:root {
            --primary-color: #1ea840;
            --primary-dark: #178533;
            --text-color: #333;
            --text-light: #666;
            --bg-color: #fff;
            --bg-secondary: #f8f9fa;
            --border-color: #eaeaea;
            --shadow: 0 5px 15px rgba(0,0,0,0.08);
            --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            --card-bg: #fff;
            --header-bg: rgba(255, 255, 255, 0.95);
        }

        .night-mode {
            --primary-color: #2ecc71;
            --primary-dark: #27ae60;
            --text-color: #f0f0f0;
            --text-light: #b0b0b0;
            --bg-color: #121212;
            --bg-secondary: #1e1e1e;
            --border-color: #333;
            --shadow: 0 5px 15px rgba(0,0,0,0.3);
            --card-bg: #1e1e1e;
            --header-bg: rgba(30, 30, 30, 0.95);
        }

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

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

        /* Header Styles */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 5%;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background-color: var(--header-bg);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            z-index: 1000;
            transition: var(--transition);
            backdrop-filter: blur(10px);
        }

        .logo img {
            height: 50px;
            transition: var(--transition);
        }

        .nav-links ul {
            display: flex;
            list-style: none;
        }

        .nav-links li {
            margin-left: 2rem;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-color);
            font-weight: 500;
            position: relative;
            transition: var(--transition);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary-color);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        /* Theme Toggle */
        .theme-toggle {
            background: none;
            border: none;
            color: var(--text-color);
            font-size: 1.2rem;
            cursor: pointer;
            margin-left: 1rem;
            transition: var(--transition);
        }

        .theme-toggle:hover {
            color: var(--primary-color);
            transform: rotate(30deg);
        }

        /* Hamburger Menu */
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
        }

        .hamburger div {
            width: 25px;
            height: 3px;
            background-color: var(--text-color);
            margin: 3px 0;
            transition: var(--transition);
        }

        /* Mobile Navigation */
        .mobile-nav {
            position: fixed;
            top: 0;
            right: -100%;
            width: 70%;
            height: 100vh;
            background-color: var(--bg-color);
            z-index: 1001;
            padding: 2rem;
            transition: var(--transition);
            box-shadow: -5px 0 15px rgba(0,0,0,0.1);
        }

        .mobile-nav.active {
            right: 0;
        }

        .mobile-nav ul {
            list-style: none;
            margin-top: 3rem;
        }

        .mobile-nav li {
            margin-bottom: 1.5rem;
        }

        .mobile-nav a {
            text-decoration: none;
            color: var(--text-color);
            font-size: 1.2rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--primary-color);
        }

        .close-menu {
            position: absolute;
            top: 1rem;
            right: 1rem;
            font-size: 2rem;
            cursor: pointer;
            color: var(--text-color);
            transition: var(--transition);
        }

        .close-menu:hover {
            color: var(--primary-color);
            transform: rotate(90deg);
        }

        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.5);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }

        .overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* Hero Section */
        .projects-hero {
            height: 100vh;
            background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1555041469-a586c61ea9bc?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
            padding: 0 5%;
            position: relative;
            overflow: hidden;
        }

        .hero-content h1 {
            font-size: 4rem;
            margin-bottom: 1.5rem;
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 1s ease-out forwards;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
        }

        .hero-content p {
            font-size: 1.3rem;
            margin-bottom: 2.5rem;
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 1s ease-out 0.3s forwards;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .highlight {
            color: var(--primary-color);
        }

        .cta-button {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 15px 35px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 1s ease-out 0.6s forwards;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            border: 2px solid transparent;
        }

        .cta-button:hover {
            background-color: var(--primary-dark);
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
            border-color: white;
        }

        /* Video Section */
        .video-section {
            position: relative;
            height: 70vh;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .background-video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: -1;
        }

        .video-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 0;
        }

        .video-content {
            text-align: center;
            color: white;
            z-index: 1;
            max-width: 800px;
            padding: 0 5%;
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
        }

        .video-content.animated {
            opacity: 1;
            transform: translateY(0);
        }

