/* ==========================================================================
   VARIABLES Y SISTEMA DE DISEÑO (MATERIAL DESIGN 3 INSPIRADO)
   ========================================================================== */
:root {
  /* Fuentes Premium */
  --md-font-display: 'Outfit', sans-serif;
  --md-font-body: 'Inter', sans-serif;

  /* Tema Claro Premium (Brillo y Limpieza Extrema) */
  --md-sys-color-primary: #0066cc; /* Azul eléctrico profesional */
  --md-sys-color-primary-container: #e6f0ff;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-secondary: #00cc99; /* Esmeralda tecnológico */
  --md-sys-color-secondary-container: #e6fff7;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-error: #ff3b30;
  --md-sys-color-error-container: #ffeceb;
  --md-sys-color-background: #fdfdfd; /* Blanco casi puro */
  --md-sys-color-surface: #ffffff;
  --md-sys-color-surface-variant: #f4f5f7;
  --md-sys-color-surface-container: #ffffff;
  --md-sys-color-on-background: #1a1c23; /* Gris plomo oscuro */
  --md-sys-color-on-surface: #1a1c23;
  --md-sys-color-on-surface-variant: #5e6372;
  --md-sys-color-outline: #c4c8d3;
  --md-sys-color-outline-variant: #e5e7eb;
  --md-sys-color-accent: #ffcc00; /* Acento oro tecnológico */
  --md-sys-color-accent-hover: #e6b800;

  /* Premium Sombras (Difuminadas y elegantes) */
  --elevation-1: 0px 4px 20px rgba(0, 0, 0, 0.05);
  --elevation-2: 0px 8px 30px rgba(0, 102, 204, 0.08);
  --elevation-3: 0px 12px 40px rgba(0, 102, 204, 0.12);
  --elevation-4: 0px 16px 50px rgba(0, 102, 204, 0.16);

  /* Bordes y Transiciones fluidas */
  --radius-xs: 6px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-normal: 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-slow: 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Tema Oscuro Premium */
body.dark-mode {
  --md-sys-color-primary: #3399ff; /* Azul neón vibrante */
  --md-sys-color-primary-container: #002244;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-secondary: #00ffcc; /* Cyan brillante */
  --md-sys-color-secondary-container: #003329;
  --md-sys-color-on-secondary: #000000;
  --md-sys-color-error: #ff453a;
  --md-sys-color-error-container: #5c0000;
  --md-sys-color-background: #090b10; /* Ultra oscuro espacial */
  --md-sys-color-surface: #11141d; /* Superficie elevada */
  --md-sys-color-surface-variant: #181d29;
  --md-sys-color-surface-container: #151822;
  --md-sys-color-on-background: #f0f2f8;
  --md-sys-color-on-surface: #f0f2f8;
  --md-sys-color-on-surface-variant: #a1a6b5;
  --md-sys-color-outline: #3d4355;
  --md-sys-color-outline-variant: #252a38;
  --md-sys-color-accent: #ffd60a;
  --md-sys-color-accent-hover: #ffcc00;

  /* Sombras oscuras con brillo de neón (Glow effects) */
  --elevation-1: 0px 4px 20px rgba(0, 0, 0, 0.6);
  --elevation-2: 0px 8px 30px rgba(51, 153, 255, 0.15);
  --elevation-3: 0px 12px 40px rgba(51, 153, 255, 0.25);
  --elevation-4: 0px 16px 50px rgba(0, 255, 204, 0.3);
}

/* Glassmorphism Utilities */
.glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--elevation-2);
}

body.dark-mode .glass {
  background: rgba(17, 20, 29, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* ==========================================================================
   RESET Y REGLAS GLOBALES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* Offset para el header sticky */
  font-size: 16px;
}

body {
  font-family: var(--md-font-body);
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* Skip link para accesibilidad */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--md-sys-color-accent);
  color: #000000;
  padding: 8px 16px;
  z-index: 10000;
  transition: top var(--transition-fast);
  font-weight: bold;
}
.skip-link:focus {
  top: 0;
}

