.container {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
}

.box {
  width: 50%;
  box-sizing: border-box;
  padding: 10px;
  margin-right: auto;
  margin-left: auto;
}

@media (max-width: 1300px) {
  .box {
    width: 100%;
    margin-right: auto;
    margin-left: auto;
  }
}