/* ==========================================================================
   WeldCO - Premium Dark Theme
   Industrial Welding Company Website
   ========================================================================== */

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
    /* Brand Colors */
    --purple-deep: #300063;
    --grey-steel: #73717D;
    --white-clean: #FFFFFF;
    --orange-industrial: #E06F23;
    --blue-steel: #7A8B99;

    /* Light Theme — tonos gris claro */
    --bg-primary: #e8eaed;       /* Gris claro ligeramente más oscuro */
    --bg-secondary: #dfe1e6;     /* Gris secundario más oscuro */
    --bg-alternate: #f0f1f4;     /* Alterno para secciones */
    --bg-surface: #ffffff;       /* Fondo blanco para tarjetas y contenedores */
    --text-primary: #1e1e2d;     /* Color de texto principal oscuro para alto contraste */
    --text-secondary: #5f6173;   /* Color de texto secundario (gris acero oscuro) */
    --accent: var(--orange-industrial); 
    --accent-hover: #d25a0e;     /* Naranja un poco más oscuro para mejor contraste en hover */
    --accent-glow: rgba(224, 111, 35, 0.15);
    --secondary-accent: #5c6c7b; /* Versión más oscura de steel blue para contraste */

    /* Glass Effects & Overlays */
    --glass-bg: rgba(255, 255, 255, 0.85); /* Fondo blanco translúcido */
    --glass-border: rgba(0, 0, 0, 0.08);   /* Borde sutil oscuro */
    --glass-shadow: 0 8px 32px rgba(31, 31, 46, 0.06);
    --hero-overlay-color: rgba(245, 246, 248, 0.82); /* Overlay gris claro para contraste del héroe */
    --card-gradient-color: rgba(224, 111, 35, 0.03); 
    --overlay-color: rgba(30, 0, 99, 0.15); /* Hover overlays */

    /* Typography */
    --font-primary: 'Outfit', sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==========================================================================
   Barandales Site Theme Overrides (Steel Blue Brand Color Theme)
   ========================================================================= */
body.barandales-theme {
    --accent: #5c6c7b;            /* Steel Blue más oscuro para buen contraste */
    --accent-hover: #45525f;
    --accent-glow: rgba(92, 108, 123, 0.15);
    --secondary-accent: var(--orange-industrial);
    --hero-overlay-color: rgba(238, 240, 243, 0.85);
    --card-gradient-color: rgba(92, 108, 123, 0.03);
    --overlay-color: rgba(92, 108, 123, 0.15);
    /* Same grey palette as industrial site */
    --bg-primary: #e8eaed;
    --bg-secondary: #dfe1e6;
    --bg-alternate: #f0f1f4;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
*,
*::before,
*::after {
    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-primary);
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

ul {
    list-style: none;
}

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

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

/* ==========================================================================
   Container
   ========================================================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================================================
   Section Base
   ========================================================================== */
.section {
    padding: var(--section-padding);
}

.bg-alternate {
    background-color: var(--bg-alternate);
}

/* ==========================================================================
   Typography
   ========================================================================== */
.text-accent {
    color: var(--accent);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
    color: var(--text-primary);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--white-clean);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--secondary-accent);
}

.btn-outline:hover {
    background-color: var(--secondary-accent);
    color: var(--white-clean);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--accent-glow);
}

/* Botón oscuro semitransparente para usar sobre fondos con imagen (hero) */
.btn-dark {
    background-color: rgba(10, 5, 20, 0.65);
    color: var(--white-clean);
    border: 2px solid rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.btn-dark:hover {
    background-color: rgba(10, 5, 20, 0.85);
    border-color: rgba(255, 255, 255, 0.75);
    color: var(--white-clean);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
}

/* ==========================================================================
   Navbar
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 15px 0;
    box-shadow: 0 4px 30px rgba(31, 31, 46, 0.05);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    flex-shrink: 0;
}

.logo img {
    height: 40px;
    width: auto;
    object-fit: contain;
    border-radius: 4px;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    position: relative;
    padding: 5px 0;
    transition: var(--transition-fast);
}

/* Cuando el navbar es transparente (sobre el hero), los enlaces deben ser blancos */
.navbar:not(.scrolled) .nav-links a {
    color: rgba(255, 255, 255, 0.92);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.navbar:not(.scrolled) .menu-toggle {
    color: var(--white-clean);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: var(--transition-normal);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

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

.nav-links a.active {
    color: var(--accent);
}

.menu-toggle {
    display: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-primary);
    background: none;
    border: none;
    outline: none;
}

