/* ============================================
   SYMBIO - SOLUCIONES CIENT�FICAS
   CSS Premium Design
   ============================================ */

/* ============================================
   VARIABLES Y RESET
   ============================================ */
:root {
  /* Colors */
  --color-primary: #7bc200;
  --color-primary-dark: #69a600;
  --color-secondary: #1e40af;
  --color-white: #ffffff;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-600: #6b7280;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Typography */
  --font-family:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 36px;
  --font-size-4xl: 48px;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 80px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

/* ============================================
   ANIMACIONES SCROLL NATIVAS (reemplazo AOS)
   ============================================ */

.scroll-animate {
  opacity: 0;
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate.animated {
  opacity: 1;
  transform: none;
}

/* Fade up */
.fade-up {
  transform: translateY(30px);
}

/* Fade right */
.fade-right {
  transform: translateX(-30px);
}

/* Fade left */
.fade-left {
  transform: translateX(30px);
}

/* Zoom in */
.zoom-in {
  transform: scale(0.9);
}

/* Animacion escalonada para grids */
.scroll-animate:nth-child(1) { transition-delay: 0ms; }
.scroll-animate:nth-child(2) { transition-delay: 50ms; }
.scroll-animate:nth-child(3) { transition-delay: 100ms; }
.scroll-animate:nth-child(4) { transition-delay: 150ms; }
.scroll-animate:nth-child(5) { transition-delay: 200ms; }
.scroll-animate:nth-child(6) { transition-delay: 250ms; }
.scroll-animate:nth-child(7) { transition-delay: 300ms; }
.scroll-animate:nth-child(8) { transition-delay: 350ms; }
.scroll-animate:nth-child(9) { transition-delay: 400ms; }
.scroll-animate:nth-child(10) { transition-delay: 450ms; }
.scroll-animate:nth-child(11) { transition-delay: 500ms; }
.scroll-animate:nth-child(12) { transition-delay: 550ms; }

/* Dark Theme Variables */
[data-theme="dark"] {
  /* Colors */
  --color-primary: #7bc200;
  --color-primary-dark: #69a600;
  --color-secondary: #1e40af;
  --color-white: #111827;
  --color-gray-50: #1f2937;
  --color-gray-100: #374151;
  --color-gray-200: #4b5563;
  --color-gray-300: #6b7280;
  --color-gray-600: #d1d5db;
  --color-gray-800: #e5e7eb;
  --color-gray-900: #f3f4f6;

  /* Shadows for dark mode */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

/* Dark Theme Specific Styles */
[data-theme="dark"] .service-card {
  background-color: #1f2937;
  border-color: #374151;
}

[data-theme="dark"] .product-card {
  background-color: #1f2937;
}

[data-theme="dark"] .feature-card {
  background-color: #1f2937;
}

[data-theme="dark"] .feature-icon {
  background-color: #374151;
}

[data-theme="dark"] .certification-item {
  background-color: #1f2937;
}

/* Footer Dark Theme */
[data-theme="dark"] .footer {
  background-color: #111827;
  color: #d1d5db;
}

[data-theme="dark"] .footer-title {
  color: #f1f5f9;
}

[data-theme="dark"] .footer-description,
[data-theme="dark"] .footer-links a,
[data-theme="dark"] .footer-contact li,
[data-theme="dark"] .footer-copyright,
[data-theme="dark"] .footer-legal a {
  color: #9ca3af;
}

[data-theme="dark"] .footer-links a:hover,
[data-theme="dark"] .footer-contact a:hover,
[data-theme="dark"] .footer-legal a:hover {
  color: var(--color-primary);
}

[data-theme="dark"] .social-link {
  background-color: #1f2937;
  color: #9ca3af;
}

[data-theme="dark"] .social-link:hover {
  background-color: var(--color-primary);
  color: white;
}

[data-theme="dark"] .social-link {
  background-color: #1f2937;
  color: #9ca3af;
}

[data-theme="dark"] .social-link:hover {
  background-color: var(--color-primary);
  color: white;
}

[data-theme="dark"] .footer-bottom {
  border-top-color: #1f2937;
}

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

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-family);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* Lazy Loading Styles */
img[loading="lazy"] {
  background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
  opacity: 0;
  transition: opacity 0.4s ease-in-out;
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* Placeholder mientras carga */
img[loading="lazy"]:not(.loaded) {
  min-height: 200px;
}

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

ul {
  list-style: none;
}

/* ============================================
   CONTAINER
   ============================================ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

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

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 120px;
}

.logo a {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo-text {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.logo-subtitle {
  font-size: 11px;
  font-weight: 500;
  color: #4b5563; /* Mejorado de gray-600 para mejor contraste */
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.logo-img {
  height: 100px;
  width: auto;
}