/* Contenedor */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Padding de secciones */
.section-padding {
  padding: 80px 0;
}

@media (max-width: 768px) {
  .section-padding {
    padding: 60px 0;
  }
}

/* Titulares de sección comunes */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}
.section-subtitle {
  font-family: var(--md-font-display);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--md-sys-color-primary);
  display: block;
  margin-bottom: 8px;
}
.section-title {
  font-family: var(--md-font-display);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--md-sys-color-on-background);
  margin-bottom: 16px;
}
.section-header p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 1.1rem;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.75rem;
  }
}

/* ==========================================================================
   COMPONENTES: BOTONES, TARJETAS, ONDAS DE EFECTO
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--md-font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.btn:active {
  transform: scale(0.98);
}

.btn-filled {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--elevation-1);
}
.btn-filled:hover {
  background-color: #0274ae;
  box-shadow: var(--elevation-2);
}

.btn-outlined {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-primary);
}
.btn-outlined:hover {
  background-color: var(--md-sys-color-primary-container);
}

.btn-secondary {
  background-color: var(--md-sys-color-secondary);
  color: var(--md-sys-color-on-secondary);
  box-shadow: var(--elevation-1);
}
.btn-secondary:hover {
  background-color: #0b7f74;
  box-shadow: var(--elevation-2);
}

/* Ripple de Material */
.ripple {
  position: absolute;
  background: rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  transform: scale(0);
  animation: ripple-effect 0.6s linear;
  pointer-events: none;
}
@keyframes ripple-effect {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Tarjetas (Cards) */
.card {
  background-color: var(--md-sys-color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--md-sys-color-outline-variant);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}
.card-elevated {
  box-shadow: var(--elevation-1);
}
.card-elevated:hover {
  box-shadow: var(--elevation-3);
  transform: translateY(-4px);
}

/* Toast de Notificación */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.toast {
  background-color: var(--md-sys-color-on-background);
  color: var(--md-sys-color-background);
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  box-shadow: var(--elevation-3);
  font-family: var(--md-font-body);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 12px;
  transform: translateY(20px);
  opacity: 0;
  animation: toast-in var(--transition-normal) forwards;
}
@keyframes toast-in {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ==========================================================================
   HEADER Y MENÚ DE NAVEGACIÓN
   ========================================================================== -->
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  z-index: 1000;
  background-color: rgba(248, 250, 252, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), height var(--transition-normal);
}

body.dark-mode .header {
  background-color: rgba(11, 15, 25, 0.8);
}

.header.scrolled {
  height: 70px;
  background-color: var(--md-sys-color-background);
  border-color: var(--md-sys-color-outline-variant);
  box-shadow: var(--elevation-1);
}

.navbar {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  transition: transform var(--transition-fast);
}
.logo:hover {
  transform: scale(1.02);
}
.brand-logo-svg {
  height: 36px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-family: var(--md-font-display);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}
.nav-link:hover {
  color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary-container);
}

.theme-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--md-sys-color-on-surface-variant);
  padding: 8px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}
.theme-toggle-btn:hover {
  background-color: var(--md-sys-color-surface-variant);
}

/* Iconos de Tema */
.theme-toggle-btn .sun-icon {
  display: block;
}
.theme-toggle-btn .moon-icon {
  display: none;
}
body.dark-mode .theme-toggle-btn .sun-icon {
  display: none;
}
body.dark-mode .theme-toggle-btn .moon-icon {
  display: block;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--md-sys-color-on-background);
  position: relative;
  transition: background-color var(--transition-fast);
}
.hamburger::before, .hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--md-sys-color-on-background);
  left: 0;
  transition: transform var(--transition-fast), top var(--transition-fast);
}
.hamburger::before { top: -6px; }
.hamburger::after { top: 6px; }

/* Hamburger transformado (Abierto) */
.nav-toggle[aria-expanded="true"] .hamburger {
  background-color: transparent;
}
.nav-toggle[aria-expanded="true"] .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

