/* ============================================
           CSS CUSTOM PROPERTIES - DESIGN SYSTEM
           ============================================ */
        :root {
            /* Light mode colors */
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --primary-light: rgba(37, 99, 235, 0.1);
            --secondary: #1e293b;
            --accent: #10b981;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --border: #e2e8f0;
            --surface: #ffffff;
            --surface-alt: #f8fafc;
            --body-bg: #ffffff;
            
            /* Dark mode colors */
            --primary-dark: #3b82f6;
            --secondary-dark: #f1f5f9;
            --text-dark: #e2e8f0;
            --text-light-dark: #94a3b8;
            --border-dark: #334155;
            --surface-dark: #0f172a;
            --surface-alt-dark: #1e293b;
            --body-bg-dark: #0a0a0f;
            
            /* Spacing scale */
            --space-xs: 0.25rem;
            --space-sm: 0.5rem;
            --space-md: 1rem;
            --space-lg: 1.5rem;
            --space-xl: 2rem;
            --space-2xl: 3rem;
            --space-3xl: 4rem;
            --space-4xl: 5rem;
            
            /* Shadow scale */
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
            --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.3);
            --shadow-glow-accent: 0 0 20px rgba(16, 185, 129, 0.3);
            
            /* Border radius */
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            
            /* Transitions */
            --transition-fast: 150ms ease;
            --transition-normal: 250ms ease;
            --transition-slow: 350ms ease;
            
            /* Layout */
            --max-width: 1200px;
            --header-height: auto;
        }
        
        /* Apply dark mode */
        @media (prefers-color-scheme: dark) {
            :root {
                --primary: var(--primary-dark);
                --secondary: var(--secondary-dark);
                --text: var(--text-dark);
                --text-light: var(--text-light-dark);
                --border: var(--border-dark);
                --surface: var(--surface-dark);
                --surface-alt: var(--surface-alt-dark);
                --body-bg: var(--body-bg-dark);
                
                /* Enhanced shadows for dark mode */
                --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
                --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
                --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
                --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
                --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.4);
                --shadow-glow-accent: 0 0 30px rgba(16, 185, 129, 0.4);
            }
        }
        
        /* Reduced motion preference */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }
        
        html {
            font-size: 16px;
            scroll-behavior: smooth;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
            line-height: 1.7;
            color: var(--text);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: var(--space-lg);
            background-color: var(--body-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        /* Keyboard navigation focus indicators */
        a:focus,
        button:focus {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }
        
        a:focus:not(:focus-visible),
        button:focus:not(:focus-visible) {
            outline: none;
        }
        
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }
        
        @media (prefers-color-scheme: dark) {
            html {
                color-scheme: dark;
            }
        }
        
        .container {
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        
        /* ============================================
           ANIMATIONS
           ============================================ */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }
        
        .animate-fade-in {
            animation: fadeIn var(--transition-normal) ease forwards;
        }
        
        .animate-fade-in-up {
            animation: fadeInUp var(--transition-slow) ease forwards;
        }
        
        /* Staggered animation delays */
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }
        .delay-5 { animation-delay: 0.5s; }
        
        /* ============================================
           HEADER & PROFILE
           ============================================ */
        .header {
            text-align: center;
            margin-bottom: var(--space-2xl);
            padding: var(--space-xl) 0;
            border-bottom: 1px solid var(--border);
            position: relative;
            animation: fadeInUp var(--transition-slow) ease;
        }
        
        .profile-section {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin-bottom: var(--space-xl);
        }
        
        @media (min-width: 768px) {
            .profile-section {
                flex-direction: row;
                justify-content: center;
                text-align: left;
                gap: var(--space-xl);
            }
        }
        
        .profile-img {
            width: 150px;
            height: 150px;
            border-radius: var(--radius-full);
            border: 4px solid var(--primary);
            box-shadow: var(--shadow-glow);
            margin-bottom: var(--space-lg);
            background-color: var(--surface-alt);
            overflow: hidden;
            transition: transform var(--transition-normal), box-shadow var(--transition-normal);
            flex-shrink: 0;
        }
        
        .profile-img:hover {
            transform: scale(1.05);
            box-shadow: var(--shadow-xl), var(--shadow-glow);
        }
        
        .profile-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        
        @media (min-width: 768px) {
            .profile-img {
                margin-bottom: 0;
            }
        }
        
        .profile-info {
            flex: 1;
        }
        
        h1 {
            font-size: 2.75rem;
            font-weight: 800;
            margin-bottom: var(--space-sm);
            color: var(--secondary);
            letter-spacing: -0.02em;
        }
        
        .title {
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-light);
            margin-bottom: var(--space-sm);
            display: block;
            line-height: 1.5;
        }
        
        .experience-years {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-block;
            background: var(--primary-light);
            padding: var(--space-xs) var(--space-md);
            border-radius: var(--radius-full);
        }
        
        .contact-row {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            flex-wrap: wrap;
            margin-bottom: var(--space-md);
        }
        
