/* ========== CSS Variables for Theme ========== */
    :root {
        --primary-color: #3b82f6;
        --secondary-color: #60a5fa;
        --accent-color: #8b5cf6;
        --bg-color: #0a0a0a;
        --bg-secondary: #171717;
        --bg-tertiary: #1f1f1f;
        --text-color: #f5f5f5;
        --text-secondary: #a3a3a3;
        --card-bg: #171717;
        --shadow: rgba(0, 0, 0, 0.5);
        --border-color: #262626;
        --glow: rgba(59, 130, 246, 0.3);
        --nav-bg-rgb: 10, 10, 10;
    }

    [data-theme="light"] {
        --primary-color: #2563eb;
        --secondary-color: #1e40af;
        --accent-color: #7c3aed;
        --bg-color: #ffffff;
        --bg-secondary: #f9fafb;
        --bg-tertiary: #f3f4f6;
        --text-color: #1f2937;
        --text-secondary: #6b7280;
        --card-bg: #ffffff;
        --shadow: rgba(0, 0, 0, 0.1);
        --border-color: #e5e7eb;
        --glow: rgba(37, 99, 235, 0.2);
        --nav-bg-rgb: 255, 255, 255;
    }

    /* ========== Global Styles ========== */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        background-color: var(--bg-color);
        color: var(--text-color);
        line-height: 1.6;
        transition: background-color 0.3s ease, color 0.3s ease;
    }

    html {
        scroll-behavior: smooth;
    }

    /* ========== Navigation Bar ========== */
    nav {
        position: fixed;
        top: 0;
        width: 100%;
        background-color: rgba(var(--nav-bg-rgb), 0.8);
        backdrop-filter: blur(10px);
        box-shadow: 0 2px 20px var(--shadow);
        border-bottom: 1px solid var(--border-color);
        z-index: 1000;
        transition: all 0.3s ease;
    }

    .nav-container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 1rem 2rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .logo {
        font-size: 1.8rem;
        font-weight: 800;
        background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        cursor: pointer;
        letter-spacing: 2px;
        transition: transform 0.3s ease;
    }

    .logo:hover {
        transform: scale(1.1);
    }

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

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

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

    .theme-toggle {
        background: none;
        border: 2px solid var(--border-color);
        border-radius: 50%;
        width: 40px;
        height: 40px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        transition: all 0.3s ease;
    }

    .theme-toggle:hover {
        border-color: var(--primary-color);
        transform: rotate(20deg);
    }

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

    /* ========== Hero Section ========== */
    .hero {
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 6rem 2rem 2rem;
        background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-secondary) 50%, var(--bg-color) 100%);
        position: relative;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
        pointer-events: none;
        animation: pulse 4s ease-in-out infinite;
    }

    @keyframes pulse {
        0%, 100% { opacity: 0.5; }
        50% { opacity: 0.8; }
    }

    .hero-content {
        max-width: 1200px;
        display: flex;
        align-items: center;
        gap: 4rem;
        flex-wrap: wrap;
        position: relative;
        z-index: 1;
    }

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

    .hero-text h1 {
        font-size: 3rem;
        margin-bottom: 1rem;
        color: var(--text-color);
    }

    .hero-text h2 {
        font-size: 1.5rem;
        color: var(--primary-color);
        margin-bottom: 1.5rem;
        font-weight: 400;
    }

    .hero-text p {
        font-size: 1.1rem;
        color: var(--text-secondary);
        margin-bottom: 2rem;
    }

    .hero-buttons {
        display: flex;
        gap: 1rem;
        flex-wrap: wrap;
    }

    .btn {
        padding: 0.8rem 2rem;
        border-radius: 8px;
        text-decoration: none;
        font-weight: 600;
        transition: all 0.3s ease;
        display: inline-block;
    }

    .btn-primary {
        background-color: var(--primary-color);
        color: white;
        box-shadow: 0 4px 15px var(--glow);
    }

