, 0, 0); }
      to { opacity: 1; transform: translate3d(0, 0, 0); }
    }
  </style>
</head>

<body>
  <div class="container">
    <h1 class="heading">
      <span>Todo list</span>
      <span aria-hidden="true" aria-label="A white piece of paper with text written on it by a yellow pencil">üìù</span>
    </h1>
    <form id="add-todo-form">
      <div class="form-group">
        <input id="new-todo-input" type="text" class="input" placeholder="Anything to do today?">
        <button cla