        .contact-info {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            margin-bottom: var(--space-md);
            justify-content: center;
        }
        
        @media (min-width: 768px) {
            .contact-info {
                justify-content: flex-start;
            }
        }
        
        .contact-item {
            display: inline-flex;
            align-items: center;
            color: var(--text-light);
            text-decoration: none;
            transition: color var(--transition-fast);
            font-size: 0.95rem;
        }
        
        .contact-item:hover {
            color: var(--primary);
        }
        
        .contact-item:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        
        .contact-item i {
            margin-right: var(--space-sm);
            color: var(--primary);
            width: 18px;
            text-align: center;
        }
        
        .contact-item.location {
            font-size: 0.9rem;
        }
        
        .social-links {
            margin-top: var(--space-md);
            display: flex;
            gap: var(--space-md);
            justify-content: center;
        }
        
        @media (min-width: 768px) {
            .social-links {
                justify-content: flex-start;
            }
        }
        
        .social-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-full);
            background-color: var(--surface-alt);
            color: var(--primary);
            font-size: 1.2rem;
            transition: all var(--transition-normal);
            border: 1px solid var(--border);
        }
        
        .social-link:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
        }
        
        .social-link:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        
        /* ============================================
           HERO SECTION
           ============================================ */
        .hero-section {
            background: linear-gradient(135deg, var(--surface-alt) 0%, var(--surface) 50%, var(--surface-alt) 100%);
            padding: var(--space-2xl);
            border-radius: var(--radius-lg);
            margin-top: var(--space-xl);
            margin-bottom: var(--space-2xl);
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border);
            animation: fadeInUp var(--transition-slow) ease;
            animation-delay: 0.1s;
            animation-fill-mode: both;
        }
        
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        
        .hero-section::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        
        .hero-section > * {
            position: relative;
            z-index: 1;
        }
        
        .hero-section h2 {
            font-size: 1.75rem;
            color: var(--secondary);
            margin-bottom: var(--space-md);
        }
        
        .hero-section p {
            font-size: 1.05rem;
            margin-bottom: var(--space-md);
            color: var(--text);
            line-height: 1.8;
        }
        
        .core-expertise {
            margin-top: var(--space-lg);
        }
        
        .core-expertise h3 {
            font-size: 1.1rem;
            color: var(--secondary);
            margin-bottom: var(--space-md);
        }
        
        .expertise-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
        }
        
        .expertise-tag {
            background: linear-gradient(135deg, var(--primary), var(--primary-hover));
            color: white;
            padding: var(--space-sm) var(--space-md);
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }
        
        .expertise-tag:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        
        .cv-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: var(--space-md);
            margin-top: var(--space-xl);
        }
        
        .cv-link {
            display: inline-flex;
            align-items: center;
            background-color: var(--surface);
            color: var(--primary);
            padding: var(--space-sm) var(--space-lg);
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 600;
            border: 2px solid var(--primary);
            transition: all var(--transition-normal);
        }
        
        .cv-link i {
            margin-right: var(--space-sm);
        }
        
        .cv-link:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        
        .cv-link:active {
            transform: scale(0.98);
        }
        
        /* ============================================
           MAIN CONTENT & SECTIONS
           ============================================ */
        .main-content {
            flex: 1;
        }
        
        section {
            margin-bottom: var(--space-4xl);
            animation: fadeInUp var(--transition-slow) ease;
            animation-fill-mode: both;
        }
        
        section:last-child {
            margin-bottom: var(--space-2xl);
        }
        
        #skills { animation-delay: 0.1s; }
        #tech-skills { animation-delay: 0.15s; }
        #experience { animation-delay: 0.2s; }
        #testimonials { animation-delay: 0.25s; }
        #certifications { animation-delay: 0.3s; }
        #education { animation-delay: 0.35s; }
        #languages { animation-delay: 0.4s; }
        #hire-me { animation-delay: 0.45s; }
        
        h2 {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: var(--space-xl);
            margin-top: 0;
            padding-bottom: var(--space-md);
            border-bottom: 2px solid var(--border);
            position: relative;
            letter-spacing: -0.01em;
        }
        
        h2::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: var(--radius-full);
        }
        
        h3 {
            font-size: 1.35rem;
            color: var(--primary);
            margin-top: var(--space-lg);
            margin-bottom: var(--space-md);
        }
        
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-top: var(--space-md);
            margin-bottom: var(--space-sm);
            color: var(--secondary);
        }
        
        p {
            margin-bottom: var(--space-md);
            color: var(--text);
        }
        
        ul {
            padding-left: var(--space-lg);
            margin-bottom: var(--space-md);
        }
        
        li {
            margin-bottom: var(--space-sm);
            color: var(--text);
        }
        
        /* ============================================
           SKILLS GRID - NEW MODERN LAYOUT
           ============================================ */
        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: var(--space-lg);
        }
        
        .skill-category-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-sm);
        }
        
