.flex-container-1 {
  display: flex;
  gap: 10px;
  background: #e1f5fe;
  padding: 15px;
  border-radius: 5px;
}
.flex-item-1 {
  background: #29b6f6;
  color: white;
  padding: 15px;
  text-align: center;
  border-radius: 4px;
  font-weight: bold;
}
.item-auto { flex-basis: auto; }
.item-200px { flex-basis: 200px; }
.item-50percent { flex-basis: 50%; }
.item-0 { flex-basis: 0; flex-grow: 1; }