/* 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; }
        /* --- HERANÇA DO DESIGN SYSTEM (Do seu index.html) --- */
        :root {
            --primary: #0A4D68;        
            --primary-dark: #06384d;
            --accent: #047857;         
            --secondary: #D97706;      
            --bg-body: #FAFAF9;        
            --bg-card: #FFFFFF;
            --text-main: #1C1917;      
            --text-muted: #57534E;     
            --border-subtle: #E7E5E4;  
            --container-width: 1200px;
            --header-height: 90px;
            
            /* Cores Específicas do IMC (Gradiente de Risco) */
            --imc-under: #3b82f6;   /* Abaixo do peso */
            --imc-normal: #10b981;  /* Normal */
            --imc-over: #f59e0b;    /* Sobrepeso */
            --imc-obese1: #f97316;  /* Obesidade 1 */
            --imc-obese2: #ef4444;  /* Obesidade 2 */
            --imc-obese3: #b91c1c;  /* Obesidade 3 */
            
            /* Cores para calculadoras */
            --bg-calc-item: #FFFFFF;
            --bg-calc-item-hover: #FAFAF9;
            --border-calc: #E7E5E4;
        }

        [data-theme="dark"] {
            --bg-body: #0C0A09;
            --bg-card: #1C1917;
            --text-main: #F5F5F4;
            --text-muted: #A8A29E;
            --primary: #38BDF8;
            --accent: #34D399;
            --border-subtle: #292524;
            
            --bg-calc-item: #292524; 
            --bg-calc-item-hover: #44403C; 
            --border-calc: #44403C;
        }

        * { 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 (Copiadas do index) --- */
        @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 COMPLETO --- */
        .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); /* Diferença: No index é transparente, aqui precisa ser sólido pois não tem Hero Image Full */
            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); /* Cor ajustada 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;
        }

        /* --- TOOL HERO SECTION --- */
        .tool-hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            padding: 60px 0 100px; /* Padding bottom extra para o card sobrepor */
            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(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2);
            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;
        }

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

        /* CARD DA CALCULADORA */
        .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(--secondary);
        }

        .input-group { margin-bottom: 25px; position: relative; }
        .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 {
            width: 100%; padding: 15px 15px 15px 45px;
            border: 1px solid var(--border-subtle); border-radius: 4px;
            font-size: 1.1rem; font-family: 'Source Sans 3', sans-serif;
            background-color: var(--bg-body); color: var(--text-main);
            transition: 0.3s;
        }
        .form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(10, 77, 104, 0.1); }
        
        .radio-group { display: flex; gap: 20px; margin-top: 10px; }
        .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;
        }
        .radio-option input:checked + .radio-tile {
            background-color: rgba(10, 77, 104, 0.1); border-color: var(--primary); color: var(--primary);
        }

        .btn-calc {
            width: 100%; background-color: var(--primary); color: #fff;
            border: none; padding: 18px; font-size: 1.1rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
            border-radius: 4px; cursor: pointer; transition: 0.3s; display: flex; justify-content: center; gap: 10px;
        }
        .btn-calc:hover { background-color: var(--secondary); transform: translateY(-2px); box-shadow: 0 10px 20px rgba(0,0,0,0.15); }

        /* RESULTADO */
        .result-container {
            display: none; /* Escondido inicialmente */
            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;
        }
        
        /* Faixa lateral colorida dinâmica */
        .result-box::before {
            content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 6px;
            background-color: var(--imc-color, #ccc);
        }

        .imc-number {
            font-size: 4rem; font-family: 'Playfair Display', serif; font-weight: 700;
            line-height: 1; margin: 10px 0; color: var(--imc-color, var(--primary));
        }
        .imc-status {
            font-size: 1.5rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
            color: var(--imc-color, var(--text-main)); margin-bottom: 20px;
        }

        /* Barra Visual do IMC */
        .imc-visual-bar {
            height: 12px; background: linear-gradient(to right, 
                var(--imc-under) 0%, var(--imc-under) 18.5%, 
                var(--imc-normal) 18.5%, var(--imc-normal) 25%, 
                var(--imc-over) 25%, var(--imc-over) 30%, 
                var(--imc-obese1) 30%, var(--imc-obese3) 100%);
            border-radius: 10px; margin: 30px 0 10px; position: relative;
        }
        .imc-marker {
            position: absolute; top: -8px; width: 4px; height: 28px; background-color: #000;
            border: 2px solid #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.3);
            transition: left 1s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            transform: translateX(-50%);
        }
        .imc-labels { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--text-muted); margin-top: 5px; }

        .health-advice {
            background-color: var(--bg-body); padding: 20px; border-radius: 4px;
            text-align: left; margin-top: 25px; border-left: 3px solid var(--text-muted);
        }
        .health-advice h4 { font-size: 1.1rem; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }

        .share-actions {
            margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--border-subtle);
        }
        .share-text { font-size: 0.9rem; margin-bottom: 15px; color: var(--text-muted); }
        .share-buttons { display: flex; gap: 10px; justify-content: center; }
        .btn-share {
            border: 1px solid var(--border-subtle); background: transparent; padding: 8px 16px;
            border-radius: 50px; cursor: pointer; display: flex; align-items: center; gap: 8px;
            font-size: 0.85rem; font-weight: 600; transition: 0.2s; color: var(--text-main);
        }
        .btn-share.whatsapp:hover { border-color: #25D366; color: #25D366; background: rgba(37, 211, 102, 0.05); }
        .btn-share.copy:hover { border-color: var(--primary); color: var(--primary); }

        /* --- CONTEÚDO EDUCACIONAL --- */
        .content-section { margin-bottom: 60px; }
        .content-section p { margin-bottom: 15px; font-size: 1.05rem; color: var(--text-muted); }
        
        .table-responsive { width: 100%; overflow-x: auto; margin: 30px 0; border-radius: 4px; border: 1px solid var(--border-subtle); }
        .imc-table { width: 100%; border-collapse: collapse; min-width: 500px; }
        .imc-table th, .imc-table td { padding: 15px; text-align: left; border-bottom: 1px solid var(--border-subtle); }
        .imc-table th { background-color: var(--bg-body); color: var(--primary); font-family: 'Playfair Display', serif; }
        .imc-table tr:last-child td { border-bottom: none; }
        
        .limitations-box {
            background-color: rgba(217, 119, 6, 0.05); border: 1px solid rgba(217, 119, 6, 0.2);
            padding: 30px; border-radius: 4px; margin-top: 40px;
        }
        .limitations-box h3 { color: var(--secondary); display: flex; align-items: center; gap: 10px; }

        /* --- FOOTER COMPLETO --- */
        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; }
            .tool-hero { padding-bottom: 40px; }
            .imc-number { font-size: 3rem; }
            .nav-menu { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
        }