.back-button {
    display: inline-block;
    margin-top: 5px;
    font-size: 18px;
    color: #333;
    background: rgb(247, 247, 233);
    padding: 10px 15px;
    border-radius: 6px;
    text-decoration: none;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    width: 70px; 
    height: 20px;
    font-size: 18px;
  }
  
  .back-button:hover {
    background: #e0e0e0;
    color: #000;
  }

  .next-button {
    position: fixed;
    top: 260px; 
    left: 20px;
    font-size: 18px;
    color: #333;
  }

#container {
    background-color: rgb(247, 247, 233); 
    margin: 0 auto;
    width: 200px;
    height:200px;
    
  }
  .square, .circle {
      width: 100px;
      height: 100px;
      display: block;
      float:left;
  }
  .circle {
      border-radius: 50%;
  }
  #blockBlue {
      background-color: rgb(126, 213, 245);
      position: relative;
  }
  #blockRed {
      background-color: rgb(191, 0, 0);
      position: relative;
  }