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

        :root {
            --primary: #008080;
            --primary-light: #14b8a6;
            --primary-dark: #0d9488;
            --background: #ffffff;
            --foreground: #0d0d12;
            --muted: #f4f4f5;
            --muted-foreground: #52525b;
            --border: #e4e4e7;
            --card: #ffffff;
        }

        .dark {
            --primary: #14b8a6;
            --primary-light: #2dd4bf;
            --primary-dark: #0d9488;
            --background: #0d0d12;
            --foreground: #fafaf9;
            --muted: #18181b;
            --muted-foreground: #a1a1aa;
            --border: #27272a;
            --card: #18181b;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            color: var(--foreground);
            background-color: var(--background);
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        /* Skip to content */
        .skip-to-content {
            position: absolute;
            top: -100%;
            left: 0;
            z-index: 1000;
            padding: 0.75rem 1.5rem;
            background: var(--primary);
            color: #0d0d12;
            font-weight: 700;
            text-decoration: none;
            border-radius: 0 0 0.5rem 0;
            transition: top 0.2s;
        }

        .skip-to-content:focus {
            top: 0;
        }

        /* Navigation */
        nav {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 100;
            background: rgba(13, 13, 18, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
        }
        
        nav ul li a.active {
            color: var(--primary);
        }
        
        /* Mobile navigation toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 0.75rem;
            min-width: 48px;
            min-height: 48px;
            justify-content: center;
            align-items: center;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--foreground);
            transition: all 0.3s;
        }
        
        .nav-toggle span.active {
            background-color: var(--primary);
        }
        
        .nav-toggle span.active:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        
        .nav-toggle span.active:nth-child(2) {
            opacity: 0;
        }
        
        .nav-toggle span.active:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        
        nav .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

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

        nav .logo:hover {
            opacity: 0.8;
        }

        nav ul {
            display: none;
            list-style: none;
            gap: 2.5rem;
        }

        @media (min-width: 768px) {
            nav ul {
                display: flex;
            }
        }

        @media (max-width: 767px) {
            .nav-toggle {
                display: flex;
                margin-left: auto;
                order: 1;
            }

            nav ul {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(13, 13, 18, 0.95);
                backdrop-filter: blur(16px);
                display: flex;
                flex-direction: column;
                align-items: center;
                padding: 2rem 0;
                gap: 1.5rem;
                opacity: 0;
                pointer-events: none;
                transform: translateX(-100%);
                transition: 0.3s;
            }

            nav ul.active {
                opacity: 1;
                pointer-events: all;
                transform: translateX(0);
            }
        }

        nav ul li a {
            color: var(--foreground);
            font-size: 0.95rem;
            transition: color 0.2s;
            position: relative;
            overflow: hidden;
        }

        nav ul li a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -5px;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s ease;
        }

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

        nav ul li a:hover::after,
        nav ul li a.active::after,
        nav ul li a:focus-visible::after {
            width: 100%;
        }

        nav ul li a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
        }

        .nav-btn {
            background: var(--primary);
            color: #0d0d12;
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            font-size: 0.875rem;
            font-weight: 600;
            transition: all 0.2s;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
        }

        @media (max-width: 767px) {
            .nav-btn {
                display: none;
            }
        }

        .nav-btn:hover {
            opacity: 0.9;
            transform: translateY(-1px);
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 8rem 0 5rem;
        }

        @media (min-width: 1024px) {
            .hero {
                padding: 10rem 0 7rem;
            }
        }

        .hero .container {
            display: grid;
            grid-template-columns: 1fr;
            gap: 4rem;
            align-items: center;
        }

        @media (min-width: 1024px) {
            .hero .container {
                grid-template-columns: 1.2fr 1fr;
                gap: 6rem;
            }
        }

        .hero-content .tagline {
            color: var(--primary);
            font-size: 0.875rem;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            margin-bottom: 1rem;
        }

        .hero-content h1 {
            font-size: clamp(1.75rem, 4vw, 2.75rem);
            font-weight: 700;
            line-height: 1.15;
            margin-bottom: 1rem;
        }

        .hero-content h1 span {
            font-style: italic;
            background: linear-gradient(to right, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content .description {
            font-size: 1rem;
            color: var(--muted-foreground);
            max-width: 540px;
            margin-bottom: 1.5rem;
        }

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

        .btn-primary {
            background: var(--primary);
            color: #0d0d12;
            padding: 0.875rem 2rem;
            border-radius: 0.5rem;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            min-height: 44px;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 40px rgba(20, 184, 166, 0.3);
        }

        .btn-outline {
            background: transparent;
            color: var(--foreground);
            padding: 0.875rem 2rem;
            border-radius: 0.5rem;
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid var(--border);
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .hero-image {
            display: flex;
            justify-content: center;
        }

        .hero-image-wrapper {
            position: relative;
            width: 320px;
            height: 320px;
        }

        @media (min-width: 1024px) {
            .hero-image-wrapper {
                width: 400px;
                height: 400px;
            }
        }

