/* ===================================
   VARIABLES Y CONFIGURACIÓN GLOBAL
   =================================== */

:root {
    /* Colores Principales */
    --color-primary: #1e3a8a;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1e40af;
    
    --color-secondary: #dc2626;
    --color-secondary-light: #ef4444;
    
    /* Colores Neutros */
    --color-dark: #1f2937;
    --color-gray: #6b7280;
    --color-gray-light: #9ca3af;
    --color-gray-lighter: #f3f4f6;
    --color-white: #ffffff;
    
    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Tamaños de Fuente */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2rem;           /* Reducido de 2.25rem */
    --font-size-5xl: 2.5rem;         /* Reducido de 3rem */

    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 2.5rem;            /* Reducido de 3rem */
    --spacing-2xl: 3rem;             /* Reducido de 4rem */
    --spacing-3xl: 4rem;             /* Reducido de 6rem */
    
    /* Bordes */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transiciones */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Layout */
    --max-width-container: 1200px;
    --header-height: 80px;
}

/* ===================================
   RESET Y ESTILOS BASE
   =================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-regular);
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ===================================
   UTILIDADES
   =================================== */

.container {
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray);
    max-width: 700px;
    margin: 0 auto;
}

.text-primary {
    color: var(--color-primary-light);
}

.text-secondary {
    color: var(--color-secondary);
}

/* ===================================
   HEADER Y NAVEGACIÓN
   =================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: box-shadow var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.nav__logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav__item {
    list-style: none;
}

.nav__link {
    font-size: 0.9375rem;
    font-weight: var(--font-weight-semibold);
    color: #334155;
    padding: 0.625rem 1rem;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    display: inline-block;
    text-align: center;
    white-space: nowrap;
    line-height: 1.3;
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-primary);
    background-color: rgba(102, 126, 234, 0.08);
}

.nav__link--cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
}

.nav__link--cta:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
}

.nav__link--aula {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    padding: 0.5rem 1.25rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    background-color: transparent;
}

.nav__link--aula:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.25);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-dark);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    margin-top: var(--header-height);
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #f3f4f6 0%, #ffffff 100%);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero__content {
    max-width: 600px;
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--color-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero__image {
    position: relative;
}

.hero__img {
    width: 100%;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
}

/* ===================================
   MISIÓN Y VISIÓN
   =================================== */

.mission {
    background-color: var(--color-white);
}

.mission__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.mission__card {
    background-color: var(--color-gray-lighter);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.mission__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.mission__icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.mission__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.mission__text {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.8;
}

/* ===================================
   EVENTO
   =================================== */

.event {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.event__header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.event__badge {
    display: inline-block;
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.event .section__title,
.event .section__subtitle {
    color: var(--color-white);
}

.event__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
}

.event__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.event__benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.event__benefit {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.event__benefit-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

.event__img {
    width: 100%;
    border-radius: var(--border-radius-md);
}

/* ===================================
   TECNOLOGÍA E INNOVACIÓN
   =================================== */

.tech-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--color-white);
}

.tech-section__badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    backdrop-filter: blur(10px);
}

.tech-section .section__header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.tech-section .section__title,
.tech-section .section__subtitle {
    color: var(--color-white);
}

.tech-section__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    max-width: 1100px;
    margin: 0 auto;
}

.tech-card {
    background: rgba(255, 255, 255, 0.95);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.tech-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.tech-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    border-radius: 50%;
    margin-bottom: var(--spacing-lg);
}

.tech-card__icon svg {
    color: var(--color-white);
}

.tech-card__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.tech-card__description {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.tech-card__features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.tech-card__features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    color: var(--color-dark);
}

.tech-card__features li svg {
    flex-shrink: 0;
    color: var(--color-primary-light);
    margin-top: 2px;
}

.tech-card .btn {
    width: 100%;
}

/* Responsive para tech-section */
@media (min-width: 768px) {
    .tech-section__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===================================
   BLOG PREVIEW
   =================================== */

.blog-preview {
    background-color: var(--color-gray-lighter);
}

.blog-preview__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

/* ===================================
   CTA SECTION
   =================================== */

.cta {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
    color: var(--color-white);
    text-align: center;
}

.cta__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.cta__description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.cta__buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background-color: var(--color-dark);
    color: var(--color-gray-light);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer__logo-img {
    width: 40px;
    height: 40px;
}

.footer__logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
}

.footer__description {
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.footer__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__link {
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-primary-light);
}

.footer__contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer__contact li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.footer__social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer__social-link {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.footer__social-link:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-3px);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright {
    font-size: var(--font-size-sm);
}

.footer__legal {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.footer__legal-link {
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer__legal-link:hover {
    color: var(--color-primary-light);
}