:root {
            --primary-color: #1a1a1a;
            --secondary-color: #2d2d2d;
            --accent-color: #007acc;
            --highlight-color: #00a8ff;
            --text-color: #333333;
            --light-bg: #f8f9fa;
            --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --gradient-accent: linear-gradient(135deg, #007acc 0%, #00a8ff 100%);
            --gradient-primary: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            --gradient-secondary: linear-gradient(135deg, #ecf0f1 0%, #bdc3c7 100%);
            --sleek-gradient: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            --modern-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        
        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            scroll-behavior: smooth;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        .hero-section {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
            opacity: 0.3;
        }
        
        .hero-section::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 20% 80%, rgba(0, 122, 204, 0.1) 0%, transparent 50%),
                        radial-gradient(circle at 80% 20%, rgba(0, 168, 255, 0.1) 0%, transparent 50%),
                        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
        }
        
        .hero-content {
            position: relative;
            z-index: 2;
        }
        
        .hero-title {
            font-size: 4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            color: white;
            animation: fadeInUp 1s ease-out;
            letter-spacing: -0.02em;
        }
        
        .hero-subtitle {
            font-size: 1.8rem;
            font-weight: 300;
            margin-bottom: 2rem;
            opacity: 0.95;
            animation: fadeInUp 1s ease-out 0.2s both;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .hero-description {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem;
            opacity: 0.95;
            animation: fadeInUp 1s ease-out 0.4s both;
        }
        
        .hero-buttons {
            margin-top: 2rem;
        }
        
        .btn-hero {
            padding: 15px 35px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 50px;
            margin: 0 15px;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            text-decoration: none;
            display: inline-block;
            position: relative;
            overflow: hidden;
            animation: fadeInUp 1s ease-out 0.6s both;
        }
        
        .btn-hero::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 0.5s;
        }
        
        .btn-hero:hover::before {
            left: 100%;
        }
        
        .btn-hero-primary {
            background: white;
            color: var(--primary-color);
            border: 2px solid white;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        
        .btn-hero-primary:hover {
            background: var(--accent-color);
            color: white;
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 15px 35px rgba(0,122,204,0.3);
        }
        
        .btn-hero-secondary {
            background: transparent;
            color: white;
            border: 2px solid rgba(255,255,255,0.8);
            backdrop-filter: blur(10px);
        }
        
        .btn-hero-secondary:hover {
            background: rgba(255,255,255,0.1);
            color: white;
            transform: translateY(-3px) scale(1.05);
            border-color: white;
            box-shadow: 0 15px 35px rgba(0,0,0,0.2);
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 600;
            text-align: center;
            margin-bottom: 3rem;
            color: var(--primary-color);
        }
        
        .research-card {
            background: white;
            border-radius: 16px;
            padding: 2.5rem;
            text-align: center;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
            height: 100%;
            border: 1px solid #e8e8e8;
            position: relative;
            overflow: hidden;
        }
        
        .research-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent-color);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        
        .research-card:hover::before {
            transform: scaleX(1);
        }
        
        .research-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 40px rgba(0,0,0,0.12);
            border-color: var(--accent-color);
        }
        
        .research-icon {
            font-size: 3rem;
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            transition: all 0.3s ease;
        }
        
        .research-card:hover .research-icon {
            transform: scale(1.1);
            color: var(--highlight-color);
        }
        
        .research-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .research-description {
            color: #666;
            line-height: 1.6;
        }
        
        .stats-section {
            background: var(--light-bg);
            padding: 80px 0;
        }
        
        .stat-card {
            text-align: center;
            padding: 2rem;
        }
        
        .stat-number {
            font-size: 3.5rem;
            font-weight: 700;
            color: var(--accent-color);
            margin-bottom: 0.5rem;
            transition: all 0.3s ease;
        }
        
        .stat-card:hover .stat-number {
            transform: scale(1.05);
            color: var(--highlight-color);
        }
        
        .stat-label {
            font-size: 1.1rem;
            color: #666;
            font-weight: 500;
        }
        
        .publication-preview {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
            border-left: 4px solid var(--accent-color);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .publication-preview::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 122, 204, 0.02);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .publication-preview:hover::before {
            opacity: 1;
        }
        
        .publication-preview:hover {
            transform: translateX(4px) translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 122, 204, 0.15);
        }
        
        .pub-title {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
            font-size: 1.1rem;
        }
        
        .pub-authors {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }
        
        .pub-venue {
            color: var(--secondary-color);
            font-style: italic;
            font-size: 0.9rem;
        }
        
        .pub-year {
            color: var(--accent-color);
            font-weight: 600;
            font-size: 0.9rem;
        }
        
        
        .contact-section {
            background: var(--primary-color);
            color: white;
            padding: 80px 0;
        }
        
        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }
        
        .contact-icon {
            font-size: 1.5rem;
            margin-right: 1rem;
            color: var(--secondary-color);
        }
        
        .contact-text {
            font-size: 1.1rem;
        }
        
        .contact-text a {
            color: white;
            text-decoration: none;
        }
        
