/* ==========================================================================
   VARIABLES DE COLOR Y CONFIGURACIÓN GENERAL
   ========================================================================== */
:root {
    --blue-primary: #0A2240;      /* Azul marino profundo (Elegancia y seriedad) */
    --blue-light: #1A3A5F;        /* Azul complementario para efectos hover y tarjetas */
    --blue-dark-btn: #051426;     /* Azul oscuro solicitado para la pestaña especial */
    --gold-accent: #C5A059;       /* Dorado/Oro para dar presencia y resaltar elementos */
    --white: #FFFFFF;
    --gray-bg: #F4F7F9;           /* Fondo suave para secciones */
    --text-color: #333333;
    --text-muted: #666666;
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --transition-smooth: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 0;
}

/* Títulos de sección estandarizados */
.section-title {
    text-align: center;
    font-size: 2.2rem;
    color: var(--blue-primary);
    margin-bottom: 40px;
    position: relative;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--gold-accent);
    margin: 10px auto 0;
}

/* ==========================================================================
   HEADER Y NAVEGACIÓN (RESPONSIVO)
   ========================================================================== */
.main-header {
    background-color: var(--white);
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo h1 {
    color: var(--blue-primary);
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 1px;
    line-height: 1;
}

.logo span {
    font-size: 0.85rem;
    color: var(--gold-accent);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.main-nav ul {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 20px;
}

.main-nav a {
    text-decoration: none;
    color: var(--blue-primary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 8px 12px;
    transition: var(--transition-smooth);
}

.main-nav a:hover, .main-nav a.active {
    color: var(--gold-accent);
}

/* Pestaña especial: Oferta Académica */
.main-nav .nav-btn-dark {
    background-color: var(--blue-dark-btn);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 4px;
    border: 1px solid transparent;
}

.main-nav .nav-btn-dark:hover {
    background-color: transparent;
    color: var(--blue-dark-btn) !important;
    border-color: var(--blue-dark-btn);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--blue-primary);
    cursor: pointer;
}

/* ==========================================================================
   CARRUSEL PRINCIPAL (HERO)
   ========================================================================== */
.hero-carousel {
    position: relative;
    height: 75vh;
    min-height: 450px;
    overflow: hidden;
}

.carousel-container {
    height: 100%;
    position: relative;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 1;
}

.carousel-slide.active {
    opacity: 1;
    z-index: 2;
}

.slide-content {
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
}

.slide-content h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    border-bottom: 2px solid var(--gold-accent);
    padding-bottom: 10px;
}

.slide-content p {
    font-size: 1.3rem;
}

.carousel-prev, .carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(10, 34, 64, 0.5);
    color: white;
    border: none;
    font-size: 2rem;
    padding: 15px;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition-smooth);
}

.carousel-prev:hover, .carousel-next:hover {
    background: var(--gold-accent);
}

.carousel-prev { left: 20px; }
.carousel-next { right: 20px; }

/* ==========================================================================
   SECCIÓN 1: CONTADORES ANIMADOS
   ========================================================================== */
.section-counters {
    background-color: var(--white);
}

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

.counter-card {
    background: var(--gray-bg);
    padding: 40px 20px;
    border-radius: 8px;
    border-bottom: 4px solid var(--blue-primary);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition-smooth);
}

.counter-card:hover {
    transform: translateY(-5px);
    border-bottom-color: var(--gold-accent);
}

.counter-icon {
    font-size: 3rem;
    color: var(--gold-accent);
    margin-bottom: 15px;
}

.counter-number {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--blue-primary);
    line-height: 1;
    margin-bottom: 10px;
}

.counter-card h3 {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ==========================================================================
   SECCIÓN 2: CARRUSEL DE SERVICIOS
   ========================================================================== */
.section-services {
    background-color: var(--gray-bg);
}

.services-carousel-wrapper {
    overflow: hidden;
    position: relative;
    padding: 10px;
}

.services-carousel {
    display: flex;
    gap: 30px;
    transition: var(--transition-smooth);
}

.service-card {
    flex: 0 0 calc(33.333% - 20px);
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.service-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.service-info {
    padding: 25px;
}

.service-info h3 {
    color: var(--blue-primary);
    margin-bottom: 12px;
    font-size: 1.3rem;
}

/* ==========================================================================
   SECCIÓN 3: NOTICIAS
   ========================================================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.news-card {
    background: var(--white);
    border-left: 5px solid var(--blue-primary);
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: var(--transition-smooth);
}

.news-card:hover {
    border-left-color: var(--gold-accent);
    background-color: var(--gray-bg);
}

.news-date {
    font-size: 0.85rem;
    color: var(--gold-accent);
    font-weight: bold;
    margin-bottom: 10px;
}

.news-card h3 {
    color: var(--blue-primary);
    margin-bottom: 15px;
}

.news-link {
    display: inline-block;
    margin-top: 15px;
    color: var(--blue-light);
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
}

.news-link:hover {
    color: var(--gold-accent);
}

/* ==========================================================================
   PIE DE PÁGINA (FOOTER FORMAL)
   ========================================================================== */
.main-footer {
    background-color: var(--blue-primary);
    color: var(--white);
    padding-top: 60px;
}

.footer-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1.5fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-block h3 {
    color: var(--gold-accent);
    font-size: 1.2rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-address p {
    font-size: 0.95rem;
    line-height: 1.8;
}

.footer-emails ul {
    list-style: none;
}

.footer-emails li {
    margin-bottom: 10px;
}

.footer-emails a {
    color: var(--white);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.footer-emails a:hover {
    color: var(--gold-accent);
    padding-left: 5px;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    color: var(--white);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.social-icons a:hover {
    background-color: var(--gold-accent);
    transform: translateY(-3px);
}

.footer-bottom {
    background-color: var(--blue-dark-btn);
    text-align: center;
    padding: 20px 10px;
    font-size: 0.85rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* ==========================================================================
   DISEÑO RESPONSIVO (MEDIA QUERIES)
   ========================================================================== */

/* Tabletas e inferiores (Pantallas por debajo de 992px) */
@media (max-width: 992px) {
    .slide-content h2 { font-size: 2.2rem; }
    .service-card { flex: 0 0 calc(50% - 15px); } /* Muestra 2 tarjetas */
    .footer-container { grid-template-columns: 1fr 1fr; }
    .footer-socials { grid-column: span 2; }
}

/* Celulares (Pantallas por debajo de 768px) */
@media (max-width: 768px) {
    .menu-toggle { display: block; } /* Aparece botón hamburguesa */
    
    .main-nav {
        display: none; /* Oculto por defecto en móvil */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
    }
    
    /* Clase que activará JavaScript para desplegar menú */
    .main-nav.open { display: block; }
    
    .main-nav ul {
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }
    
    .main-nav li {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid #eee;
    }
    
    .main-nav a {
        display: block;
        padding: 15px 0;
    }
    
    .main-nav .nav-btn-dark {
        margin-top: 10px;
        border-radius: 0;
    }

    .hero-carousel { height: 60vh; }
    .slide-content h2 { font-size: 1.8rem; }
    .slide-content p { font-size: 1rem; }

    .service-card { flex: 0 0 100%; } /* Muestra 1 sola tarjeta */
    
    .footer-container { grid-template-columns: 1fr; gap: 30px; }
    .footer-socials { grid-column: span 1; }
}