/* ===================================================
   EXPAND HOME — Design System & Global Styles
   =================================================== */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Brand Colors */
  --color-primary: #005689;
  --color-primary-dark: #003d63;
  --color-primary-light: #0074b7;
  --color-secondary: #4D4D4D;
  --color-secondary-light: #6b6b6b;
  --color-accent: #F5F5F5;
  --color-white: #FFFFFF;
  --color-black: #1a1a1a;
  --color-success: #27ae60;
  --color-whatsapp: #25D366;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #005689 0%, #0074b7 100%);
  --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  --gradient-hero: linear-gradient(180deg, rgba(0, 0, 0, 0.55) 0%, rgba(0, 86, 137, 0.45) 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.95) 0%, rgba(245, 245, 245, 0.9) 100%);

  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.16);
  --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.2);
  --shadow-card: 0 4px 24px rgba(0, 86, 137, 0.1);
  --shadow-card-hover: 0 12px 40px rgba(0, 86, 137, 0.18);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Layout */
  --container-max: 1280px;
  --container-wide: 1440px;
  --header-height: 80px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--color-secondary);
  background-color: var(--color-white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* --- Typography --- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-black);
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.75rem);
}

h4 {
  font-size: clamp(1rem, 2vw, 1.25rem);
}

p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-secondary);
}

.lead {
  font-size: 1.15rem;
  line-height: 1.9;
  color: var(--color-secondary-light);
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

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

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-header p {
  max-width: 640px;
  margin: var(--space-lg) auto 0;
}

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

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

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

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

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

.bg-dark {
  background: var(--gradient-dark);
}

.bg-primary {
  background: var(--gradient-primary);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  border-radius: var(--radius-xl);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(0, 86, 137, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 86, 137, 0.4);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: 18px 42px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 10px 22px;
  font-size: 0.85rem;
}

.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: var(--radius-full);
}


/* ===================================================
   HEADER & NAVIGATION
   =================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1100;
  transition: all var(--transition-base);
  background: transparent;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.site-header.scrolled .nav-link {
  color: var(--color-secondary);
}

.site-header.scrolled .nav-link:hover,
.site-header.scrolled .nav-link.active {
  color: var(--color-primary);
}

.site-header.scrolled .header-logo img {
  filter: none;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-xl);
  max-width: var(--container-wide);
  margin: 0 auto;
}

.header-logo img {
  height: 45px;
  width: auto;
  transition: filter var(--transition-base);
}

.header-logo-scrolled {
  display: none;
}

.site-header.scrolled .header-logo-default {
  display: none;
}

.site-header.scrolled .header-logo-scrolled {
  display: block;
}

/* When header is NOT on a hero page (e.g. internal pages without video bg) */
.site-header.header-solid {
  background: var(--color-white);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.site-header.header-solid .nav-link {
  color: var(--color-secondary);
}

.site-header.header-solid .nav-link:hover,
.site-header.header-solid .nav-link.active {
  color: var(--color-primary);
}

.site-header.header-solid .header-logo img {
  filter: none;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-link {
  padding: 8px 16px;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-white);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.15);
}

.site-header.scrolled .nav-link:hover,
.site-header.scrolled .nav-link.active {
  background: rgba(0, 86, 137, 0.08);
}

.site-header.header-solid .nav-link:hover,
.site-header.header-solid .nav-link.active {
  background: rgba(0, 86, 137, 0.08);
}

/* Dropdown */
.nav-item-dropdown {
  position: relative;
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-sm) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 100;
}

.nav-item-dropdown:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
  color: var(--color-secondary);
  transition: all var(--transition-fast);
}

.nav-dropdown a:hover {
  background: var(--color-accent);
  color: var(--color-primary);
  padding-left: 26px;
}

/* Language Selector */
.lang-selector {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  padding: 3px;
  margin-left: var(--space-sm);
}

.site-header.scrolled .lang-selector,
.site-header.header-solid .lang-selector {
  background: var(--color-accent);
}

.lang-btn {
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-heading);
  border-radius: var(--radius-xl);
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
}

