:root {
    --color-primario: #005f73; /* Teal oscuro para fondos y texto */
    --color-acento: #ee9b00; /* Naranja vibrante para botones y acentos */
    --blanco: #FFFFFF;
    --gris-claro: #f4f4f4;
    --texto-color: #333333;
    --font-principal: 'Roboto', sans-serif;
    --font-secundaria: 'Open Sans', sans-serif;
    --color-neutro: #94d2bd; /* Verde azulado suave para detalles */
}

/* --- Reset Básico y Estilos Globales --- */
body {
    font-family: var(--font-secundaria);
    margin: 0;
    color: var(--texto-color);
    background-color: var(--blanco);
    line-height: 1.6;
}

/* Oculta la barra de desplazamiento en todos los elementos */
::-webkit-scrollbar {
    display: none !important;
}

body {
    -ms-overflow-style: none !important;  /* IE y Edge */
    scrollbar-width: none !important;  /* Firefox */
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

img {
    max-width: 100%;
    height: auto;
}

/* --- Header y Navegación --- */
.main-header {
    background: url('ing-Civil_sociedad-actual.png') no-repeat center center/cover;
    color: var(--blanco);
    position: relative;
    overflow: hidden; /* Oculta el exceso de la imagen al escalar */
    animation: kenburns 19s ease-in-out infinite alternate;
}

.main-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 43, 76, 0.7); /* Superposición azul oscuro */
}

.main-nav {
    position: relative;
    z-index: 10;
    padding: 20px 0;
    transition: background-color 0.3s;
}

.main-nav .container {
    display: flex;
    align-items: center;
}

.logo {
    font-family: var(--font-principal);
    font-weight: 700;
    font-size: 1.8em;
    color: var(--blanco);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-img {
    height: 53px;
    margin-right: 10px;
    width: auto;
}

.nav-contact-info {
    margin-left: 30px;
}

.nav-contact-info a {
    color: var(--blanco);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s;
}

.nav-contact-info a:hover {
    color: var(--color-acento);
}

.nav-links {
    margin-left: auto;
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--blanco);
    text-decoration: none;
    margin-left: 15px;
    font-weight: 700;
    transition: color 0.3s;
}

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

.nav-social-icons-wrapper {
    display: inline-flex;
    gap: 10px;
    margin-left: 15px;
}

.nav-social-icons-wrapper a {
    color: var(--color-neutro);
    font-size: 1.1em;
    transition: color 0.3s;
    margin-left: 0; /* Reset margin for icons */
}

.nav-social-icons-wrapper a:hover {
    color: var(--color-acento);
}

/* --- Menú Hamburguesa --- */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1000;
}

.hamburger {
    display: block;
    position: relative;
    width: 25px;
    height: 3px;
    background: var(--blanco);
    transition: all 0.3s ease-in-out;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--blanco);
    transition: all 0.3s ease-in-out;
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

.nav-open .hamburger {
    background: transparent;
}

.nav-open .hamburger::before {
    transform: rotate(45deg) translate(5px, 6px);
}

.nav-open .hamburger::after {
    transform: rotate(-45deg) translate(5px, -6px);
}


.main-nav.sticky {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-primario);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    z-index: 5;
    text-align: center;
    padding: 120px 0;
}

.hero-content h1 {
    font-family: var(--font-principal);
    font-size: 3.5em;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2em;
    margin-bottom: 30px;
}

.btn-primary {
    background-color: var(--color-acento);
    color: var(--blanco);
    padding: 15px 30px;
    text-decoration: none;
    font-weight: 700;
    border-radius: 5px;
    transition: background-color 0.3s, transform 0.3s;
}

.btn-primary:hover {
    background-color: #ffc94d;
    transform: translateY(-3px);
}

/* --- Pillars Section --- */
.pillars-section {
    background-color: var(--blanco);
    padding: 40px 0;
    border-bottom: 1px solid #eee;
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.pillar-item {
    text-align: center;
}

.pillar-icon {
    background-color: var(--color-acento);
    color: var(--blanco);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    font-size: 38px; /* Tamaño del ícono */
    transition: transform 0.3s, background-color 0.3s;
}

.pillar-item:hover .pillar-icon {
    transform: scale(1.1);
    background-color: #fca311;
}

.pillar-item h4 {
    font-family: var(--font-principal);
    color: var(--color-primario);
    font-size: 1.3em;
}

