:root {
            --primary-blue: #274386;
            --secondary-bronze: #c09068;
            --gradient-bg: linear-gradient(135deg, #274386 0%, #c09068 100%);
            --dark: #1a1a1a;
            --light: #f8f9fa;
            --white: #ffffff;
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            background: var(--light);
            color: #333;
            overflow-x: hidden;
        }

        /* Navigation Menu */
        .top-nav {
            background: var(--gradient-bg);
            color: white;
            padding: 0.8rem 0;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1100;
            transform: translateY(-100%);
            animation: slideDownNav 0.8s ease-out 0.3s forwards;
        }

        @keyframes slideDownNav {
            to { transform: translateY(0); }
        }

        .nav-brand {
            font-size: 1.5rem;
            font-weight: 700;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s ease;
        }

        .nav-brand:hover {
            color: white;
            transform: scale(1.05);
        }

        .nav-brand i {
            font-size: 1.8rem;
            animation: bounce 2s infinite;
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
            40% { transform: translateY(-5px); }
            60% { transform: translateY(-3px); }
        }

        .home-btn {
            background: rgba(255,255,255,0.2);
            border: 2px solid rgba(255,255,255,0.3);
            color: white;
            padding: 0.6rem 1.5rem;
            border-radius: 25px;
            font-weight: 600;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }

        .home-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s ease;
        }

        .home-btn:hover::before {
            left: 100%;
        }

        .home-btn:hover {
            background: white;
            color: var(--primary-blue);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255,255,255,0.3);
        }

        .breadcrumb-nav {
            background: white;
            padding: 1rem 0;
            margin-top: 70px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            animation: fadeInUp 0.6s ease-out 0.5s both;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .breadcrumb {
            background: none;
            margin: 0;
            padding: 0;
        }

        .breadcrumb-item {
            font-weight: 500;
        }

        .breadcrumb-item.active {
            color: var(--secondary-bronze);
            font-weight: 600;
        }

        .breadcrumb-item a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .breadcrumb-item a:hover {
            color: var(--secondary-bronze);
            transform: translateX(3px);
        }

        /* Header */
        .pdf-header {
            background: var(--gradient-bg);
            color: white;
            padding: 2rem 0;
            position: relative;
            overflow: hidden;
            animation: fadeInScale 0.8s ease-out 0.7s both;
        }

        @keyframes fadeInScale {
            from {
                opacity: 0;
                transform: scale(0.95);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .pdf-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
            animation: float 6s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }

        .pdf-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin: 0;
            position: relative;
            z-index: 2;
            animation: slideInLeft 0.8s ease-out 0.9s both;
        }

        @keyframes slideInLeft {
            from {
                opacity: 0;
                transform: translateX(-50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .pdf-subtitle {
            opacity: 0.9;
            margin: 0;
            font-size: 1.1rem;
            position: relative;
            z-index: 2;
            animation: slideInRight 0.8s ease-out 1.1s both;
        }

        @keyframes slideInRight {
            from {
                opacity: 0;
                transform: translateX(50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .pdf-icon {
            font-size: 3rem;
            opacity: 0.8;
            animation: rotateIn 1s ease-out 1.3s both;
        }

        @keyframes rotateIn {
            from {
                opacity: 0;
                transform: rotate(-180deg) scale(0.5);
            }
            to {
                opacity: 0.8;
                transform: rotate(0deg) scale(1);
            }
        }

        /* Controls Bar */
        .controls-bar {
            background: white;
            padding: 1rem 0;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            position: sticky;
            top: 70px;
            z-index: 1000;
            transition: all 0.3s ease;
            animation: slideInDown 0.6s ease-out 1.5s both;
        }

        @keyframes slideInDown {
            from {
                opacity: 0;
                transform: translateY(-30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .controls-bar.scrolled {
            box-shadow: 0 4px 25px rgba(0,0,0,0.15);
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(10px);
        }

        .control-btn {
            background: var(--light);
            border: 2px solid transparent;
            color: var(--primary-blue);
            padding: 0.6rem 1.2rem;
            border-radius: 12px;
            font-weight: 500;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            margin: 0 0.25rem;
            position: relative;
            overflow: hidden;
        }

