:root {
            --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --success-gradient: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
            --warning-gradient: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
            --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            --hover-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
            --primary-color: #667eea;
            --accent-color: #764ba2;
            --text-primary: #2d3748;
            --text-secondary: #718096;
            --background: #f8fafc;
            --surface: #ffffff;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: var(--background);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Hero Section */
        .hero-section {
            background: var(--primary-gradient);
            color: white;
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
        }

        .hero-background {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.1;
        }

        .floating-shapes {
            position: absolute;
            width: 100%;
            height: 100%;
        }

        .shape {
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            animation: float 6s ease-in-out infinite;
        }

        .shape:nth-child(1) { width: 80px; height: 80px; top: 20%; left: 10%; animation-delay: 0s; }
        .shape:nth-child(2) { width: 120px; height: 120px; top: 60%; left: 80%; animation-delay: 2s; }
        .shape:nth-child(3) { width: 60px; height: 60px; top: 80%; left: 20%; animation-delay: 4s; }

        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(180deg); }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .hero-title {
            font-weight: 800;
            font-size: clamp(2.5rem, 5vw, 4rem);
            margin-bottom: 1rem;
            background: linear-gradient(45deg, #ffffff, #e2e8f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.25rem;
            font-weight: 400;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .stats-row {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-top: 3rem;
        }

        .stat-item {
            text-align: center;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            display: block;
        }

        .stat-label {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        /* Filter Section */
        .filter-section {
            background: var(--surface);
            padding: 2rem 0;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .filter-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .filter-btn {
            padding: 0.75rem 1.5rem;
            border: 2px solid #e2e8f0;
            background: transparent;
            border-radius: 50px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.3s ease;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .filter-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: var(--primary-gradient);
            transition: left 0.3s ease;
            z-index: -1;
        }

        .filter-btn:hover::before,
        .filter-btn.active::before {
            left: 0;
        }

        .filter-btn:hover,
        .filter-btn.active {
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }

        /* Projects Section */
        .projects-section {
            padding: 80px 0;
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .project-card {
            background: var(--surface);
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
            cursor: pointer;
        }

        .project-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--primary-gradient);
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: 1;
        }

        .project-card:hover::before {
            opacity: 0.05;
        }

        .project-card:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: var(--hover-shadow);
        }

        .project-image-container {
            position: relative;
            height: 250px;
            overflow: hidden;
            background: linear-gradient(45deg, #f8fafc, #e2e8f0);
        }

        .project-image {
            width: 100%;
            height: 100%;
            object-fit: contain;
            padding: 2rem;
            transition: transform 0.4s ease;
        }

        .project-card:hover .project-image {
            transform: scale(1.1);
        }

        .project-overlay {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 0.5rem;
            opacity: 0;
            transform: translateY(-10px);
            transition: all 0.3s ease;
        }

        .project-card:hover .project-overlay {
            opacity: 1;
            transform: translateY(0);
        }

        .project-content {
            padding: 2rem;
            position: relative;
            z-index: 2;
        }

        .project-category {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: var(--primary-gradient);
            color: white;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 1rem;
        }

        .project-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }

        .project-description {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 1.5rem;
        }

        .project-tech {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }

        .tech-tag {
            padding: 0.25rem 0.75rem;
            background: rgba(102, 126, 234, 0.1);
            color: var(--primary-color);
            border-radius: 12px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        .project-actions {
            display: flex;
            gap: 1rem;
        }

        .action-btn {
            flex: 1;
            padding: 0.75rem;
            border: none;
            border-radius: 12px;
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
            text-decoration: none;
            text-align: center;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

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

        .btn-secondary-action {
            background: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
        }

        .action-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
        }

        /* Modal Styles */
        .modal-content {
            border: none;
            border-radius: 24px;
            overflow: hidden;
        }

        .modal-header {
            background: var(--primary-gradient);
            color: white;
            border: none;
            padding: 2rem;
        }

        .modal-title {
            font-weight: 700;
            font-size: 1.5rem;
        }

        .btn-close {
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            opacity: 1;
        }

        .modal-body {
            padding: 2rem;
        }

        .modal-image {
            width: 100%;
            height: 300px;
            object-fit: contain;
            border-radius: 16px;
            margin-bottom: 2rem;
        }

        .feature-list {
            list-style: none;
            padding: 0;
        }

        .feature-list li {
            padding: 0.5rem 0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .feature-list li::before {
            content: '✓';
            color: #48bb78;
            font-weight: bold;
            font-size: 1.2rem;
        }

        /* Footer */
        .footer {
            background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
            color: white;
            padding: 3rem 0;
            text-align: center;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0 60px;
            }
            
            .stats-row {
                gap: 2rem;
            }
            
            .stat-number {
                font-size: 2rem;
            }
            
            .projects-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            
            .filter-buttons {
                gap: 0.5rem;
            }
            
            .filter-btn {
                padding: 0.5rem 1rem;
                font-size: 0.9rem;
            }
        }

        /* Animation for filtering */
        .project-card.hidden {
            opacity: 0;
            transform: scale(0.8);
            pointer-events: none;
        }

        .project-card.visible {
            opacity: 1;
            transform: scale(1);
            pointer-events: auto;
        }