* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', sans-serif;
            background-color: #f8fafc;
            overflow-x: hidden;
            line-height: 1.6;
        }
        
        /* Navigation */
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            transition: all 0.4s ease;
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }
        
        .navbar.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            padding: 0.5rem 0;
        }
        
        .navbar-brand {
            font-weight: 800;
            color: var(--primary-blue);
            font-size: 1.8rem;
            letter-spacing: -0.5px;
        }
        
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            color: var(--text-dark);
            transition: all 0.3s ease;
            position: relative;
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-blue);
            transition: width 0.3s ease;
        }
        
        .nav-link:hover, .nav-link.active {
            color: var(--primary-blue);
        }
        
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        
        /* Page Header */
        .page-header {
            background: var(--gradient-blue);
            color: white;
            padding: 150px 0 80px;
            position: relative;
            overflow: hidden;
        }
        
        .page-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        
        .page-subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
        }
        
        /* Portfolio Section */
        .portfolio-section {
            padding: 100px 0;
            background: white;
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 1rem;
            text-align: center;
            position: relative;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--gradient-blue);
            border-radius: 2px;
        }
        
        .section-subtitle {
            color: var(--text-light);
            text-align: center;
            margin-bottom: 4rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            font-size: 1.1rem;
        }
        
        /* Portfolio Filter */
        .portfolio-filter {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 3rem;
            gap: 10px;
        }
        
        .filter-btn {
            background: white;
            border: 1px solid #e5e7eb;
            padding: 12px 25px;
            border-radius: 30px;
            font-weight: 500;
            transition: all 0.4s ease;
            color: var(--text-dark);
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }
        
        .filter-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 0;
            height: 100%;
            background: var(--gradient-blue);
            transition: width 0.4s ease;
            z-index: -1;
        }
        
        .filter-btn.active, .filter-btn:hover {
            color: blue;
            border-color: var(--primary-blue);
        }
        
        .filter-btn.active::before, .filter-btn:hover::before {
            width: 100%;
        }
        
        /* Portfolio Grid */
        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 4rem;
        }
        
        .portfolio-item {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.5s ease;
            background: white;
            position: relative;
            opacity: 0;
            transform: translateY(30px);
        }
        
        .portfolio-item.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .portfolio-item:hover {
            transform: translateY(-15px) scale(1.02);
            box-shadow: 0 25px 50px rgba(37, 99, 235, 0.15);
        }
        
        .portfolio-image {
            height: 250px;
            background-color: #e2e8f0;
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }
        
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: all 0.4s ease;
            transform: translateY(20px);
        }
        
        .portfolio-item:hover .portfolio-overlay {
            opacity: 0.9;
            transform: translateY(0);
        }
        
        .portfolio-actions {
            display: flex;
            gap: 15px;
        }
        
        .portfolio-action {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-blue);
            text-decoration: none;
            transition: all 0.3s ease;
            transform: translateY(20px);
            opacity: 0;
            cursor: pointer;
        }
        
        .portfolio-item:hover .portfolio-action {
            transform: translateY(0);
            opacity: 1;
        }
        
        .portfolio-action:nth-child(1) {
            transition-delay: 0.1s;
        }
        
        .portfolio-action:nth-child(2) {
            transition-delay: 0.2s;
        }
        
        .portfolio-action:hover {
            background: var(--primary-blue);
            color: white;
            transform: scale(1.1);
        }
        
        .portfolio-content {
            padding: 1.8rem;
        }
        
        .portfolio-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }
        
        .portfolio-category {
            color: var(--primary-blue);
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 1rem;
            display: inline-block;
            padding: 5px 15px;
            background: #eff6ff;
            border-radius: 20px;
        }
        
        .portfolio-description {
            color: var(--text-light);
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }
        
        .portfolio-tech {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 1.5rem;
        }
        
        .tech-tag {
            background: #f1f5f9;
            color: var(--text-dark);
            padding: 5px 12px;
            border-radius: 15px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        
        .portfolio-link {
            color: var(--primary-blue);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            transition: all 0.3s ease;
        }
        
