/* ==========================================================================
   VARIABLES.CSS - Sistema de Diseño de NiechGlobal (Edición Corporativa)
   ========================================================================== */

:root {
    /* Paleta de Colores (Corporativo, Tecnológico y Premium) */
    --color-primary: #102A43;       /* Azul marino profundo (Finanzas/Auditoría) */
    --color-secondary: #1982C4;     /* Azul tecnológico (Servicios IT) */
    --color-accent: #D4AF37;        /* Dorado/Bronce premium (Transporte Ejecutivo) */
    --color-dark: #243E56;          /* Gris azulado oscuro para textos principales */
    --color-light: #F0F4F8;         /* Fondo claro y limpio para secciones alternativas */
    --color-white: #FFFFFF;
    --color-gray: #627D98;          /* Gris medio para textos secundarios o descripciones */
    
    /* Tipografía */
    --font-main: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    
    /* Transiciones suaves */
    --transition-fast: all 0.3s ease;
}

/* ==========================================================================
   ESTILOS BASE / REINICIO
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth; /* Desplazamiento fluido al usar los enlaces del menú */
}

body {
    font-family: var(--font-main);
    background-color: var(--color-white);
    color: var(--color-dark);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

/* Contenedor Global para centrar contenido */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Subtítulos globales de sección */
.section-subtitle {
    text-align: center;
    color: var(--color-gray);
    font-size: 16px;
    margin-top: 10px;
    margin-bottom: 50px;
}

/* ==========================================================================
   HEADER Y NAVEGACIÓN (MENÚ DESPLEGABLE)
   ========================================================================== */
header {
    background-color: var(--color-primary);
    color: var(--color-white);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 0 5%;
}

.logo {
    float: left;
    line-height: 70px;
    font-size: 22px;
    letter-spacing: 1px;
}

.logo span {
    color: var(--color-secondary);
}

nav {
    float: right;
}

nav > ul > li {
    float: left;
    position: relative;
}

nav a {
    display: block;
    padding: 0 20px;
    line-height: 70px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
    font-weight: 500;
}

nav a:hover, nav .active {
    color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.05);
}

/* Estilos de los Submenús (Dropdowns) */
.submenu {
    position: absolute;
    top: 70px;
    left: 0;
    background-color: var(--color-white);
    width: 280px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
    border-top: 3px solid var(--color-accent);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.submenu li {
    width: 100%;
    border-bottom: 1px solid #E4E7EB;
}

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

.submenu a {
    color: var(--color-dark);
    line-height: 20px;
    padding: 15px 20px;
    font-size: 13.5px;
}

.submenu a:hover {
    background-color: var(--color-light);
    color: var(--color-secondary);
    padding-left: 25px;
}

/* Mostrar submenú automáticamente al hacer Hover */
.dropdown:hover .submenu {
    opacity: 1;
    visibility: visible;
}

/* ==========================================================================
   SECCIÓN HERO (BIENVENIDA)
   ========================================================================== */
.hero {
    background: linear-gradient(135deg, rgba(16,42,67,0.95), rgba(25,130,196,0.85)), 
                url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?q=80&w=1200') no-repeat center center/cover;
    height: 75vh;
    min-height: 450px;
    color: var(--color-white);
    text-align: center;
    padding-top: 25vh;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero h1 {
    font-size: 40px;
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: 700;
}

.hero p {
    font-size: 18px;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-primary);
    padding: 15px 35px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 15px;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
    display: inline-block;
}

.btn-primary:hover {
    background-color: #E5C158;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

/* ==========================================================================
   SECCIÓN DIFERENCIADORES (POR QUÉ ELEGIRNOS)
   ========================================================================== */
.diferenciadores {
    padding: 90px 0;
    background-color: var(--color-white);
    text-align: center;
}

.diferenciadores h2 {
    font-size: 32px;
    margin-bottom: 45px;
    color: var(--color-primary);
}

.grid-diferenciadores {
    margin-top: 20px;
}

.diferenciador-item {
    width: 31%;
    float: left;
    margin: 0 1.1%;
    padding: 30px 20px;
    text-align: left;
}

.diferenciador-item h4 {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 12px;
    position: relative;
    padding-bottom: 8px;
}

