a:hover {
      text-decoration: underline;
    }
  </style>
</head>
<body>
  <header>
    <h1>Stability Control Studio</h1>
  </header>

  <div class="main-container">
    <!-- LEFT PANEL: user input & original image -->
    <div class="panel-left">
      <h2>Configuration</h2>

      <!-- OpenAI Key (optional) -->
      <div class="field">
        <label for="openaiKey">OpenAI Key (Optional):</label>
        <input type="text" id="openaiKey" placeholder="sk-..." />
      </div>

      <!-- Stability Key (