.grid-demo-3 {
  display: grid;
  grid-template-columns: 80px;
  grid-auto-columns: 120px 160px 100px;
  gap: 10px;
  background-color: #f0f0f0;
  padding: 15px;
  border-radius: 5px;
}

.grid-item-3 {
  background-color: #FF9800;
  color: white;
  padding: 15px;
  text-align: center;
  border-radius: 4px;
  font-weight: bold;
  font-size: 14px;
}

.grid-item-3:nth-child(2) { grid-column: 2; }
.grid-item-3:nth-child(3) { grid-column: 3; }
.grid-item-3:nth-child(4) { grid-column: 4; }
.grid-item-3:nth-child(5) { grid-column: 5; }
.grid-item-3:nth-child(6) { grid-column: 6; }