Edit in JSFiddle

body {
	width: 100%;
  min-height: 100vh;
	padding-bottom: 150px;
  background-image: linear-gradient(45deg, #F7CAC9 15%, #91A8D0 85%);
}


.h1 {
  margin: 2em;
  font-family: 'Dancing Script', cursive;
  color: rgba(white, .85);
}

.wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.inner {
  display: block;
	transform-style: preserve-3d;
  perspective: 800px;
}

@media (min-width: 769px) {
  .table {
    display: flex;
    //
    tr {
      display: flex;
      flex-direction: column;
    }
    th {
      border-top: 0;
      border-bottom: 0 !important;
    }
    td {
      border-top: 0;
    }
  }
  .table_body {
    display: flex;
  }
}

.table_head {
  background-color: rgba(black,.1);
}

.table_body {
  background-color: rgba(white,.35);
}

<h1 class="h1 font-weight-bold text-xs-center text-capitalize">responsive table</h1>

	<div class="wrap">
		<div class="inner">
      <table class="table">
        <thead class="table_head">
          <tr>
            <th>titleA</th>
            <th>titleB</th>
            <th>titleC</th>
            <th>titleD</th>
          </tr>
        </thead>
        <tbody class="table_body">
          <tr>
           <td>a01</td>
           <td>a02</td>
           <td>a03</td>
           <td>a04</td>
          </tr>
          <tr>
           <td>b01</td>
           <td>b02</td>
           <td>b03</td>
           <td>b04</td>
          </tr>
          <tr>
            <td>c01</td>
            <td>c02</td>
            <td>c03</td>
            <td>c04</td>
          </tr>
          <tr>
            <td>d01</td>
            <td>d02</td>
            <td>d03</td>
            <td>d04</td>
          </tr>
        </tbody>
      </table>
		</div>
	</div>