        .skill-category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        
        .skill-category-header {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            margin-bottom: var(--space-md);
            padding-bottom: var(--space-md);
            border-bottom: 1px solid var(--border);
        }
        
        .skill-category-header i {
            font-size: 1.5rem;
            color: var(--primary);
            width: 32px;
            text-align: center;
        }
        
        .skill-category-header h3 {
            margin: 0;
            font-size: 1.1rem;
            color: var(--secondary);
        }
        
        .skill-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
        }
        
        .skill-tag {
            background-color: var(--surface-alt);
            padding: var(--space-xs) var(--space-md);
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            color: var(--text);
            font-weight: 500;
            border: 1px solid var(--border);
            transition: all var(--transition-fast);
        }
        
        .skill-tag:hover {
            background-color: var(--primary);
            color: white;
            border-color: var(--primary);
            transform: translateY(-1px);
        }
        
        /* ============================================
           SERVICES SECTION
           ============================================ */
        .expertise-container {
            display: grid;
            grid-template-columns: 1fr;
            gap: var(--space-xl);
            margin: var(--space-lg) 0;
        }
        
        .expertise-intro {
            font-size: 1.1rem;
            color: var(--secondary);
            line-height: 1.7;
            margin-bottom: var(--space-lg);
        }
        
        .value-props {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--space-lg);
            margin-bottom: var(--space-xl);
        }
        
        .value-prop {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            text-align: center;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
            transition: all var(--transition-normal);
        }
        
        .value-prop:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
        }
        
        .value-prop i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: var(--space-md);
        }
        
        .value-prop h4 {
            margin: var(--space-sm) 0;
            color: var(--secondary);
            font-size: 1.2rem;
        }
        
        .value-prop p {
            color: var(--text-light);
            margin: 0;
            font-size: 0.95rem;
        }
        
        .services-offered {
            margin-top: var(--space-3xl);
        }
        
        .services-offered h2 {
            text-align: center;
            margin-bottom: var(--space-md);
        }
        
        .services-intro {
            text-align: center;
            color: var(--text-light);
            margin-bottom: var(--space-2xl);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            font-size: 1.05rem;
            line-height: 1.7;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--space-xl);
        }
        
        .service-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
        }
        
        .service-card:hover {
            transform: translateY(-6px) scale(1.02);
            box-shadow: var(--shadow-xl), var(--shadow-glow);
            border-color: var(--primary);
        }
        
        .service-card:active {
            transform: scale(0.98);
        }
        
        .service-icon {
            width: 70px;
            height: 70px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, var(--primary-light) 0%, rgba(37, 99, 235, 0.05) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--space-lg);
            border: 2px solid rgba(37, 99, 235, 0.2);
            transition: all var(--transition-normal);
        }
        
        .service-card:hover .service-icon {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
            transform: scale(1.1);
        }
        
        .service-icon i {
            font-size: 1.75rem;
            color: var(--primary);
            transition: color var(--transition-normal);
        }
        
        .service-card:hover .service-icon i {
            color: white;
        }
        
        .service-card h4 {
            margin-top: 0;
            margin-bottom: var(--space-md);
            color: var(--secondary);
            font-size: 1.3rem;
            font-weight: 700;
        }
        
        .service-card p {
            color: var(--text-light);
            margin-bottom: var(--space-lg);
            flex-grow: 1;
            line-height: 1.7;
            font-size: 0.95rem;
        }
        
        .service-tech-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            margin-bottom: var(--space-lg);
        }
        
        .service-tech-tags span {
            display: inline-block;
            background: var(--surface-alt);
            color: var(--primary);
            padding: var(--space-xs) var(--space-sm);
            border-radius: var(--radius-sm);
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid var(--border);
            font-family: 'Roboto Mono', monospace;
            transition: all var(--transition-fast);
        }
        
        .service-tech-tags span:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }
        
        .service-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            margin-top: auto;
            padding: var(--space-sm) var(--space-md);
            border: 2px solid var(--primary);
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            width: fit-content;
        }
        
        .service-link:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        
        .service-link i {
            margin-left: var(--space-sm);
            transition: transform var(--transition-fast);
        }
        
        .service-link:hover i {
            transform: translateX(4px);
        }
        
        /* ============================================
           TIMELINE - EXPERIENCE
           ============================================ */
        .timeline-container {
            position: relative;
            padding-left: 0;
            margin: var(--space-2xl) 0;
        }
        
        @media (min-width: 768px) {
            .timeline-container {
                padding-left: var(--space-2xl);
            }
            
            .timeline-container::before {
                content: '';
                position: absolute;
                left: 1rem;
                top: 4rem;
                bottom: 0;
                width: 3px;
                background: linear-gradient(to bottom, var(--primary), var(--accent));
                border-radius: var(--radius-full);
            }
        }
        
        .timeline-item {
            position: relative;
            margin-bottom: var(--space-2xl);
            display: flex;
            gap: var(--space-lg);
        }
        