@media (max-width: 992px) {
  .nav-toggle {
    display: block;
  }
  .nav-container {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--md-sys-color-background);
    padding: 32px 24px;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    border-top: 1px solid var(--md-sys-color-outline-variant);
  }
  .nav-container::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 65%;
    height: 100%;
    background-image: url('file:///C:/Users/ext_jmena/.gemini/antigravity/brain/ae1b2c07-9787-4d47-aa88-7d6efc01ad87/slider_industrial_plant_1780341609424.png');
    background-size: cover;
    background-position: center;
    z-index: -1;
    opacity: 0.6;
    mask-image: linear-gradient(to right, transparent 0%, black 40%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 40%);
    pointer-events: none;
  }
  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }
  .nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 1.1rem;
  }
  .theme-toggle-btn {
    align-self: flex-start;
    padding: 12px;
  }
  .nav-btn {
    width: 100%;
    margin-top: 16px;
  }
  
  .nav-container.active {
    transform: translateX(0);
  }
}

/* ==========================================================================
   HERO SECTION (DISEÑO Y GRID)
   ========================================================================== */
.hero {
  padding-top: 140px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  font-family: var(--md-font-display);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--md-font-display);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--md-sys-color-on-background);
  margin-bottom: 20px;
}
.hero-title span {
  color: var(--md-sys-color-primary);
}

.hero-description {
  font-size: 1.15rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 36px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 16px;
}
.trust-avatar-group {
  display: flex;
}
.trust-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 3px solid var(--md-sys-color-surface);
  margin-left: -12px;
}
.trust-avatar:first-child {
  margin-left: 0;
}
.trust-text {
  font-size: 0.9rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.4;
}

.hero-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-image-bg {
  position: absolute;
  top: 10%;
  left: 10%;
  width: 90%;
  height: 90%;
  background: linear-gradient(135deg, var(--md-sys-color-primary-container) 0%, var(--md-sys-color-secondary-container) 100%);
  border-radius: var(--radius-xl);
  z-index: 1;
}
.hero-image-card {
  position: relative;
  z-index: 2;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--elevation-3);
  background-color: var(--md-sys-color-surface-variant);
  width: 100%;
  aspect-ratio: 4 / 3;
}

/* Slider Base */
.hero-slider-container {
  position: relative;
  width: 100%;
  height: 100%;
}
.hero-slides {
  width: 100%;
  height: 100%;
  position: relative;
}
.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  z-index: 1;
}
.slide.active {
  opacity: 1;
  z-index: 2;
}
.slide-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Slider Controls */
.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
  z-index: 10;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.slider-btn:hover {
  transform: translateY(-50%) scale(1.1);
  background: rgba(255, 255, 255, 0.3);
}
.slider-btn.prev { left: 16px; }
.slider-btn.next { right: 16px; }

/* Slider Dots */
.slider-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}
.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.slider-dot.active {
  background: #fff;
  transform: scale(1.3);
}

.hero-badge-float {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background-color: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--elevation-2);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 3;
}
.badge-float-icon {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-secondary);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.badge-float-title {
  font-family: var(--md-font-display);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.2;
}
.badge-float-subtitle {
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
}

@media (max-width: 992px) {
  .hero {
    padding-top: 110px;
    padding-bottom: 50px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-title {
    font-size: 2.75rem;
  }
}

/* ==========================================================================
   SECCIÓN DE ESTADÍSTICAS
   ========================================================================== */
.stats {
  background-color: var(--md-sys-color-surface-variant);
  padding: 40px 0;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item {
  padding: 16px;
}
.stat-number {
  font-family: var(--md-font-display);
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--md-sys-color-primary);
  line-height: 1.1;
  margin-bottom: 8px;
}
.stat-label {
  font-weight: 700;
  font-size: 1rem;
  color: var(--md-sys-color-on-background);
  margin-bottom: 4px;
}
.stat-desc {
  font-size: 0.8rem;
  color: var(--md-sys-color-on-surface-variant);
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SECCIÓN DE SERVICIOS
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.service-image-wrapper {
  overflow: hidden;
  height: 200px;
  background-color: var(--md-sys-color-surface-variant);
}
.service-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}
.service-card:hover .service-image-wrapper img {
  transform: scale(1.05);
}

