/* Sophisticated Color Palette */
        :root {
            --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --secondary-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
            --accent-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --glass-bg: rgba(255, 255, 255, 0.95);
            --glass-border: rgba(255, 255, 255, 0.2);
        }
        
        /* Premium Gradient Text */
        .gradient-text {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        /* Sophisticated Animations */
        .fade-in-up {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        
        .fade-in-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .fade-in-left {
            opacity: 0;
            transform: translateX(-30px);
            transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        
        .fade-in-left.visible {
            opacity: 1;
            transform: translateX(0);
        }
        
        .fade-in-right {
            opacity: 0;
            transform: translateX(30px);
            transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        
        .fade-in-right.visible {
            opacity: 1;
            transform: translateX(0);
        }
        
        /* Portfolio Filter Tabs */
        .filter-tab {
            padding: 0.75rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
            border: 2px solid transparent;
            background: rgba(102, 126, 234, 0.05);
            color: #667eea;
        }
        
        .filter-tab.active {
            background: var(--primary-gradient);
            color: white;
            box-shadow: 0 4px 20px rgba(102, 126, 234, 0.3);
        }
        
        .filter-tab:hover:not(.active) {
            background: rgba(102, 126, 234, 0.1);
            transform: translateY(-1px);
        }
        
        /* Portfolio Cards */
        .portfolio-card {
            background: white;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            border: 1px solid rgba(102, 126, 234, 0.1);
            position: relative;
            cursor: pointer;
        }
        
        .portfolio-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 25px 70px rgba(102, 126, 234, 0.15);
            border-color: rgba(102, 126, 234, 0.2);
        }
        
        .portfolio-image {
            height: 240px;
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(16, 185, 129, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 4rem;
            position: relative;
            overflow: hidden;
        }
        
        .portfolio-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, rgba(102, 126, 234, 0.05), rgba(16, 185, 129, 0.05));
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .portfolio-card:hover .portfolio-image::before {
            opacity: 1;
        }
        
        .portfolio-content {
            padding: 2rem;
        }
        
        .portfolio-category {
            display: inline-block;
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(16, 185, 129, 0.1));
            color: #4f46e5;
            padding: 0.4rem 1rem;
            border-radius: 15px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 1rem;
            border: 1px solid rgba(102, 126, 234, 0.2);
        }
        
        .portfolio-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
            margin: 1.5rem 0;
            padding: 1.5rem;
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.02), rgba(16, 185, 129, 0.02));
            border-radius: 16px;
            border: 1px solid rgba(102, 126, 234, 0.1);
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-number {
            font-size: 1.5rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
        }
        
        .stat-label {
            font-size: 0.75rem;
            color: #6b7280;
            font-weight: 500;
            margin-top: 0.25rem;
        }
        
        /* Service Tags */
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }
        
        .service-tag {
            background: rgba(102, 126, 234, 0.1);
            color: #4f46e5;
            padding: 0.3rem 0.8rem;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 500;
            border: 1px solid rgba(102, 126, 234, 0.2);
        }
        
        /* Case Study Modal */
        .modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(10px);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        
        .modal.active {
            opacity: 1;
            visibility: visible;
        }
        
        .modal-content {
            background: white;
            border-radius: 24px;
            max-width: 800px;
            max-height: 90vh;
            overflow-y: auto;
            margin: 2rem;
            position: relative;
            transform: scale(0.9);
            transition: transform 0.3s ease;
        }
        
        .modal.active .modal-content {
            transform: scale(1);
        }
        
        .modal-header {
            padding: 2rem 2rem 1rem;
            border-bottom: 1px solid rgba(102, 126, 234, 0.1);
        }
        
        .modal-body {
            padding: 2rem;
        }
        
        .close-modal {
            position: absolute;
            top: 1rem;
            right: 1rem;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(102, 126, 234, 0.1);
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            color: #667eea;
            font-size: 1.2rem;
        }
        
        .close-modal:hover {
            background: rgba(102, 126, 234, 0.2);
            transform: scale(1.1);
        }
        
        /* Results Timeline */
        .results-timeline {
            position: relative;
            padding: 2rem 0;
        }
        
        .results-timeline::before {
            content: '';
            position: absolute;
            left: 2rem;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, #667eea, #10b981);
        }
        
        .timeline-item {
            position: relative;
            padding-left: 4rem;
            margin-bottom: 2rem;
        }
        
        .timeline-dot {
            position: absolute;
            left: 1.25rem;
            top: 0.5rem;
            width: 1.5rem;
            height: 1.5rem;
            background: white;
            border: 3px solid #667eea;
            border-radius: 50%;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }
        
        .timeline-content {
            background: rgba(102, 126, 234, 0.02);
            padding: 1.5rem;
            border-radius: 16px;
            border: 1px solid rgba(102, 126, 234, 0.1);
        }
        
        /* Premium Button Styles */
        .btn-primary {
            background: var(--primary-gradient);
            color: white;
            padding: 1rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 20px rgba(102, 126, 234, 0.3);
            position: relative;
            overflow: hidden;
            border: none;
            cursor: pointer;
        }
        
        .btn-primary::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 0.6s;
        }
        
        .btn-primary:hover::before {
            left: 100%;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(102, 126, 234, 0.4);
        }
        
        .btn-secondary {
            border: 2px solid #667eea;
            color: #667eea;
            padding: 0.75rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            background: rgba(102, 126, 234, 0.05);
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }
        
        .btn-secondary::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 0;
            height: 100%;
            background: var(--primary-gradient);
            transition: width 0.3s ease;
            z-index: -1;
        }
        
        .btn-secondary:hover::before {
            width: 100%;
        }
        
        .btn-secondary:hover {
            color: white;
            transform: translateY(-1px);
        }
        
        /* Background Patterns */
        .bg-pattern {
            background-image: 
                radial-gradient(circle at 25% 25%, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 75% 75%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
        }
        
        /* Filter Animation */
        .portfolio-item {
            transition: all 0.5s ease;
        }
        
        .portfolio-item.hidden {
            opacity: 0;
            transform: scale(0.8);
            pointer-events: none;
        }
        
        /* Mobile Responsive */
        @media (max-width: 768px) {
            .portfolio-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .modal-content {
                margin: 1rem;
                max-height: 95vh;
            }
            
            .modal-header,
            .modal-body {
                padding: 1.5rem;
            }
        }