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        
        .timeline-marker {
            position: relative;
            flex-shrink: 0;
            width: 3rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding-top: 0;
        }
        
        @media (max-width: 767px) {
            .timeline-marker {
                display: none;
            }
        }
        
        .timeline-marker::before {
            content: '';
            position: sticky;
            top: 2rem;
            width: 14px;
            height: 14px;
            background: var(--primary);
            border-radius: var(--radius-full);
            border: 3px solid var(--surface);
            z-index: 1;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-fast);
            margin-top: 1.5rem;
        }
        
        .timeline-item:hover .timeline-marker::before {
            transform: translateX(-50%) scale(1.3);
            box-shadow: var(--shadow-xl), var(--shadow-glow);
        }
        
        .timeline-date {
            position: relative;
            display: inline-block;
            background: var(--surface-alt);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 700;
            padding: var(--space-xs) var(--space-sm);
            border-radius: var(--radius-full);
            white-space: nowrap;
            border: 1px solid var(--border);
            margin-bottom: var(--space-sm);
        }
        
        .timeline-content {
            flex: 1;
            min-width: 0;
        }
        
        .experience-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            box-shadow: var(--shadow-md);
            transition: all var(--transition-normal);
        }
        
        .experience-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl), var(--shadow-glow);
            border-color: var(--primary);
        }
        
        .experience-header {
            margin-bottom: var(--space-md);
            display: flex;
            flex-wrap: wrap;
            align-items: baseline;
            gap: var(--space-sm);
        }
        
        .company-name {
            font-weight: 700;
            color: var(--secondary);
            font-size: 1.3rem;
        }
        
        .job-title {
            color: var(--primary);
            font-weight: 600;
            font-size: 1.1rem;
        }
        
        .job-duration {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-left: auto;
        }
        
        @media (max-width: 767px) {
            .timeline-container {
                padding-left: 0;
            }
            
            .timeline-item {
                flex-direction: column;
                gap: 0;
            }
            
            .timeline-item {
                margin-bottom: var(--space-xl);
            }
            
            .experience-card {
                padding: var(--space-lg);
            }
            
            .job-duration {
                margin-left: 0;
                width: 100%;
            }
            
            .company-name {
                font-size: 1.2rem;
            }
            
            .job-title {
                font-size: 1rem;
            }
        }
        
        .job-description {
            margin-top: var(--space-sm);
            margin-bottom: var(--space-md);
            color: var(--text-light);
            font-size: 0.95rem;
            font-weight: 500;
        }
        
        .project-title {
            margin-top: var(--space-lg);
            margin-bottom: var(--space-sm);
            color: var(--secondary);
            font-size: 1.1rem;
            font-weight: 600;
        }
        
        .project-title:first-of-type {
            margin-top: var(--space-md);
        }
        
        .contributions-heading {
            font-weight: 700;
            color: var(--secondary);
            margin-top: var(--space-md);
            margin-bottom: var(--space-sm);
        }
        
        .contributions-list {
            list-style-type: none;
            padding-left: 0;
        }
        
        .contributions-list li {
            position: relative;
            padding-left: var(--space-lg);
            margin-bottom: var(--space-sm);
        }
        
        .contributions-list li::before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }
        
        .contribution-highlight {
            font-weight: 700;
            color: var(--secondary);
        }
        
        .technologies {
            margin-top: var(--space-lg);
            font-family: 'Roboto Mono', monospace;
            font-size: 0.8rem;
        }
        
        .technologies span {
            display: inline-block;
            background: var(--surface-alt);
            color: var(--primary);
            padding: var(--space-xs) var(--space-sm);
            border-radius: var(--radius-sm);
            margin-right: var(--space-xs);
            margin-bottom: var(--space-xs);
            border: 1px solid var(--border);
            font-size: 0.75rem;
            font-weight: 600;
            transition: all var(--transition-fast);
        }
        
        .technologies span:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            transform: translateY(-1px);
        }
        
        /* ============================================
           TESTIMONIALS
           ============================================ */
        .testimonials-section {
            margin-top: var(--space-3xl);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: var(--space-xl);
        }

        .testimonial-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            box-shadow: var(--shadow-md);
            transition: all var(--transition-normal);
        }
        
        .testimonial-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl);
        }

        .testimonial-header {
            display: flex;
            align-items: center;
            margin-bottom: var(--space-lg);
        }

        .author-info {
            flex-grow: 1;
        }

        .author-name {
            font-weight: 700;
            margin: 0;
            color: var(--secondary);
        }

        .author-title {
            font-size: 0.9rem;
            color: var(--text-light);
            margin: var(--space-xs) 0;
        }

        .author-relationship {
            font-size: 0.8rem;
            color: var(--text-lighter);
            margin: 0;
        }

        .testimonial-body p {
            font-style: italic;
            color: var(--text);
            margin: 0;
            line-height: 1.7;
        }
        
        .testimonial-body p::before {
            content: '"';
            font-size: 2rem;
            color: var(--primary);
            line-height: 0;
            vertical-align: -0.3em;
            margin-right: var(--space-xs);
        }
        
