x;
    background-color: blue;
  }
  </style>

  <main class="container">
    <div class="shape"></div>
    <div class="longbox" style="inset-block-start: 0; inset-inline-start: 0;"></div> <!-- Saturate the margin space -->
    <div class="box" style="block-size: 24px; inset-block-start: 20px; inset-inline-start: 140px;"></div> <!-- Box at corner -->
    <div class="box" style="block-size: 36px; inset-block-start: 44px; inset-inline-start: 140px;"></div>
    <div class="box" style="block-size: 36px; inset-b