receive.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Carrier Pigeon</title>

  <link rel="stylesheet" href="https://linfindel.github.io/nadircss/nadir.css">
</head>
<body class="absolute-centre column-flat">
  <div id="paste-card" class="card-flat-bottom column" style="width: calc(100% - 5rem);">
    <input autocomplete="off" id="paste-input" type="text" placeholder="Paste text here" oninput="decode()">
  </div>

  <div id="download-card" class="card-subtle-flat-top column" style="width: calc(100% - 5rem);">
    <button id="download-button" class="button-subtle" inert>
      <span id="download-icon" class="material-symbols-rounded" translate="no">download</span>
      <span id="download-text">Download file</span>
    </button>
  </div>

  <script src="receive.js"></script>
</body>
</html>