        .testimonial-body p::after {
            content: '"';
            font-size: 2rem;
            color: var(--primary);
            line-height: 0;
            vertical-align: -0.3em;
            margin-left: var(--space-xs);
        }
        
        /* ============================================
           CERTIFICATIONS
           ============================================ */
        .certification-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--space-lg);
        }

        .certification-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            gap: var(--space-lg);
            transition: all var(--transition-normal);
        }
        
        .certification-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        
        .certification-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary-light) 0%, rgba(37, 99, 235, 0.05) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        
        .certification-icon i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        
        .certification-info h4 {
            margin: 0;
            font-size: 1rem;
            color: var(--secondary);
            font-weight: 700;
        }
        
        .certification-info p {
            margin: var(--space-xs) 0;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        
        .certification-year {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
        }
        
        /* ============================================
           EDUCATION
           ============================================ */
        .education-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--space-lg);
        }
        
        .education-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            gap: var(--space-lg);
            transition: all var(--transition-normal);
        }
        
        .education-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        
        .education-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        
        .education-icon i {
            font-size: 1.5rem;
            color: var(--accent);
        }
        
        .education-details h4 {
            margin: 0;
            font-size: 1.05rem;
            color: var(--secondary);
            font-weight: 700;
        }
        
        .education-details .institution {
            color: var(--text-light);
            font-size: 0.9rem;
            margin: var(--space-xs) 0;
        }
        
        .education-details .year {
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 600;
        }
        
        .education-item, .certification-item {
            margin-bottom: var(--space-md);
        }
        
        /* ============================================
           LANGUAGES
           ============================================ */
        .languages-list {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-xl);
        }
        
        .language-item {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        
        .language-flag {
            font-size: 1.5rem;
        }
        
        .language-name {
            font-weight: 600;
            color: var(--secondary);
        }
        
        .language-level {
            margin-left: var(--space-xs);
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        /* ============================================
           HIRE ME SECTION
           ============================================ */
        #hire-me {
            margin-top: var(--space-3xl);
        }
        
        .hire-me-container {
            background: linear-gradient(135deg, var(--surface-alt) 0%, var(--surface) 50%, var(--surface-alt) 100%);
            border-radius: var(--radius-xl);
            padding: var(--space-2xl);
            box-shadow: var(--shadow-xl);
            margin: var(--space-lg) 0;
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        
        .hire-me-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--primary));
        }
        
        .hire-me-content p {
            font-size: 1.1rem;
            color: var(--secondary);
            margin-bottom: var(--space-xl);
        }
        
        .hire-me-benefits {
            margin-bottom: var(--space-xl);
        }
        
        .benefit-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: var(--space-md);
        }
        
        .benefit-item i {
            color: var(--accent);
            margin-right: var(--space-md);
            margin-top: 3px;
            font-size: 1.1rem;
        }
        
        .benefit-item span {
            color: var(--text);
        }
        
        .cta-buttons {
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        
        @media (min-width: 640px) {
            .cta-buttons {
                flex-direction: row;
                justify-content: center;
            }
        }
        
        .primary-cta {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--primary-hover));
            color: white;
            padding: var(--space-md) var(--space-xl);
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 700;
            text-align: center;
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-md);
        }
        
        .primary-cta:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-xl), var(--shadow-glow);
        }
        
        .primary-cta:active {
            transform: scale(0.98);
        }
        
        .secondary-cta {
            display: inline-block;
            background: var(--surface);
            color: var(--primary);
            padding: var(--space-md) var(--space-xl);
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 700;
            text-align: center;
            border: 2px solid var(--primary);
            transition: all var(--transition-normal);
        }
        
        .secondary-cta:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
        }
        
        .secondary-cta:active {
            transform: scale(0.98);
        }
        
        /* ============================================
           FOOTER
           ============================================ */
        .footer {
            margin-top: var(--space-3xl);
            padding-top: var(--space-xl);
            border-top: 1px solid var(--border);
            text-align: center;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        .last-updated {
            font-size: 0.8rem;
            color: var(--text-lighter);
            margin-top: var(--space-sm);
            font-style: italic;
        }
        
        /* ============================================
           UTILITIES & COMPONENTS
           ============================================ */
        .scrollToTop {
            position: fixed;
            bottom: var(--space-lg);
            right: var(--space-lg);
            width: 48px;
            height: 48px;
            line-height: 48px;
            text-align: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-hover));
            color: white;
            border-radius: var(--radius-full);
            opacity: 0;
            transition: all var(--transition-normal);
            cursor: pointer;
            box-shadow: var(--shadow-lg);
            z-index: 1000;
            border: none;
        }
        
        .scrollToTop.visible {
            opacity: 0.8;
        }
        
        .scrollToTop:hover {
            opacity: 1;
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl), var(--shadow-glow);
        }
        
