/* ===== TOOL HEADER ===== */
    .tool-header {
      text-align: center;
      padding: 3rem 2rem 1rem;
      background: var(--accent);
      background-size: cover;
    }
    
    .tool-header-content {
      max-width: 700px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }
    .tool-title {
      font-size: 2.8rem;
      color: var(--secondary);
      margin-bottom: 1rem;
      font-weight: 800;
    }

    .tool-subtitle {
      font-size: 1.2rem;
      color: var(--secondary-light);
      max-width: 600px;
      margin: 0 auto 1.5rem;
      line-height: 1.6;
    }

    .tool-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      background: rgba(44, 62, 80, 0.08);
      color: var(--secondary);
      padding: 0.6rem 1.2rem;
      border-radius: 30px;
      font-size: 0.95rem;
      margin-top: 1rem;
    }

    .tool-header-graphic {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 3rem;
      margin-top: 2.5rem;
      opacity: 0.9;
    }

    .graphic-pdf, .graphic-xlsx {
      width: 100px;
      height: 130px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
      position: relative;
      transform: rotate(3deg);
    }

    .graphic-pdf {
      background: var(--primary);
    }

    .graphic-xlsx {
      background: var(--excel-primary);
      transform: rotate(-3deg);
    }

    .graphic-pdf i {
      font-size: 3.5rem;
      color: var(--light);
    }

    .graphic-xlsx i {
      font-size: 3.5rem;
      color: var(--light);
    }

    .graphic-arrow i {
      font-size: 2.5rem;
      color: var(--secondary-light);
      opacity: 0.7;
    }

    /* ===== MAIN TOOL CONTAINER ===== */
    .tool-container {
      max-width: 1000px;
      margin: -50px auto 0;
      padding: 0 2rem 4rem;
      position: relative;
      z-index: 10;
    }

    .tool-wrapper {
      background: var(--light);
      border-radius: 20px;
      box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
      overflow: hidden;
    }

    /* ===== UPLOAD AREA ===== */
    .upload-area {
      border: 2px dashed rgba(51, 51, 51, 0.2);
      border-radius: 16px;
      padding: 3.5rem 2rem;
      text-align: center;
      transition: all 0.3s;
      background: var(--accent);
      cursor: pointer;
      margin: 2.5rem;
      position: relative;
      transition: all 0.3s ease;
    }

    .upload-area.highlight {
      border-color: var(--primary);
      background: rgba(217, 79, 79, 0.03);
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    }

    .upload-icon {
      font-size: 4.5rem;
      color: var(--primary);
      margin-bottom: 1.5rem;
      opacity: 0.8;
    }

    .upload-text h3 {
      font-size: 1.6rem;
      color: var(--secondary);
      margin-bottom: 0.5rem;
      font-weight: 600;
    }

    .upload-text p {
      color: var(--secondary-light);
      margin-bottom: 1.5rem;
      font-size: 1.05rem;
    }

    .upload-btn {
      display: inline-block;
      background: var(--primary);
      color: var(--light);
      padding: 1rem 2.5rem;
      border-radius: 50px;
      font-weight: 600;
      text-decoration: none;
      transition: all 0.3s ease;
      box-shadow: 0 5px 20px rgba(217, 79, 79, 0.3);
      cursor: pointer;
      border: none;
      font-size: 1.05rem;
      margin-top: 1rem;
    }

    .upload-btn:hover {
      background: var(--primary-dark);
      transform: translateY(-3px);
      box-shadow: 0 8px 25px rgba(217, 79, 79, 0.4);
    }

    .file-input {
      position: absolute;
      width: 100%;
      height: 100%;
      top: 0;
      left: 0;
      opacity: 0;
      cursor: pointer;
    }

    .upload-features {
      display: flex;
      justify-content: center;
      gap: 2rem;
      margin-top: 2.5rem;
      flex-wrap: wrap;
    }

    .feature {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      background: rgba(44, 62, 80, 0.05);
      padding: 0.7rem 1.3rem;
      border-radius: 30px;
      font-size: 0.95rem;
      color: var(--secondary);
    }

    /* ===== FILE INFO ===== */
    .file-info-container {
      padding: 0 2.5rem 1rem;
      display: none;
    }

    .file-info-card {
      display: flex;
      align-items: center;
      padding: 1.2rem;
      border: 1px solid rgba(51, 51, 51, 0.1);
      border-radius: 12px;
      background: var(--accent);
      margin-bottom: 1rem;
    }

    .file-icon {
      width: 50px;
      height: 50px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(217, 79, 79, 0.1);
      border-radius: 10px;
      margin-right: 1.2rem;
      flex-shrink: 0;
    }

