.container{
  display: flex;
  padding: 24px;
  width: 520px;
  background-color: #eee;
  gap: 8px;
}
.container > * {
  color: white;
  background-color: dodgerblue;
  padding: 12px;
}
.container > *:first-child{
  background-color: tomato;
  display: flex;
  flex-direction: row;
  flex-basis: auto;
  flex-grow: 1;
}
.container span{
  display: none;
}