/* ==========================================================================
   Site Toggle (Language / Site Switcher)
   ========================================================================== */
.site-toggle {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    padding: 4px;
    position: relative;
    gap: 0;
}

.site-toggle .toggle-option {
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--white-clean);
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    z-index: 2;
    background: transparent;
    border: none;
    font-family: var(--font-primary);
}

.site-toggle .toggle-option.active {
    background: var(--accent);
    color: var(--white-clean);
    box-shadow: 0 2px 10px var(--accent-glow);
}

.site-toggle .toggle-option:not(.active):hover {
    color: var(--accent);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    background-image: url('../images/page_0_img_1.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
}

.hero-barandales {
    background-image: url('../images/barandales/hero.jpg') !important;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Overlay siempre oscuro independiente del tema (light/dark) para que el texto del hero sea siempre legible */
    background: linear-gradient(
        160deg,
        rgba(5, 0, 12, 0.90) 0%,
        rgba(10, 0, 22, 0.72) 50%,
        rgba(5, 0, 12, 0.88) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--white-clean);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s forwards 0.2s;
}

.hero-title .text-accent {
    color: var(--accent);
}

.hero-subtitle {
    font-size: 1.2rem;
    /* Color explícito blanco sobre hero (fondo siempre oscuro), no heredar del tema light */
    color: rgba(255, 255, 255, 0.82);
    margin-bottom: 40px;
    font-weight: 400;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s forwards 0.4s;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s forwards 0.6s;
}

/* ==========================================================================
   Companies Marquee / Carousel
   ========================================================================== */
.companies-section {
    padding: 60px 0;
    background-color: var(--bg-alternate);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.companies-section .section-header {
    margin-bottom: 40px;
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.marquee-wrapper {
    overflow: hidden;
    position: relative;
}

.marquee-wrapper::before,
.marquee-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    z-index: 2;
}

.marquee-wrapper::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-alternate), transparent);
}

.marquee-wrapper::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-alternate), transparent);
}

.marquee-track {
    display: flex;
    gap: 28px;
    animation: marquee 30s linear infinite;
    width: max-content;
    align-items: center;
}

.company-logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 170px;
    height: 82px;
    padding: 16px 22px;
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    opacity: 0.85;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
    box-shadow: 0 10px 25px rgba(31, 31, 46, 0.05);
}

.company-logo:hover {
    opacity: 1;
    transform: translateY(-2px);
}

.company-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.company-logo span {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--white-clean);
    white-space: nowrap;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* ==========================================================================
   About / Nosotros Section
   ========================================================================== */
.about-container,
.nosotros-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p,
.nosotros-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.stats,
.stats-row {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--accent);
    font-weight: 800;
    margin-bottom: 5px;
}

.stat-item p {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin: 0;
    font-weight: 600;
}

.about-image,
.nosotros-image {
    position: relative;
}

.about-image::before,
.nosotros-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent);
    border-radius: 10px;
    z-index: 1;
}

.about-image img,
.nosotros-image img {
    border-radius: 10px;
    position: relative;
    z-index: 2;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--bg-surface);
    border-radius: 15px;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    border: 1px solid var(--glass-border);
    border-top: 4px solid var(--accent);
    opacity: 0;
    transform: translateY(30px);
    box-shadow: var(--glass-shadow);
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px var(--accent-glow);
    border-color: var(--accent);
}

.service-icon {
    padding: 25px 25px 0;
    font-size: 2.5rem;
    color: var(--accent);
}

.service-img {
    height: 220px;
    overflow: hidden;
}

.service-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.service-card:hover .service-img img {
    transform: scale(1.1);
}

.service-content {
    padding: 25px;
}

.service-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-primary);
}

.service-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.service-details {
    list-style: none;
    margin-top: 15px;
    padding: 0;
}

.service-details li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.service-details li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

/* ==========================================================================
   Certifications Section
   ========================================================================== */
.certifications-section {
    padding: var(--section-padding);
}

.certifications-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.certification-card {
    background: var(--bg-surface);
    border-radius: 20px;
    padding: 50px 40px;
    border: 1px solid var(--glass-border);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--glass-shadow);
}

.certification-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), #ffd700);
}

.certification-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 15px 40px var(--accent-glow);
}

.certification-card .cert-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.certification-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.certification-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* ==========================================================================
   Target Audience Section
   ========================================================================== */
.audience-section {
    padding: var(--section-padding);
    background-color: var(--bg-alternate);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
}

.audience-card {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 35px 25px;
    text-align: center;
    transition: var(--transition-normal);
    box-shadow: var(--glass-shadow);
}

