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HTML

              
                <div class="container">
  <h1>Responsive CSS Tables</h1>
  <div class="table-1">
    <h2>Version 1</h2>
    <table>
      <tbody>
        <tr>
          <th>Block</th>
          <th>Element</th>
          <th>Modifier</th>
        </tr>
        <tr>
          <td data-th="Block">a person</td>
          <td data-th="Element">a hand</td>
          <td data-th="Modifier">a female person</td>
        </tr>
        <tr>
          <td data-th="Block">a menu</td>
          <td data-th="Element">a menu item</td>
          <td data-th="Modifier">a modified menu for the footer</td>
        </tr>
        <tr>
          <td data-th="Block">a search form</td>
          <td data-th="Element">a search input field</td>
          <td data-th="Modifier">a search input field with a particular button style</td>
        </tr>
      </tbody>
    </table>
  </div>
  <div class="table-2">
    <h2>Version 2</h2>
    <table>
      <tbody>
        <tr>
          <th>Block</th>
          <th>Element</th>
          <th>Modifier</th>
        </tr>
        <tr>
          <td data-th="Block">a person</td>
          <td data-th="Element">a hand</td>
          <td data-th="Modifier">a female person</td>
        </tr>
        <tr>
          <td data-th="Block">a menu</td>
          <td data-th="Element">a menu item</td>
          <td data-th="Modifier">a modified menu for the footer</td>
        </tr>
        <tr>
          <td data-th="Block">a search form</td>
          <td data-th="Element">a search input field</td>
          <td data-th="Modifier">a search input field with a particular button style</td>
        </tr>
      </tbody>
    </table>
  </div>
  <div class="table-3">
    <h2>Version 3</h2>
    <table>
      <tbody>
        <tr>
          <th>Exercise/Movement</th>
          <th>Do this</th>
          <th>Because</th>
        </tr>
        <tr>
          <td data-th="Exercise/Movement">Single Arm Circles</td>
          <td data-th="Do this">10 times in each direction</td>
          <td data-th="Because">I said so</td>
        </tr>
        <tr>
          <td data-th="Exercise/Movement">Arm Crossing</td>
          <td data-th="Do this">10 times, alternating arms top/bottom</td>
          <td data-th="Because">You deserve a hug</td>
        </tr>
        <tr>
          <td data-th="Exercise/Movement">Hip Circles</td>
          <td data-th="Do this">Until the world spins</td>
          <td data-th="Because">You should get your groove on</td>
        </tr>
      </tbody>
    </table>
  </div>
</div>
              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Roboto:400,700);
html {
  font-size: 62.5%;
}

body {
  font-family: 'Roboto', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1.6rem;
  line-height: 1.6;
  color: #20262e;
  background-color: #28b1de;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 5%;
}

h1 {
  text-align: center;
  font-size: 3rem;
  color: rgba(255, 255, 255, .8);
  text-transform: uppercase;
  line-height: 1.375;
  margin: 0 0 2.4rem 0;
  letter-spacing: 1px
}

h2 {
  text-align: right;
  font-size: 1.2rem;
  text-transform: uppercase;
  line-height: 1.375;
  margin: 0;
  letter-spacing: 1px
}

table {
  width: 100%;
  min-width: 300px;
  margin-bottom: 2.4rem;
  background-color: #20262e;
  color: #fff;
  overflow: hidden;
}

table tr:nth-child(even) {
  background-color: rgb(46, 53, 62);
}

table th,
table td:before {
  color: #28b1de;
}

table th {
  display: none;
}

table th,
table td {
  margin: .5rem 2rem;
  text-align: left;
}

table td {
  display: block;
  font-size: 90%;
}

table td:first-child {
  padding-top: 1rem;
}

table td:last-child {
  padding-bottom: 1rem;
}

table td:before {
  content: attr(data-th) ':\00a0';
  font-weight: bold;
  min-width: 8rem;
  display: inline-block;
}

.table-2 table td:before {
  min-width: 0;
}

.table-3 table {
  background-color: rgb(46, 53, 62);
}

.table-3 table tr:nth-child(even) {
  background-color: transparent;
}

.table-3 table td:before {
  width: 100%;
  font-weight: normal;
  opacity: .8;
}

.table-3 table td {
  margin: 0;
  padding: 1.5rem 2rem 0 2rem;
  font-weight: bold
}

.table-3 table tr td:first-child {
  background-color: #20262e;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.table-3 table tr td:last-child {
  padding-bottom: 1.5rem;
  border-bottom: 4px solid rgba(255, 255, 255, .3)
}

.table-3 table tr:last-child td:last-child {
  border-bottom: none;
}

@media (min-width: 600px) {
  table td:before {
    display: none;
  }
  table th,
  table td {
    display: table-cell;
  }
  table th,
  table td,
  table td:first-child,
  table td:last-child {
    padding: 1.5rem 2rem;
  }
  .table-3 table {
    background-color: #20262e;
  }
  .table-3 table tr:nth-child(even) {
    background-color: rgb(46, 53, 62);
  }
  .table-3 table td {
    margin: .5rem 2rem;
    padding: 1.5rem 2rem;
    font-weight: normal
  }
  .table-3 table tr td:first-child {
    background-color: transparent;
  }
  .table-3 table tr td:last-child {
    border-bottom: none;
  }
}
              
            
!

JS

              
                
              
            
!
999px

Console