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

.nav-link {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-gray-800);
  padding: var(--spacing-xs) 0;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition-base);
}

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

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

/* ============================================
   DROPDOWN NAVIGATION
   ============================================ */
.nav-item.has-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.nav-dropdown-toggle .dropdown-arrow {
  font-size: 10px;
  transition: transform var(--transition-base);
}

.nav-item.has-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-sm) 0;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 100;
  margin-top: 8px;
}

.nav-dropdown::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid var(--color-white);
}

.nav-item.has-dropdown:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
}

.nav-dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-gray-800);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.nav-dropdown-item:hover {
  background-color: var(--color-gray-50);
  color: var(--color-primary);
  padding-left: calc(var(--spacing-md) + 4px);
}

.nav-dropdown-item i {
  margin-right: 8px;
  color: var(--color-primary);
}

/* Dark theme dropdown */
[data-theme="dark"] .nav-dropdown {
  background-color: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
}

[data-theme="dark"] .nav-dropdown::before {
  border-bottom-color: var(--color-gray-50);
}

[data-theme="dark"] .nav-dropdown-item:hover {
  background-color: var(--color-gray-100);
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-gray-800);
  border-radius: 2px;
  transition: var(--transition-base);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 12px 24px;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  border: 2px solid transparent;
  text-align: center;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

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

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

.btn-outline-white {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

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

.btn-lg {
  padding: 16px 32px;
  font-size: var(--font-size-lg);
}

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  font-size: 20px;
  color: var(--color-gray-800);
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.theme-toggle:hover {
  background-color: var(--color-gray-100);
  transform: rotate(20deg);
}

.theme-toggle i {
  transition: var(--transition-base);
}

[data-theme="dark"] .theme-toggle .fa-sun {
  display: inline-block;
}

[data-theme="dark"] .theme-toggle .fa-moon {
  display: none;
}

[data-theme="light"] .theme-toggle .fa-sun,
:root:not([data-theme]) .theme-toggle .fa-sun {
  display: none;
}

[data-theme="light"] .theme-toggle .fa-moon,
:root:not([data-theme]) .theme-toggle .fa-moon {
  display: inline-block;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  margin-top: 80px;
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(
    135deg,
    var(--color-white) 0%,
    var(--color-gray-50) 100%
  );
  position: relative;
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-text {
  animation: fadeInUp 0.8s ease;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-gray-200);
}

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

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-number::after {
  content: "+";
  margin-left: 2px;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  font-weight: 500;
}

.hero-image {
  animation: fadeInRight 0.8s ease;
  animation-delay: 0.2s;
  animation-fill-mode: both;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.hero-image-wrapper img {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

.hero-image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(123, 194, 0, 0.1) 0%,
    rgba(30, 64, 175, 0.1) 100%
  );
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 24px;
  color: var(--color-primary);
  animation: bounce 2s infinite;
}

/* ============================================
   SECTIONS
   ============================================ */
section {
  padding: var(--spacing-3xl) 0;
}

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

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
  background-color: var(--color-white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: var(--transition-base);
  cursor: pointer;
}

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

.service-icon {
  width: 64px;
  height: 64px;
  background-color: var(--color-gray-50);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 28px;
  color: var(--color-primary);
  transition: var(--transition-base);
}

.service-card:hover .service-icon {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-sm);
}

.service-description {
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.service-link {
  color: var(--color-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.service-link:hover {
  gap: 12px;
}

/* ============================================
   PRODUCTS SECTION
   ============================================ */
.products {
  background-color: var(--color-gray-50);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, 284px);
  gap: var(--spacing-md);
  justify-content: center;
}

.product-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition-base);
  max-width: 284px;
  max-height: 483px;
  width: 100%;
}

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

.product-image {
  position: relative;
  overflow: hidden;
  height: 240px;
}

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

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

.product-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0%,
    rgba(0, 0, 0, 0.8) 100%
  );
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: var(--spacing-md);
  opacity: 0;
  transition: var(--transition-base);
}

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

.product-btn {
  background-color: var(--color-white);
  color: var(--color-primary);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.product-content {
  padding: var(--spacing-md);
}

.product-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-gray-900);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-content {
  overflow: hidden;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
  background-color: var(--color-gray-50);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-xl);
}

.feature-icon {
  width: 80px;
  height: 80px;
  background-color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  font-size: 32px;
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--color-gray-600);
  line-height: 1.8;
}

/* ============================================
   CERTIFICATIONS SECTION
   ============================================ */
.certifications {
  background-color: var(--color-white);
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

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

.certification-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  transition: var(--transition-base);
}

.certification-logo i {
  font-size: 48px;
  color: var(--color-gray-400);
  transition: var(--transition-base);
}

.certification-item:hover .certification-logo i {
  color: var(--color-primary);
  transform: scale(1.1);
}