.diferenciador-item h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--color-secondary);
}

.diferenciador-item p {
    font-size: 14.5px;
    color: var(--color-gray);
}

/* ==========================================================================
   SECCIÓN SERVICIOS DESTACADOS (DETALLE)
   ========================================================================== */
.servicios-destacados {
    padding: 90px 0;
    background-color: var(--color-light);
}

.servicios-destacados h2 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 60px;
    color: var(--color-primary);
}

.bloque-servicio {
    background-color: var(--color-white);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    margin-bottom: 40px;
    padding: 45px;
    border-left: 5px solid var(--color-primary);
}

/* Alternar colores de bordes laterales para dinamismo */
.bloque-servicio.reverse { border-left-color: var(--color-secondary); }
.bloque-servicio:nth-child(4) { border-left-color: var(--color-accent); }

.servicio-texto h3 {
    font-size: 22px;
    color: var(--color-dark);
    margin-bottom: 15px;
}

.servicio-texto p {
    font-size: 15px;
    color: var(--color-gray);
    margin-bottom: 20px;
    max-width: 850px;
}

.btn-text {
    color: var(--color-secondary);
    font-weight: 600;
    font-size: 14.5px;
    display: inline-block;
}

.btn-text:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

/* ==========================================================================
   SECCIÓN TESTIMONIOS (PRUEBA SOCIAL)
   ========================================================================== */
.testimonios {
    padding: 90px 0;
    background-color: var(--color-white);
}

.testimonios h2 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 50px;
    color: var(--color-primary);
}

.grid-testimonios {
    max-width: 900px;
    margin: 0 auto;
}

.testimonio-card {
    width: 47%;
    float: left;
    margin: 0 1.5%;
    background-color: var(--color-light);
    padding: 35px;
    border-radius: 6px;
    position: relative;
}

.testimonio-card .quote {
    font-style: italic;
    font-size: 14.5px;
    color: var(--color-dark);
    margin-bottom: 15px;
}

.testimonio-card h5 {
    font-size: 14px;
    color: var(--color-gray);
    font-weight: 600;
}

/* ==========================================================================
   SECCIÓN DE CONTACTO
   ========================================================================== */
.contacto {
    padding: 90px 0;
    background-color: var(--color-primary);
    color: var(--color-white);
}

.contacto h2 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 15px;
}

.contacto .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 60px;
}

.contacto-wrapper {
    margin-top: 20px;
}

/* Distribución de 2 Columnas */
.contacto-info {
    width: 40%;
    float: left;
    padding-right: 5%;
}

.contacto-formulario {
    width: 60%;
    float: left;
    background-color: var(--color-white);
    padding: 40px;
    border-radius: 8px;
    color: var(--color-dark);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.contacto-info h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.contacto-info p {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 30px;
}

.info-list li {
    margin-bottom: 20px;
    font-size: 14.5px;
}

.info-list li strong {
    display: block;
    color: var(--color-white);
}

/* Estilos de los campos del formulario */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13.5px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-dark);
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #D6DCE1;
    border-radius: 4px;
    font-family: var(--font-main);
    font-size: 14px;
    color: var(--color-dark);
    background-color: #F8FAFC;
    transition: var(--transition-fast);
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(25, 130, 196, 0.1);
}

/* Botón de envío */
.btn-submit {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    width: 100%;
    padding: 15px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: 0 4px 12px rgba(16, 42, 103, 0.15);
}

.btn-submit:hover {
    background-color: var(--color-secondary);
    transform: translateY(-1px);
}

/* ==========================================================================
   FOOTER & LIMPIEZA GLOBAL
   ========================================================================== */
footer {
    background-color: #0B1A27;
    color: rgba(255,255,255,0.5);
    padding: 40px 0;
    text-align: center;
    font-size: 13.5px;
    border-top: 1px solid rgba(255,255,255,0.05);
}

/* Limpieza indispensable de floats (Clearfix) */
header::after, 
.grid-diferenciadores::after, 
.grid-testimonios::after, 
.contacto-wrapper::after {
    content: "";
    display: table;
    clear: both;
}

/* ==========================================================================
   ESTILOS COMPLEMENTARIOS: PÁGINAS INTERNAS Y DINAMISMO VISUAL
   ========================================================================== */