        /* ============================================
           SCROLL PROGRESS BAR
           ============================================ */
        .scroll-progress-bar {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            z-index: 9999;
            transition: width 0.1s ease;
        }
        
        /* ============================================
           STICKY NAVIGATION
           ============================================ */
        .sticky-nav {
            position: fixed;
            top: -100px;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            padding: var(--space-sm) var(--space-lg);
            z-index: 1000;
            transition: top var(--transition-normal);
            box-shadow: var(--shadow-md);
        }
        
        .sticky-nav.visible {
            top: 0;
        }
        
        @media (prefers-color-scheme: dark) {
            .sticky-nav {
                background: rgba(15, 23, 42, 0.95);
            }
        }
        
        .sticky-nav-content {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .sticky-nav-logo {
            font-weight: 700;
            color: var(--secondary);
            text-decoration: none;
            font-size: 1.1rem;
        }
        
        .sticky-nav-links {
            display: flex;
            gap: var(--space-lg);
            align-items: center;
        }
        
        .sticky-nav-link {
            color: var(--text-light);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        
        .sticky-nav-link:hover {
            color: var(--primary);
        }
        
        .sticky-nav-cta {
            background: var(--primary);
            color: white;
            padding: var(--space-xs) var(--space-md);
            border-radius: var(--radius-md);
            text-decoration: none;
            font-size: 0.85rem;
            font-weight: 600;
            transition: all var(--transition-fast);
        }
        
        .sticky-nav-cta:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }
        
        .sticky-nav-pdf {
            background: var(--surface);
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: var(--space-xs) var(--space-md);
            border-radius: var(--radius-md);
            text-decoration: none;
            font-size: 0.85rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        
        .sticky-nav-pdf:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-1px);
        }
        
        /* ============================================
           PRINT CV BUTTON
           ============================================ */
        .print-cv-btn {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            background: var(--surface);
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: var(--space-sm) var(--space-lg);
            border-radius: var(--radius-md);
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-normal);
            font-size: 0.95rem;
        }
        
        .print-cv-btn:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        
        .print-cv-btn:active {
            transform: scale(0.98);
        }
        
        .print-cv-btn.loading {
            opacity: 0.7;
            cursor: wait;
        }
        
        /* ============================================
           FLOATING CTA BUTTON
           ============================================ */
        .floating-cta {
            position: fixed;
            bottom: var(--space-xl);
            right: var(--space-xl);
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
            align-items: flex-end;
        }
        
        .floating-cta-main {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-hover));
            color: white;
            padding: var(--space-md) var(--space-xl);
            border-radius: var(--radius-full);
            text-decoration: none;
            font-weight: 700;
            box-shadow: var(--shadow-xl), var(--shadow-glow);
            transition: all var(--transition-normal);
            animation: float 3s ease-in-out infinite;
        }
        
        .floating-cta-main:hover {
            transform: translateY(-4px) scale(1.05);
            box-shadow: var(--shadow-xl), 0 0 40px rgba(37, 99, 235, 0.5);
        }
        
        .floating-cta-main i {
            font-size: 1.2rem;
        }
        
        .floating-cta-secondary {
            display: flex;
            gap: var(--space-sm);
        }
        
        .floating-cta-btn {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-full);
            background: var(--surface);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            text-decoration: none;
            box-shadow: var(--shadow-lg);
            transition: all var(--transition-normal);
        }
        
        .floating-cta-btn:hover {
            transform: translateY(-4px);
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
        }
        
        /* Hide on mobile */
        @media (max-width: 768px) {
            .floating-cta {
                bottom: var(--space-lg);
                right: var(--space-lg);
            }
            
            .floating-cta-main span {
                display: none;
            }
            
            .floating-cta-main {
                padding: var(--space-md);
            }
        }
        
        /* ============================================
           AVAILABILITY BADGE
           ============================================ */
        .availability-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            background: rgba(16, 185, 129, 0.1);
            padding: var(--space-xs) var(--space-md);
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            margin-left: var(--space-md);
        }
        
        .availability-badge::before {
            content: '';
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: var(--radius-full);
            animation: pulse 2s ease-in-out infinite;
            box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
        }
        
        /* ============================================
           STATS SECTION
           ============================================ */
        .stats-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: var(--space-lg);
            margin: var(--space-2xl) 0;
            padding: var(--space-xl);
            background: linear-gradient(135deg, var(--surface-alt) 0%, var(--surface) 100%);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border);
        }
        
        .stat-item {
            text-align: center;
            padding: var(--space-md);
        }
        
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: var(--space-xs);
        }
        
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            font-weight: 500;
        }
        
        /* ============================================
           HERO BACKGROUND ENHANCEMENT
           ============================================ */
        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            overflow: hidden;
            z-index: 0;
            border-radius: var(--radius-lg);
        }
        
        .hero-gradient {
            position: absolute;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            filter: blur(100px);
            opacity: 0.15;
            animation: float 8s ease-in-out infinite;
        }
        
        .hero-gradient-1 {
            top: -200px;
            right: -100px;
            background: var(--primary);
            animation-delay: 0s;
        }
        
