body {
      font-family: -apple-system, BlinkMacSystemFont, sans-serif;
      max-width: 500px;
      margin: 0 auto;
      padding: 20px;
      background: #f9f9fb;
      color: #333;
    }
    h1 {
      text-align: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }
    .instructions {
      background: #e3f2fd;
      border: 1px solid #114581;
      border-radius: 8px;
      padding: 16px;
      margin-bottom: 20px;
    }
    .instructions h3 {
      margin: 0 0 12px 0;
      color: #114581;
      font-size: 1rem;
    }
    .instructions ol {
      margin: 0;
      padding-left: 20px;
    }
    .instructions li {
      margin: 8px 0;
      line-height: 1.5;
    }
    .instructions .tip {
      background: #fff3cd;
      border-left: 3px solid #ffc107;
      padding: 8px 12px;
      margin-top: 12px;
      font-size: 0.9rem;
      color: #856404;
    }
    .buttons {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 20px;
    }
    button {
      padding: 12px 16px;
      font-size: 16px;
      border: none;
      border-radius: 8px;
      background: #114581;
      color: white;
      cursor: pointer;
      font-weight: bold;
    }
    button:disabled {
      background: #ccc;
      cursor: not-allowed;
    }
    #imagePreview {
      display: none;
      margin: 16px 0;
      text-align: center;
    }
    #previewImg {
      width: 100%;
      max-width: 400px;
      border-radius: 8px;
      background: #000;
    }
    #result {
      background: #fff;
      padding: 16px;
      border-radius: 8px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
      margin-top: 16px;
      display: none;
    }
    .field {
      margin: 8px 0;
    }
    .field label {
      display: block;
      font-weight: bold;
      margin-bottom: 4px;
      color: #555;
    }
    .field span {
      font-family: monospace;
      word-break: break-all;
      background: #f1f1f1;
      padding: 6px;
      border-radius: 4px;
      display: block;
    }
    .copy-group {
      display: flex;
      gap: 10px;
      margin-top: 12px;
      flex-wrap: wrap;
    }
    .copy-group button {
      flex: 1;
      min-width: 120px;
      font-size: 14px;
      padding: 8px;
    }
    .info {
      font-size: 0.9rem;
      color: #777;
      margin-top: 8px;
    }
    .manual-input {
      margin: 16px 0;
      display: flex;
      gap: 8px;
    }
    .manual-input input {
      flex: 1;
      padding: 8px;
      border: 1px solid #ddd;
      border-radius: 4px;
    }
    .manual-input button {
      padding: 8px 12px;
      font-size: 14px;
    }
    .status {
      text-align: center;
      padding: 10px;
      margin: 10px 0;
      border-radius: 8px;
      display: none;
    }
    .status.loading {
      display: block;
      background: #e3f2fd;
      color: #1976d2;
    }
    .status.error {
      display: block;
      background: #ffebee;
      color: #c62828;
    }
    .status.success {
      display: block;
      background: #e8f5e9;
      color: #2e7d32;
    }
    .qr-type {
      display: inline-block;
      background: #114581;
      color: white;
      padding: 4px 12px;
      border-radius: 12px;
      font-size: 0.85rem;
      margin-bottom: 12px;
    }