.flex-container {
  display: flex;
  flex-direction: row;
  text-align: center;
  width:100%;
}
.flex-item-left {
  flex: 50%;
padding:10px;
}
.flex-item-right {
  flex: 50%;
padding: 10px;
}
@media (max-width: 800px) {
  .flex-container {
    flex-direction: column;
  }
}