/* ==========================================
   VARIABLES DE COLORES CORPORATIVOS AVCA GROUP
=========================================== */
:root {
    --azul-marino: #1C1C4E;
    --cyan: #00AEEF;
    --purpura: #9E1B81;
    --blanco: #FFFFFF;
    --gris-claro: #F4F4F9;
}

/* Configuraciones generales */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
    scroll-behavior: smooth;
}

/* ==========================================
   ESTILOS DEL MENÚ DE NAVEGACIÓN (ESCRITORIO)
=========================================== */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 50px;
    background-color: var(--blanco);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.logo {
    height: 50px;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--azul-marino);
    font-weight: 600;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--cyan);
}

.btn-nav {
    background-color: var(--purpura);
    color: var(--blanco) !important;
    padding: 10px 20px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.btn-nav:hover {
    background-color: var(--azul-marino);
}

/* ==========================================
   BOTÓN HAMBURGUESA (OCULTO EN COMPUTADORAS)
=========================================== */
.menu-toggle {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--azul-marino);
    transition: 0.3s;
}

/* ==========================================
   ESTILOS DE LA PORTADA (HERO SECTION)
=========================================== */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(28, 28, 78, 0.8), rgba(28, 28, 78, 0.8)), url('https://images.unsplash.com/photo-1494412651409-8963ce7935a7?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover;
    color: var(--blanco);
    padding: 0 20px;
    margin-top: 60px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--cyan);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.btn-principal {
    text-decoration: none;
    background-color: var(--cyan);
    color: var(--blanco);
    padding: 15px 30px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 5px;
    transition: transform 0.3s, background-color 0.3s;
    display: inline-block;
}

.btn-principal:hover {
    background-color: var(--purpura);
    transform: translateY(-3px);
}

/* ==========================================
   ESTILOS SECCIONES GENERALES
=========================================== */
.seccion {
    padding: 80px 20px;
    background-color: var(--blanco);
}

.seccion-gris {
    background-color: var(--gris-claro);
}

.contenedor {
    max-width: 1200px;
    margin: 0 auto;
}

.titulo-seccion {
    text-align: center;
    color: var(--azul-marino);
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.texto-central {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px auto;
    color: #555;
    line-height: 1.6;
    font-size: 1.1rem;
}

/* ==========================================
   ESTILOS QUIÉNES SOMOS
=========================================== */
.grid-dos-columnas {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 50px;
}

.tarjeta-info {
    background-color: var(--gris-claro);
    padding: 30px;
    border-radius: 8px;
    border-top: 4px solid var(--cyan);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

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

.tarjeta-info h3 {
    color: var(--azul-marino);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.tarjeta-info p {
    color: #444;
    line-height: 1.6;
}

.formula-exito {
    background-color: var(--azul-marino);
    color: var(--blanco);
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.formula-exito h3 {
    color: var(--cyan);
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.ecuacion {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--purpura);
    margin-bottom: 15px;
    background-color: rgba(255,255,255,0.1);
    padding: 15px;
    border-radius: 5px;
}

.texto-formula {
    font-size: 1rem;
    color: #DDD;
}

/* ==========================================
   ESTILOS TARJETAS DE SERVICIOS
=========================================== */
.grid-servicios {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.tarjeta-servicio {
    background-color: var(--blanco);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border-bottom: 4px solid var(--azul-marino);
}

.tarjeta-servicio:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.icono-servicio {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.tarjeta-servicio h3 {
    color: var(--azul-marino);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.tarjeta-servicio p {
    color: #555;
    font-size: 0.95rem;
    line-height: 1.6;
}

.destacado-bosefo {
    border-bottom: 4px solid #FFD700;
}

.destacado-tributario {
    border-bottom: 4px solid var(--purpura);
}

/* ==========================================
   ESTILOS CONTACTO Y FOOTER
=========================================== */
.grid-contacto {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.tarjeta-contacto {
    background-color: var(--blanco);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    text-decoration: none;
    color: var(--azul-marino);
    border: 2px solid #25D366;
    transition: transform 0.3s, background-color 0.3s;
}

.tarjeta-contacto:hover {
    transform: translateY(-5px);
    background-color: #f0fff4;
}

.icono-whatsapp {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.tarjeta-contacto h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.tarjeta-contacto p {
    color: #666;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.tarjeta-contacto strong {
    font-size: 1.3rem;
    color: #25D366;
}

.footer {
    background-color: var(--azul-marino);
    color: var(--blanco);
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
}

/* ==========================================
   RESPONSIVIDAD PARA CELULARES Y TABLETS (LA CLAVE)
=========================================== */
@media (max-width: 768px) {
    .navbar {
        padding: 15px 20px;
        flex-direction: row; /* Fuerza a que el logo y el botón estén alineados horizontalmente */
    }
    
    .menu-toggle {
        display: flex; /* Muestra las 3 rayitas */
    }
    
    .nav-links {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--blanco);
        flex-direction: column;
        text-align: center;
        box-shadow: 0 10px 10px rgba(0,0,0,0.1);
        padding: 20px 0;
        display: none; /* Lo oculta hasta que se presione el botón */
    }
    
    .nav-links li {
        margin: 15px 0;
    }
    
    .nav-links.active {
        display: flex; /* La clase que el JavaScript usa para mostrarlo */
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .grid-dos-columnas {
        grid-template-columns: 1fr;
    }
    
    .titulo-seccion {
        font-size: 2rem;
    }
    
    .ecuacion {
        font-size: 1.1rem;
    }
}