.audience-card:hover {
    transform: translateY(-5px);
    border-color: rgba(224, 111, 35, 0.3);
    box-shadow: 0 10px 30px rgba(224, 111, 35, 0.1);
}

.audience-card .audience-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.audience-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.audience-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   Benefits Section
   ========================================================================== */
.benefits-section {
    padding: var(--section-padding);
}

/* Benefits en modo solo-texto (sin imagen): contenido centrado y ancho máximo */
.benefits-container {
    max-width: 760px;
    margin: 0 auto;
}

.benefits-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.benefits-list li {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1.05rem;
    color: var(--text-secondary);
    padding: 14px 20px;
    background: var(--bg-surface);
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: var(--transition-fast);
}

.benefits-list li:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.benefits-list li i {
    font-size: 1.4rem;
    color: var(--accent);
    flex-shrink: 0;
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--glass-border);
}

.benefit-item:last-child {
    border-bottom: none;
}

.benefit-item .benefit-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: rgba(224, 111, 35, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.2rem;
}

.benefit-item .benefit-icon i {
    color: var(--accent);
}

.benefit-item h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.benefit-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   Lightbox
   ========================================================================== */
#lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9000;
    background: rgba(5, 0, 12, 0.95);
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
    animation: fadeIn 0.2s ease;
}

#lightbox.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

#lightbox img {
    max-width: 90vw;
    max-height: 88vh;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.7);
    animation: zoomIn 0.25s ease;
}

@keyframes zoomIn {
    from { transform: scale(0.92); opacity: 0; }
    to   { transform: scale(1);    opacity: 1; }
}

#lightbox-close {
    position: fixed;
    top: 20px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white-clean);
    font-size: 1.5rem;
    cursor: pointer;
    transition: background var(--transition-fast);
    z-index: 9001;
}

#lightbox-close:hover {
    background: rgba(255,255,255,0.22);
}

#lightbox-caption {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.75);
    font-size: 0.9rem;
    font-family: var(--font-primary);
    text-align: center;
    max-width: 600px;
    padding: 0 20px;
    pointer-events: none;
}

/* ==========================================================================
   Instagram Section
   ========================================================================== */
.instagram-section {
    padding: var(--section-padding);
    background-color: var(--bg-alternate);
}

.instagram-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.instagram-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    aspect-ratio: 1 / 1;
    background: linear-gradient(135deg, var(--card-gradient-color), rgba(10, 0, 18, 0.6));
    border: 1px solid var(--glass-border);
    cursor: pointer;
}

.instagram-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.instagram-card:hover img {
    transform: scale(1.1);
}

.instagram-card .instagram-overlay {
    position: absolute;
    inset: 0;
    background: var(--overlay-color);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.instagram-card:hover .instagram-overlay {
    opacity: 1;
}

.instagram-card .instagram-overlay i {
    font-size: 2.5rem;
    color: var(--white-clean);
}

/* ==========================================================================
   Portfolio / Galería Principal
   ========================================================================== */
.portfolio-section {
    padding: var(--section-padding);
    background-color: var(--bg-alternate);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.portfolio-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    cursor: pointer;
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    display: block;
}

.portfolio-item:hover img {
    transform: scale(1.07);
}

.portfolio-item .portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(5, 0, 12, 0.75) 0%,
        transparent 55%
    );
    display: flex;
    align-items: flex-end;
    padding: 18px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item .portfolio-caption {
    color: var(--white-clean);
    font-size: 0.88rem;
    font-weight: 600;
    line-height: 1.3;
}

/* ==========================================================================
   Blog Section
   ========================================================================== */
.blog-section {
    padding: var(--section-padding);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.blog-card {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition-normal);
    box-shadow: var(--glass-shadow);
}

.blog-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px var(--accent-glow);
}

.blog-card .blog-image {
    height: 200px;
    overflow: hidden;
}

.blog-card .blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-image img {
    transform: scale(1.05);
}

.blog-card .blog-content {
    padding: 25px;
}

.blog-card .blog-content .blog-date {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 10px;
    display: block;
}

.blog-card .blog-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.blog-card .blog-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.blog-card .blog-content .blog-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-top: 15px;
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.blog-card .blog-content .blog-link:hover {
    color: var(--accent-hover);
    gap: 10px;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.contact-list li {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    align-items: center;
}

.contact-list i {
    font-size: 1.5rem;
    color: var(--accent);
    background: rgba(224, 111, 35, 0.15);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}

.contact-list h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.contact-list p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact-list a:hover {
    color: var(--accent);
}

