/* ============================================================================
   GLUEWAY - MAIN STYLESHEET
   HTML5 + CSS3 + Vanilla JS
   IONOS compatible (no build process required)
   ============================================================================ */

/* ============================================================================
   1. CSS VARIABLES (Paleta corporativa)
   ============================================================================ */

:root {
    /* Colores principales - Dark/Premium Theme */
    --color-primary: #0066CC;
    --color-primary-dark: #004FA0;
    --color-dark-bg: #0F0F0F;
    --color-dark-secondary: #1A1A1A;
    --color-dark-tertiary: #2A2A2A;
    --color-gray-light: #CCCCCC;
    --color-gray-lighter: #EEEEEE;
    --color-white: #FFFFFF;
    --color-text-light: #E8E8E8;

    /* Colores secundarios */
    --color-blue-light: #E8F1FC;
    --color-green: #2D8659;
    --color-amber: #E89B3C;

    /* Tipografía */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;

    /* Tamaños (Desktop) */
    --font-size-h1: 56px;
    --font-size-h2: 40px;
    --font-size-h3: 28px;
    --font-size-h4: 24px;
    --font-size-body: 18px;
    --font-size-small: 16px;
    --font-size-tiny: 14px;
    --font-size-micro: 12px;

    /* Line height */
    --line-height-heading: 1.2;
    --line-height-body: 1.6;
    --line-height-tight: 1.4;

    /* Espaciado */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    --spacing-3xl: 40px;
    --spacing-4xl: 60px;
    --spacing-5xl: 80px;

    /* Border radius */
    --radius: 4px;
    --radius-lg: 8px;

    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* Transiciones */
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;

    /* Ancho máximo contenido */
    --max-width: 1200px;
    --max-width-tablet: 720px;
}

/* Mobile responsive */
@media (max-width: 767px) {
    :root {
        --font-size-h1: 40px;
        --font-size-h2: 32px;
        --font-size-h3: 24px;
        --font-size-h4: 20px;
        --font-size-body: 16px;

        --spacing-4xl: 40px;
        --spacing-3xl: 30px;
    }
}

/* ============================================================================
   2. RESET Y ESTILOS BASE
   ============================================================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-body);
    line-height: var(--line-height-body);
    color: var(--color-text-light);
    background-color: var(--color-dark-bg);
    overflow-x: hidden;
}

/* Accesibilidad: Skip link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md) var(--spacing-lg);
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

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

/* Links */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

a:visited {
    color: var(--color-primary-dark);
}

/* ============================================================================
   3. TIPOGRAFÍA
   ============================================================================ */

h1, .h1 {
    font-size: var(--font-size-h1);
    font-weight: 700;
    line-height: var(--line-height-heading);
    margin-bottom: var(--spacing-lg);
}

h2, .h2 {
    font-size: var(--font-size-h2);
    font-weight: 600;
    line-height: var(--line-height-heading);
    margin-bottom: var(--spacing-xl);
}

h3, .h3 {
    font-size: var(--font-size-h3);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-lg);
}

h4, .h4 {
    font-size: var(--font-size-h4);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

p {
    margin-bottom: var(--spacing-xl);
}

p:last-child {
    margin-bottom: 0;
}

small {
    font-size: var(--font-size-tiny);
    color: var(--color-gray-light);
}

/* ============================================================================
   4. CONTENEDOR Y GRID
   ============================================================================ */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-4xl);
}

@media (max-width: 1023px) {
    .container {
        padding: 0 var(--spacing-3xl);
    }
}

@media (max-width: 767px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* Grid base */
.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-2xl);
}

@media (max-width: 767px) {
    .grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* ============================================================================
   5. HEADER Y NAVEGACIÓN
   ============================================================================ */

.header {
    position: sticky;
    top: 0;
    background: var(--color-dark-secondary);
    border-bottom: 1px solid var(--color-dark-tertiary);
    z-index: 999;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.header__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-4xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (max-width: 1023px) {
    .header__container {
        padding: var(--spacing-lg) var(--spacing-3xl);
    }
}

