/* Skip link (acessibilidade) */
        .skip-link { position: absolute; top: -40px; left: 0; background: #0A4D68; color: #fff; padding: 8px 16px; z-index: 9999; font-size: 14px; border-radius: 0 0 4px 0; transition: top .2s; text-decoration: none; }
        .skip-link:focus { top: 0; }
        /* --- DESIGN SYSTEM (Herdado e Adaptado) --- */
        :root {
            --primary: #0A4D68;        
            --primary-dark: #06384d;
            --accent: #047857;         
            --secondary: #D97706; /* Cor de destaque para Energia/Calorias */     
            --bg-body: #FAFAF9;        
            --bg-card: #FFFFFF;
            --text-main: #1C1917;      
            --text-muted: #57534E;     
            --border-subtle: #E7E5E4;  
            --container-width: 1200px;
            --header-height: 90px;
            
            /* Cores Específicas TMB */
            --calorie-burn: #ea580c; /* Laranja queimado para fogo/metabolismo */
            --calorie-gain: #16a34a;
            --calorie-loss: #2563eb;
        }

        [data-theme="dark"] {
            --bg-body: #0C0A09;
            --bg-card: #1C1917;
            --text-main: #F5F5F4;
            --text-muted: #A8A29E;
            --primary: #38BDF8;
            --accent: #34D399;
            --border-subtle: #292524;
        }

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

        body {
            font-family: 'Source Sans 3', sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            transition: background-color 0.5s ease, color 0.5s ease;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: 'Playfair Display', serif;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
        }

        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        a { text-decoration: none; color: inherit; transition: 0.3s ease; }
        ul { list-style: none; }

        /* --- ANIMAÇÕES --- */
        @keyframes rotate-scale {
            0% { transform: rotate(0) scale(1); }
            50% { transform: rotate(180deg) scale(1.2); }
            100% { transform: rotate(360deg) scale(1); }
        }
        .animate-theme-switch i, .animate-theme-switch svg { animation: rotate-scale 0.5s ease-in-out; }

        /* --- HEADER & NAV (Idêntico ao Index) --- */
        .top-bar {
            background-color: #0A4D68;
            color: #fff;
            padding: 8px 0;
            font-size: 0.85rem;
            position: relative;
            z-index: 1002;
        }
        
        .top-bar .container {
            display: flex;
            justify-content: flex-end;
            gap: 20px;
            padding-right: 20px;
        }

        .lang-selector {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        .lang-selector select {
            background: transparent;
            color: #fff;
            border: none;
            font-size: 0.85rem;
            cursor: pointer;
            outline: none;
        }
        .lang-selector select option { color: #000; }

        .main-header {
            background-color: var(--bg-card); /* Fundo sólido para páginas internas */
            border-bottom: 1px solid var(--border-subtle);
            width: 100%;
            z-index: 1000;
            height: var(--header-height);
            position: sticky;
            top: 0;
        }

        .main-header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
            padding-left: 40px;
            padding-right: 40px;
        }

        .logo {
            font-family: 'Playfair Display', serif;
            font-size: 2rem;
            font-weight: 700; 
            color: var(--primary); /* Ajustado para fundo claro */
            display: flex;
            align-items: center;
            gap: 12px;
            letter-spacing: -0.03em;
        }

        .nav-menu { display: flex; gap: 32px; }
        .nav-link {
            font-family: 'Source Sans 3', sans-serif;
            font-weight: 600;
            color: var(--text-muted); /* Ajustado para fundo claro */
            font-size: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            position: relative;
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -4px;
            left: 0;
            background-color: var(--secondary);
            transition: width 0.3s;
        }
        .nav-link:hover::after { width: 100%; }
        .nav-link:hover { color: var(--primary); }

        .btn-outline-white {
            border: 1px solid var(--primary); /* Ajustado */
            color: var(--primary); /* Ajustado */
            padding: 8px 24px;
            border-radius: 2px;
            text-transform: uppercase;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.05em;
        }
        .btn-outline-white:hover {
            background-color: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* --- TOOL HERO (Estilo Energia) --- */
        .tool-hero {
            background: linear-gradient(135deg, var(--secondary) 0%, #92400e 100%); /* Gradiente Âmbar */
            color: #fff;
            padding: 60px 0 100px;
            text-align: center;
        }
        .tool-hero h1 { color: #fff; font-size: 3rem; margin-bottom: 15px; }
        .tool-hero p { max-width: 700px; margin: 0 auto; opacity: 0.9; font-size: 1.2rem; font-weight: 300; }
        .tool-badge {
            background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.3);
            padding: 5px 15px; border-radius: 50px; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em;
            display: inline-flex; align-items: center; gap: 8px; margin-bottom: 20px;
        }

        /* --- TOOL LAYOUT --- */
        .tool-layout {
            display: grid; grid-template-columns: 1fr 1fr; gap: 50px;
            margin-top: -60px; margin-bottom: 80px; align-items: start;
        }

        .calc-card {
            background-color: var(--bg-card); padding: 40px; border-radius: 4px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1); border-top: 5px solid var(--primary);
        }