        .hero-image-wrapper::before {
            content: '';
            position: absolute;
            inset: -20px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 2rem;
            opacity: 0.3;
            filter: blur(40px);
            z-index: -1;
        }

        .hero-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 1.5rem;
            border: 3px solid var(--primary);
            transition: transform 0.5s ease;
        }

        .hero-image-wrapper:hover img {
            transform: scale(1.05);
        }

        /* Stats Section */
        .stats {
            padding: 4rem 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            background: var(--muted);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(1, 1fr);
            gap: 2rem;
            text-align: center;
        }

        @media (min-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
                text-align: left;
            }
        }

        .stat-item {
            padding: 1rem;
        }

        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 0.5rem;
        }

        .stat-label {
            color: var(--muted-foreground);
            font-size: 1rem;
        }

        /* Section Styles */
        section {
            padding: 6rem 0;
        }

        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 3rem;
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

        .section-title:hover::after {
            width: 80px;
        }

        /* About Section */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 4rem;
        }

        @media (min-width: 1024px) {
            .about-grid {
                grid-template-columns: 1.3fr 1fr;
                gap: 6rem;
            }
        }

        .about-text p {
            color: var(--muted-foreground);
            font-size: 1.125rem;
            line-height: 1.8;
            margin-bottom: 1.25rem;
        }

        .about-text .highlight {
            color: var(--foreground);
            font-weight: 600;
        }

        .experience-list {
            padding-left: 1.5rem;
            border-left: 3px solid var(--primary);
        }

        .experience-list h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .experience-list ul {
            list-style: none;
        }

        .experience-list li {
            color: var(--muted-foreground);
            margin-bottom: 0.75rem;
            padding-left: 0.5rem;
        }

        .location {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--muted-foreground);
            margin-top: 2rem;
            font-size: 0.95rem;
        }

        /* Common card transitions */
        .experience-card,
        .cert-card,
        .contact-form-wrapper,
        .contact-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .experience-card:hover,
        .cert-card:hover,
        .contact-form-wrapper:hover,
        .contact-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }

        /* Experience Section */
        .experience-section {
            background: var(--muted);
        }

        .experience-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 1rem;
            padding: 2rem;
            margin-bottom: 2rem;
        }

        .experience-card:last-child {
            margin-bottom: 0;
        }

        @media (min-width: 768px) {
            .experience-card {
                display: grid;
                grid-template-columns: 280px 1fr;
                gap: 3rem;
                padding: 2.5rem;
            }
        }

        .experience-meta {
            margin-bottom: 1rem;
        }

        @media (min-width: 768px) {
            .experience-meta {
                margin-bottom: 0;
            }
        }

        .experience-company {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.125rem;
            margin-bottom: 0.25rem;
        }

        .experience-date {
            color: var(--muted-foreground);
            font-size: 0.875rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .experience-date svg {
            color: var(--primary);
        }

        .experience-content {
            border-left: none;
            padding-left: 0;
        }

        @media (min-width: 768px) {
            .experience-content {
                border-left: 1px solid var(--border);
                padding-left: 2rem;
            }
        }

        .experience-role {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.25rem;
        }

        .experience-location {
            color: var(--muted-foreground);
            font-size: 0.95rem;
            margin-bottom: 1.25rem;
        }

        .experience-description {
            list-style: none;
        }

        .experience-description li {
            color: var(--muted-foreground);
            margin-bottom: 0.5rem;
            padding-left: 1.25rem;
            position: relative;
        }

        .experience-description li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--primary);
        }

        /* Skills Section */
        .skills-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }

        @media (min-width: 768px) {
            .skills-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .skill-category {
            margin-bottom: 1.5rem;
        }

        .skill-category:last-child {
            margin-bottom: 0;
        }

        .skill-category h3 {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--foreground);
        }

        .skill-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .skill-badge {
            background: var(--muted);
            color: var(--muted-foreground);
            padding: 0.5rem 1rem;
            border-radius: 2rem;
            font-size: 0.875rem;
            border: 1px solid var(--border);
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }
        
        .skill-badge:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: rgba(20, 184, 166, 0.1);
            transform: scale(1.05) rotate(-2deg);
            box-shadow: 0 5px 15px rgba(20, 184, 166, 0.2);
        }
        
        /* Group skills with subtle dividers */
        .skill-badges .skill-badge:nth-child(3n) {
            margin-right: 0;
        }

        /* Certifications Section */
        .certs-section {
            background: var(--muted);
        }

        .certs-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }

        .certs-group-title {
            grid-column: 1 / -1;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            margin: 1.5rem 0 0.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary);
        }

        .certs-group-title:first-child {
            margin-top: 0;
        }

        @media (min-width: 640px) {
            .certs-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .certs-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .cert-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 1rem;
            overflow: hidden;
            transition: all 0.3s;
            cursor: pointer;
            position: relative;
        }

        .cert-card::after {
            content: '↗';
            position: absolute;
            top: 0.75rem;
            right: 0.75rem;
            width: 24px;
            height: 24px;
            background: var(--primary);
            color: #0d0d12;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            opacity: 0;
            transform: scale(0.8);
            transition: all 0.2s;
        }