    .btn-primary:hover {
        background-color: var(--secondary-color);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px var(--glow);
    }

    .btn-secondary {
        border: 2px solid var(--primary-color);
        color: var(--primary-color);
        background-color: transparent;
    }

    .btn-secondary:hover {
        background-color: var(--primary-color);
        color: white;
    }

    .hero-image {
        flex: 1;
        min-width: 300px;
        display: flex;
        justify-content: center;
    }

    .profile-img {
        width: 350px;
        height: 350px;
        border-radius: 50%;
        object-fit: cover;
        border: 5px solid var(--primary-color);
        box-shadow: 0 10px 30px var(--shadow);
        background-color: var(--bg-secondary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 6rem;
        color: var(--primary-color);
    }

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

    .social-link {
        width: 45px;
        height: 45px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: var(--bg-secondary);
        color: var(--text-color);
        text-decoration: none;
        font-size: 1.3rem;
        transition: all 0.3s ease;
    }

    .social-link:hover {
        background-color: var(--primary-color);
        color: white;
        transform: translateY(-3px);
    }

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

    .section-title {
        font-size: 2.5rem;
        text-align: center;
        margin-bottom: 3rem;
        position: relative;
        padding-bottom: 1rem;
        background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .section-title::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 100px;
        height: 4px;
        background-color: var(--primary-color);
        border-radius: 2px;
    }

    /* ========== About Section ========== */
    .about-content {
        max-width: 800px;
        margin: 0 auto;
        text-align: center;
    }

    .about-content p {
        font-size: 1.1rem;
        color: var(--text-secondary);
        line-height: 1.8;
    }

    /* ========== Skills Section ========== */
    .skills-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }

    .skill-category {
        background-color: var(--bg-tertiary);
        padding: 2rem;
        border-radius: 12px;
        box-shadow: 0 4px 15px var(--shadow);
        border: 1px solid var(--border-color);
        transition: all 0.3s ease;
    }

    .skill-category:hover {
        transform: translateY(-5px);
        border-color: var(--primary-color);
        box-shadow: 0 8px 30px var(--glow);
    }

    .skill-category h3 {
        color: var(--primary-color);
        margin-bottom: 1.5rem;
        font-size: 1.4rem;
    }

    .skill-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 0.8rem;
    }

    .skill-tag {
        background-color: var(--bg-secondary);
        padding: 0.5rem 1rem;
        border-radius: 20px;
        font-size: 0.9rem;
        color: var(--text-color);
        border: 1px solid var(--border-color);
        transition: all 0.3s ease;
    }

    .skill-tag:hover {
        background-color: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
        transform: translateY(-2px);
    }

    /* ========== Experience & Education ========== */
    .timeline {
        position: relative;
        padding-left: 2rem;
    }

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

    .timeline-item {
        position: relative;
        margin-bottom: 3rem;
        background-color: var(--bg-tertiary);
        padding: 2rem;
        border-radius: 12px;
        box-shadow: 0 4px 15px var(--shadow);
        border: 1px solid var(--border-color);
        transition: all 0.3s ease;
    }

    .timeline-item:hover {
        border-color: var(--primary-color);
        box-shadow: 0 8px 30px var(--glow);
    }

    .timeline-item::before {
        content: '';
        position: absolute;
        left: -2.6rem;
        top: 2rem;
        width: 15px;
        height: 15px;
        border-radius: 50%;
        background-color: var(--primary-color);
        border: 3px solid var(--bg-color);
    }

    .timeline-item h3 {
        color: var(--primary-color);
        margin-bottom: 0.5rem;
        font-size: 1.4rem;
    }

    .timeline-item h4 {
        color: var(--text-secondary);
        margin-bottom: 0.5rem;
        font-weight: 500;
    }

    .timeline-date {
        color: var(--text-secondary);
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }

