@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

        :root {
            --primary: #5D5CDE;
            --primary-dark: #4a49b7;
            --secondary: #3a3a3a;
            --light: #ffffff;
            --dark: #181818;
            --gray: #f5f5f5;
            --gray-dark: #2a2a2a;
            --transition: all 0.3s ease;
        }

        .dark {
            --primary: #6e6de0;
            --secondary: #e0e0e0;
            --gray: #2a2a2a;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', sans-serif;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--light);
            color: var(--secondary);
            transition: var(--transition);
        }

        body.dark {
            background-color: var(--dark);
            color: var(--light);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }

        /* Header and Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }

        header.dark {
            background-color: rgba(24, 24, 24, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }

        .logo {
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--primary);
        }

        .btn {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            background-color: var(--primary);
            color: white;
            border-radius: 4px;
            font-weight: 500;
            transition: var(--transition);
            cursor: pointer;
            text-align: center;
        }

        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--secondary);
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .dark .mobile-menu-btn {
            color: var(--light);
        }

        /* Hero Section */
        .hero {
            padding-top: 120px;
            padding-bottom: 60px;
            position: relative;
            overflow: hidden;
        }

        .hero h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--secondary);
        }

        .dark .hero h1 {
            color: var(--light);
        }

        .hero h2 {
            font-size: 1.25rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            color: var(--primary);
        }

        .hero-img {
            width: 280px;
            height: 280px;
            border-radius: 50%;
            overflow: hidden;
            border: 4px solid var(--primary);
            position: relative;
        }

        .hero-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hero-img-placeholder {
            width: 100%;
            height: 100%;
            background-color: var(--primary);
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 4rem;
            color: white;
        }

        /* About Section */
        .about {
            padding: 80px 0;
            position: relative;
            background-color: var(--gray);
            transition: var(--transition);
        }

        .dark .about {
            background-color: var(--gray-dark);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 2rem;
            text-align: center;
            color: var(--secondary);
        }

        .dark .section-title {
            color: var(--light);
        }

        .section-title span {
            color: var(--primary);
        }

        /* Skills Section */
        .skills {
            padding: 80px 0;
        }

        .skill-category {
            margin-bottom: 2rem;
        }

        .skill-category h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .skill-item {
            display: inline-block;
            padding: 0.5rem 1rem;
            margin: 0.25rem;
            background-color: var(--gray);
            border-radius: 20px;
            font-weight: 500;
            transition: var(--transition);
        }

        .dark .skill-item {
            background-color: var(--gray-dark);
            color: var(--light);
        }

        .skill-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }

        .dark .skill-item:hover {
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
        }

        /* Projects Section */
        .projects {
            padding: 80px 0;
            background-color: var(--gray);
            transition: var(--transition);
        }

        .dark .projects {
            background-color: var(--gray-dark);
        }

        .project-card {
            background-color: var(--light);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
            height: 100%;
        }

        .dark .project-card {
            background-color: var(--dark);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        }

        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        .dark .project-card:hover {
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
        }

        .project-img {
            height: 200px;
            background-color: var(--primary);
            color: white;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 3rem;
        }

        .project-content {
            padding: 1.5rem;
        }

        .project-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--secondary);
        }

        .dark .project-title {
            color: var(--light);
        }

        .project-tech {
            font-size: 0.85rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        .project-desc {
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .project-links a {
            display: inline-block;
            margin-right: 1rem;
            color: var(--primary);
            font-weight: 500;
            transition: var(--transition);
        }

        .project-links a:hover {
            color: var(--primary-dark);
        }

        /* Certifications Section */
        .certifications {
            padding: 80px 0;
        }

        .cert-item {
            background-color: var(--gray);
            padding: 1rem 1.5rem;
            border-radius: 6px;
            margin-bottom: 1rem;
            transition: var(--transition);
        }

        .dark .cert-item {
            background-color: var(--gray-dark);
        }

        .cert-item:hover {
            transform: translateX(5px);
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }

        .dark .cert-item:hover {
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
        }

        /* Contact Section */
        .contact {
            padding: 80px 0;
            background-color: var(--gray);
            transition: var(--transition);
        }

        .dark .contact {
            background-color: var(--gray-dark);
        }

        .contact-info {
            margin-bottom: 2rem;
        }

        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }

        .contact-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary);
            color: white;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-right: 1rem;
            flex-shrink: 0;
        }

        .contact-text a {
            color: var(--secondary);
            transition: var(--transition);
        }

        .dark .contact-text a {
            color: var(--light);
        }

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

        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 2rem;
        }

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

        .social-link:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* Footer */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 2rem 0;
            text-align: center;
        }

        /* Navigation styles for mobile */
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: var(--light);
                flex-direction: column;
                padding: 2rem;
                transition: var(--transition);
                z-index: 999;
            }

            .dark .nav-links {
                background-color: var(--dark);
            }

            .nav-links.active {
                left: 0;
            }

            .nav-links a {
                margin: 1rem 0;
            }

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

            .hero-content {
                flex-direction: column-reverse;
                text-align: center;
            }

            .hero-img {
                margin-bottom: 2rem;
                width: 220px;
                height: 220px;
            }
        }

        /* Theme toggle switch */
        .theme-switch {
            position: relative;
            width: 50px;
            height: 25px;
            background-color: var(--gray);
            border-radius: 25px;
            cursor: pointer;
            transition: var(--transition);
        }

        .dark .theme-switch {
            background-color: var(--primary);
        }

        .switch-toggle {
            position: absolute;
            top: 2px;
            left: 2px;
            width: 21px;
            height: 21px;
            background-color: var(--primary);
            border-radius: 50%;
            transition: var(--transition);
            display: flex;
            justify-content: center;
            align-items: center;
            color: white;
            font-size: 0.75rem;
        }

        .dark .switch-toggle {
            left: 27px;
            background-color: white;
            color: var(--primary);
        }

        /* Scroll to top button */
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 99;
        }

        .scroll-top.active {
            opacity: 1;
            visibility: visible;
        }

        .scroll-top:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }