* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f4f6f9;
            color: #333;
        }

                /* --- NOVO DESIGN DO HEADER E NAVBAR (SETHSISTEMAS) --- */
        .main-header {
            background-color: #1e293b;
            color: white;
            padding: 25px 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid #334155;
        }

        /* Agrupamento do Logo + Nome */
        .header-brand {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .header-logo {
            width: 145px;
            height: 145px;
            object-fit: cover;
            border-radius: 6px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        /* Nome em duas cores: Seth (Branco) e Sistemas (Azul Celeste) */
        .brand-name {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.5px;
        }

        .brand-name span {
            color: #38bdf8;
        }

        .header-tagline {
            font-size: 0.95rem;
            color: #94a3b8;
            font-style: italic;
        }

        /* Navbar Escura */
        .main-nav {
            background-color: #0f172a;
            padding: 12px 40px;
            display: flex;
            justify-content: flex-end; /* Força todo o conteúdo para a direita */
            align-items: center;
            border-bottom: 3px solid #38bdf8;
        }

        /* Recipiente dos links e botão alinhados juntos */
        .nav-container-right {
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .nav-links {
            display: flex;
            gap: 20px;
        }

        .main-nav a {
            color: #f8fafc;
            text-decoration: none;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.3px;
            transition: color 0.2s;
        }

        .main-nav a:hover {
            color: #38bdf8;
        }

        /* Botão Login Ajustado */
        .btn-login-nav {
            background-color: #38bdf8;
            color: #0f172a;
            padding: 9px 20px;
            border: none;
            border-radius: 5px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: background-color 0.2s, transform 0.1s;
        }

        .btn-login-nav:hover {
            background-color: #0284c7;
            color: white;
        }

        .btn-login-nav:active {
            transform: scale(0.98);
        }

        /* Ajuste de Responsividade para Celulares */
        @media (max-width: 600px) {
            .main-header { padding: 20px; }
            .brand-name { font-size: 2rem; }
            .main-nav { justify-content: center; padding: 15px 20px; }
            .nav-container-right { flex-direction: column; gap: 15px; }
        }


        header {
            background-color: #1e293b;
            color: white;
            padding: 20px;
            text-align: center;
        }

        header h1 {
            font-size: 2.5rem;
            color: #38bdf8;
        }

        nav {
            background-color: #0f172a;
            padding: 10px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .nav-links {
            display: flex;
            gap: 15px;
            margin: 0 auto;
        }

        nav a {
            color: white;
            text-decoration: none;
            font-weight: bold;
        }

        nav a:hover {
            color: #38bdf8;
        }

        .btn-login-nav {
            background-color: #38bdf8;
            color: white;
            padding: 8px 16px;
            border: none;
            border-radius: 4px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.2s;
        }

        .btn-login-nav:hover {
            background-color: #0284c7;
        }

        .container {
            display: flex;
            max-width: 1400px;
            margin: 20px auto;
            padding: 0 20px;
            gap: 20px;
        }

        .sidebar {
            flex: 1;
            min-width: 250px;
            max-width: 300px;
            background-color: white;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            height: fit-content;
        }

        .main-content {
            flex: 2;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .section-title {
            font-size: 1.5rem;
            border-bottom: 2px solid #38bdf8;
            padding-bottom: 5px;
            margin-bottom: 15px;
            color: #1e293b;
        }

        .systems-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .card {
            background-color: white;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            border-top: 4px solid #38bdf8;
            transition: transform 0.2s;
        }

        .card:hover {
            transform: translateY(-5px);
        }

        .card h3 {
            margin-bottom: 10px;
            color: #0f172a;
        }

        .card p {
            font-size: 0.9rem;
            color: #64748b;
            margin-bottom: 15px;
            line-height: 1.4;
        }

        .price {
            font-size: 1.25rem;
            font-weight: bold;
            color: #10b981;
            margin-bottom: 15px;
        }