    .timeline-item p {
        color: var(--text-secondary);
        line-height: 1.6;
    }

    /* ========== Projects Section ========== */
    .projects-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 2rem;
    }

    .project-card {
        background-color: var(--bg-tertiary);
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 4px 15px var(--shadow);
        transition: all 0.3s ease;
        border: 1px solid var(--border-color);
    }

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

    .project-image-container {
        width: 100%;
        position: relative;
        overflow: hidden;
        background: var(--bg-secondary);
    }

    .project-image {
        width: 100%;
        height: auto;
        display: block;
        transition: transform 0.3s ease;
    }

    .project-card:hover .project-image {
        transform: scale(1.03);
    }

    .project-body {
        padding: 2rem;
    }

    .project-body h3 {
        font-size: 1.5rem;
        color: var(--text-color);
        margin-bottom: 1rem;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .project-body p {
        color: var(--text-secondary);
        margin-bottom: 1.5rem;
        line-height: 1.6;
    }

    .project-tech {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-bottom: 1.5rem;
    }

    .tech-badge {
        background-color: var(--bg-secondary);
        padding: 0.4rem 1rem;
        border-radius: 20px;
        font-size: 0.85rem;
        color: var(--primary-color);
        border: 1px solid var(--border-color);
        font-weight: 500;
        transition: all 0.3s ease;
    }

    .tech-badge:hover {
        background-color: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
        transform: translateY(-2px);
    }

    .project-links {
        display: flex;
        gap: 1rem;
    }

    .project-link {
        flex: 1;
        text-align: center;
        padding: 0.7rem;
        border-radius: 8px;
        text-decoration: none;
        font-weight: 600;
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
    }

    .link-github {
        background-color: var(--bg-secondary);
        color: var(--text-color);
        border: 2px solid var(--border-color);
    }

    .link-github:hover {
        border-color: var(--primary-color);
        color: var(--primary-color);
        transform: translateY(-2px);
    }

    /* ========== Achievements Section with Auto Carousel ========== */
    .achievements-container {
        display: flex;
        flex-direction: column;
        gap: 3rem;
    }

    .achievement-card {
        background-color: var(--bg-tertiary);
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 4px 15px var(--shadow);
        border: 1px solid var(--border-color);
        border-top: 4px solid var(--primary-color);
        transition: all 0.3s ease;
    }

    .achievement-card:hover {
        border-color: var(--primary-color);
        box-shadow: 0 8px 30px var(--glow);
    }

    .carousel-container {
        position: relative;
        width: 100%;
        height: 0;
        padding-bottom: 56.25%;
        overflow: hidden;
        background-color: var(--bg-secondary);
    }

    .carousel-track {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: flex;
        transition: transform 0.5s ease-in-out;
    }

    .carousel-slide {
        min-width: 100%;
        height: 100%;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: var(--bg-secondary);
    }

    .carousel-slide img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center;
        cursor: pointer;
    }

    .carousel-controls {
        position: absolute;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        display: flex;
        gap: 10px;
        z-index: 10;
    }

    .carousel-dot {
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background-color: rgba(255, 255, 255, 0.5);
        cursor: pointer;
        transition: all 0.3s ease;
    }

    .carousel-dot.active {
        background-color: var(--primary-color);
        transform: scale(1.3);
    }

    .carousel-nav {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        background-color: rgba(0, 0, 0, 0.5);
        color: white;
        border: none;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        cursor: pointer;
        font-size: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
        z-index: 10;
    }

    .carousel-nav:hover {
        background-color: var(--primary-color);
        transform: translateY(-50%) scale(1.1);
    }

    .carousel-prev {
        left: 15px;
    }

    .carousel-next {
        right: 15px;
    }

    .carousel-play-pause {
        position: absolute;
        top: 15px;
        right: 15px;
        background-color: rgba(0, 0, 0, 0.5);
        color: white;
        border: none;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        cursor: pointer;
        font-size: 18px;
        z-index: 10;
        transition: all 0.3s ease;
    }

    .carousel-play-pause:hover {
        background-color: var(--primary-color);
    }

    .carousel-counter {
        position: absolute;
        top: 15px;
        left: 15px;
        background-color: rgba(0, 0, 0, 0.6);
        color: white;
        padding: 8px 15px;
        border-radius: 20px;
        font-size: 14px;
        font-weight: 600;
        z-index: 10;
    }

    .achievement-content {
        padding: 2rem;
    }

    .achievement-content h3 {
        color: var(--primary-color);
        margin-bottom: 0.5rem;
        font-size: 1.4rem;
    }

    .achievement-content h4 {
        color: var(--text-secondary);
        font-size: 1rem;
        margin-bottom: 1rem;
        font-weight: 500;
    }

    .achievement-date {
        color: var(--text-secondary);
        font-size: 0.9rem;
        margin-bottom: 1rem;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .achievement-content p {
        color: var(--text-secondary);
        line-height: 1.6;
        margin-bottom: 1rem;
    }

    .achievement-badges {
        display: flex;
        flex-wrap: wrap;
        gap: 0.6rem;
        margin-top: 1rem;
    }

    .achievement-badge {
        background-color: var(--bg-secondary);
        padding: 0.4rem 1rem;
        border-radius: 20px;
        font-size: 0.85rem;
        color: var(--primary-color);
        border: 1px solid var(--border-color);
        font-weight: 600;
        transition: all 0.3s ease;
    }

    .achievement-badge:hover {
        background-color: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
        transform: translateY(-2px);
    }

    /* ========== Image Modal/Lightbox ========== */
    .modal {
        display: none;
        position: fixed;
        z-index: 9999;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.95);
        animation: fadeIn 0.3s ease;
    }

    .modal.active {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .modal-content {
        max-width: 90%;
        max-height: 90%;
        object-fit: contain;
        animation: zoomIn 0.3s ease;
        border-radius: 8px;
    }

    .modal-close {
        position: absolute;
        top: 20px;
        right: 40px;
        color: white;
        font-size: 40px;
        font-weight: bold;
        cursor: pointer;
        transition: color 0.3s ease;
        z-index: 10000;
    }

    .modal-close:hover {
        color: var(--primary-color);
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    @keyframes zoomIn {
        from { transform: scale(0.8); }
        to { transform: scale(1); }
    }

    /* ========== Contact Section ========== */
    .contact-content {
        max-width: 700px;
        margin: 0 auto;
        text-align: center;
    }

    .contact-content > p {
        font-size: 1.2rem;
        color: var(--text-secondary);
        margin-bottom: 3rem;
        line-height: 1.8;
    }

    /* Contact Info Cards - Fully Clickable */
    .contact-info {
        display: flex;
        flex-direction: column;
        gap: 1.2rem;
        margin-bottom: 3rem;
    }

    .contact-item {
        display: flex;
        align-items: center;
        gap: 1.5rem;
        padding: 1.8rem;
        background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
        border: 1px solid var(--border-color);
        border-radius: 14px;
        transition: all 0.3s ease;
        text-decoration: none;
        cursor: pointer;
        position: relative;
        overflow: hidden;
    }

    .contact-item::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
        opacity: 0.1;
        transition: left 0.3s ease;
        z-index: 0;
    }

    .contact-item:hover::before {
        left: 0;
    }

    .contact-item:hover {
        border-color: var(--primary-color);
        box-shadow: 0 10px 30px var(--glow);
        transform: translateY(-6px);
    }

    .contact-icon {
        width: 60px;
        height: 60px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        flex-shrink: 0;
        z-index: 1;
    }

    .contact-text {
        text-align: left;
        flex: 1;
        z-index: 1;
    }

