/* =========================================================================
           VÁRIAVEIS & TOKENS DE DESIGN (SaaS High-End / Modern Tech Dark)
           ========================================================================= */
        :root {
            /* Cores de Fundo (Padrão GitHub / Tech) */
            --bg-primary: #0D1117;
            --bg-secondary: #161B22;
            --bg-card-hover: #1f242c;
            
            /* Textos */
            --text-heading: #FFFFFF;
            --text-body: #8B949E;
            --text-muted: #484F58;
            
            /* Acentos & Glows */
            --accent-cyan: #008AE9;
            --accent-purple: #BC8CFF;
            --accent-glow: rgba(0, 138, 233, 0.15);
            --accent-glow-strong: rgba(0, 138, 233, 0.4);
            
            /* UI Elements */
            --border-default: rgba(255, 255, 255, 0.1);
            --border-hover: rgba(255, 255, 255, 0.25);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            
            /* Tipografia */
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
        }

        /* =========================================================================
           RESET & BASE
           ========================================================================= */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        ::selection {
            background-color: var(--accent-cyan);
            color: var(--bg-primary);
        }

        /* =========================================================================
           TIPOGRAFIA
           ========================================================================= */
        h1, h2, h3, h4 {
            color: var(--text-heading);
            font-weight: 800;
            line-height: 1.1;
        }

        h1 {
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            letter-spacing: -0.04em;
            margin-bottom: 1.5rem;
        }

        h2 {
            font-size: clamp(2rem, 4vw, 3rem);
            letter-spacing: -0.03em;
            margin-bottom: 1rem;
        }

        h3 {
            font-size: 1.5rem;
            letter-spacing: -0.02em;
            margin-bottom: 0.5rem;
        }

        p {
            font-size: clamp(1rem, 1.5vw, 1.125rem);
            max-width: 65ch;
            margin-bottom: 1.5rem;
        }

        /* =========================================================================
           LAYOUT & CONTAINERS
           ========================================================================= */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        section {
            padding: 8rem 0;
            position: relative;
        }

        .section-header {
            margin-bottom: 4rem;
            max-width: 700px;
        }

        /* =========================================================================
           COMPONENTES: BOTÕES
           ========================================================================= */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
            padding: 1rem 2rem;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.25s ease;
            cursor: pointer;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(
                to right,
                #01A5FE 0%,
                #0064AE 50%,
                #012951 100%,
                #0064AE 150%,
                #01A5FE 200%
            );
            background-size: 200% auto;
            color: #FFFFFF;
            box-shadow: 0 4px 20px var(--accent-glow);
            animation: animateGradient 6s linear infinite;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px var(--accent-glow-strong);
            background-position: right center;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--text-heading);
            border-color: var(--border-default);
        }

        .btn-secondary:hover {
            background-color: var(--bg-secondary);
            border-color: var(--border-hover);
        }

        /* =========================================================================
           COMPONENTES: BENTO GRID & CARDS
           ========================================================================= */
        .bento-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 1.5rem;
        }

        .card {
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-md);
            padding: 2.5rem;
            position: relative;
            overflow: hidden;
            transition: transform 0.3s ease, border-color 0.3s ease;
            z-index: 1;
        }

        .card::after {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(135deg, rgba(255,255,255,0.03) 0%, transparent 100%);
            z-index: -1;
            pointer-events: none;
        }

        .card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            background-color: var(--bg-card-hover);
        }

        .col-span-12 { grid-column: span 12; }
        .col-span-6 { grid-column: span 12; }
        .col-span-4 { grid-column: span 12; }
        .col-span-8 { grid-column: span 12; }

        @media (min-width: 768px) {
            .col-span-6 { grid-column: span 6; }
            .col-span-4 { grid-column: span 6; }
            .col-span-8 { grid-column: span 8; }
        }

        @media (min-width: 1024px) {
            .col-span-4 { grid-column: span 4; }
        }

        /* Badge/Tag */
        .badge {
            display: inline-block;
            padding: 0.4rem 0.8rem;
            background-color: rgba(0, 138, 233, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 138, 233, 0.2);
            border-radius: 100px;
            font-size: 0.875rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
        }

