:root {
            --primary-color: #212C5F;
            --secondary-color: #f5f7ff;
            --text-color: #333;
            /* --text-color: #FFC91B; */
            --sidebar-width: 280px;
            --header-height: 60px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f9fafb;
            color: var(--text-color);
            min-height: 100vh;
        }

        .container {
            display: flex;
            min-height: 100vh;
        }

        /* Header */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            z-index: 100;
        }

        .header-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary-color);
        }

        .header-actions {
            display: flex;
            gap: 15px;
        }

        .btn {
            padding: 8px 16px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all 0.2s ease;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }

        .btn-primary:hover {
            background-color: #FFC91B;
        }

        .btn-secondary {
            background-color: #e5e7eb;
            color: var(--text-color);
        }

        .btn-secondary:hover {
            background-color: #d1d5db;
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        /* Sidebar */
        .sidebar {
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: var(--sidebar-width);
            height: calc(100vh - var(--header-height));
            background-color: white;
            box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
            overflow-y: auto;
            transition: transform 0.3s ease;
            z-index: 50;
        }

        .sidebar.collapsed {
            transform: translateX(-100%);
        }

        .sidebar-toggle {
            position: fixed;
            top: calc(var(--header-height) + 20px);
            left: 20px;
            width: 40px;
            height: 40px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
            z-index: 60;
            transition: all 0.3s ease;
        }

        .sidebar-toggle.shifted {
            left: calc(var(--sidebar-width) + 20px);
        }

        .sidebar-toggle:hover {
            background-color: #FFC91B;
        }

        .sidebar-header {
            padding: 20px;
            border-bottom: 1px solid #e5e7eb;
        }

        .sidebar-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .search-box {
            position: relative;
        }

        .search-input {
            width: 100%;
            padding: 10px 40px 10px 15px;
            border: 1px solid #e5e7eb;
            border-radius: 6px;
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s;
        }

        .search-input:focus {
            border-color: var(--primary-color);
        }

        .search-icon {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #9ca3af;
        }

        .file-list {
            padding: 10px;
        }

        .file-item {
            display: flex;
            align-items: center;
            padding: 12px 15px;
            margin-bottom: 5px;
            border-radius: 6px;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .file-item:hover {
            background-color: var(--secondary-color);
        }

        .file-item.active {
            background-color: var(--secondary-color);
            border-left: 3px solid var(--primary-color);
        }

        .file-icon {
            color: #ef4444;
            margin-right: 12px;
            font-size: 1.2rem;
        }

        .file-info {
            flex: 1;
            overflow: hidden;
        }

        .file-name {
            font-size: 12px;
            font-weight: 500;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .file-size {
            font-size: 10px;
            color: #6b7280;
        }

        /* Main Content */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            margin-top: var(--header-height);
            padding: 20px;
            min-height: calc(100vh - var(--header-height));
            transition: margin-left 0.3s ease;
        }

        .main-content.expanded {
            margin-left: 0;
        }

        .pdf-container {
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            min-height: calc(100vh - var(--header-height) - 40px);
            display: flex;
            flex-direction: column;
        }

        .pdf-toolbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
            border-bottom: 1px solid #e5e7eb;
            position: sticky;
            top: 0;
            background-color: white;
            z-index: 10;
        }

        .pdf-title {
            font-weight: 600;
            font-size: 1.1rem;
        }

        .pdf-actions {
            display: flex;
            gap: 10px;
        }

        .pdf-viewer {
            flex: 1;
            display: flex;
            justify-content: center;
            padding: 20px;
            min-height: 600px;
        }

        #pdf-canvas {
            max-width: 100%;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            margin-bottom: 20px;
        }

        .pdf-controls {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .page-info {
            font-size: 14px;
            color: #6b7280;
        }

        .page-nav {
            display: flex;
            gap: 5px;
        }

        .page-btn {
            width: 32px;
            height: 32px;
            border: 1px solid #e5e7eb;
            background-color: white;
            border-radius: 4px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
        }