.certification-logo p {
  font-weight: 600;
  color: var(--color-gray-700);
}

.certifications-text {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.certifications-text p {
  color: var(--color-gray-600);
  font-size: var(--font-size-lg);
  line-height: 1.8;
}

/* ============================================
   CTA BANNER
   ============================================ */
.cta-banner {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
  padding: var(--spacing-3xl) 0;
  text-align: center;
  color: var(--color-white);
}

.cta-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.cta-subtitle {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--spacing-3xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-logo {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: var(--spacing-sm);
}

.footer-logo .logo-img {
  height: 60px;
  width: auto;
}

.footer-description {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  color: var(--color-gray-400);
}

.footer-title {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
}

.footer-links a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

.footer-contact i {
  color: var(--color-primary);
  width: 20px;
  flex-shrink: 0;
}

.footer-contact a:hover {
  color: var(--color-primary);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: var(--color-gray-800);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-size: 18px;
}

.social-link:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid var(--color-gray-800);
  padding-top: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.footer-legal {
  display: flex;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.footer-legal a {
  color: var(--color-gray-500);
}

.footer-legal a:hover {
  color: var(--color-primary);
}

.footer-legal span {
  color: var(--color-gray-700);
}

/* ============================================
   FLOATING ELEMENTS
   ============================================ */
.whatsapp-float {
  position: fixed;
  bottom: 80px;
  right: 24px;
  width: 60px;
  height: 60px;
  background-color: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 32px;
  box-shadow: var(--shadow-xl);
  z-index: 999;
  transition: var(--transition-base);
  animation: pulse 2s infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 20px 40px rgba(37, 211, 102, 0.4);
}

.scroll-top {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 50px;
  height: 50px;
  background-color: var(--color-primary);
  border: none;
  border-radius: 50%;
  color: var(--color-white);
  font-size: 20px;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
  z-index: 998;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-4px);
}

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
  }
}

/* AOS Animation styles will be loaded from CDN */
[data-aos] {
  opacity: 0;
  transition-property: opacity, transform;
}

[data-aos].aos-animate {
  opacity: 1;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .hero-image {
    order: -1;
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

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

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

/* Mobile */
@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--color-white);
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
  }

  .nav.active {
    left: 0;
  }

  .nav-list {
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
  }

  .nav-link {
    font-size: var(--font-size-lg);
    width: 100%;
    padding: var(--spacing-sm) 0;
  }

  /* Dropdown Mobile */
  .nav-item.has-dropdown {
    position: static;
  }

  .nav-dropdown {
    position: static;
    transform: none;
    min-width: 100%;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    margin-top: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .nav-dropdown::before {
    display: none;
  }

  .nav-item.has-dropdown.active .nav-dropdown,
  .nav-item.has-dropdown.dropdown-open .nav-dropdown {
    max-height: 200px;
    padding: var(--spacing-sm) 0;
  }

  /* Rotar flecha cuando está abierto */
  .nav-item.has-dropdown.dropdown-open .dropdown-arrow {
    transform: rotate(180deg);
  }

  .nav-dropdown-item {
    padding-left: var(--spacing-lg);
  }

  .nav-dropdown-item:hover {
    padding-left: calc(var(--spacing-lg) + 4px);
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
  }

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

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

  .header-actions .btn {
    display: none;
  }

  .hero {
    padding: var(--spacing-2xl) 0;
  }

  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

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

  .cta-title {
    font-size: var(--font-size-2xl);
  }

  .cta-actions {
    flex-direction: column;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .whatsapp-float {
    bottom: 90px;
    right: 16px;
    width: 50px;
    height: 50px;
    font-size: 24px;
  }

  .scroll-top {
    bottom: 16px;
    left: 16px;
    width: 45px;
    height: 45px;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  :root {
    --font-size-base: 14px;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .hero-image-wrapper img {
    height: 300px;
  }

  .btn-lg {
    padding: 14px 24px;
    font-size: var(--font-size-base);
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
  text-align: center;
}

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

.bg-gray {
  background-color: var(--color-gray-50);
}

.mt-0 {
  margin-top: 0;
}
.mt-1 {
  margin-top: var(--spacing-xs);
}
.mt-2 {
  margin-top: var(--spacing-sm);
}
.mt-3 {
  margin-top: var(--spacing-md);
}
.mt-4 {
  margin-top: var(--spacing-lg);
}

.mb-0 {
  margin-bottom: 0;
}
.mb-1 {
  margin-bottom: var(--spacing-xs);
}
.mb-2 {
  margin-bottom: var(--spacing-sm);
}
.mb-3 {
  margin-bottom: var(--spacing-md);
}
.mb-4 {
  margin-bottom: var(--spacing-lg);
}