@media (max-width: 767px) {
    .header__container {
        padding: var(--spacing-md) var(--spacing-lg);
    }
}

/* Logo */
.logo__link {
    display: flex;
    align-items: center;
    color: inherit;
}

.logo__image {
    height: 40px;
    width: auto;
}

/* Navegación desktop */
.nav {
    display: flex;
    flex: 1;
    justify-content: center;
    margin: 0 var(--spacing-4xl);
}

.nav__list {
    display: flex;
    list-style: none;
    gap: var(--spacing-3xl);
}

.nav__link {
    color: var(--color-text-light);
    font-weight: 600;
    font-size: var(--font-size-small);
    padding: var(--spacing-md) var(--spacing-lg);
    transition: var(--transition-fast);
    position: relative;
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-primary);
}

.nav__link--active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-lg);
    right: var(--spacing-lg);
    height: 2px;
    background: var(--color-primary);
}

/* Submenu */
.nav__submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-dark-tertiary);
    list-style: none;
    border-top: 2px solid var(--color-primary);
    min-width: 220px;
    box-shadow: var(--shadow-md);
}

.nav__item:hover .nav__submenu,
.nav__item--dropdown:focus-within .nav__submenu {
    display: block;
}

.nav__sublink {
    display: block;
    padding: var(--spacing-md) var(--spacing-xl);
    color: var(--color-text-light);
    font-size: var(--font-size-small);
    transition: var(--transition-fast);
}

.nav__sublink:hover {
    background: var(--color-dark-secondary);
    color: var(--color-primary);
}

/* Selector de idiomas */
.language-selector {
    display: flex;
    gap: var(--spacing-sm);
    margin-left: var(--spacing-2xl);
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--color-gray-light);
    color: var(--color-text-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius);
    font-size: var(--font-size-tiny);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.lang-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.lang-btn--active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* Botón menú móvil */
.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-md);
}

.menu-toggle__line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-light);
    margin: 5px 0;
    transition: var(--transition-fast);
}

@media (max-width: 767px) {
    .nav,
    .language-selector {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .menu-toggle.active .menu-toggle__line:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .menu-toggle.active .menu-toggle__line:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active .menu-toggle__line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
}

/* ============================================================================
   6. HERO
   ============================================================================ */

.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

@media (max-width: 767px) {
    .hero {
        min-height: 400px;
    }
}

.hero__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.35);
    z-index: -1;
}

.hero__content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
}

.hero__container {
    max-width: 800px;
    padding: 0 var(--spacing-2xl);
}

.hero__title {
    color: var(--color-white);
    font-size: var(--font-size-h1);
    margin-bottom: var(--spacing-lg);
}

.hero__subtitle {
    color: rgba(255, 255, 255, 0.95);
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-2xl);
}

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

/* ============================================================================
   7. SECCIONES
   ============================================================================ */

.section {
    padding: var(--spacing-4xl) 0;
}

@media (max-width: 767px) {
    .section {
        padding: var(--spacing-3xl) 0;
    }
}

.section--white {
    background: var(--color-dark-secondary);
}

.section--light-gray {
    background: var(--color-dark-tertiary);
}

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

.section__title {
    font-size: var(--font-size-h2);
    font-weight: 600;
    margin-bottom: var(--spacing-2xl);
}

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

.section__subtitle {
    font-size: var(--font-size-small);
    color: var(--color-gray-light);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section__content {
    max-width: 800px;
}

.section__text {
    font-size: var(--font-size-body);
    line-height: var(--line-height-body);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

/* ============================================================================
   8. BOTONES
   ============================================================================ */

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: var(--radius);
    font-size: var(--font-size-small);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Primary button */
.btn--primary {
    background: var(--color-primary);
    color: var(--color-white);
    border: 1px solid var(--color-primary);
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.2);
    transform: translateY(-2px);
}

.btn--primary:active {
    transform: translateY(0);
}

/* Secondary button */
.btn--secondary {
    background: transparent;
    color: var(--color-text-light);
    border: 1px solid var(--color-gray-light);
}

.btn--secondary:hover {
    background: var(--color-gray-lighter);
    border-color: var(--color-text-light);
}