        .cert-card:hover::after {
            opacity: 1;
            transform: scale(1);
        }

        .cert-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            border-color: var(--primary);
        }

        .cert-image {
            width: 100%;
            height: 100px;
            object-fit: cover;
            border-bottom: 1px solid var(--border);
            transition: transform 0.5s ease;
        }

        .cert-card:hover .cert-image {
            transform: scale(1.05);
        }

        .cert-content {
            padding: 1rem;
        }

        .cert-content h3 {
            font-size: 0.875rem;
            font-weight: 700;
            margin-bottom: 0.25rem;
        }

        .cert-content p {
            color: var(--muted-foreground);
            font-size: 0.75rem;
        }

        /* Contact Section */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 4rem;
        }

        @media (min-width: 1024px) {
            .contact-grid {
                grid-template-columns: 1fr 1fr;
                gap: 6rem;
            }
        }

        .contact-info h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .contact-info > p {
            color: var(--muted-foreground);
            font-size: 1.25rem;
            margin-bottom: 2rem;
        }

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

        .contact-list li {
            margin-bottom: 1rem;
        }

        .contact-list a {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 1.125rem;
            transition: color 0.2s;
        }

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

        .contact-list .icon {
            font-size: 1.5rem;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            border-radius: 50%;
            background-color: var(--muted);
            transition: background-color 0.2s;
        }

        .contact-list .icon svg {
            color: var(--primary);
        }

        .contact-list a:hover .icon {
            background-color: var(--primary);
        }

        .contact-list a:hover .icon svg {
            color: #0d0d12;
        }

        .btn-primary svg {
            color: #0d0d12;
        }

        .contact-card {
            background: var(--muted);
            border-radius: 1rem;
            padding: 2.5rem;
            border: 1px solid var(--border);
        }

        .contact-card h3 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .contact-card .title {
            color: var(--primary);
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .contact-card .desc {
            color: var(--muted-foreground);
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }

        /* Contact Form */
        .contact-form-wrapper {
            background: var(--muted);
            border-radius: 1rem;
            padding: 2.5rem;
            border: 1px solid var(--border);
        }

        .contact-form-wrapper h3 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .form-group label {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--foreground);
        }

        .form-group input,
        .form-group textarea {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 0.5rem;
            padding: 0.875rem 1rem;
            font-size: 1rem;
            color: var(--foreground);
            transition: border-color 0.2s, box-shadow 0.2s;
            font-family: inherit;
            resize: vertical;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--muted-foreground);
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
        }

        .form-group textarea {
            min-height: 120px;
        }

        .contact-form .btn-primary {
            align-self: flex-start;
            margin-top: 0.5rem;
            cursor: pointer;
            border: none;
            font-family: inherit;
        }

        .form-note {
            margin-top: 1.5rem;
            font-size: 0.875rem;
            color: var(--muted-foreground);
        }

        .form-note a {
            color: var(--primary);
            text-decoration: underline;
        }

        /* Footer */
        footer {
            padding: 3rem 0;
            border-top: 1px solid var(--border);
        }

        footer .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
            text-align: center;
        }

        @media (min-width: 768px) {
            footer .container {
                flex-direction: row;
                justify-content: space-between;
                text-align: left;
            }
        }

        footer p {
            color: var(--muted-foreground);
            font-size: 0.875rem;
        }

        
/* Page entrance animation for content below the fold - hero/nav excluded for LCP */
body > header,
body > main,
body > section,
body > footer {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

body > header { animation-delay: 0.1s; }
body > main { animation-delay: 0.2s; }
body > section:nth-of-type(1) { animation-delay: 0.3s; }
body > section:nth-of-type(2) { animation-delay: 0.4s; }
body > section:nth-of-type(3) { animation-delay: 0.5s; }
body > section:nth-of-type(4) { animation-delay: 0.6s; }
body > section:nth-of-type(5) { animation-delay: 0.7s; }
body > section:nth-of-type(6) { animation-delay: 0.8s; }
body > footer { animation-delay: 0.9s; }

/* Nav and hero sections must render immediately for LCP */
body > nav,
body > section.hero,
body > header.portfolio-hero {
    opacity: 1;
    transform: none;
    animation: none;
}

/* Floating WhatsApp Button - Critical Styles */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background-color: #25d366;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1000;
    opacity: 1;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.whatsapp-float:hover {
    background-color: #20ba5a;
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

.whatsapp-float:active {
    transform: scale(0.95);
}

.whatsapp-float svg {
    width: 28px;
    height: 28px;
    fill: currentColor;
}
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* Footer animation */
        footer {
            position: relative;
            overflow: hidden;
        }
        
        footer::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(20,184,166,0.1) 0%, transparent 70%);
            animation: pulse 4s infinite;
            z-index: -1;
        }
        
        @keyframes pulse {
            0% {
                transform: scale(0.8);
                opacity: 0.5;
            }
            50% {
                transform: scale(1.2);
                opacity: 0.8;
            }
            100% {
                transform: scale(0.8);
                opacity: 0.5;
            }
        }