/* --- Estilos de Secciones --- */
.section-padding {
    padding: 80px 0;
}

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

.section-subtitle {
    display: block;
    text-align: center;
    color: var(--color-acento);
    font-weight: 700;
    margin-bottom: 10px;
}

.section-title {
    font-family: var(--font-principal);
    font-size: 2.5em;
    text-align: center;
    margin-bottom: 50px;
    color: var(--color-primario);
}

.text-center {
    text-align: center;
}

/* --- Sección "Sobre Nosotros" --- */
.about-us-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-us-image img {
    border-radius: 10px;
}

.about-us-content .section-title {
    text-align: left;
}

/* --- Sección "Servicios" --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--blanco);
    padding: 0;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 25px rgba(0,0,0,0.1);
}

.service-card img {
    width: 100%;
    border-radius: 10px 10px 0 0;
    margin-bottom: 15px;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.service-card h3 {
    font-family: var(--font-principal);
    color: var(--color-primario);
    padding: 0 15px;
}

.service-card p {
    padding: 0 15px 15px;
}

/* --- Sección "Experiencia" --- */
.ceo-title {
    color: var(--color-primario);
    font-size: 1.5em;
    margin-top: 0;
    margin-bottom: 10px;
}

.ceo-description {
    max-width: 800px;
    margin: 0 auto 30px;
}

.experience-list {
    list-style: none;
    padding: 0;
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.experience-list li {
    background-color: var(--gris-claro);
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 5px;
    border-left: 4px solid var(--color-acento);
}

/* --- Sección "Recursos" --- */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.resource-item {
    background-color: var(--blanco);
    padding: 30px;
    border-radius: 10px;
}

.resource-item h4 {
    font-family: var(--font-principal);
    color: var(--color-primario);
    margin-top: 0;
}

.resource-item ul {
    list-style: none;
    padding: 0;
}

.resource-item ul li {
    padding-left: 20px;
    position: relative;
}

.resource-item ul li::before {
    content: '✓';
    color: var(--color-acento);
    position: absolute;
    left: 0;
}

/* --- Sección CTA --- */
#cta {
    padding: 60px 0;
    background-color: var(--color-primario);
    color: var(--blanco);
}

#cta h2 {
    color: var(--blanco);
    margin-bottom: 30px;
}

/* --- Footer --- */
footer {
    background-color: var(--color-primario);
    color: var(--blanco);
    padding-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    padding-bottom: 40px;
}

.footer-widget h3 {
    color: var(--color-acento);
    font-family: var(--font-principal);
}

.footer-widget ul {
    list-style: none;
    padding: 0;
}

.footer-widget ul li a {
    color: var(--blanco);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-widget ul li a:hover {
    color: var(--color-acento);
}

.footer-widget p a {
    color: var(--blanco);
    text-decoration: none;
}

.footer-widget p a:hover {
    color: var(--color-acento);
}

.whatsapp-link a {
    display: inline-flex;
    align-items: center;
    color: var(--blanco);
    text-decoration: none;
}

.whatsapp-link .fa-whatsapp {
    color: #25D366; /* Color verde de WhatsApp */
    font-size: 1.2em;
    margin-right: 8px;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Animaciones de Scroll --- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Animación Ken Burns --- */
@keyframes kenburns {
    from {
        background-size: 100% 100%;
    }
    to {
        background-size: 115% 115%;
    }
}

/* --- Media Queries para Responsividad --- */
@media (max-width: 768px) {
    .nav-contact-info {
        display: none;
    }

    .nav-social-icons-wrapper {
        margin-left: 0;
        margin-top: 15px;
    }

    .nav-toggle {
        display: block;
        margin-left: auto;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-primario);
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        display: none;
        transform: translateY(-10px);
        opacity: 0;
        transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .nav-links.nav-open {
        display: flex;
        transform: translateY(0);
        opacity: 1;
    }

    .nav-links a {
        margin: 10px 0;
    }

    .hero-content h1 {
        font-size: 2.2em; /* Reducido para evitar cortes */
    }

    .pillars-grid {
        grid-template-columns: 1fr; /* Forzar una sola columna en móvil */
    }

    .about-us-grid {
        grid-template-columns: 1fr;
    }

    .about-us-content .section-title {
        text-align: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}