:root {
      --primary-color: #2563eb;
      --primary-hover: #1d4ed8;
      --bg-color: #f8fafc;
      --card-bg: #ffffff;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius: 12px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: 'El Messiri', sans-serif;
    }

    body {
      background-color: var(--bg-color);
      color: var(--text-main);
      /*display: flex;*/
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      /*padding: 20px;*/
    }

    .container {
      width: 100%;
      /*max-width: 800px;*/
      background: var(--card-bg);
      border-radius: var(--radius);
      box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
      padding: 30px;
      border: 1px solid var(--border-color);
    }

    header {
      text-align: center;
      margin-bottom: 25px;
      border-bottom: 2px solid var(--bg-color);
      padding-bottom: 15px;
    }

    header h1 {
      font-size: 1.8rem;
      color: var(--text-main);
      margin: 15px 5px;
    }

    header p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .controls-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 15px;
      margin-bottom: 20px;
    }

    @media (max-width: 600px) {
      .controls-grid {
        grid-template-columns: 1fr;
      }
    }

    .file-dropzone {
      border: 2px dashed #cbd5e1;
      border-radius: var(--radius);
      padding: 20px;
      text-align: center;
      cursor: pointer;
      background-color: #f1f5f9;
      transition: all 0.2s ease;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .file-dropzone:hover {
      border-color: var(--primary-color);
      background-color: #eff6ff;
    }

    .file-dropzone input[type="file"] {
      display: none;
    }

    .select-group {
      display: flex;
      flex-direction: column;
      gap: 5px;
    }

    .select-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    select, button {
      font-family: inherit;
    }

    select {
      width: 100%;
      padding: 12px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      background-color: #fff;
      color: var(--text-main);
      outline: none;
      font-size: 0.95rem;
      cursor: pointer;
    }

    select:focus {
      border-color: var(--primary-color);
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background-color: var(--primary-color);
      color: #fff;
      border: none;
      border-radius: var(--radius);
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      transition: background-color 0.2s ease;
      margin-bottom: 20px;
    }

    .btn-submit:hover:not(:disabled) {
      background-color: var(--primary-hover);
    }

    .btn-submit:disabled {
      background-color: #94a3b8;
      cursor: not-allowed;
    }

    .status-box {
      background-color: #fffbeb;
      border: 1px solid #fef3c7;
      color: #b45309;
      padding: 12px;
      border-radius: var(--radius);
      text-align: center;
      font-size: 0.95rem;
      margin-bottom: 20px;
      display: none;
    }

    .output-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 8px;
    }

    .output-header label {
      font-weight: 700;
      color: var(--text-main);
    }

    .btn-copy {
      background-color: #e2e8f0;
      color: var(--text-main);
      border: none;
      padding: 6px 14px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 0.85rem;
      transition: background-color 0.2s ease;
      display: none;
    }

    .btn-copy:hover {
      background-color: #cbd5e1;
    }

    textarea {
      width: 100%;
      height: 220px;
      padding: 15px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      background-color: #f8fafc;
      color: var(--text-main);
      font-size: 1rem;
      resize: vertical;
      outline: none;
      line-height: 1.6;
    }

    textarea:focus {
      background-color: #fff;
      border-color: var(--primary-color);
    }