/* CTA buttons container */
.cta-buttons {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================================================
   9. GRID DE PRODUCTOS
   ============================================================================ */

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

@media (max-width: 767px) {
    .products-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* ============================================================================
   10. PRODUCT CARD
   ============================================================================ */

.product-card {
    background: var(--color-dark-tertiary);
    border: 1px solid var(--color-dark-secondary);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.product-card__image {
    width: 100%;
    height: 240px;
    overflow: hidden;
}

.product-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-card__image img {
    transform: scale(1.05);
}

.product-card__content {
    padding: var(--spacing-2xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card__title {
    font-size: var(--font-size-h4);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.product-card__description {
    font-size: var(--font-size-small);
    color: var(--color-gray-light);
    line-height: var(--line-height-body);
    margin-bottom: var(--spacing-lg);
    flex: 1;
}

.product-card__link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
}

.product-card__link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* ============================================================================
   11. GRID DE BENEFICIOS
   ============================================================================ */

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-2xl);
}

@media (max-width: 1023px) {
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* ============================================================================
   12. BENEFIT ITEM
   ============================================================================ */

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

.benefit-item__icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-primary);
}

.benefit-item__icon svg {
    width: 100%;
    height: 100%;
}

.benefit-item__title {
    font-size: var(--font-size-h4);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.benefit-item__text {
    font-size: var(--font-size-small);
    color: var(--color-gray-light);
    line-height: var(--line-height-body);
}

/* ============================================================================
   13. FOOTER
   ============================================================================ */

.footer {
    background: var(--color-dark-bg);
    color: var(--color-white);
    border-top: 1px solid var(--color-dark-tertiary);
}

.footer__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-4xl) var(--spacing-4xl) var(--spacing-2xl);
}

@media (max-width: 1023px) {
    .footer__container {
        padding: var(--spacing-3xl) var(--spacing-3xl) var(--spacing-xl);
    }
}

@media (max-width: 767px) {
    .footer__container {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

@media (max-width: 1023px) {
    .footer__content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

.footer__column {
    padding-bottom: var(--spacing-2xl);
}

.footer__title {
    font-size: var(--font-size-h4);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.footer__text {
    font-size: var(--font-size-small);
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--line-height-body);
}

.footer__links,
.footer__contact,
.footer__languages {
    list-style: none;
}

.footer__links li,
.footer__contact li,
.footer__languages li {
    margin-bottom: var(--spacing-sm);
}

.footer__links a,
.footer__contact a,
.footer__languages a {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-small);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer__links a:hover,
.footer__contact a:hover,
.footer__languages a:hover {
    color: var(--color-primary);
}

.footer__contact {
    line-height: 1.8;
}

.footer__bottom {
    border-top: 1px solid var(--color-dark-tertiary);
    padding-top: var(--spacing-2xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@media (max-width: 767px) {
    .footer__bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }
}

.footer__copyright {
    font-size: var(--font-size-tiny);
    color: rgba(255, 255, 255, 0.5);
}

.footer__legal {
    list-style: none;
    display: flex;
    gap: var(--spacing-xl);
}

@media (max-width: 767px) {
    .footer__legal {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

.footer__legal a {
    font-size: var(--font-size-tiny);
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================================================
   14. FORMULARIOS (básico)
   ============================================================================ */

input,
textarea,
select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid var(--color-gray-light);
    border-radius: var(--radius);
    font-family: var(--font-family);
    font-size: var(--font-size-small);
    transition: var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-small);
    color: var(--color-text-light);
}

/* ============================================================================
   15. UTILIDADES
   ============================================================================ */

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

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }
.mb-3xl { margin-bottom: var(--spacing-3xl); }
.mb-4xl { margin-bottom: var(--spacing-4xl); }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

/* ============================================================================
   16. CARRUSEL DE PRODUCTOS
   ============================================================================ */

.product-carousel {
    position: relative;
    overflow: hidden;
}

.carousel-img {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.carousel-img.active {
    opacity: 1;
    position: relative;
}

/* ============================================================================
   FIN DEL STYLESHEET
   ============================================================================ */