:root{
  /*--mrn-table-dispose: 1fr 1fr 1fr;
  --mrn-table-nb-colone: 3;
  --mrn-table-nb-colone-line: 4;*/

  --background-accent:blue;
  --color-accent:red;
  --background-primary:white;
  --color-primary:black;
}
.mrn-table {
  max-width: 100%;
  display: grid;
  grid-template-columns: var(--mrn-table-dispose);
}

.mrn-table>.mrn-table-header{
  font-weight: bold;
  background: var(--background-accent);
  color: var(--color-accent);
}
.mrn-table>*{
  background: var(--background-primary);
  color: var(--color-primary);
  align-self: center;
  justify-self: center;
}
.mrn-table>.mrn-fullLine{
  grid-column: 1 / var(--mrn-table-nb-colone-line);
}