        .hero-gradient-2 {
            bottom: -150px;
            left: -100px;
            background: var(--accent);
            animation-delay: -4s;
        }
        
        .hero-gradient-3 {
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: #8b5cf6;
            animation-delay: -2s;
        }
        
        /* ============================================
           CARD 3D TILT EFFECT
           ============================================ */
        .tilt-card {
            transform-style: preserve-3d;
            transition: transform var(--transition-normal), box-shadow var(--transition-normal);
        }
        
        .tilt-card:hover {
            transform: translateY(-8px) rotateX(2deg) rotateY(-2deg);
            box-shadow: var(--shadow-xl), var(--shadow-glow);
        }
        
        /* ============================================
           ANIMATIONS - ENHANCED
           ============================================ */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        @keyframes pulse {
            0%, 100% { 
                opacity: 1;
                transform: scale(1);
            }
            50% { 
                opacity: 0.7;
                transform: scale(1.1);
            }
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }
        
        @keyframes countUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        /* Scroll-triggered animations */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        
        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .animate-on-scroll.delay-1 { transition-delay: 0.1s; }
        .animate-on-scroll.delay-2 { transition-delay: 0.2s; }
        .animate-on-scroll.delay-3 { transition-delay: 0.3s; }
        .animate-on-scroll.delay-4 { transition-delay: 0.4s; }
        
        /* ============================================
           BUTTON PRESS EFFECT
           ============================================ */
        .btn-press:active {
            transform: scale(0.95);
        }
        
        /* ============================================
           SMOOTH PAGE LOAD
           ============================================ */
        .page-loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--body-bg);
            z-index: 10000;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: opacity 0.5s ease, visibility 0.5s ease;
        }
        
        .page-loader.hidden {
            opacity: 0;
            visibility: hidden;
        }
        
        .page-loader-spinner {
            width: 48px;
            height: 48px;
            border: 4px solid var(--border);
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        .print-only {
            display: none;
        }
        
        /* ============================================
           RESPONSIVE ADJUSTMENTS
           ============================================ */
        @media (max-width: 768px) {
            html {
                font-size: 15px;
            }
            
            body {
                padding: var(--space-md);
            }
            
            section {
                margin-bottom: var(--space-2xl);
            }
            
            h1 {
                font-size: 2rem;
            }
            
            h2 {
                font-size: 1.5rem;
            }
            
            .hero-section {
                padding: var(--space-lg);
            }
            
            .skills-grid {
                grid-template-columns: 1fr;
            }
            
            .services-grid {
                grid-template-columns: 1fr;
            }
            
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            
            .timeline-container {
                margin: var(--space-lg) 0;
            }
        }
        
        @media (max-width: 320px) {
            body {
                padding: var(--space-sm);
            }
            
            h1 {
                font-size: 1.75rem;
            }
            
            .profile-img {
                width: 120px;
                height: 120px;
            }
        }
        
        /* ============================================
           PRINT STYLES
           ============================================ */
        @media print {
            body {
                padding: 0;
                font-size: 10pt;
                line-height: 1.4;
                background-color: white !important;
                color: black !important;
            }
            
            p, li {
                font-size: 10pt;
                color: black !important;
            }
            
            h1 { font-size: 18pt; color: black !important; }
            h2 { font-size: 14pt; color: black !important; page-break-after: avoid; }
            h3, h4 { font-size: 12pt; color: black !important; page-break-after: avoid; }
            
            .container { width: 100%; padding: 0; margin: 0; }
            .main-content { padding: 0; margin: 0; }
            
            section, .experience-item { page-break-inside: avoid; }
            
            /* Hide elements not needed in PDF */
            .scrollToTop,
            .scroll-progress-bar,
            .sticky-nav,
            .floating-cta,
            .page-loader,
            .print-cv-btn,
            .footer,
            .social-links,
            .contact-cta,
            .testimonials-section,
            .cta-buttons,
            .hire-me-container,
            #hire-me,
            .cv-links,
            .availability-badge,
            .stats-section,
            .back-link,
            .hero-section,
            .service-link,
            .resource-link { 
                display: none !important; 
            }
            
            .skill-tag, .highlight-tag, .tech-tag, .achievement-metric, .service-card,
            .value-prop, .github-card, .achievement-card, .technologies span {
                background-color: white !important;
                border: 1pt solid #ddd !important;
                color: black !important;
                box-shadow: none !important;
            }
            
            .service-icon { display: none; }
            
            .profile-img { 
                display: block !important;
                width: 100px !important;
                height: 100px !important;
                border: 2px solid #333 !important;
                box-shadow: none !important;
            }
            
            a { text-decoration: none; color: black !important; }
            
            .header::after {
                content: "Email: iklobato@proton.me";
                display: block;
                text-align: center;
                margin-top: 0.5rem;
                font-size: 10pt;
            }
            
            * {
                color: black !important;
                background-color: white !important;
            }
            