        .page-btn:hover {
            background-color: var(--secondary-color);
        }

        .page-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .zoom-controls {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .zoom-select {
            padding: 6px 10px;
            border: 1px solid #e5e7eb;
            border-radius: 4px;
            background-color: white;
            font-size: 14px;
            outline: none;
        }

        /* Loading State */
        .loading {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 400px;
        }

        .spinner {
            width: 50px;
            height: 50px;
            border: 5px solid #e5e7eb;
            border-top: 5px solid var(--primary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .loading-text {
            margin-top: 15px;
            color: #6b7280;
        }

        .progress-bar {
            width: 200px;
            height: 6px;
            background-color: #e5e7eb;
            border-radius: 3px;
            margin-top: 15px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background-color: var(--primary-color);
            border-radius: 3px;
            transition: width 0.3s ease;
        }

        /* No PDF State */
        .no-pdf {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 400px;
            color: #6b7280;
        }

        .no-pdf-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            color: #d1d5db;
        }

        .no-pdf-text {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        .no-pdf-subtext {
            font-size: 0.9rem;
        }

        /* Print Styles - CRITICAL SECTION */
        @media print {
            /* Hide everything by default */
            body * {
                visibility: hidden !important;
            }
            
            /* Show only print container and its contents */
            .print-container, 
            .print-container * {
                visibility: visible !important;
            }
            
            /* Position print container */
            .print-container {
                position: absolute !important;
                left: 0 !important;
                top: 0 !important;
                width: 100% !important;
                height: auto !important;
                padding: 0 !important;
                margin: 0 !important;
                display: block !important;
                background: white !important;
            }
            
            /* Style canvases for printing */
            .print-container canvas {
                display: block !important;
                max-width: 100% !important;
                height: auto !important;
                page-break-inside: avoid !important;
                page-break-after: always !important;
                margin: 0 auto 20px auto !important;
                box-shadow: none !important;
                border: none !important;
            }
            
            /* Remove margin from last page */
            .print-container canvas:last-child {
                page-break-after: auto !important;
                margin-bottom: 0 !important;
            }
            
            /* Ensure proper page sizing */
            @page {
                margin: 0.5in;
                size: auto;
            }
        }

        /* Print Preview Modal */
        .print-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.8);
            z-index: 1000;
            overflow: auto;
        }

        .print-modal.active {
            display: block;
        }

        .print-modal-content {
            background-color: white;
            margin: 20px auto;
            padding: 20px;
            width: 90%;
            max-width: 900px;
            border-radius: 8px;
            position: relative;
        }

        .print-modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid #e5e7eb;
        }

        .print-modal-title {
            font-size: 1.3rem;
            font-weight: 600;
        }

        .print-modal-close {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #6b7280;
            transition: color 0.2s;
        }

        .print-modal-close:hover {
            color: #333;
        }

        .print-modal-body {
            max-height: 70vh;
            overflow: auto;
            text-align: center;
        }

        .print-modal-footer {
            display: flex;
            justify-content: flex-end;
            gap: 10px;
            margin-top: 20px;
            padding-top: 15px;
            border-top: 1px solid #e5e7eb;
        }

        /* Print notification */
        .print-notification {
            position: fixed;
            top: 80px;
            right: 20px;
            background-color: #10b981;
            color: white;
            padding: 15px 20px;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            display: none;
            align-items: center;
            gap: 10px;
            z-index: 1001;
            animation: slideIn 0.3s ease;
        }

        .print-notification.show {
            display: flex;
        }

        @keyframes slideIn {
            from {
                transform: translateX(100%);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }

        /* Scrollbar Styling */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }

        ::-webkit-scrollbar-thumb {
            background: #c1c1c1;
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #a8a8a8;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .sidebar {
                width: 100%;
            }
            
            .main-content {
                margin-left: 0;
            }
            
            .sidebar-toggle.shifted {
                left: 20px;
            }
        }