    .file-icon i {
      color: var(--primary);
      font-size: 1.5rem;
    }

    .file-name {
      font-weight: 600;
      color: var(--secondary);
      margin-bottom: 0.3rem;
      font-size: 1.1rem;
    }

    .file-size {
      font-size: 0.9rem;
      color: var(--secondary-light);
    }

    .file-actions {
      display: flex;
      gap: 0.8rem;
    }

    .file-action-btn {
      background: transparent;
      border: none;
      color: var(--secondary-light);
      cursor: pointer;
      font-size: 1.2rem;
      transition: color 0.3s;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .file-action-btn:hover {
      background: rgba(0, 0, 0, 0.03);
      color: var(--primary);
    }

    /* ===== CONVERSION OPTIONS ===== */
    .conversion-options {
      padding: 0 2.5rem 2rem;
      display: none;
    }

    .options-header {
      margin-bottom: 1.8rem;
      padding-bottom: 1.2rem;
      border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

    .options-title {
      font-size: 1.5rem;
      color: var(--secondary);
      margin-bottom: 0.4rem;
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }

    .options-title i {
      color: var(--primary);
    }

    .options-subtitle {
      color: var(--secondary-light);
      font-size: 1rem;
      margin-left: 2.3rem;
    }

    .options-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 1.8rem;
    }

    .option-card {
      background: var(--light);
      border-radius: 14px;
      padding: 1.8rem;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.03);
      transition: all 0.3s ease;
      border: 1px solid rgba(51, 51, 51, 0.1);
      display: flex;
      gap: 1.5rem;
      align-items: flex-start;
    }

    .option-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
      border-color: var(--primary);
    }

    .option-icon {
      width: 50px;
      height: 50px;
      background: rgba(217, 79, 79, 0.05);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .option-icon i {
      color: var(--primary);
      font-size: 1.4rem;
    }

    .option-content {
      flex-grow: 1;
    }

    .option-content h4 {
      font-size: 1.2rem;
      color: var(--secondary);
      margin-bottom: 1.2rem;
      font-weight: 600;
    }

    .option-control {
      margin-top: 1rem;
    }

    .option-toggle {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 1.2rem;
      cursor: pointer;
      font-size: 1.05rem;
      color: var(--secondary);
    }

    .toggle-slider {
      position: relative;
      display: inline-block;
      width: 50px;
      height: 26px;
      background: #e0e0e0;
      border-radius: 34px;
      transition: .4s;
    }

    .toggle-slider:before {
      position: absolute;
      content: "";
      height: 20px;
      width: 20px;
      left: 3px;
      bottom: 3px;
      background-color: white;
      transition: .4s;
      border-radius: 50%;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .option-toggle input {
      opacity: 0;
      width: 0;
      height: 0;
    }

    input:checked + .toggle-slider {
      background-color: var(--primary);
    }

    input:checked + .toggle-slider:before {
      transform: translateX(24px);
    }

    .select-wrapper {
      position: relative;
      width: 100%;
    }

    .select-wrapper select {
      width: 100%;
      padding: 0.9rem 1.2rem;
      border: 1px solid rgba(51, 51, 51, 0.2);
      border-radius: 12px;
      background: var(--light);
      color: var(--secondary);
      font-size: 1rem;
      cursor: pointer;
      appearance: none;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
      transition: all 0.3s;
    }

    .select-wrapper select:focus {
      border-color: var(--primary);
      outline: none;
      box-shadow: 0 0 0 3px rgba(217, 79, 79, 0.1);
    }

    .select-wrapper i {
      position: absolute;
      right: 15px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--secondary-light);
      pointer-events: none;
    }

    /* ===== CONVERT ACTIONS ===== */
    .convert-actions {
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 0 2.5rem 2.5rem;
    }

    .convert-btn {
      background: var(--primary);
      color: var(--light);
      border: none;
      padding: 1.2rem 3.5rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1.2rem;
      cursor: pointer;
      transition: all 0.3s;
      display: flex;
      align-items: center;
      gap: 1rem;
      box-shadow: 0 5px 25px rgba(217, 79, 79, 0.3);
      margin-bottom: 1.5rem;
    }

    .convert-btn:hover {
      background: var(--primary-dark);
      transform: translateY(-3px);
      box-shadow: 0 8px 30px rgba(217, 79, 79, 0.4);
    }

    .convert-btn:disabled {
      background: #d1d5db;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }

    .quality-assurance {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      color: var(--secondary);
      font-size: 1rem;
      font-weight: 500;
    }

