* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* Screen reader only content */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* Focus styles for accessibility */
        *:focus {
            outline: 2px solid #4f46e5;
            outline-offset: 2px;
        }

        button:focus,
        input:focus,
        textarea:focus {
            outline: 2px solid #4f46e5;
            outline-offset: 2px;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            backdrop-filter: blur(10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }

        .header {
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            color: white;
            padding: 30px;
            text-align: center;
        }

        .header h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            font-weight: 700;
        }

        .header p {
            font-size: 1.1rem;
            opacity: 0.9;
        }

        .main-content {
            padding: 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            min-height: 600px;
        }

        .upload-section {
            background: #f8fafc;
            border-radius: 16px;
            padding: 30px;
            border: 2px dashed #cbd5e1;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
        }

        .upload-section:hover {
            border-color: #4f46e5;
            background: #f1f5f9;
            transform: translateY(-2px);
        }

        .upload-section.dragover {
            border-color: #4f46e5;
            background: #eef2ff;
            transform: scale(1.02);
        }

        .upload-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 2rem;
            color: white;
        }

        .file-input {
            display: none;
        }

        .upload-btn {
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 20px;
        }

        .upload-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(79, 70, 229, 0.3);
        }

        .controls {
            display: flex;
            gap: 15px;
            margin-top: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .page-nav {
            display: flex;
            align-items: center;
            gap: 10px;
            background: white;
            padding: 10px 15px;
            border-radius: 10px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }

        .page-nav button {
            background: #4f46e5;
            color: white;
            border: none;
            width: 35px;
            height: 35px;
            border-radius: 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
        }

        .page-nav button:hover:not(:disabled) {
            background: #3730a3;
            transform: scale(1.1);
        }

        .page-nav button:disabled {
            background: #cbd5e1;
            cursor: not-allowed;
        }

        .page-info {
            font-weight: 600;
            color: #374151;
            min-width: 100px;
            text-align: center;
        }

        .extract-btn {
            background: linear-gradient(135deg, #059669, #047857);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .extract-btn:hover:not(:disabled) {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(5, 150, 105, 0.3);
        }

        .extract-btn:disabled {
            background: #9ca3af;
            cursor: not-allowed;
        }

        .preview-section {
            display: flex;
            flex-direction: column;
        }

        .canvas-container {
            background: white;
            border-radius: 16px;
            padding: 20px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            margin-bottom: 20px;
            text-align: center;
            min-height: 400px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        #pdfCanvas {
            max-width: 100%;
            max-height: 400px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

        .results-section {
            grid-column: 1 / -1;
            margin-top: 40px;
        }

        .results-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .results-header h3 {
            font-size: 1.5rem;
            color: #374151;
            margin-bottom: 10px;
            font-weight: 700;
        }

        .export-buttons {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .download-btn {
            background: #059669;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .download-btn:hover {
            background: #047857;
            transform: translateY(-1px);
        }

        .dropdown {
            position: relative;
            display: inline-block;
        }

        .dropdown-content {
            display: none;
            position: absolute;
            right: 0;
            background-color: white;
            min-width: 160px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
            border-radius: 8px;
            z-index: 1;
            overflow: hidden;
            border: 1px solid #e5e7eb;
        }

        .dropdown-content a {
            color: #374151;
            padding: 12px 16px;
            text-decoration: none;
            display: block;
            transition: background-color 0.2s ease;
        }

        .dropdown-content a:hover {
            background-color: #f3f4f6;
        }

        .dropdown.active .dropdown-content {
            display: block;
        }

        .status-message {
            padding: 10px;
            margin: 10px 0;
            border-radius: 6px;
            font-weight: 500;
            text-align: center;
            transition: all 0.3s ease;
        }

        .status-info {
            background-color: #dbeafe;
            color: #1e40af;
            border: 1px solid #93c5fd;
        }

        .status-success {
            background-color: #dcfce7;
            color: #166534;
            border: 1px solid #86efac;
        }

        .status-error {
            background-color: #fee2e2;
            color: #dc2626;
            border: 1px solid #fca5a5;
        }

        .library-error {
            margin: 20px 0;
            padding: 20px;
            background: #fef2f2;
            border: 1px solid #fecaca;
            border-radius: 12px;
            color: #b91c1c;
        }

        .library-error h4 {
            margin: 0 0 10px 0;
            font-size: 1.1rem;
        }

        .library-error p {
            margin: 5px 0;
            line-height: 1.5;
        }

        .demo-btn {
            background: linear-gradient(135deg, #059669, #047857);
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            margin-left: 10px;
        }

        .demo-btn:hover {
            background: linear-gradient(135deg, #047857, #065f46);
            transform: translateY(-1px);
        }

        .copy-btn {
            background: #4f46e5;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .copy-btn:hover {
            background: #3730a3;
            transform: translateY(-1px);
        }

        #extractedText {
            width: 100%;
            min-height: 200px;
            padding: 20px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            line-height: 1.6;
            background: #f9fafb;
            resize: vertical;
            transition: border-color 0.3s ease;
        }

        #extractedText:focus {
            outline: none;
            border-color: #4f46e5;
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
        }

        .progress-container {
            margin-top: 20px;
            display: none;
        }

        .progress-bar {
            width: 100%;
            height: 8px;
            background: #e5e7eb;
            border-radius: 4px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #4f46e5, #7c3aed);
            width: 0%;
            transition: width 0.3s ease;
            border-radius: 4px;
        }

        .progress-text {
            text-align: center;
            margin-top: 10px;
            font-weight: 600;
            color: #374151;
        }

        .placeholder {
            color: #9ca3af;
            font-style: italic;
        }

        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 20px;
            }
            
            .header h1 {
                font-size: 2rem;
            }
            
            .controls {
                flex-direction: column;
                align-items: center;
            }
        }