        .control-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(39, 67, 134, 0.1), transparent);
            transition: left 0.5s ease;
        }

        .control-btn:hover::before {
            left: 100%;
        }

        .control-btn:hover {
            background: var(--primary-blue);
            color: white;
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 8px 25px rgba(39, 67, 134, 0.3);
        }

        .control-btn:active {
            transform: translateY(-1px) scale(1.02);
        }

        .control-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .control-btn.active {
            background: var(--secondary-bronze);
            color: white;
            box-shadow: 0 4px 15px rgba(192, 144, 104, 0.3);
        }

        .page-info {
            background: var(--gradient-bg);
            color: white;
            padding: 0.6rem 1.2rem;
            border-radius: 25px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.05); }
        }

        .zoom-controls {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }

        .zoom-slider {
            width: 120px;
            accent-color: var(--secondary-bronze);
            transition: all 0.3s ease;
        }

        .zoom-slider:hover {
            transform: scale(1.05);
        }

        .zoom-value {
            min-width: 60px;
            font-weight: 600;
            color: var(--primary-blue);
            font-size: 1rem;
        }

        /* PDF Container */
        .pdf-container {
            background: white;
            border-radius: 20px;
            box-shadow: 0 15px 40px rgba(0,0,0,0.1);
            overflow: hidden;
            margin: 2rem 0;
            position: relative;
            animation: zoomIn 0.8s ease-out 1.7s both;
        }

        @keyframes zoomIn {
            from {
                opacity: 0;
                transform: scale(0.8);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .pdf-viewer {
            position: relative;
            min-height: 600px;
            display: flex;
            justify-content: center;
            align-items: center;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            overflow: auto;
            max-height: 80vh;
        }

        .pdf-canvas {
            max-width: 100%;
            height: auto;
            box-shadow: 0 12px 35px rgba(0,0,0,0.15);
            border-radius: 12px;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: grab;
            animation: fadeInCanvas 0.6s ease-out;
        }

        @keyframes fadeInCanvas {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .pdf-canvas:active {
            cursor: grabbing;
        }

        .pdf-canvas:hover {
            transform: scale(1.02);
            box-shadow: 0 20px 50px rgba(0,0,0,0.2);
        }

        /* Loading Animation */
        .loading-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 400px;
            color: var(--primary-blue);
        }

        .loading-spinner {
            width: 80px;
            height: 80px;
            border: 6px solid var(--light);
            border-top: 6px solid var(--secondary-bronze);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 1.5rem;
            position: relative;
        }

        .loading-spinner::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 40px;
            height: 40px;
            border: 3px solid transparent;
            border-top: 3px solid var(--primary-blue);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            animation: spin 0.8s linear infinite reverse;
        }

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

        .loading-text {
            font-size: 1.2rem;
            font-weight: 600;
            animation: loadingPulse 1.5s ease-in-out infinite;
        }

        @keyframes loadingPulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.7; transform: scale(1.05); }
        }

        /* Progress Bar */
        .progress-container {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 6px;
            background: rgba(255,255,255,0.3);
            overflow: hidden;
        }

        .progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--secondary-bronze), var(--primary-blue));
            width: 0%;
            transition: width 0.4s ease;
            position: relative;
        }

        .progress-bar::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
            animation: shimmer 2s infinite;
        }

        @keyframes shimmer {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }

        /* Thumbnail Sidebar */
        .thumbnail-sidebar {
            position: fixed;
            right: -320px;
            top: 0;
            width: 300px;
            height: 100vh;
            background: white;
            box-shadow: -8px 0 30px rgba(0,0,0,0.15);
            transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 1001;
            overflow-y: auto;
        }

        .thumbnail-sidebar.open {
            right: 0;
            animation: slideInFromRight 0.4s ease-out;
        }

        @keyframes slideInFromRight {
            from { transform: translateX(100%); }
            to { transform: translateX(0); }
        }