.cta-card {
    background: linear-gradient(145deg, var(--purple-deep), var(--accent));
    padding: 50px 40px;
    border-radius: 20px;
    text-align: center;
    color: var(--white-clean);
    border: 1px solid rgba(224, 111, 35, 0.3);
    box-shadow: 0 20px 40px rgba(224, 111, 35, 0.15);
}

.cta-card h3 {
    font-size: 2rem;
    margin-bottom: 15px;
    color: var(--white-clean);
}

.cta-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
    font-size: 1.05rem;
}

.cta-card .btn-primary {
    background-color: var(--white-clean);
    color: var(--purple-deep);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-card .btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: #11111e;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 60px 0 20px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo img {
    height: 40px;
    margin-bottom: 15px;
    border-radius: 4px;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.6);
    max-width: 300px;
    font-size: 0.95rem;
}

.footer-links h3,
.footer-social h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    color: var(--white-clean);
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition-fast);
}

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

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

.social-icons a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition-normal);
}

.social-icons a:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white-clean);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px var(--accent-glow);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--accent);
}

.footer-bottom a:hover {
    color: var(--accent-hover);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scroll-anim {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.delay-1 {
    transition-delay: 0.1s;
}

.delay-2 {
    transition-delay: 0.2s;
}

.delay-3 {
    transition-delay: 0.3s;
}

.delay-4 {
    transition-delay: 0.4s;
}

/* ==========================================================================
   Sparks Canvas
   ========================================================================== */
#sparks-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
}

/* ==========================================================================
   Floating WhatsApp
   ========================================================================== */
.floating-whatsapp {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #25D366;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 35px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    z-index: 1000;
    transition: var(--transition-normal);
}

.floating-whatsapp:hover {
    transform: scale(1.1) translateY(-5px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

/* ==========================================================================
   Gallery (Barandales)
   ========================================================================== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.gallery-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-item .overlay {
    position: absolute;
    inset: 0;
    background: var(--overlay-color);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item:hover .overlay {
    opacity: 1;
}

.gallery-item .overlay i {
    font-size: 2rem;
    color: var(--white-clean);
}

/* ==========================================================================
   Responsive - 992px
   ========================================================================== */
@media (max-width: 992px) {
    .hero-title {
        font-size: 3.5rem;
    }

    .about-container,
    .nosotros-container,
    .contact-container,
    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image,
    .nosotros-image {
        order: -1;
        margin-bottom: 30px;
    }

    .about-image::before,
    .nosotros-image::before {
        display: none;
    }

    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .instagram-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-logo p {
        margin: 0 auto;
    }

    .social-icons {
        justify-content: center;
    }
}

/* ==========================================================================
   Responsive - 768px
   ========================================================================== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100dvh - 80px); /* Usando dynamic viewport height para evitar desbordes */
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(25px);
        -webkit-backdrop-filter: blur(25px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: var(--transition-normal);
        gap: 35px;
        z-index: 999;
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links a {
        font-size: 1.3rem;
        letter-spacing: 1px;
    }

    .nav-btn {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .site-toggle {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .site-toggle .toggle-option {
        flex: 1;
        text-align: center;
    }

    .hero-title {
        font-size: 2.6rem;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch; /* Botones al 100% de ancho del contenedor */
        gap: 15px;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
        text-align: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .stats {
        flex-direction: column;
        gap: 25px;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .audience-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .instagram-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .portfolio-grid {
        grid-template-columns: repeat(1, 1fr);
        gap: 15px;
    }

    .blog-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .contact-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .footer-logo p {
        margin: 0 auto;
    }

    .social-icons {
        justify-content: center;
    }

    .section {
        padding: 60px 0;
    }
}

/* ==========================================================================
   Responsive - 480px (small phones)
   ========================================================================== */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2.1rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .stat-item h3 {
        font-size: 2rem;
    }

    .certification-card {
        padding: 35px 25px;
    }

    .cta-card {
        padding: 35px 25px;
    }

    .container {
        padding: 0 15px;
    }

    .floating-whatsapp {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 28px;
    }
}

/* ==========================================================================
   WebGL 3D Hero Background Canvas Containers
   ========================================================================== */
#welding-3d-container,
#barandales-3d-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0; /* Detrás del overlay oscuro y el texto del héroe */
    overflow: hidden;
    pointer-events: none; /* Permite clics en botones del héroe y toggle */
}

#welding-3d-container canvas,
#barandales-3d-container canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

/* ==========================================================================
   Contact Form Fields (Light Theme styling)
   ========================================================================== */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    width: 100%;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 20px;
    border-radius: 8px;
    background: var(--bg-surface);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-normal);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}