    .contact-label {
        font-size: 0.85rem;
        color: var(--text-secondary);
        margin-bottom: 0.5rem;
        text-transform: uppercase;
        letter-spacing: 1px;
        font-weight: 700;
    }

    .contact-item .contact-value {
        font-size: 1.15rem;
        color: var(--text-color);
        font-weight: 600;
        margin: 0;
    }

    .contact-arrow {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: 10px;
        background-color: rgba(59, 130, 246, 0.15);
        color: var(--primary-color);
        flex-shrink: 0;
        transition: all 0.3s ease;
        z-index: 1;
    }

    .contact-item:hover .contact-arrow {
        background-color: var(--primary-color);
        color: white;
        transform: translateX(4px);
    }

    /* Contact Buttons */
    .contact-buttons {
        display: flex;
        gap: 1rem;
        justify-content: center;
        flex-wrap: wrap;
    }

    .contact-buttons .btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.7rem;
        padding: 0.9rem 1.8rem;
        font-size: 1rem;
    }

    .contact-buttons .btn svg {
        width: 18px;
        height: 18px;
    }

    .contact-buttons .btn-primary,
    .contact-buttons .btn-secondary {
        background-color: transparent;
        color: var(--primary-color);
        border: 2px solid var(--primary-color);
    }

    .contact-buttons .btn-primary:hover,
    .contact-buttons .btn-secondary:hover {
        background-color: var(--primary-color);
        color: white;
        transform: translateY(-2px);
        box-shadow: 0 6px 20px var(--glow);
    }

    .contact-buttons .btn:focus,
    .contact-buttons .btn:active {
        outline: none;
    }

    /* ========== Footer ========== */
    footer {
        background: linear-gradient(180deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
        padding: 2rem;
        text-align: center;
        color: var(--text-secondary);
        border-top: 1px solid var(--border-color);
    }

    footer p {
        margin-bottom: 1rem;
    }

    /* ========== Custom Scrollbar ========== */
    ::-webkit-scrollbar {
        width: 10px;
    }

    ::-webkit-scrollbar-track {
        background: var(--bg-color);
    }

    ::-webkit-scrollbar-thumb {
        background: var(--primary-color);
        border-radius: 5px;
    }

    ::-webkit-scrollbar-thumb:hover {
        background: var(--secondary-color);
    }

    /* ========== Responsive Design ========== */
    @media (max-width: 768px) {
        .nav-menu {
            position: fixed;
            top: 70px;
            left: -100%;
            flex-direction: column;
            background-color: var(--bg-color);
            width: 100%;
            padding: 2rem;
            box-shadow: 0 4px 10px var(--shadow);
            transition: left 0.3s ease;
        }

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

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

        .hero-text h1 {
            font-size: 2rem;
        }

        .hero-text h2 {
            font-size: 1.2rem;
        }

        .profile-img {
            width: 250px;
            height: 250px;
            font-size: 4rem;
        }

        .section-title {
            font-size: 2rem;
        }

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

        .projects-grid {
            grid-template-columns: 1fr;
        }

        .project-image {
            max-height: 400px;
            object-fit: contain;
        }

        .carousel-container {
            padding-bottom: 75%;
        }

        .carousel-nav {
            width: 40px;
            height: 40px;
            font-size: 18px;
        }

        .carousel-play-pause {
            width: 35px;
            height: 35px;
            font-size: 16px;
        }

        .contact-item {
            flex-direction: row;
            padding: 1.4rem;
            gap: 1rem;
        }

        .contact-text {
            text-align: left;
        }

        .contact-label {
            font-size: 0.75rem;
        }

        .contact-item .contact-value {
            font-size: 1rem;
        }

        .contact-icon {
            width: 50px;
            height: 50px;
        }

        .contact-arrow {
            width: 35px;
            height: 35px;
        }

        .contact-buttons {
            flex-direction: column;
            gap: 0.8rem;
        }

        .contact-buttons .btn {
            width: 100%;
        }
    }