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

        body {
            font-family: 'Inter', sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.5;
            transition: background 0.3s ease, color 0.2s ease;
            scroll-behavior: smooth;
        }

        /* Light / Dark Theme */
        :root {
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --surface: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #334155;
            --accent: #3b82f6;
            --accent-hover: #2563eb;
            --border: #e2e8f0;
            --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
            --nav-bg: rgba(255, 255, 255, 0.85);
            --glass-blur: blur(12px);
            --btn-lang-bg: #f1f5f9;
            --btn-lang-border: #cbd5e1;
        }

        [data-theme="dark"] {
            --bg-primary: #0f172a;
            --bg-secondary: #1e293b;
            --surface: #1e293b;
            --text-primary: #f1f5f9;
            --text-secondary: #cbd5e1;
            --border: #334155;
            --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
            --nav-bg: rgba(15, 23, 42, 0.85);
            --btn-lang-bg: #334155;
            --btn-lang-border: #475569;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        section {
            padding: 5rem 0;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 2.5rem;
            text-align: center;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent), #8b5cf6);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }

        /* Header & Navigation */
        header {
            position: sticky;
            top: 0;
            backdrop-filter: var(--glass-blur);
            background: var(--nav-bg);
            border-bottom: 1px solid var(--border);
            z-index: 100;
            padding: 0.8rem 0;
        }

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

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent), #8b5cf6);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
        }

        .nav-links {
            display: flex;
            gap: 1.5rem;
            align-items: center;
            list-style: none;
        }

        .nav-links a {
            font-weight: 500;
            transition: color 0.2s;
        }

        .nav-links a:hover {
            color: var(--accent);
        }

        /* Botões de tema e idioma – ambos respeitam o tema escuro/claro */
        .theme-toggle, .lang-toggle {
            background: var(--btn-lang-bg);
            border: 1px solid var(--btn-lang-border);
            border-radius: 40px;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: all 0.2s ease;
            color: var(--text-primary);
        }
        .lang-toggle {
            width: auto;
            padding: 0 1rem;
            gap: 0.3rem;
        }
        .theme-toggle:hover, .lang-toggle:hover {
            border-color: var(--accent);
            transform: scale(1.02);
        }

        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: var(--text-primary);
        }

        /* Hero */
        .hero {
            display: flex;
            align-items: center;
            gap: 2rem;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        .hero-content {
            flex: 1;
        }
        .hero-badge {
            background: var(--bg-secondary);
            padding: 0.3rem 1rem;
            border-radius: 40px;
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.2rem;
            border: 1px solid var(--border);
        }
        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }
        .highlight {
            color: var(--accent);
        }
        .hero-content p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 550px;
        }
        .btn-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--accent);
            color: white;
            padding: 0.8rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            transition: 0.2s;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
        }
        .btn-outline {
            border: 1.5px solid var(--border);
            background: transparent;
            padding: 0.8rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            transition: 0.2s;
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .hero-illustration {
            flex: 1;
            text-align: center;
            font-size: 10rem;
            color: var(--accent);
            opacity: 0.8;
        }

        /* About */
        .about-grid {
            display: flex;
            gap: 3rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .about-text {
            flex: 2;
        }
        .about-text p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
            font-size: 1.05rem;
        }
        .about-icon {
            flex: 1;
            text-align: center;
            font-size: 8rem;
            color: var(--accent);
        }

        /* Skills */
        .skills-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.8rem;
        }
        .skill-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            padding: 0.6rem 1.4rem;
            border-radius: 60px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: all 0.2s;
        }
        .skill-card:hover {
            border-color: var(--accent);
            transform: scale(1.02);
        }

        /* Projects */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 2rem;
        }
        .project-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 1.5rem;
            overflow: hidden;
            transition: 0.25s ease;
            box-shadow: var(--card-shadow);
        }
        .project-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent);
        }
        .project-img {
            background: var(--bg-secondary);
            height: 160px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3.5rem;
            color: var(--accent);
            border-bottom: 1px solid var(--border);
        }
        .project-info {
            padding: 1.5rem;
        }
        .project-info h3 {
            margin-bottom: 0.5rem;
            font-size: 1.3rem;
        }
        .project-info p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
            font-size: 0.9rem;
        }
        .project-tech {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.2rem;
        }
        .tech-tag {
            background: var(--bg-secondary);
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.7rem;
            font-weight: 500;
        }
        .project-link {
            color: var(--accent);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.9rem;
        }

        /* Education & Awards */
        .education-grid {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .edu-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 1.2rem;
            padding: 1.2rem 1.5rem;
        }
        .edu-title {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.2rem;
        }
        .edu-meta {
            color: var(--accent);
            font-size: 0.85rem;
            margin-bottom: 0.5rem;
        }
        .award-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .award-badge {
            background: var(--bg-secondary);
            padding: 0.4rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            border: 1px solid var(--border);
        }

        /* Contact */
        .contact-container {
            max-width: 700px;
            margin: 0 auto;
            background: var(--surface);
            border-radius: 2rem;
            padding: 2rem;
            border: 1px solid var(--border);
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        input, textarea {
            width: 100%;
            padding: 1rem;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 1rem;
            font-family: inherit;
            color: var(--text-primary);
            font-size: 1rem;
        }
        input:focus, textarea:focus {
            outline: none;
            border-color: var(--accent);
        }
        textarea {
            min-height: 120px;
        }
        footer {
            text-align: center;
            padding: 2rem;
            border-top: 1px solid var(--border);
            color: var(--text-secondary);
        }
        .social-links {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 1rem;
        }
        .social-links a {
            font-size: 1.4rem;
            transition: 0.2s;
        }
        .social-links a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .container { padding: 0 1.5rem; }
            .hamburger { display: block; }
            .nav-links {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 80%;
                height: calc(100vh - 70px);
                background: var(--surface);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 3rem;
                gap: 2rem;
                transition: left 0.3s ease;
                box-shadow: 2px 0 12px rgba(0,0,0,0.1);
                border-right: 1px solid var(--border);
                z-index: 99;
            }
            .nav-links.active { left: 0; }
            .hero-content h1 { font-size: 2.2rem; }
            .hero-illustration { font-size: 6rem; }
        }