        .contact-text a:hover {
            color: var(--secondary-color);
        }
        
        .social-links {
            margin-top: 2rem;
        }
        
        .social-link {
            display: inline-block;
            width: 50px;
            height: 50px;
            background: var(--secondary-color);
            color: white;
            text-align: center;
            line-height: 50px;
            border-radius: 50%;
            margin: 0 10px;
            transition: all 0.3s ease;
            text-decoration: none;
        }
        
        .social-link:hover {
            background: white;
            color: var(--secondary-color);
            transform: translateY(-3px);
        }
        
        .professional-image {
            border-radius: 20px;
            max-width: 100%;
            height: auto;
            box-shadow: 0 8px 32px rgba(0,0,0,0.12), 
                        0 2px 8px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .professional-image:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 48px rgba(0,0,0,0.15), 
                        0 4px 16px rgba(0,0,0,0.1);
        }
        
        .image-container {
            position: relative;
            display: inline-block;
            margin: 2rem 0;
        }
        
        .image-container::before {
            content: '';
            position: absolute;
            top: -20px;
            left: -20px;
            right: -20px;
            bottom: -20px;
            background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            z-index: -2;
            animation: pulse 2s ease-in-out infinite;
        }
        
        @keyframes pulse {
            0%, 100% { transform: scale(1); opacity: 0.7; }
            50% { transform: scale(1.1); opacity: 0.3; }
        }
        
        /* Alternative image styles - you can switch between these */
        .image-modern {
            border-radius: 20px;
            box-shadow: 0 25px 50px rgba(0,0,0,0.15);
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }
        
        .image-modern::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .image-modern:hover::before {
            opacity: 1;
        }
        
        .image-modern:hover {
            transform: scale(1.03) rotate(1deg);
            box-shadow: 0 35px 70px rgba(102, 126, 234, 0.2);
        }
        
        .image-hexagon {
            clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
            transition: all 0.4s ease;
        }
        
        .image-hexagon:hover {
            transform: scale(1.05) rotate(5deg);
            filter: brightness(1.1) contrast(1.1);
        }
        
        .about-section {
            padding: 80px 0;
        }
        
        .about-content {
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .highlight {
            background: var(--accent-color);
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
            color: white;
            text-shadow: 0 1px 2px rgba(0,0,0,0.2);
        }
        
        .section-divider {
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--secondary-color), transparent);
            margin: 60px 0;
        }
        
        /* Enhanced Navigation Styles */
        .navbar {
            background: rgba(26, 26, 46, 0.95) !important;
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
            padding: 0.8rem 1rem;
        }
        
        .navbar.scrolled {
            background: rgba(26, 26, 46, 0.98) !important;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            padding: 0.5rem 0;
        }
        
        .navbar-brand {
            font-size: 1.4rem;
            font-weight: 600;
            color: white;
            transition: all 0.3s ease;
            text-decoration: none;
            padding: 0.5rem 1rem;
            margin-right: 1rem;
        }
        
        .navbar-brand:hover {
            transform: scale(1.02);
            filter: brightness(1.1);
            color: white;
        }
        
        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.9) !important;
            font-weight: 500;
            font-size: 1.1rem;
            padding: 0.75rem 1.2rem !important;
            margin: 0 0.3rem;
            border-radius: 25px;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            position: relative;
            overflow: hidden;
        }
        
        .navbar-nav .nav-link::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
            transition: left 0.5s;
        }
        
        .navbar-nav .nav-link:hover::before {
            left: 100%;
        }
        
        .navbar-nav .nav-link:hover {
            color: white !important;
            background: rgba(0, 122, 204, 0.2);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 122, 204, 0.3);
        }
        
        .navbar-nav .nav-link.active {
            background: var(--accent-color);
            color: white !important;
            box-shadow: 0 8px 25px rgba(0, 122, 204, 0.4);
        }
        
        .navbar-toggler {
            border: none;
            padding: 0.5rem;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
        }
        
        .navbar-toggler:hover {
            background: rgba(0, 122, 204, 0.2);
            transform: scale(1.05);
        }
        
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        
        .navbar-collapse {
            background: rgba(26, 26, 46, 0.95);
            border-radius: 15px;
            margin-top: 1rem;
            padding: 1rem;
            backdrop-filter: blur(20px);
        }
        
        @media (min-width: 768px) {
            .navbar-collapse {
                background: transparent;
                margin-top: 0;
                padding: 0;
            }
        }
        
        /* Container padding fix */
        .container {
            padding-left: 20px;
            padding-right: 20px;
        }
        
        @media (max-width: 768px) {
            .container {
                padding-left: 15px;
                padding-right: 15px;
            }
            
            .navbar {
                padding: 0.6rem 0.8rem;
            }
            
            .navbar-brand {
                font-size: 1.2rem;
                padding: 0.4rem 0.8rem;
                margin-right: 0.5rem;
            }
            
            .navbar-nav .nav-link {
                font-size: 1rem;
                padding: 0.6rem 1rem !important;
                margin: 0 0.2rem;
            }
        }
        
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            
            .hero-subtitle {
                font-size: 1.2rem;
            }
            
            .btn-hero {
                display: block;
                margin: 10px auto;
                max-width: 200px;
            }
        }