I have this css-grid example...
.toolbar {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  background: purple;
}
.tb-left {
  justify-self: start;
  background: green;
}
.tb-right {
  justify-self: end;
  background: yellow;
}
<div class="toolbar">
  <div class="tb-left">TB left</div>
  <div class="tb-right">TB Right</div>
</div>
.tb-left and .th-right are not at the same row level.
How can I made them both be at the same level?