:root {
    --azul-marino: #002D5B;
    --blanco: #ffffff;
    --negro: #1a1a1a;
    --gris-suave: #f4f4f4;
    --verde-whatsapp: #25d366;
}

/* Estructura Global para empujar el footer al fondo */
* { margin: 0; padding: 0; box-sizing: border-box; scroll-behavior: smooth; }
body { 
    font-family: 'Montserrat', sans-serif; 
    line-height: 1.6; 
    color: var(--negro); 
    display: flex; 
    flex-direction: column; 
    min-height: 100vh; 
}
main { flex: 1; }

/* Navegación y Menú Móvil */
.navbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 5%; background: var(--blanco);
    position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.logo img { height: 40px; width: auto; }
.menu-toggle { display: none; flex-direction: column; cursor: pointer; gap: 5px; }
.menu-toggle span { width: 25px; height: 3px; background: var(--azul-marino); transition: 0.3s; }

.nav-links { display: flex; gap: 25px; list-style: none; align-items: center; }
.nav-links a { text-decoration: none; color: var(--negro); font-weight: 700; font-size: 0.8rem; }

/* Botones y Secciones */
.btn { padding: 12px 25px; border-radius: 4px; text-decoration: none; font-weight: 700; display: inline-block; text-transform: uppercase; font-size: 0.85rem; border: none; transition: 0.3s; }
.btn-azul { background: var(--azul-marino); color: var(--blanco); }
.btn-blanco { background: var(--blanco); color: var(--azul-marino); }
.btn-whatsapp { background: var(--verde-whatsapp); color: var(--blanco); }

/* Footer */
footer { background: var(--negro); color: var(--blanco); padding: 40px 10%; text-align: center; }
footer a { color: #ccc; text-decoration: none; margin: 0 10px; font-size: 0.8rem; }

/* Mobile */
@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .nav-links {
        display: none; flex-direction: column; position: absolute;
        top: 70px; left: 0; width: 100%; background: var(--blanco);
        padding: 20px; box-shadow: 0 10px 10px rgba(0,0,0,0.1);
    }
    .nav-links.active { display: flex; }
}