    .quality-assurance i {
      color: #f59e0b;
    }

    /* ===== PROGRESS INDICATOR ===== */
    .progress-container {
      width: 100%;
      padding: 2.5rem;
      display: none;
      background: linear-gradient(135deg, var(--accent) 0%, rgba(244, 244, 244, 0.5) 100%);
      border-top: 1px solid rgba(0, 0, 0, 0.05);
    }

    .progress-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1.5rem;
    }

    .progress-header h4 {
      font-size: 1.3rem;
      color: var(--secondary);
      font-weight: 600;
    }

    .progress-percent {
      font-weight: 700;
      color: var(--primary);
      font-size: 1.4rem;
    }

    .progress-bar {
      height: 12px;
      background-color: rgba(51, 51, 51, 0.1);
      border-radius: 10px;
      overflow: hidden;
      margin-bottom: 1rem;
      box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
    }

    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--primary), var(--primary-dark));
      width: 0%;
      transition: width 0.5s ease;
      border-radius: 10px;
    }

    .progress-text {
      text-align: center;
      font-size: 1.05rem;
      color: var(--secondary);
      font-weight: 500;
      margin-bottom: 2rem;
    }

    .progress-details {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 2rem;
      background: var(--light);
      padding: 1.2rem;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
      max-width: 500px;
      margin: 0 auto;
    }

    .progress-details .detail {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      color: var(--secondary);
      font-size: 1rem;
    }

    .progress-details .detail i {
      font-size: 1.3rem;
      color: var(--primary);
    }

    #originalFile, #outputFile {
      font-weight: 500;
    }

    /* ===== OCR AND LAYOUT OPTIONS ===== */
    .ocr-options, .layout-options {
      padding: 0 2.5rem 1rem;
      display: none;
    }

    .ocr-options h3, .layout-options h3 {
      font-size: 1.3rem;
      color: var(--secondary);
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }

    .ocr-options h3 i, .layout-options h3 i {
      color: var(--primary);
    }

    .ocr-choice, .layout-choice {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .ocr-option, .layout-option {
      display: flex;
      align-items: center;
      gap: 1rem;
      padding: 1rem;
      border: 1px solid rgba(51, 51, 51, 0.1);
      border-radius: 12px;
      cursor: pointer;
      transition: all 0.3s ease;
      background: var(--light);
    }

    .ocr-option:hover, .layout-option:hover {
      border-color: var(--primary);
      background: rgba(217, 79, 79, 0.02);
    }

    .ocr-option input, .layout-option input {
      margin: 0;
    }

    .option-text {
      display: flex;
      flex-direction: column;
      gap: 0.3rem;
    }

    .option-text strong {
      color: var(--secondary);
      font-weight: 600;
    }

    .option-text small {
      color: var(--secondary-light);
      font-size: 0.9rem;
    }

    /* ===== MESSAGE CONTAINERS ===== */
    .message-container {
      margin: 20px 0;
      padding: 15px 20px;
      border-radius: 8px;
      font-weight: 500;
      text-align: center;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      animation: slideIn 0.3s ease;
      position: relative;
      z-index: 10;
    }

    @keyframes slideIn {
      from {
        opacity: 0;
        transform: translateY(-10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    /* Success message specific styles */
    #successMessage {
      background-color: #d4edda;
      color: #155724;
      border: 1px solid #c3e6cb;
    }

    /* Error message specific styles */
    #errorMessage {
      background-color: #f8d7da;
      color: #721c24;
      border: 1px solid #f5c6cb;
    }

    /* ===== RESPONSIVE DESIGN ===== */
    @media (max-width: 768px) {
      .tool-wrapper {
        padding: 20px;
        margin: 10px;
      }
      
      .tool-header h1 {
        font-size: 2em;
      }
      
      .upload-area {
        padding: 20px;
      }
      
      .upload-content i {
        font-size: 2em;
      }
      
      .convert-btn {
        padding: 12px 30px;
        font-size: 1.1em;
      }
      
      .message-container {
        margin: 15px 0;
        padding: 12px 16px;
        font-size: 0.95em;
      }
    }

@media (max-width: 600px) {
  .upload-area {
    margin: 1rem auto;
    padding: 2rem 0.5rem;
    max-width: 95vw;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
  }
  .file-info-container {
    margin: 1rem auto;
    width: 100%;
    max-width: 95vw;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .file-info-card {
    width: 100%;
    max-width: 350px;
    margin: 0 auto 1rem auto;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    text-align: center;
  }
  .file-info {
    width: 100%;
    text-align: center;
  }
}
@media (max-width: 480px) {
  .upload-area, .file-info-container, .file-info-card {
    max-width: 99vw;
    padding: 1rem 0.2rem;
  }
}