            .print-only { display: block !important; }
        }

/* ============================================================
   INTERACTIONS — tech filter, timeline collapse, qualifier,
   case-study reveal, theme toggle
   ============================================================ */

/* Manual theme override (takes precedence over prefers-color-scheme) */
html[data-theme="dark"] {
  --primary: var(--primary-dark);
  --secondary: var(--secondary-dark);
  --text: var(--text-dark);
  --text-light: var(--text-light-dark);
  --border: var(--border-dark);
  --surface: var(--surface-dark);
  --surface-alt: var(--surface-alt-dark);
  --body-bg: var(--body-bg-dark);
}
html[data-theme="light"] {
  --primary: #2563eb;
  --secondary: #1e293b;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --body-bg: #ffffff;
}

#theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1001;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
#theme-toggle:hover { transform: scale(1.08); box-shadow: var(--shadow-lg); }
#theme-toggle .fa-sun { display: none; }
#theme-toggle .fa-moon { display: inline-block; }
html[data-theme="dark"] #theme-toggle .fa-sun,
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) #theme-toggle .fa-sun { display: inline-block; }
  html:not([data-theme="light"]) #theme-toggle .fa-moon { display: none; }
}
html[data-theme="dark"] #theme-toggle .fa-moon { display: none; }

/* ---------- Tech filter bar ---------- */
.tech-filter-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  margin: 0.5rem 0 1.5rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
}
.tech-filter-label {
  color: var(--text-light);
  font-weight: 500;
}
.tech-filter-label .fa-filter { margin-right: 0.35rem; color: var(--primary); }
.tech-filter-current {
  font-weight: 600;
  color: var(--primary);
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  min-height: 1.5em;
}
.tech-filter-current:empty { display: none; }
.tech-filter-clear {
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  transition: background var(--transition-fast);
}
.tech-filter-clear:hover { background: var(--primary-light); }

/* Skill tags clickable + focusable */
.skill-tag {
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast);
}
.skill-tag:hover { transform: translateY(-1px); }
.skill-tag:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Highlight the active filter tag across the page */
body[data-active-filter] .skill-tag { opacity: 0.45; }
body[data-active-filter] .skill-tag.is-active,
body[data-active-filter] .skill-category-card.is-match .skill-tag { opacity: 1; }

/* Dim cards that don't match the active filter */
body[data-active-filter] .experience-card,
body[data-active-filter] .service-card,
body[data-active-filter] .skill-category-card {
  opacity: 0.35;
  transition: opacity var(--transition-normal);
}

/* The active-filter match rule is injected at runtime by interactions.js
   (#tech-filter-style) so it can use the clicked tech name verbatim. */
.skill-tag.is-active {
  background: var(--primary) !important;
  color: #fff !important;
  opacity: 1 !important;
}

/* ---------- Expandable timeline ---------- */
.experience-card {
  position: relative;
  transition: padding var(--transition-normal);
}
.experience-body {
  overflow: hidden;
  max-height: 4000px;
  transition: max-height 400ms ease, opacity var(--transition-normal);
}
.experience-card.collapsed .experience-body {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
}
.experience-toggle {
  margin-top: 1rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--primary);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.experience-toggle:hover { background: var(--primary-light); }
.experience-toggle .fa-chevron-down {
  transition: transform var(--transition-normal);
}
.experience-card.collapsed .experience-toggle .fa-chevron-down {
  transform: rotate(-90deg);
}

/* ---------- Project qualifier ---------- */
.qualifier-form {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.qualifier-intro {
  margin: 0 0 1rem;
  color: var(--text);
  font-size: 1rem;
}
.qualifier-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.25rem;
}
@media (max-width: 768px) {
  .qualifier-row { grid-template-columns: 1fr; }
}
.qualifier-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
}
.qualifier-field select {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.qualifier-field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.qualifier-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.qualifier-book, .qualifier-email {
  flex: 1 1 auto;
  min-width: 200px;
}

/* ---------- Case-study collapsible (use-case pages) ---------- */
.use-case.collapsible .use-case-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  user-select: none;
}
.use-case-toggle {
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--border);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--primary);
  transition: transform var(--transition-normal), background var(--transition-fast);
}
.use-case-toggle:hover { background: var(--primary-light); }
.use-case.collapsed .use-case-toggle .fa-chevron-down {
  transform: rotate(-90deg);
}
.use-case.collapsed .section:not(.impact-section) {
  display: none;
}
.use-case.collapsible .section {
  transition: opacity var(--transition-normal);
}
.use-case.collapsible .section .impact {
  animation: fadeIn 300ms ease;
}

/* Allow reduced motion to skip transitions */
@media (prefers-reduced-motion: reduce) {
  .experience-body,
  .experience-toggle .fa-chevron-down,
  .use-case-toggle,
  body[data-active-filter] .experience-card,
  body[data-active-filter] .service-card,
  body[data-active-filter] .skill-category-card {
    transition: none !important;
  }
}