        .portfolio-link:hover {
            color: var(--dark-blue);
            transform: translateX(5px);
        }
        
        /* Project Details Modal */
        .project-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 1050;
            overflow-y: auto;
            padding: 20px;
        }
        
        .project-modal.active {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .modal-content {
            background: white;
            border-radius: 20px;
            max-width: 1000px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            position: relative;
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
            animation: modalFadeIn 0.5s ease;
        }
        
        @keyframes modalFadeIn {
            from {
                opacity: 0;
                transform: translateY(-50px) scale(0.9);
            }
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }
        
        .modal-close {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-dark);
            font-size: 1.2rem;
            cursor: pointer;
            z-index: 10;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .modal-close:hover {
            background: var(--primary-blue);
            color: white;
            transform: rotate(90deg);
        }
        
        .modal-header {
            padding: 2.5rem 2.5rem 1.5rem;
            border-bottom: 1px solid #e5e7eb;
        }
        
        .modal-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
        }
        
        .modal-category {
            color: var(--primary-blue);
            font-weight: 600;
            font-size: 1rem;
        }
        
        .modal-body {
            padding: 2rem 2.5rem;
        }
        
        .project-image {
            width: 100%;
            height: 400px;
            border-radius: 15px;
            background-color: #e2e8f0;
            background-size: cover;
            background-position: center;
            margin-bottom: 2rem;
        }
        
        .project-details {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        
        .project-info h3, .project-tech h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }
        
        .info-item {
            display: flex;
            justify-content: space-between;
            padding: 0.8rem 0;
            border-bottom: 1px solid #f1f5f9;
        }
        
        .info-label {
            font-weight: 600;
            color: var(--text-dark);
        }
        
        .info-value {
            color: var(--text-light);
        }
        
        .tech-stack {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        
        .tech-item {
            background: var(--gradient-blue);
            color: white;
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 500;
        }
        
        .project-description {
            margin-bottom: 2rem;
        }
        
        .project-description h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }
        
        .project-description p {
            color: var(--text-light);
            line-height: 1.7;
        }
        
        .modal-footer {
            padding: 1.5rem 2.5rem 2.5rem;
            border-top: 1px solid #e5e7eb;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .project-links {
            display: flex;
            gap: 15px;
        }
        
        .project-link {
            background: var(--gradient-blue);
            color: white;
            border: none;
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .project-link:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
        }
        
        .project-link.outline {
            background: white;
            color: var(--primary-blue);
            border: 2px solid var(--primary-blue);
        }
        
        .project-link.outline:hover {
            background: var(--primary-blue);
            color: white;
        }
        
        /* Footer */
        .footer {
            background: var(--text-dark);
            color: white;
            padding: 80px 0 30px;
        }
        
        .footer-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            position: relative;
            display: inline-block;
        }
        
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--primary-blue);
        }
        
        .footer-links {
            list-style: none;
            padding: 0;
        }
        
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        
        .footer-links a {
            color: #d1d5db;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .social-icons {
            display: flex;
            gap: 15px;
            margin-top: 1.5rem;
        }
        
        .social-icon {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            transition: all 0.4s ease;
            text-decoration: none;
        }
        
        .social-icon:hover {
            background: var(--primary-blue);
            transform: translateY(-5px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 3rem;
            margin-top: 3rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #9ca3af;
        }
        
        /* Animations */
        .fade-in-up {
            opacity: 0;
            transform: translateY(40px);
            transition: all 0.8s ease;
        }
        
        .fade-in-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .page-title {
                font-size: 2.5rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .portfolio-grid {
                grid-template-columns: 1fr;
            }
            
            .project-details {
                grid-template-columns: 1fr;
            }
            
            .modal-footer {
                flex-direction: column;
                gap: 15px;
                align-items: flex-start;
            }
            
            .project-links {
                width: 100%;
                justify-content: space-between;
            }
        }