border-s acing not working with mat table attribute code example

Example: how to apply border to table in angular

td.mat-cell {
 /* row padding */
 padding: 16px 0;
 /* row border */
 border-bottom: 1px solid #ffa600;
 border-top: 1px solid #ffa600;
}

td.mat-cell:first-child {
  /* row border */
  border-left: 1px solid #ffa600;
}

td.mat-cell:last-child {
  /* row border */
  border-right: 1px solid #ffa600;
}

table {
  /* row spacing / margin */
  border-spacing: 0 8px !important;
}