flex-wrap: wrap;}.top {flex: 50px 0 0; width: 100px; height: 100px; background: red; flex-grow: 3; font-size: 18px; color: #fff; text-align: center;}.bottom { width: 100%; display: flex;} .bottom-first { width: 50%; background: blue; } .bottom-second{ width: 50%; background: orange; }</style>
