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css-mastery-16-master


			
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							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Stacking contexts and opacity</title>
  <style>
    .a, .b, .c, .d {
      position: absolute;
      border: 2px solid #333;
      width: 200px;
      height: 100px;
    }
    .a {
      top: 10px;
      left: 10px;
      background-color: #f3bf8b;
    }
    .b {
      background-color: #5a6bff;
      opacity: 0.5;
      top: 20px;
      left: 20px;
    }
    .c {
      top: 10px;
      left: 10px;
      background-color: #e299f3;
      z-index: 9999;
    }
    .d {
      top: 40px;
      left: 40px;
      background-color: #acf3ae;
      z-index: 3;
    }


  </style>
</head>
<body>  
  <div class="a"></div>
  <div class="b"><div class="c"></div></div>
  <div class="d"></div>
</body>
</html>