<!DOCTYPE html>
<!--
 | Absolutely positioned elements are positioned relative to their containing
 | block when specifying left and top.  Their containing block is their first
 | ancestor with a position that is set to 'relative', 'absolute' or 'fixed'.
 -->
<html>
<head>
  <style>
    body {
      margin: 0;
    }
    .outer-absolute-block {
      position: absolute;
    }
    .static-block {
      position: static;
      width: 100px;
      height: 100px;
      background-color: rgb(0, 255, 100);
    }
    .inner-absolute-block {
      position: absolute;
      width: 50px;
      height: 50px;
      left: -100px;
      top: 100px;
      background-color: rgb(0, 100, 255);
    }
  </style>
</head>

<body dir="rtl">
  <div class="outer-absolute-block">
    <div class="static-block"></div>
    <div class="inner-absolute-block"></div>
  </div>
</body>
</html>