        .btn {
            display: inline-block;
            background-color: #38bdf8;
            color: white;
            padding: 10px 15px;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            text-align: center;
            width: 100%;
        }

        .btn:hover {
            background-color: #0284c7;
        }

        .news-section {
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        }

        .news-placeholder {
            background: #f8fafc;
            border: 2px dashed #cbd5e1;
            padding: 20px;
            text-align: center;
            color: #94a3b8;
            border-radius: 6px;
        }

        .ad-box {
            background: #f8fafc;
            border: 2px dashed #cbd5e1;
            padding: 40px 15px;
            text-align: center;
            color: #94a3b8;
            border-radius: 6px;
            margin-bottom: 15px;
        }

        footer {
            background-color: #0f172a;
            color: white;
            text-align: center;
            padding: 20px;
            margin-top: 40px;
        }

        /* ESTILOS EXCLUSIVOS DA MODAL */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .modal-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        .modal-content-box {
            background-color: white;
            padding: 30px;
            border-radius: 8px;
            width: 100%;
            max-width: 400px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
            position: relative;
            transform: translateY(-20px);
            transition: transform 0.3s ease;
        }

        .modal-overlay.active .modal-content-box {
            transform: translateY(0);
        }

        .close-modal {
            position: absolute;
            top: 15px;
            right: 15px;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: #64748b;
            cursor: pointer;
        }

        .close-modal:hover {
            color: #1e293b;
        }

        #login-box h3 {
            color: #0284c7;
            text-align: center;
            margin-bottom: 20px;
            font-size: 1.8rem;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group label {
            display: block;
            margin-bottom: 5px;
            color: #1e293b;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 10px;
            border: 1px solid #cbd5e1;
            border-radius: 4px;
            font-size: 1.1rem;
        }

        .form-control:focus {
            outline: none;
            border-color: #38bdf8;
            box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
        }

        .mt-4 {
            margin-top: 25px;
        }

        .btn-info {
            width: 100%;
            background-color: #0284c7;
            color: white;
            padding: 12px;
            border: none;
            border-radius: 4px;
            font-size: 1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.2s;
        }

        .btn-info:hover {
            background-color: #0369a1;
        }

        @media (max-width: 1024px) {
            .container { flex-direction: column; }
            .sidebar { max-width: 100%; width: 100%; }
        }
          /* Estilos para os Cards Dinâmicos do Mercado Livre */
        .product-ad-card {
            background-color: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: 6px;
            padding: 12px;
            margin-bottom: 15px;
            text-align: center;
            box-shadow: 0 2px 4px rgba(0,0,0,0.02);
            transition: box-shadow 0.2s;
        }

        .product-ad-card:hover {
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
        }

        .product-ad-img {
            max-width: 100%;
            height: 120px;
            object-fit: contain;
            background-color: white;
            border-radius: 4px;
            margin-bottom: 10px;
        }

        .product-ad-title {
            font-size: 0.85rem;
            color: #1e293b;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;  
            overflow: hidden;
            text-overflow: ellipsis;
            height: 34px;
            line-height: 1.3;
        }

        .product-ad-price {
            font-size: 1.1rem;
            font-weight: bold;
            color: #1e293b;
            margin-bottom: 10px;
        }

        .product-ad-btn {
            display: block;
            background-color: #fff159; /* Amarelo característico do Mercado Livre */
            color: #333;
            text-decoration: none;
            font-size: 0.8rem;
            font-weight: bold;
            padding: 8px 10px;
            border-radius: 4px;
            transition: background 0.2s;
        }

        .product-ad-btn:hover {
            background-color: #e6d84f;
        }
        /* --- ESTILOS PARA OS CARDS DE VEÍCULOS (LADO DIREITO) --- */
        .vehicle-ad-card {
            background-color: white;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            overflow: hidden;
            margin-bottom: 20px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        /* Efeito flutuante ao passar o mouse */
        .vehicle-ad-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
        }

        /* Força a imagem a preencher o espaço mantendo a proporção correta */
        .vehicle-ad-img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            display: block;
            background-color: #f1f5f9;
        }

        /* Espaçamento interno dos textos */
        .vehicle-ad-info {
            padding: 15px;
        }

        /* Texto pequeno acima com o fabricante/marca */
        .vehicle-brand {
            font-size: 0.75rem;
            text-transform: uppercase;
            color: #38bdf8;
            font-weight: bold;
            display: block;
            margin-bottom: 3px;
            letter-spacing: 0.5px;
        }

        /* Nome do modelo do veículo */
        .vehicle-model {
            font-size: 1rem;
            color: #1e293b;
            margin-bottom: 6px;
            font-weight: 600;
        }

        /* Informações secundárias (ano e quilometragem) */
        .vehicle-year {
            font-size: 0.85rem;
            color: #64748b;
            margin-bottom: 4px;
        }

        /* Localização com o ícone de pin */
        .vehicle-geo {
            font-size: 0.8rem;
            color: #64748b;
            margin-bottom: 12px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* Preço destacado em verde escuro ou preto */
        .vehicle-price {
            font-size: 1.25rem;
            font-weight: bold;
            color: #0f172a;
            margin-bottom: 15px;
        }

        /* Botão estilizado para abrir os detalhes do carro */
        .vehicle-btn {
            display: block;
            background-color: #1e293b;
            color: white;
            text-align: center;
            text-decoration: none;
            font-size: 0.85rem;
            font-weight: bold;
            padding: 10px;
            border-radius: 5px;
            transition: background 0.2s;
        }

        /* Efeito de cor ao passar o mouse no botão */
        .vehicle-btn:hover {
            background-color: #38bdf8;
            color: white;
        }

        /* --- ESTILOS EXCLUSIVOS DA SEÇÃO DE CONTATO (CENTRO) --- */
        .contact-box {
            background-color: white;
            border-radius: 8px;
            padding: 25px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            border-top: 4px solid #1e293b;
        }

        .contact-text {
            color: #64748b;
            font-size: 0.95rem;
            margin-bottom: 20px;
            line-height: 1.5;
        }

        .contact-channels {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 15px;
            background-color: #f8fafc;
            padding: 12px 15px;
            border-radius: 6px;
            border: 1px solid #e2e8f0;
            transition: background-color 0.2s;
        }

        .contact-item:hover {
            background-color: #f1f5f9;
        }

        .contact-icon {
            font-size: 1.6rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .contact-info strong {
            display: block;
            font-size: 0.85rem;
            color: #1e293b;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 2px;
        }

        .contact-link {
            color: #0284c7;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            transition: color 0.2s;
        }

        .contact-link:hover {
            text-decoration: underline;
            color: #38bdf8;
        }

        /* --- ESTILOS DO BOTÃO FLUTUANTE DO WHATSAPP (CANTO DIREITO) --- */
        .whatsapp-floating-btn {
            position: fixed;
            bottom: 25px;
            right: 25px;
            width: 60px;
            height: 60px;
            background-color: #25d366;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
            z-index: 9999;
            transition: transform 0.2s, background-color 0.2s;
        }

        /* Efeito de aumentar levemente ao passar o mouse */
        .whatsapp-floating-btn:hover {
            transform: scale(1.1);
            background-color: #20ba5a;
        }

        /* Desenho vetorial interno do ícone */
        .whatsapp-svg {
            width: 35px;
            height: 35px;
            fill: white;
        }

        /* Ajuste responsivo para não sobrepor conteúdos em celulares */
        @media (max-width: 768px) {
            .whatsapp-floating-btn {
                bottom: 20px;
                right: 20px;
                width: 50px;
                height: 50px;
            }
            .whatsapp-svg {
                width: 28px;
                height: 28px;
            }
        }