Vorlage:Test-Styles.css

.wikitable3 > tbody > tr > td {
  float: left;
  text-align:left;
  padding-left: 2px;
  vertical-align: top;
  width: 33.3%;
  border-left: 1px solid #a2a9b1; /* Rand links zeichnen */
  border-right: 1px solid #a2a9b1; /* Rand rechts zeichnen */
  border-top: 1px solid #a2a9b1; /* Rand oben dünn zeichnen */
  border-bottom: 1px solid #a2a9b1; /* Rand unten durch Hintergrundfarbe ausblenden */
  }

.table-head {
  border: 2px solid green;
  background: lightgoldenrodyellow;
}

.xtable { 
   display: table;
   border-spacing: 0.5em;
}

.xtable-cell {display: table-cell; border: 1px solid grey;}

.xtable-row {display: table-row; border: 1px solid red;}

.xtable-cell:first-child {
  display: block;
  width: 100%;
}

/*** Formatierung Breakpoint sm ***/
@media (max-width: 576px) {

.spgridtr {
    background-color:white;
    color: #222;
    margin: 0em 0;
    border: 0;
width: 100%;
    }

.spgridtr td {
    background-color: #f8f9fa;
    border: 1px solid #a2a9b1;
    padding: 0.2em 0.1em;
    line-height:1.4;
    }


.spgridtr > * > tr > th {
  float: left;
  padding-left: 1px; 
  padding-right: 0.4em;
    background-color: #eaecf0;
    border: 1px solid #a2a9b1;
    padding: 0.2em 0.1em;
    line-height:1.4;
width: auto
  } 

.spgridtr {
  border-collapse: separate;
  border-spacing: 0.3em;
  }

.spgridtr > * > tr > th:nth-child(1) {
  display: block;
  width:100%;
  text-align: left;
  padding-left: 1px; 
  padding-right: 0.4em;
color: green;
  } 

.spgridtr .Leerzeile {
  border-left: 0; 
  border-right: 0; 
  background: white;
  }

.spgridtr tbody > tr {
	display: grid; 
	grid-template-columns: 20% 40% 40%;
	width: 100%;
color: red;
}

.spgridtr tbody > tr:first-child {
	display: table-row;
	width: 100%;
color: red;
}

.spgridtr td:nth-child(1) {
	padding: 15px;
	grid-column: 1 / 4;
	grid-row: 1;
	background-color: #eaecf0;
	border: 1px solid #a2a9b1;
	margin-top: 5px;
}

.spgridtr tr > td:nth-child(2) {
	padding: 15px;
	grid-column: 1;
	grid-row: 2;
	background-color: #f8f9fa;
	border: 1px solid #a2a9b1;
}

.spgridtr tr > td:nth-child(3) {
	padding: 15px;
	grid-column: 2;
	grid-row: 2;
	background-color: #f8f9fa;
	border: 1px solid #a2a9b1;
}

.spgridtr tr > td:nth-child(4) {
	padding: 15px;
	grid-column: 3;
	grid-row: 2;
	background-color: #f8f9fa;
	border: 1px solid #a2a9b1;
}
}