.site-header.scrolled .lang-btn,
.site-header.header-solid .lang-btn {
  color: var(--color-secondary-light);
}

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

.site-header.scrolled .lang-btn.active,
.site-header.header-solid .lang-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
}

/* Header CTA */
.header-cta {
  margin-left: var(--space-sm);
}

.header-cta .btn {
  padding: 10px 24px;
  font-size: 0.85rem;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  z-index: 1100;
}

.mobile-toggle span {
  display: block;
  height: 2.5px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.site-header.scrolled .mobile-toggle span,
.site-header.header-solid .mobile-toggle span {
  background: var(--color-secondary);
}

.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-toggle.active span {
  background: var(--color-secondary);
}


/* ===================================================
   HERO SECTION
   =================================================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-video-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-hero);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 0 var(--space-xl);
}

.hero-content h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-content .lead {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-2xl);
  font-size: 1.2rem;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounce 2s infinite;
}

.hero-scroll a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
  font-family: var(--font-heading);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-scroll svg {
  width: 24px;
  height: 24px;
}

@keyframes bounce {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  40% {
    transform: translateX(-50%) translateY(-10px);
  }

  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* Page Hero (for internal pages) */
.page-hero {
  position: relative;
  padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
  background: var(--gradient-dark);
  overflow: hidden;
  min-height: 350px;
  display: flex;
  align-items: center;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 86, 137, 0.3) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.page-hero p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  font-size: 1.1rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  font-size: 0.85rem;
}

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

.breadcrumb a:hover {
  color: var(--color-white);
}

.breadcrumb span {
  color: rgba(255, 255, 255, 0.4);
}

.breadcrumb .current {
  color: rgba(255, 255, 255, 0.9);
}


/* ===================================================
   CARDS & GRID
   =================================================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
  position: relative;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

.card-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}

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

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

.card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 14px;
  background: var(--gradient-primary);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-heading);
  border-radius: var(--radius-xl);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.card-body {
  padding: var(--space-xl);
}

.card-body h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.3rem;
}

.card-body p {
  font-size: 0.95rem;
  margin-bottom: var(--space-lg);
}

.card-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid #eee;
}

.card-spec {
  display: flex;
  flex-direction: column;
}

.card-spec-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-secondary-light);
  font-family: var(--font-heading);
  font-weight: 600;
}

.card-spec-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-heading);
}


/* ===================================================
   FEATURES / STATS SECTION
   =================================================== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  padding: var(--space-3xl) 0;
}

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

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-secondary-light);
}

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

.feature-card {
  text-align: center;
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  border: 1px solid #eee;
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 86, 137, 0.08);
  border-radius: var(--radius-md);
}

.feature-card h4 {
  margin-bottom: var(--space-sm);
  font-size: 1.05rem;
}

.feature-card p {
  font-size: 0.9rem;
  line-height: 1.6;
}


/* ===================================================
   CTA BANNER
   =================================================== */
.cta-banner {
  background: var(--gradient-dark);
  padding: var(--space-4xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 116, 183, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 86, 137, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-2xl);
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .btn {
  position: relative;
  z-index: 1;
}


/* ===================================================
   PRODUCT PAGE
   =================================================== */
.product-hero {
  position: relative;
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-3xl);
  background: var(--gradient-dark);
  overflow: hidden;
}

.product-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.product-hero-text h1 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.product-hero-text .lead {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-2xl);
}

.product-hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.product-hero-image img {
  width: 100%;
  height: auto;
}

/* Specs Table */
.specs-section {
  background: var(--color-accent);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.specs-table th,
.specs-table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid #eee;
}

.specs-table thead th {
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.specs-table tbody tr:hover {
  background: rgba(0, 86, 137, 0.03);
}

.specs-table tbody td:first-child {
  font-weight: 600;
  color: var(--color-black);
}

/* Uses Suggested */
.uses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.use-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.use-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.use-card-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 86, 137, 0.08);
  border-radius: var(--radius-md);
}