        /* Form Elements */
        .input-group { margin-bottom: 20px; }
        .input-group label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 8px; color: var(--text-main); }
        .input-wrapper { position: relative; }
        .input-wrapper i { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--text-muted); }
        
        .form-control, .form-select {
            width: 100%; padding: 15px 15px 15px 45px;
            border: 1px solid var(--border-subtle); border-radius: 4px;
            font-size: 1.05rem; font-family: 'Source Sans 3', sans-serif;
            background-color: var(--bg-body); color: var(--text-main); transition: 0.3s;
        }
        .form-select { cursor: pointer; appearance: none; }
        .form-control:focus, .form-select:focus { border-color: var(--secondary); outline: none; box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.1); }

        .radio-group { display: flex; gap: 20px; margin-bottom: 25px; }
        .radio-option { flex: 1; position: relative; }
        .radio-option input { position: absolute; opacity: 0; cursor: pointer; }
        .radio-tile {
            display: flex; align-items: center; justify-content: center; gap: 10px;
            padding: 12px; border: 1px solid var(--border-subtle); border-radius: 4px;
            cursor: pointer; transition: 0.3s; font-weight: 600; color: var(--text-muted);
        }
        .radio-option input:checked + .radio-tile {
            background-color: rgba(217, 119, 6, 0.1); border-color: var(--secondary); color: var(--secondary);
        }

        .btn-calc {
            width: 100%; background-color: var(--primary); color: #fff;
            border: none; padding: 18px; font-size: 1.1rem; font-weight: 700; text-transform: uppercase;
            border-radius: 4px; cursor: pointer; transition: 0.3s; display: flex; justify-content: center; gap: 10px; margin-top: 10px;
        }
        .btn-calc:hover { background-color: var(--primary-dark); transform: translateY(-2px); }

        /* RESULT AREA */
        .result-container { display: none; animation: fadeIn 0.8s ease forwards; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

        .result-box {
            background-color: var(--bg-card); border: 1px solid var(--border-subtle);
            padding: 30px; border-radius: 4px; text-align: center; position: relative; overflow: hidden;
            margin-bottom: 25px;
        }
        .result-box::before {
            content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 6px; background-color: var(--secondary);
        }

        .tmb-value {
            font-size: 3.5rem; font-family: 'Playfair Display', serif; font-weight: 700;
            line-height: 1; margin: 15px 0 5px; color: var(--secondary);
        }
        .tmb-unit { font-size: 1rem; color: var(--text-muted); font-weight: 400; text-transform: uppercase; letter-spacing: 0.05em; }

        .strategies-grid {
            margin-top: 30px; display: grid; gap: 15px;
        }
        .strategy-card {
            background-color: var(--bg-body); padding: 15px 20px; border-radius: 4px;
            display: flex; justify-content: space-between; align-items: center; border-left: 3px solid transparent;
        }
        .strategy-card.maintain { border-color: var(--calorie-burn); }
        .strategy-card.lose { border-color: var(--calorie-loss); }
        .strategy-card.gain { border-color: var(--calorie-gain); }
        
        .strat-title { font-weight: 600; font-size: 0.9rem; color: var(--text-main); }
        .strat-val { font-weight: 700; font-size: 1.1rem; font-family: 'Playfair Display', serif; }

        /* CONTENT */
        .content-section { margin-top: 60px; }
        .info-box {
            background: rgba(10, 77, 104, 0.03); border-left: 4px solid var(--primary);
            padding: 25px; border-radius: 0 4px 4px 0; margin: 30px 0;
        }

        /* --- FOOTER (Idêntico ao Index) --- */
        footer {
            background-color: #1C1917;
            color: #A8A29E;
            padding: 80px 0 0;
            font-size: 0.95rem;
            font-family: 'Source Sans 3', sans-serif;
            border-top: 4px solid var(--accent);
        }
        
        .footer-grid {
            display: grid; 
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
            gap: 50px;
            padding-bottom: 60px;
        }

        .footer-grid h4 {
            color: #fff;
            font-family: 'Playfair Display', serif;
            font-size: 1.3rem;
            margin-bottom: 25px;
            letter-spacing: 0.05em;
            position: relative;
        }
        
        .footer-grid h4::after {
            content: '';
            display: block;
            width: 30px;
            height: 2px;
            background-color: var(--accent);
            margin-top: 10px;
        }
        
        .footer-grid ul li { margin-bottom: 12px; }
        .footer-grid ul li a { 
            color: #A8A29E; 
            transition: 0.2s;
            display: inline-block;
        }
        .footer-grid ul li a:hover { 
            color: #fff; 
            transform: translateX(5px); 
        }

        .footer-bottom {
            border-top: 1px solid #333;
            padding: 30px 0;
            text-align: center;
            font-size: 0.85rem;
            background-color: #151312; 
        }

        @media (max-width: 900px) {
            .tool-layout { grid-template-columns: 1fr; margin-top: 0; }
            .nav-menu { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
            .tmb-value { font-size: 2.8rem; }
            .hero h1 { font-size: 2.5rem; }
        }