* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        :root {
            --primary-color: #1a73e8;
            --secondary-color: #0d47a1;
            --accent-color: #ff6b35;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gray-color: #6c757d;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        body {
            background-color: #f5f7fa;
            color: var(--dark-color);
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }

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

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

        nav ul li {
            margin-left: 30px;
        }

        nav ul li a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 500;
            transition: var(--transition);
            padding: 5px 0;
            position: relative;
        }

        nav ul li a:hover {
            color: var(--primary-color);
        }

        nav ul li a.active {
            color: var(--primary-color);
        }

        nav ul li a.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--primary-color);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary-color);
            cursor: pointer;
            z-index: 101;
        }

        /* Hero Section */
        .hero {
            padding: 80px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        }

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

        .hero-text {
            flex: 1;
            min-width: 300px;
            padding-right: 30px;
        }

        .hero-image {
            flex: 1;
            min-width: 300px;
            text-align: center;
        }

        .hero-image img {
            width: 300px;
            height: 300px;
            border-radius: 50%;
            object-fit: cover;
            border: 8px solid white;
            box-shadow: var(--shadow);
        }

        .greeting {
            color: var(--primary-color);
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        h1 {
            font-size: 3rem;
            margin-bottom: 10px;
            color: var(--dark-color);
        }

        .title {
            font-size: 1.5rem;
            color: var(--gray-color);
            margin-bottom: 20px;
        }

        .highlight {
            color: var(--accent-color);
            font-weight: 600;
        }

        .btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            margin-top: 20px;
        }

        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }

        /* Main Content */
        .content-section {
            padding: 80px 0;
            display: none;
        }

        .content-section.active {
            display: block;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
            color: var(--dark-color);
            position: relative;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--accent-color);
        }

        /* Home Section */
        .intro-text {
            background-color: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-top: 30px;
        }

        .intro-text p {
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

        .signature {
            text-align: right;
            font-style: italic;
            color: var(--gray-color);
            margin-top: 30px;
        }

        /* Education Section */
        .education-item {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-bottom: 30px;
            border-left: 5px solid var(--primary-color);
        }

        .education-item h3 {
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        .education-duration {
            color: var(--gray-color);
            font-style: italic;
            margin-bottom: 15px;
        }

        /* Skills Section */
        .skills-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }

        .skill-category {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }

        .skill-category h3 {
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }

        .skill-list {
            list-style: none;
        }

        .skill-list li {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        .skill-icon {
            color: var(--accent-color);
            margin-right: 10px;
            font-size: 1.2rem;
        }

        /* Work Experience Section */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--primary-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }

        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
            margin-bottom: 30px;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
        }

        .timeline-content {
            padding: 20px;
            background-color: white;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }

        .timeline-content h3 {
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        .timeline-content .duration {
            color: var(--gray-color);
            font-style: italic;
            margin-bottom: 10px;
        }

        .timeline-item::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background-color: white;
            border: 4px solid var(--primary-color);
            border-radius: 50%;
            top: 15px;
            z-index: 1;
        }

        .timeline-item:nth-child(odd)::after {
            right: -10px;
        }

        .timeline-item:nth-child(even)::after {
            left: -10px;
        }

        /* Contact Section */
        .contact-container {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
        }

        .contact-info {
            flex: 1;
            min-width: 300px;
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }

        .contact-info h3 {
            color: var(--primary-color);
            margin-bottom: 20px;
        }

        .contact-details {
            list-style: none;
        }

        .contact-details li {
            margin-bottom: 20px;
            display: flex;
            align-items: flex-start;
        }

        .contact-icon {
            color: var(--accent-color);
            margin-right: 15px;
            font-size: 1.2rem;
            margin-top: 3px;
        }

        .contact-form {
            flex: 1;
            min-width: 300px;
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
        }

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

        /* Footer */
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 0;
            text-align: center;
        }

        .social-links {
            display: flex;
            justify-content: center;
            margin-bottom: 20px;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            border-radius: 50%;
            margin: 0 10px;
            transition: var(--transition);
            text-decoration: none;
        }

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

        .copyright {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            h1 {
                font-size: 2.5rem;
            }
            
            .timeline::after {
                left: 31px;
            }
            
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            
            .timeline-item:nth-child(even) {
                left: 0;
            }
            
            .timeline-item::after {
                left: 21px;
            }
            
            .timeline-item:nth-child(even)::after {
                left: 21px;
            }
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            
            nav ul {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: white;
                flex-direction: column;
                align-items: center;
                padding: 20px 0;
                box-shadow: var(--shadow);
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                z-index: 99;
                height: auto;
                max-height: 0;
                overflow: hidden;
            }
            
            nav ul.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
                max-height: 400px;
                transition: var(--transition), max-height 0.5s ease;
            }
            
            nav ul li {
                margin: 15px 0;
                width: 100%;
                text-align: center;
            }
            
            nav ul li a {
                display: block;
                padding: 10px 20px;
                width: 100%;
            }
            
            nav ul li a.active::after {
                display: none;
            }
            
            .hero-content {
                flex-direction: column;
                text-align: center;
            }
            
            .hero-text {
                padding-right: 0;
                margin-bottom: 40px;
            }
            
            .hero-image img {
                width: 250px;
                height: 250px;
            }
        }