/* Hero simplificado para páginas internas */
.hero-page {
    background: linear-gradient(135deg, rgba(16,42,67,0.95), rgba(36,59,85,0.9));
    height: 45vh;
    min-height: 320px;
    color: var(--color-white);
    text-align: center;
    padding-top: 16vh;
}

.hero-page-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-page h1 {
    font-size: 38px;
    margin-bottom: 15px;
    font-weight: 700;
}

.hero-page p {
    font-size: 16.5px;
    color: rgba(255, 255, 255, 0.85);
}

/* Sección de Detalles de Servicio en 2 Columnas */
.detalle-servicios {
    padding: 100px 0;
    background-color: var(--color-white);
}

.fila-servicio {
    margin-bottom: 90px;
    display: block; /* Mantenemos compatibilidad limpia */
}

.fila-servicio:last-child {
    margin-bottom: 0;
}

.col-texto {
    width: 48%;
    float: left;
    padding-top: 20px;
}

.col-imagen {
    width: 48%;
    float: right;
}

/* Clase para invertir el orden visual (Imagen izquierda, texto derecha) */
.fila-servicio.reverse .col-texto {
    float: right;
}

.fila-servicio.reverse .col-imagen {
    float: left;
}

/* Etiquetas pequeñas sobre los títulos */
.servicio-tag {
    display: inline-block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-secondary);
    font-weight: 700;
    margin-bottom: 10px;
    background-color: rgba(25, 130, 196, 0.08);
    padding: 4px 12px;
    border-radius: 20px;
}

.servicio-tag.accent {
    color: var(--color-accent);
    background-color: rgba(212, 175, 55, 0.1);
}

.col-texto h3 {
    font-size: 26px;
    color: var(--color-primary);
    margin-bottom: 20px;
    font-weight: 700;
}

.col-texto p {
    font-size: 15.5px;
    color: var(--color-gray);
    text-align: justify;
}

/* Lista estilizada de auditorías */
.lista-auditorias {
    margin-top: 20px;
}

.lista-auditorias li {
    margin-bottom: 15px;
    font-size: 14.5px;
    color: var(--color-gray);
    position: relative;
    padding-left: 20px;
}

.lista-auditorias li::before {
    content: "■";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-accent);
    font-size: 12px;
}

.lista-auditorias li strong {
    color: var(--color-dark);
}

/* Contenedor dinámico de Imágenes (Efecto interactivo) */
.img-wrapper {
    width: 100%;
    height: 350px;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: var(--transition-fast);
}

.img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Mantiene la proporción de la imagen sin deformarla */
    transition: transform 0.5s ease;
}

/* Animación: Al pasar el cursor, la tarjeta se eleva y la imagen hace zoom suave */
.fila-servicio:hover .img-wrapper {
    box-shadow: 0 15px 35px rgba(16, 42, 67, 0.15);
    transform: translateY(-3px);
}

.fila-servicio:hover .img-wrapper img {
    transform: scale(1.05);
}

/* Call to action de páginas hijas */
.cta-page {
    padding: 80px 0;
    background-color: var(--color-light);
    text-align: center;
    border-top: 1px solid #E4E7EB;
}

.cta-page h2 {
    font-size: 28px;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.cta-page p {
    font-size: 16px;
    color: var(--color-gray);
    margin-bottom: 30px;
}

/* Asegurar limpieza de bloques con float */
.fila-servicio::after {
    content: "";
    display: table;
    clear: both;
}


/* ==========================================================================
   ESTILOS DE REDES SOCIALES EN FOOTER
   ========================================================================== */
.social-links a {
    display: inline-block;
    margin: 0 8px;
    color: var(--color-white, #ffffff);
    background-color: rgba(255, 255, 255, 0.1); /* Círculo sutil semitransparente */
    width: 42px;
    height: 42px;
    line-height: 42px; /* Centra el icono verticalmente */
    border-radius: 50%; /* Hace el botón completamente redondo */
    font-size: 18px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--color-secondary, #1982C4); /* Usa tu azul de acento */
    color: #ffffff;
    transform: translateY(-4px); /* Efecto de levitación */
    box-shadow: 0 5px 15px rgba(25, 130, 196, 0.4);
}