,
.table-danger > th,
.table-danger > td {
  background-color: #f2dede;
}

.table-hover .table-danger:hover {
  background-color: #ebcccc;
}

.table-hover .table-danger:hover > td,
.table-hover .table-danger:hover > th {
  background-color: #ebcccc;
}

.thead-inverse th {
  color: #fff;
  background-color: #292b2c;
}

.thead-default th {
  color: #464a4c;
  background-color: #eceeef;
}

.table-inverse {
  color: #fff;
  background-color: #292b2c;
}

.table-inverse th,
.table-inverse td,
.table-inverse thead th {
  border-color: #fff;
}

.table-inverse.table-bordered {
  border: 0;
}

.table-responsive {
  display: block;
  width: 100%;
  overflow-x: auto;
  -ms-overflow-style: -ms-autohiding-scrollbar;
}

.table-responsive.table-bordered {
  border: 0;
}