:root {
            --primary-color: #4f46e5;
            --secondary-color: #334155;
            --background-color: #f8fafc;
            --surface-color: #ffffff;
            --text-color: #1e293b;
            --light-text-color: #64748b;
            --shadow-color: rgba(0, 0, 0, 0.1);
            --border-radius: 0.75rem;
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            background-color: var(--background-color);
            color: var(--text-color);
            line-height: 1.6;
        }

        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 20px;
        }

        h1, h2, h3 {
            font-weight: 700;
            line-height: 1.2;
        }

        h1 { font-size: 3rem; }
        h2 { font-size: 2.25rem; text-align: center; margin-bottom: 4rem; }
        h3 { font-size: 1.5rem; }

        section {
            padding: 6rem 0;
        }

        .btn {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            background-color: var(--primary-color);
            color: white;
            border-radius: var(--border-radius);
            text-decoration: none;
            font-weight: 600;
            transition: transform 0.3s, background-color 0.3s;
        }

        .btn:hover {
            background-color: #4338ca;
            transform: translateY(-2px);
        }

        /* Header & Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            z-index: 100;
            transition: box-shadow 0.3s;
        }

        .header.scrolled {
            box-shadow: 0 2px 10px var(--shadow-color);
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .nav-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .nav-link {
            text-decoration: none;
            color: var(--secondary-color);
            font-weight: 500;
            transition: color 0.3s;
        }

        .nav-link:hover {
            color: var(--primary-color);
        }

        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--secondary-color);
        }

        /* Hero Section */
        #home {
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 4rem;
        }

        .hero-text {
            flex: 1;
        }
        
        .hero-text .subtitle {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--primary-color);
        }

        .hero-text h1 {
            margin: 0.5rem 0 1.5rem;
        }

        .hero-text p {
            margin-bottom: 2rem;
            color: var(--light-text-color);
            max-width: 500px;
        }
        
        .hero-socials {
            display: flex;
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .hero-socials a {
            color: var(--secondary-color);
            font-size: 1.5rem;
            transition: color 0.3s, transform 0.3s;
        }
        
        .hero-socials a:hover {
            color: var(--primary-color);
            transform: translateY(-3px);
        }

        .hero-image-wrapper {
            flex-shrink: 0;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            overflow: hidden;
            border: 8px solid var(--surface-color);
            box-shadow: 0 10px 30px var(--shadow-color);
        }

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

        /* About Section */
        #about .container {
            max-width: 800px;
            text-align: center;
        }
        
        #about p {
            color: var(--light-text-color);
            font-size: 1.1rem;
        }

        /* Projects Section */
        #projects {
            background-color: #eef2ff;
        }
        
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .project-card {
            background: var(--surface-color);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 4px 20px var(--shadow-color);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .project-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 30px var(--shadow-color);
        }

        .project-card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .project-card-content {
            padding: 1.5rem;
        }

        .project-card-content h3 {
            margin-bottom: 0.5rem;
        }

        .project-card-content p {
            color: var(--light-text-color);
            margin-bottom: 1rem;
        }

        .project-links a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            margin-right: 1.5rem;
        }
        
        .project-links a i {
            margin-right: 0.5rem;
        }

        /* Contact Section */
        .contact-form-wrapper {
            max-width: 700px;
            margin: 0 auto;
            background: var(--surface-color);
            padding: 3rem;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 20px var(--shadow-color);
        }

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

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

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #e2e8f0;
            border-radius: var(--border-radius);
            font-family: 'Poppins', sans-serif;
            font-size: 1rem;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
        }

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

        .submit-btn {
            width: 100%;
            border: none;
            cursor: pointer;
        }

        /* Footer */
        .footer {
            background-color: var(--secondary-color);
            color: #e2e8f0;
            text-align: center;
            padding: 2rem 0;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            h1 { font-size: 2.5rem; }
            h2 { font-size: 1.8rem; margin-bottom: 3rem;}
            section { padding: 4rem 0; }

            .nav-menu {
                position: fixed;
                top: 70px;
                right: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: var(--surface-color);
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 2.5rem;
                transition: right 0.4s ease-in-out;
            }

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

            .nav-toggle {
                display: block;
            }

            .hero-content {
                flex-direction: column-reverse;
                text-align: center;
            }
            
            .hero-text p {
                margin-left: auto;
                margin-right: auto;
            }
            
            .hero-socials {
                justify-content: center;
            }
            
            .hero-image-wrapper {
                width: 250px;
                height: 250px;
            }
        }