:root {
            /* Light Theme */
            --bg-primary: #f8f9fa;
            --bg-secondary: #ffffff;
            --text-primary: #212529;
            --text-secondary: #495057;
            --accent: #4361ee;
            --accent-light: #4895ef;
            --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --border-radius: 12px;
        }

        .dark-mode {
            /* Dark Theme */
            --bg-primary: #121212;
            --bg-secondary: #1e1e1e;
            --text-primary: #f8f9fa;
            --text-secondary: #adb5bd;
            --accent: #4cc9f0;
            --accent-light: #4895ef;
            --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            transition: var(--transition);
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
            position: relative;
        }

        .particles-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
        }

        /* Header & Navigation */
        header {
            background-color: var(--bg-secondary);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            padding: 1rem 2rem;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent);
            display: flex;
            align-items: center;
        }

        .logo span {
            color: var(--text-primary);
        }

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

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

        .nav-links a {
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 500;
            position: relative;
            padding: 0.5rem 0;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            transition: width 0.3s ease;
        }

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

        .theme-toggle {
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            margin-left: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 5rem 2rem;
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }

        .hero-content {
            flex: 1;
            padding-right: 2rem;
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }

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

        .hero p {
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 600px;
        }

        .social-links {
            display: flex;
            gap: 1rem;
            margin: 1.5rem 0;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--bg-secondary);
            color: var(--text-primary);
            text-decoration: none;
            font-size: 1.2rem;
            transition: var(--transition);
            box-shadow: var(--card-shadow);
        }

        .social-links a:hover {
            background-color: var(--accent);
            color: white;
            transform: translateY(-3px);
        }

        .hero-image {
            flex: 1;
            position: relative;
            perspective: 1000px;
        }

        .cube-container {
            width: 300px;
            height: 300px;
            margin: 0 auto;
            position: relative;
            transform-style: preserve-3d;
            animation: rotate 20s infinite linear;
        }

        .cube-face {
            position: absolute;
            width: 300px;
            height: 300px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            border: 2px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
            color: white;
            opacity: 0.8;
            box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.2);
        }

        .cube-face:nth-child(1) {
            transform: translateZ(150px);
        }

        .cube-face:nth-child(2) {
            transform: rotateY(180deg) translateZ(150px);
        }

        .cube-face:nth-child(3) {
            transform: rotateY(90deg) translateZ(150px);
        }

        .cube-face:nth-child(4) {
            transform: rotateY(-90deg) translateZ(150px);
        }

        .cube-face:nth-child(5) {
            transform: rotateX(90deg) translateZ(150px);
        }

        .cube-face:nth-child(6) {
            transform: rotateX(-90deg) translateZ(150px);
        }

        /* Sections */
        section {
            padding: 5rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

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

        .section-title h2 {
            font-size: 2.5rem;
            display: inline-block;
            position: relative;
            padding-bottom: 1rem;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--accent);
            border-radius: 2px;
        }

        /* Cards */
        .cards-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .card {
            background-color: var(--bg-secondary);
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
            padding: 2rem;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

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

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            z-index: 2;
        }

        .card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--accent);
        }

        .card h4 {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 0.5rem;
        }

        .date {
            display: inline-block;
            background-color: rgba(67, 97, 238, 0.1);
            color: var(--accent);
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .skills {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1rem;
        }

        .skill {
            background-color: rgba(67, 97, 238, 0.1);
            color: var(--accent);
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.9rem;
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .project-card {
            background-color: var(--bg-secondary);
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: var(--transition);
            position: relative;
        }

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

        .project-image {
            height: 200px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            position: relative;
            overflow: hidden;
        }

        .project-content {
            padding: 1.5rem;
        }

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

        .project-content p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
            min-height: 60px;
        }

        .btn {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: white;
            padding: 0.8rem 1.5rem;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
        }

        /* Contact Form */
        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }

        .contact-icon {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .contact-text h4 {
            margin-bottom: 0.3rem;
        }

        .contact-text p,
        .contact-text a {
            color: var(--text-secondary);
            text-decoration: none;
        }

        .contact-text a:hover {
            color: var(--accent);
        }

        .contact-form {
            background-color: var(--bg-secondary);
            border-radius: var(--border-radius);
            box-shadow: var(--card-shadow);
            padding: 2rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            background-color: var(--bg-primary);
            border: 1px solid rgba(0, 0, 0, 0.1);
            border-radius: 8px;
            color: var(--text-primary);
            font-family: inherit;
            font-size: 1rem;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }

        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }

        /* Footer */
        footer {
            background-color: var(--bg-secondary);
            padding: 3rem 2rem;
            text-align: center;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-logo {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 1rem;
        }

        .copyright {
            color: var(--text-secondary);
            margin-top: 2rem;
        }

        /* Animations */
        @keyframes rotate {
            0% {
                transform: rotateX(0) rotateY(0) rotateZ(0);
            }

            100% {
                transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg);
            }
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hero {
                flex-direction: column;
                text-align: center;
            }

            .hero-content {
                padding-right: 0;
                margin-bottom: 3rem;
            }

            .social-links {
                justify-content: center;
            }

            .contact-container {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hero h1 {
                font-size: 2.5rem;
            }

            .mobile-menu-btn {
                display: block;
            }
        }