body {
  overflow-x: hidden;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  > * {
    background-color: gray;
    height: 200px;
    margin-top: 20px;
  }
  .both-sides {
    margin: 0 calc(50% - 50vw);
    width: 100vw;
  }
  .right {
    margin: 30px calc(50% - 50vw + 8px) 0 0;
  }
  .left {
    margin: 30px 0 0 calc(50% - 50vw + 7px);
  }
}