body {
            font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--dark-gray);
            overflow-x: hidden;
            background: #FAFAFA;
            margin: 0;
            padding: 0;
        }


        /* Navigation */
        nav {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            padding: 20px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 20px rgba(15, 23, 42, 0.1);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .nav-logo {
            font-weight: bold;
            font-size: 1.2rem;
            color: var(--primary-blue);
            text-decoration: none;
        }

        .nav-logo:hover {
            color: var(--accent-orange);
        }

        /* Main Content */
        main {
            min-height: calc(100vh - 80px);
            padding: 40px 0;
        }

        .poster-header {
            text-align: center;
            margin-bottom: 40px;
            padding: 40px 0;
            background: var(--gradient-bg);
            color: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(15, 23, 42, 0.2);
        }

        .poster-header h1 {
            font-size: 2.5rem;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .poster-header p {
            font-size: 1.1rem;
            opacity: 0.9;
            color: var(--text-light);
        }

        .poster-viewer {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(15, 23, 42, 0.1);
            overflow: hidden;
            border: 1px solid rgba(226, 232, 240, 0.5);
        }

        .poster-controls {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 30px;
            background: var(--gradient-bg);
            color: white;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .poster-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin: 0;
        }

        .control-buttons {
            display: flex;
            gap: 15px;
            align-items: center;
        }

        .control-btn {
            background: var(--accent-orange);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .control-btn:hover {
            background: var(--accent-orange-light);
            transform: translateY(-2px);
        }

        .control-btn:disabled {
            background: #6B7280;
            cursor: not-allowed;
            transform: none;
        }

        .page-info {
            color: var(--text-light);
            font-weight: 600;
            margin: 0 15px;
        }

        .poster-content {
            padding: 30px;
            text-align: center;
            min-height: 600px;
            background: #f8f9fa;
        }

        .loading-message {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 400px;
            color: var(--dark-gray);
        }

        .loading-spinner {
            width: 40px;
            height: 40px;
            border: 4px solid var(--light-gray);
            border-top: 4px solid var(--accent-orange);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 20px;
        }

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

        #pdfCanvas {
            max-width: 100%;
            height: auto;
            border: 1px solid var(--light-gray);
            border-radius: 8px;
            box-shadow: 0 8px 25px rgba(15, 23, 42, 0.1);
            background: white;
        }

        .error-message {
            color: #dc2626;
            background: #fef2f2;
            padding: 20px;
            border-radius: 8px;
            border: 1px solid #fecaca;
            margin: 20px 0;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-orange);
            text-decoration: none;
            font-weight: 600;
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }

        .back-link:hover {
            color: var(--accent-orange-light);
            transform: translateX(-5px);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                background: white;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
                z-index: 100;
                padding: 20px 0;
            }

            .nav-links.open {
                display: flex;
            }

            .menu-toggle {
                display: block;
            }

            .poster-header h1 {
                font-size: 2rem;
            }

            .poster-controls {
                flex-direction: column;
                gap: 15px;
                text-align: center;
            }

            .control-buttons {
                flex-wrap: wrap;
                justify-content: center;
            }

            .control-btn {
                padding: 8px 16px;
                font-size: 0.9rem;
            }

            .poster-content {
                padding: 20px;
            }
        }