        /* Ícones dentro de cards */
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background-color: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-default);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--accent-cyan);
        }

        /* =========================================================================
           CÓDIGO / TERMINAL PREVIEW
           ========================================================================= */
        .code-window {
            background-color: #0d1117;
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-top: 2rem;
            font-family: var(--font-mono);
            font-size: 0.85rem;
        }
        
        .code-header {
            background-color: #161b22;
            border-bottom: 1px solid var(--border-default);
            padding: 0.75rem 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .mac-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }
        .mac-dot.red { background-color: #ff5f56; }
        .mac-dot.yellow { background-color: #ffbd2e; }
        .mac-dot.green { background-color: #27c93f; }

        .code-body {
            padding: 1.5rem;
            color: #c9d1d9;
            overflow-x: auto;
        }

        .token-keyword { color: #ff7b72; }
        .token-function { color: #d2a8ff; }
        .token-string { color: #a5d6ff; }
        .token-comment { color: #8b949e; font-style: italic; }

        /* =========================================================================
           FEITOS VISUAIS (GLOWS & MESH GRADIENTS)
           ========================================================================= */
        .glow-mesh {
            position: absolute;
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(0, 138, 233, 0.15) 0%, transparent 60%);
            top: -200px;
            right: -200px;
            z-index: -1;
            pointer-events: none;
            filter: blur(60px);
        }

        .glow-mesh-2 {
            position: absolute;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(188, 140, 255, 0.1) 0%, transparent 60%);
            bottom: 0;
            left: -200px;
            z-index: -1;
            pointer-events: none;
            filter: blur(50px);
        }

        /* =========================================================================
           CABEÇALHO & NAVEGAÇÃO
           ========================================================================= */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            padding: 1.5rem 0;
            z-index: 100;
            background-color: rgba(13, 17, 23, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            border-image: linear-gradient(
                to right,
                #01A5FE 0%,
                #0064AE 50%,
                #012951 100%
            ) 1;
            transition: transform 0.3s ease;
        }

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

        .logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-heading);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--accent-cyan);
            border-radius: 50%;
            box-shadow: 0 0 10px var(--accent-cyan);
        }

        /* =========================================================================
           SEÇÕES ESPECÍFICAS
           ========================================================================= */
        /* Hero Section */
        .hero {
            padding-top: 12rem;
            padding-bottom: 6rem;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100%;
            height: 100%;
            background-image: url('../img/vitor_rangel_web_design_e_solucoes_digitais_niteroi_rio_de_janeiro.jpeg');
            background-size: cover;
            background-position: center top;
            opacity: 100%; /* Sutil para não ofuscar o texto, mix com o fundo escuro */
            mix-blend-mode: luminosity; /* Adapta perfeitamente as cores usando a luz do fundo dark */
            z-index: -2;
            mask-image: linear-gradient(to top right, transparent 30%, rgb(0, 0, 0) 100%);
            -webkit-mask-image: linear-gradient(to top right, transparent 50%, rgb(52, 52, 52) 100%);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 3rem;
            align-items: center;
        }

        @media (min-width: 992px) {
            .hero-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero::before {
                width: 60%; /* Ocupa apenas o lado direito em telas maiores */
                mask-image: linear-gradient(to right, transparent 0%, black 100%);
                -webkit-mask-image: linear-gradient(to right, transparent 0%, black 100%);
                opacity: 0.3;
            }
        }

        .hero-cta {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-top: 2rem;
        }

        .hero-visuals {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        /* Footer */
        footer {
            border-top: 1px solid transparent;
            border-image: linear-gradient(
                to right,
                #01A5FE 0%,
                #0064AE 50%,
                #012951 100%
            ) 1;
            padding: 4rem 0 2rem;
            text-align: center;
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .social-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            color: var(--text-heading);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .social-icon:hover {
            background-color: var(--text-heading);
            color: var(--bg-primary);
            transform: translateY(-4px);
        }

        .social-icon svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .copyright {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* =========================================================================
           ANIMAÇÕES DE ENTRADA (INTERSECTION OBSERVER)
           ========================================================================= */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .reveal.active {
            opacity: 1;
            transform: translateY(0);
        }