        .thumbnail-header {
            background: var(--gradient-bg);
            color: white;
            padding: 1.5rem;
            font-weight: 600;
            position: sticky;
            top: 0;
            z-index: 10;
        }

        .thumbnail-item {
            padding: 1rem;
            border-bottom: 1px solid #eee;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 1rem;
            position: relative;
            overflow: hidden;
        }

        .thumbnail-item::before {
            content: '';
            position: absolute;
            left: -100%;
            top: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(192, 144, 104, 0.1), transparent);
            transition: left 0.5s ease;
        }

        .thumbnail-item:hover::before {
            left: 100%;
        }

        .thumbnail-item:hover {
            background: var(--light);
            transform: translateX(-8px);
            box-shadow: 8px 0 20px rgba(0,0,0,0.1);
        }

        .thumbnail-item.active {
            background: var(--secondary-bronze);
            color: white;
            transform: translateX(-8px);
        }

        .thumbnail-canvas {
            width: 70px;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            transition: all 0.3s ease;
        }

        .thumbnail-item:hover .thumbnail-canvas {
            transform: scale(1.1);
        }

        /* Floating Action Button */
        .fab-container {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 1000;
        }

        .fab {
            width: 60px;
            height: 60px;
            background: var(--gradient-bg);
            border: none;
            border-radius: 50%;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 8px 25px rgba(39, 67, 134, 0.3);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            animation: fabBounce 0.6s ease-out 2s both;
        }

        @keyframes fabBounce {
            0% { transform: scale(0) rotate(180deg); }
            50% { transform: scale(1.2) rotate(90deg); }
            100% { transform: scale(1) rotate(0deg); }
        }

        .fab:hover {
            transform: scale(1.1) rotate(15deg);
            box-shadow: 0 12px 35px rgba(39, 67, 134, 0.4);
        }

        .fab:active {
            transform: scale(0.95);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .pdf-title {
                font-size: 1.8rem;
            }
            
            .controls-bar .row > div {
                margin-bottom: 0.5rem;
            }
            
            .thumbnail-sidebar {
                width: 100%;
                right: -100%;
            }
            
            .control-btn {
                padding: 0.5rem 1rem;
                font-size: 0.9rem;
            }

            .fab-container {
                bottom: 20px;
                right: 20px;
            }

            .fab {
                width: 50px;
                height: 50px;
                font-size: 1.2rem;
            }
        }

        /* Page Transition Effects */
        .page-transition {
            animation: pageFlip 0.6s ease-in-out;
        }

        @keyframes pageFlip {
            0% { transform: rotateY(0deg); }
            50% { transform: rotateY(90deg); }
            100% { transform: rotateY(0deg); }
        }

        /* Success Animation */
        .success-checkmark {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: block;
            stroke-width: 3;
            stroke: var(--secondary-bronze);
            stroke-miterlimit: 10;
            margin: 10% auto;
            box-shadow: inset 0px 0px 0px var(--secondary-bronze);
            animation: fill 0.4s ease-in-out 0.4s forwards, scale 0.3s ease-in-out 0.9s both;
        }

        @keyframes scale {
            0%, 100% { transform: none; }
            50% { transform: scale3d(1.1, 1.1, 1); }
        }

        @keyframes fill {
            100% { box-shadow: inset 0px 0px 0px 30px var(--secondary-bronze); }
        }
		/* Navigation */
        .navbar {
            background: rgba(255, 255, 255, 0.95) !important;
            backdrop-filter: blur(15px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            padding: 1rem 0;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: var(--gradient-bg);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-nav .nav-link {
            font-weight: 500;
            color: #333 !important;
            margin: 0 0.5rem;
            transition: all 0.3s ease;
            position: relative;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary-blue) !important;
        }

        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary-bronze);
            transition: width 0.3s ease;
        }

        .navbar-nav .nav-link:hover::after {
            width: 100%;
        }

        .btn-nav {
            background: var(--gradient-bg);
            border: none;
            color: white;
            padding: 0.5rem 1.5rem;
            border-radius: 25px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(39, 67, 134, 0.3);
            color: white;
        }