        .play-icon {
            font-size: 4rem;
            margin-bottom: 1.5rem;
            transition: var(--transition);
            cursor: pointer;
        }

        .play-icon:hover {
            color: var(--primary-color);
            transform: scale(1.1);
        }

        .video-content h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            text-shadow: 1px 1px 5px rgba(0,0,0,0.5);
        }

        .video-content p {
            font-size: 1.1rem;
            line-height: 1.8;
        }

        /* Category Navigation */
        .category-nav {
            padding: 5rem 5%;
            background-color: var(--bg-secondary);
        }

        .category-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .category-title {
            text-align: center;
            margin-bottom: 3rem;
        }

        .category-title h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
        }

        .category-title p {
            color: var(--text-light);
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
            max-width: 700px;
            margin: 0 auto;
        }

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

        .category-btn {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 12px 20px;
            border-radius: 30px;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            color: var(--text-color);
            opacity: 0;
            transform: translateY(30px);
            box-shadow: var(--shadow);
        }

        .category-btn:hover,
        .category-btn.active {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }

        /* Projects Section */
        .projects-section {
            padding: 5rem 5%;
            background-color: var(--bg-color);
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-title h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
        }

        .section-title p {
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .project-card {
            background-color: var(--card-bg);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            opacity: 0;
            transform: translateY(30px);
            position: relative;
        }

        .project-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }

        .project-image {
            height: 250px;
            overflow: hidden;
            position: relative;
        }

        .project-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .project-info {
            padding: 1.5rem;
        }

        .project-category {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .project-info h3 {
            margin-bottom: 0.5rem;
            font-size: 1.3rem;
        }

        .project-info p {
            color: var(--text-light);
            margin-bottom: 1.5rem;
        }

        .project-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
        }

        .project-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* CTA Section */
        .cta-section {
            padding: 5rem 5%;
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            text-align: center;
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
        }

        .cta-section h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .cta-section p {
            margin-bottom: 2rem;
            font-size: 1.1rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-section .cta-button {
            background-color: white;
            color: var(--primary-color);
        }

        .cta-section .cta-button:hover {
            background-color: rgba(255,255,255,0.9);
            transform: translateY(-5px);
        }

        /* Footer */
        .footer {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            padding: 5rem 5%;
            background-color: var(--bg-secondary);
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
        }

        .footer-column h3 {
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }

        .footer-column a,
        .footer-column p {
            display: block;
            margin-bottom: 0.8rem;
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-column a:hover {
            color: var(--primary-color);
        }

        .social-icons {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .social-icons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            transition: var(--transition);
        }

        .social-icons a:hover {
            background-color: var(--primary-dark);
            transform: translateY(-5px);
        }

        .footer-column form input {
            padding: 12px;
            width: 100%;
            border: none;
            border-radius: 5px;
            margin-bottom: 10px;
            background-color: var(--bg-color);
            color: var(--text-color);
            transition: var(--transition);
        }

        .footer-column form input:focus {
            outline: 2px solid var(--primary-color);
        }

        .footer-column form button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 30px;
            cursor: pointer;
            width: 100%;
            font-weight: 600;
            transition: var(--transition);
        }

        .footer-column form button:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
        }

        .footer-bottom {
            text-align: center;
            padding: 1.5rem;
            background-color: var(--bg-color);
            color: var(--text-light);
            border-top: 1px solid var(--border-color);
        }

        /* Animation Classes */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: var(--transition);
        }

        .animate-on-scroll.animated {
            opacity: 1;
            transform: translateY(0);
        }

        /* Keyframes */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes popUp {
            0% {
                opacity: 0;
                transform: scale(0.8);
            }
            100% {
                opacity: 1;
                transform: scale(1);
            }
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .nav-links {
                display: none;
            }
            
            .hamburger {
                display: flex;
            }
            
            .hero-content h1 {
                font-size: 2.5rem;
            }
            
            .projects-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2rem;
            }
            
            .video-content h2 {
                font-size: 2rem;
            }
            
            .category-btn {
                padding: 10px 15px;
                font-size: 0.9rem;
            }
            
            .footer {
                grid-template-columns: 1fr;
            }
        }