.margin {
      height: 1200px;
    }
    .container {
      margin: 0 auto;
      width: 600px;
    }
    .container img {
      width: 100%;
    }

    .display {
      background-color: red;
      color: #fff;
      padding: 4px 8px;
      position: fixed;
      bottom: 30px;
      right: 30px;
      opacity: 0;
    }
    .display.isActive {
      opacity: 1;
      transition: all 0.65s;
    }