Tabelle: Kopfzeile automatisch vorne

table tbody tr td:nth-of-type(1):before {
    content: "id";
  }
  table tbody tr td:nth-of-type(2):before {
    content: "Name";
  }
  table tbody tr td:nth-of-type(3):before {
    content: "Adesse";
  }
table tbody tr td:nth-of-type(3):before {
    content: "Telefon";

  table {
    border: 1px solid #ccc;
    border-collapse: collapse;
    margin: 0;
    padding: 0;
    width: 100%;
    table-layout: fixed;
  }

  table caption {
    font-size: 1.5em;
    margin: .5em;
  }

  table tr {
    background-color: #f8f8f8;
    border: 1px solid #ddd;
    padding: .35em;
  }

  table th,
  table td {
    padding: .625em;
    text-align: center;
  }

  table th {
    font-size: .85em;
    letter-spacing: .1em;
                background-color: #2a2a2a;
                color:#ffffff;
  }

  @media screen and (max-width: 600px) {
    table {
      border: 0;
    }

    table caption {
      font-size: 1.3em;
    }

    table thead {
      border: none;
      clip: rect(0 0 0 0);
      height: 1px;
      margin: -1px;
      overflow: hidden;
      padding: 0;
      position: absolute;
      width: 1px;
    }

    table tr {
      border-bottom: 3px solid #ddd;
      display: block;
      margin-bottom: .5em;
    }

    table td {
      border-bottom: 1px solid #ddd;
      display: block;
      font-size: .8em;
      text-align: right;
    }

    table td::before {
      content: attr(data-label);
      float: left;
      font-weight: bold;
    }

    table td:last-child {
      border-bottom: 0;
    }

table tbody tr td:nth-of-type(1):before {
    content: "id";
  }
  table tbody tr td:nth-of-type(2):before {
    content: "Name";
  }
  table tbody tr td:nth-of-type(3):before {
    content: "Adesse";
  }
table tbody tr td:nth-of-type(3):before {
    content: "Telefon";
  }
  }