.use-card h4 {
  margin-bottom: var(--space-sm);
}


/* ===================================================
   TECHNOLOGY PAGE
   =================================================== */
.tech-process {
  counter-reset: step;
}

.tech-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
  align-items: start;
}

.tech-step-number {
  counter-increment: step;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(0, 86, 137, 0.3);
  flex-shrink: 0;
}

.tech-step-content h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.4rem;
}

.tech-step-content p {
  font-size: 1rem;
  line-height: 1.8;
}

/* Materials Grid */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.material-card {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border-left: 4px solid var(--color-primary);
  transition: all var(--transition-base);
}

.material-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.material-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 86, 137, 0.08);
  border-radius: var(--radius-md);
}

.material-info h4 {
  margin-bottom: var(--space-xs);
}

.material-info p {
  font-size: 0.9rem;
}


/* ===================================================
   SHOWROOM / GALLERY
   =================================================== */
.gallery-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.gallery-tab {
  padding: 10px 24px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-xl);
  border: 2px solid #ddd;
  color: var(--color-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.gallery-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.gallery-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
}

.gallery-item img,
.gallery-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img,
.gallery-item:hover video {
  transform: scale(1.08);
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.6) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-lg);
}

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

.gallery-item-overlay span {
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
}

/* Large gallery item */
.gallery-item.gallery-large {
  grid-column: span 2;
  grid-row: span 2;
}


/* ===================================================
   FAQ — ACCORDION
   =================================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid #eee;
  margin-bottom: var(--space-sm);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--space-md);
  cursor: pointer;
  transition: color var(--transition-fast);
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-black);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 86, 137, 0.08);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  font-size: 1.2rem;
  color: var(--color-primary);
}

.faq-item.active .faq-question .faq-icon {
  background: var(--color-primary);
  color: var(--color-white);
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 var(--space-md);
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 0 var(--space-md) var(--space-lg);
}

.faq-answer p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-secondary);
}


/* ===================================================
   CONTACT
   =================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-form {
  background: var(--color-white);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-black);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid #e0e0e0;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-secondary);
  transition: border-color var(--transition-fast);
  background: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 86, 137, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.contact-info-card {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-accent);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  transition: all var(--transition-base);
}

.contact-info-card:hover {
  background: var(--color-white);
  box-shadow: var(--shadow-card);
}

.contact-info-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.contact-info-text h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.contact-info-text p {
  font-size: 0.9rem;
}

.map-container {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  margin-top: var(--space-xl);
}

.map-container iframe {
  width: 100%;
  height: 350px;
  border: 0;
}


/* ===================================================
   TECHNOLOGY TEASER
   =================================================== */
.technology-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.video-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}


/* ===================================================
   FOOTER
   =================================================== */
.site-footer {
  background: var(--gradient-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-4xl) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  margin-top: var(--space-md);
  line-height: 1.7;
}

.footer-brand img {
  height: 40px;
  filter: brightness(0) invert(1);
  margin-bottom: var(--space-md);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 0.95rem;
  margin-bottom: var(--space-lg);
  position: relative;
  padding-bottom: var(--space-sm);
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: var(--color-primary-light);
  border-radius: 2px;
}

.footer-col a {
  display: block;
  padding: 5px 0;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-white);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-xl) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.85rem;
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  color: rgba(255, 255, 255, 0.5);
  transition: all var(--transition-base);
  font-size: 1rem;
}

.footer-social a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}


/* ===================================================
   WHATSAPP FLOATING BUTTON
   =================================================== */
.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
}

.whatsapp-float a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: var(--color-whatsapp);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  transition: all var(--transition-base);
}

.whatsapp-float a:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

.whatsapp-float svg {
  width: 30px;
  height: 30px;
  fill: white;
}

.whatsapp-pulse {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 16px;
  height: 16px;
  background: #ff4444;
  border-radius: 50%;
  border: 2px solid white;
  animation: pulse-ring 1.5s infinite;
}

@keyframes pulse-ring {
  0% {
    transform: scale(1);
    opacity: 1;
  }

  50% {
    transform: scale(1.3);
    opacity: 0.7;
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}