        .delay-100 { transition-delay: 100ms; }
        .delay-200 { transition-delay: 200ms; }
        .delay-300 { transition-delay: 300ms; }

/* Container Principal do Preloader */
        #preloader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background-color: var(--bg-primary);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            /* Transição suave quando for desaparecer */
            transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
        }

        /* Efeito de Mesh Glow no fundo (identidade visual do site) */
        #preloader::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
            border-radius: 50%;
            animation: pulseGlow 3s infinite alternate ease-in-out;
            z-index: -1;
            filter: blur(40px);
        }

        /* Estilo do Logo Central */
        .preloader-brand {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.03em;
            margin-bottom: 2.5rem;
        }

        /* Ponto Neon do Logo com animação */
        .logo-dot {
            width: 14px;
            height: 14px;
            background-color: var(--accent-cyan);
            border-radius: 50%;
            box-shadow: 0 0 15px var(--accent-cyan);
            animation: bounceDot 1.5s infinite ease-in-out;
        }

        /* Barra de Progresso Container */
        .progress-container {
            width: 250px;
            height: 3px;
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            overflow: hidden;
            position: relative;
        }

        /* Preenchimento ativo da barra */
        .progress-bar {
            height: 100%;
            width: 0%;
            background-color: var(--accent-cyan);
            border-radius: 10px;
            box-shadow: 0 0 12px var(--accent-cyan);
            transition: width 0.15s ease-out;
        }

        /* Texto de Feedback */
        .loading-text {
            margin-top: 1.5rem;
            color: var(--text-muted);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            animation: pulseText 2s infinite alternate;
        }

        /* Máscara de Ocultação */
        .preloader-hidden {
            opacity: 0 !important;
            visibility: hidden !important;
            transform: scale(1.05); /* Leve expansão antes de sumir */
        }

        /* Animações Keyframes */
        @keyframes pulseGlow {
            0% { transform: scale(0.9); opacity: 0.6; }
            100% { transform: scale(1.2); opacity: 1; }
        }

        @keyframes bounceDot {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-7px) scale(1.1); box-shadow: 0 0 25px var(--accent-cyan); }
        }

        @keyframes pulseText {
            0% { opacity: 0.6; }
            100% { opacity: 1; }
        }

        @keyframes animateGradient {
            0% { background-position: 0% center; }
            100% { background-position: 200% center; }
        }

        /* ========================================================
           Apenas para demonstrar a página por trás do preloader
           ======================================================== */
        .content-demo {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            height: 100vh;
            text-align: center;
            padding: 2rem;
            opacity: 0;
            transition: opacity 1s ease 0.6s; /* Aparece com atraso após preloader sair */
        }

        .content-demo h1 {
            color: var(--text-heading);
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.04em;
        }

        .content-demo p {
            color: var(--text-muted);
            font-size: 1.125rem;
            max-width: 600px;
        }

        .content-loaded {
            opacity: 1;
        }

        /* =========================================================================
           RESPONSIVO MÓVEL EXTRA
           ========================================================================= */
        @media (max-width: 768px) {
            /* Ocultar o botão "Entre em contato" no cabeçalho em celulares */
            #header .btn {
                display: none !important;
            }
            
            /* Centralizar container (opcional para dar foco na logo) e reduzir tamanho */
            #header .nav-container {
                justify-content: center;
            }
            
            #header .logo img {
                max-height: 30px !important;
            }

            /* Fazer a imagem de fundo da Hero aparecer mais no mobile */
            .hero::before {
                -webkit-mask-image: linear-gradient(to top right, transparent 5%, rgb(52, 52, 52) 100%);
                mask-image: linear-gradient(to top right, transparent 5%, rgb(0, 0, 0) 100%);
                opacity: 0.85; /* Garante que ela está com uma boa opacidade */
            }

            /* Ajustes da Hero no Mobile: abaixar o conteúdo e centralizar tudo */
            .hero {
                padding-top: 19rem; /* Abaixa o conteúdo consideravelmente para a foto brilhar no topo */
            }
            .hero-content {
                text-align: center;
            }
            .hero-content p {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-cta {
                justify-content: center;
            }
        }