:root {
        --primary-color: #000000;
        --secondary-color: #ffffff;
        --accent-color: #333333;
        --gray-dark: #0a0a0a;
        --gray-medium: #1a1a1a;
        --gray-light: #2a2a2a;
        --interactiva-blue: #0066cc;
        --interactiva-dark: #004499;
        --gradient-primary: linear-gradient(135deg, var(--interactiva-blue) 0%, var(--interactiva-dark) 100%);
        --gradient-dark: linear-gradient(135deg, var(--gray-dark) 0%, var(--primary-color) 100%);
    }

    body {
        background-color: var(--primary-color);
        color: var(--secondary-color);
        font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        line-height: 1.7;
    }

    /* Navigation */
    .navbar {
        background-color: var(--primary-color) !important;
        padding: 1rem 0;
        box-shadow: 0 2px 30px rgba(0,0,0,0.5);
        backdrop-filter: blur(20px);
        transition: all 0.4s ease;
    }

    .navbar-scrolled {
        background-color: rgba(0, 0, 0, 0.95) !important;
        padding: 0.7rem 0;
    }

    .nav-link {
        font-weight: 500;
        margin: 0 0.5rem;
        transition: all 0.3s ease;
        position: relative;
    }

    .nav-link::after {
        content: '';
        position: absolute;
        bottom: -5px;
        left: 50%;
        width: 0;
        height: 2px;
        background: var(--gradient-primary);
        transition: all 0.3s ease;
        transform: translateX(-50%);
    }

    .nav-link:hover::after {
        width: 100%;
    }

    /* Hero Produto Melhorado */
    .produto-hero {
        background: var(--gradient-dark), 
                   url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80') no-repeat center center/cover;
        padding: 140px 0 80px;
        margin-top: 76px;
        position: relative;
        overflow: hidden;
    }

    .produto-hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--gradient-primary);
        opacity: 0.1;
        z-index: 1;
    }

    .produto-hero > .container {
        position: relative;
        z-index: 2;
    }

    .produto-icone {
        font-size: 5rem;
        margin-bottom: 2rem;
        display: inline-block;
        background: var(--gradient-primary);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        filter: drop-shadow(0 4px 8px rgba(0,102,204,0.3));
        transition: all 0.3s ease;
    }

    .produto-titulo {
        font-size: 3.5rem;
        font-weight: 800;
        line-height: 1.2;
        margin-bottom: 1.5rem;
        background: linear-gradient(45deg, #fff, #e0e0e0, var(--interactiva-blue));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .produto-destaque {
        background: rgba(0,102,204,0.1);
        border: 1px solid rgba(0,102,204,0.3);
        border-radius: 15px;
        padding: 1rem 1.5rem;
        display: inline-block;
        margin-bottom: 2rem;
        font-weight: 600;
        color: var(--interactiva-blue);
    }

    /* Cards Melhorados */
    .feature-card {
        background: var(--gradient-dark);
        border: 1px solid var(--gray-light);
        border-radius: 20px;
        padding: 2.5rem;
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        height: 100%;
        position: relative;
        overflow: hidden;
    }

    .feature-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(0,102,204,0.1), transparent);
        transition: left 0.6s ease;
    }

    .feature-card:hover::before {
        left: 100%;
    }

    .feature-card:hover {
        transform: translateY(-8px);
        border-color: var(--interactiva-blue);
        box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    }

    .beneficio-item {
        background: rgba(0, 102, 204, 0.1);
        border: 1px solid rgba(0, 102, 204, 0.3);
        border-radius: 12px;
        padding: 1.2rem;
        margin-bottom: 1rem;
        transition: all 0.3s ease;
        border-left: 4px solid var(--interactiva-blue);
    }

    .beneficio-item:hover {
        background: rgba(0, 102, 204, 0.15);
        transform: translateX(5px);
    }

    /* Info Cards */
    .info-card {
        background: var(--gradient-dark);
        border: 1px solid var(--gray-light);
        border-radius: 15px;
        padding: 1.5rem;
        text-align: center;
        transition: all 0.3s ease;
    }

    .info-card:hover {
        border-color: var(--interactiva-blue);
        transform: translateY(-5px);
    }

    .info-card i {
        font-size: 2rem;
        color: var(--interactiva-blue);
        margin-bottom: 1rem;
    }

    /* Buttons Melhorados */
    .btn-interactiva {
        background: var(--gradient-primary);
        border: none;
        color: white;
        padding: 15px 35px;
        font-weight: 600;
        border-radius: 12px;
        transition: all 0.3s ease;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 10px;
        position: relative;
        overflow: hidden;
    }

    .btn-interactiva::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
        transition: left 0.5s ease;
    }

    .btn-interactiva:hover::before {
        left: 100%;
    }

    .btn-interactiva:hover {
        transform: translateY(-3px);
        box-shadow: 0 15px 30px rgba(0,102,204,0.4);
        color: white;
    }

    .btn-outline-light {
        border: 2px solid #ffffff;
        color: #ffffff;
        background: transparent;
        padding: 15px 35px;
        font-weight: 600;
        border-radius: 12px;
        transition: all 0.3s ease;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 10px;
    }

    .btn-outline-light:hover {
        background: #ffffff;
        color: var(--primary-color);
        transform: translateY(-3px);
    }

    /* List Styles */
    .feature-list {
        list-style: none;
        padding: 0;
    }

    .feature-list li {
        padding: 0.8rem 0;
        border-bottom: 1px solid var(--gray-light);
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    .feature-list li:last-child {
        border-bottom: none;
    }

    .feature-list i {
        color: var(--interactiva-blue);
        font-size: 1.2rem;
    }

    /* Progress Bar de Navegação */
    .reading-progress {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: transparent;
        z-index: 1000;
    }

    .reading-progress-bar {
        height: 100%;
        background: var(--gradient-primary);
        width: 0%;
        transition: width 0.3s ease;
        box-shadow: 0 0 10px var(--interactiva-blue);
    }

    /* Botão Voltar ao Topo */
    .back-to-top {
        position: fixed;
        bottom: 30px;
        right: 30px;
        background: var(--gradient-primary);
        color: white;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1000;
        box-shadow: 0 5px 20px rgba(0,102,204,0.4);
    }

    .back-to-top.show {
        opacity: 1;
        visibility: visible;
    }

    .back-to-top:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 25px rgba(0,102,204,0.6);
    }

    /* Responsive */
    @media (max-width: 768px) {
        .produto-hero {
            padding: 120px 0 60px;
            margin-top: 66px;
        }

        .produto-titulo {
            font-size: 2.5rem;
        }

        .produto-icone {
            font-size: 4rem;
        }

        .feature-card {
            padding: 2rem;
        }
    }

    .logo-image {
        height: 40px;
        width: auto;
        transition: transform 0.3s ease;
    }

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

    @media (max-width: 768px) {
        .logo-image {
            height: 35px;
        }
        
        .brand-text {
            font-size: 1.1rem;
        }
    }

    /* Animações */
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(30px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .fade-in-up {
        animation: fadeInUp 0.6s ease-out;
    }