How to make content in 1 line?

Question

css

How to

get this from this


https://codepen.io/pen/yLagpwW

Answer 1

.container {
    width: 600px;
    margin: auto;
    border: 1px solid black;
    padding: 5px
}

.container input {
  display: inline-block;
}

Answer 2

You don't need flexbox