/* ===================================================
   LIGHTBOX
   =================================================== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  max-width: 90%;
  max-height: 90vh;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.lightbox-content img,
.lightbox-content video {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: var(--radius-full);
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}


/* ===================================================
   ANIMATIONS
   =================================================== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
}

.slide-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}


/* ===================================================
   RESPONSIVE — TABLET
   =================================================== */
@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }

  .product-hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

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

  .gallery-item.gallery-large {
    grid-column: span 2;
    grid-row: span 1;
  }
}


/* ===================================================
   RESPONSIVE — MOBILE
   =================================================== */
@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }

  .container,
  .container-wide {
    padding: 0 var(--space-md);
  }

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

  /* Mobile Nav */
  .mobile-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 85%;
    max-width: 380px;
    height: 100vh;
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-base);
    overflow-y: auto;
    z-index: 1050;
  }

  .main-nav.open {
    right: 0;
  }

  .nav-links {
    flex-direction: column;
    gap: 0;
  }

  .nav-link {
    color: var(--color-secondary) !important;
    padding: 14px 16px;
    border-bottom: 1px solid #f0f0f0;
    border-radius: 0;
  }

  .nav-link:hover,
  .nav-link.active {
    color: var(--color-primary) !important;
    background: rgba(0, 86, 137, 0.05) !important;
  }

  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0;
    padding-left: var(--space-md);
  }

  .lang-selector {
    background: var(--color-accent);
    margin: var(--space-md) 0;
    align-self: flex-start;
    margin-left: 0;
  }

  .lang-btn {
    color: var(--color-secondary);
  }

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

  .header-cta {
    margin-left: 0;
    margin-top: var(--space-md);
  }

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

  /* Mobile overlay */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1040;
  }

  .nav-overlay.active {
    display: block;
  }

  /* Cards */
  .cards-grid {
    grid-template-columns: 1fr;
  }

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

  .stats-bar {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }

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

  .technology-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

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

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  /* Gallery */
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-item.gallery-large {
    grid-column: span 1;
  }

  /* Hero */
  .hero {
    min-height: 500px;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  /* Page hero */
  .page-hero {
    min-height: 280px;
    padding-top: calc(var(--header-height) + var(--space-2xl));
    padding-bottom: var(--space-2xl);
  }

  /* Tech Steps */
  .tech-step {
    grid-template-columns: 1fr;
  }

  .tech-step-number {
    width: 60px;
    height: 60px;
    font-size: 1.4rem;
  }

  /* WhatsApp */
  .whatsapp-float {
    bottom: 20px;
    right: 20px;
  }

  .whatsapp-float a {
    width: 54px;
    height: 54px;
  }

  .whatsapp-float svg {
    width: 26px;
    height: 26px;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.5rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .btn-lg {
    padding: 14px 30px;
    font-size: 0.95rem;
  }

  .stat-number {
    font-size: 2rem;
  }
}

/* ===================================================
   LIGHTBOX & GALLERY NAVIGATION
   =================================================== */
#lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

#lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  position: relative;
  max-width: 90%;
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-content img,
.lightbox-content video {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: white;
  font-size: 40px;
  cursor: pointer;
  z-index: 2010;
  line-height: 1;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  transition: opacity 0.2s;
}

.lightbox-close:hover {
  opacity: 0.7;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: white;
  font-size: 50px;
  cursor: pointer;
  z-index: 2010;
  background: rgba(0, 0, 0, 0.5);
  border: none;
  padding: 10px 15px;
  border-radius: 4px;
  transition: background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.lightbox-nav:hover {
  background: rgba(0, 0, 0, 0.8);
}

.lightbox-prev {
  left: 20px;
}

.lightbox-next {
  right: 20px;
}

/* Optional title inside lightbox */
.lightbox-caption {
  position: absolute;
  bottom: -40px;
  left: 0;
  width: 100%;
  text-align: center;
  color: white;
  font-size: 1rem;
  letter-spacing: 0.05em;
  font-family: var(--font-heading);
}