.service-icon {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-primary);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--elevation-2);
  margin-left: 24px;
  margin-top: -28px;
  z-index: 2;
  position: relative;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.service-card:hover .service-icon {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.service-title {
  font-family: var(--md-font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin: 24px 24px 12px;
  color: var(--md-sys-color-on-background);
}
.service-desc {
  font-size: 0.95rem;
  color: var(--md-sys-color-on-surface-variant);
  margin: 0 24px 24px;
  flex-grow: 1;
}

.service-features {
  padding: 0 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}
.service-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface);
}
.service-feature-item svg {
  color: var(--md-sys-color-secondary);
  flex-shrink: 0;
  margin-top: 2px;
}

.service-btn {
  margin: 20px 24px 24px;
}

.special-service {
  border-color: var(--md-sys-color-secondary);
}
.special-service .service-icon {
  color: var(--md-sys-color-secondary);
}
.special-service:hover .service-icon {
  background-color: var(--md-sys-color-secondary);
}

@media (max-width: 992px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SECCIÓN DE CERTIFICACIONES
   ========================================================================== */
.certifications {
  background-color: var(--md-sys-color-surface-variant);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cert-card {
  background-color: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--elevation-1);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--elevation-2);
}

.cert-icon-container {
  width: 56px;
  height: 56px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.cert-card:nth-child(even) .cert-icon-container {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-secondary);
}

.cert-title {
  font-family: var(--md-font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.cert-org {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--md-sys-color-primary);
  margin-bottom: 16px;
}
.cert-card:nth-child(even) .cert-org {
  color: var(--md-sys-color-secondary);
}
.cert-desc {
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
}

@media (max-width: 992px) {
  .certs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 576px) {
  .certs-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SECCIÓN DE SECTORES PRODUCTIVOS
   ========================================================================== */
.sectors-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 320px;
  gap: 24px;
}

.sector-card {
  position: relative;
  height: 100%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--elevation-2);
}

.sector-card:nth-child(1) { grid-column: span 8; }
.sector-card:nth-child(2) { grid-column: span 4; }
.sector-card:nth-child(3) { grid-column: span 5; }
.sector-card:nth-child(4) { grid-column: span 7; }
.sector-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.sector-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.95) 0%, rgba(15, 23, 42, 0.4) 60%, rgba(15, 23, 42, 0) 100%);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #ffffff;
  transition: background var(--transition-normal);
}
.sector-icon {
  width: 36px;
  height: 36px;
  background-color: var(--md-sys-color-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  transform: translateY(12px);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}
.sector-card .sector-title {
  font-family: var(--md-font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
  transform: translateY(12px);
  transition: transform var(--transition-normal);
}
.sector-card .sector-desc {
  font-size: 0.85rem;
  opacity: 0.85;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), opacity var(--transition-normal);
}

.sector-card:hover img {
  transform: scale(1.05);
}
.sector-card:hover .sector-overlay {
  background: linear-gradient(to top, rgba(15, 23, 42, 0.95) 0%, rgba(15, 23, 42, 0.6) 80%);
}
.sector-card:hover .sector-icon {
  transform: translateY(0);
  opacity: 1;
}
.sector-card:hover .sector-title {
  transform: translateY(0);
}
.sector-card:hover .sector-desc {
  max-height: 80px;
  opacity: 1;
  margin-top: 6px;
}

@media (max-width: 992px) {
  .sectors-grid {
    grid-template-columns: repeat(1, 1fr);
    grid-auto-rows: 280px;
  }
  .sector-card:nth-child(n) { grid-column: span 1; }
}
@media (max-width: 576px) {
  .sectors-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 240px;
  }
  .sector-card:nth-child(n) { grid-column: span 1; }
}

/* ==========================================================================
   COTIZADOR INTERACTIVO PASO A PASO
   ========================================================================== */
.cotizador-section {
  background-color: var(--md-sys-color-primary-container);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  transition: background-color var(--transition-normal);
}
body.dark-mode .cotizador-section {
  background-color: rgba(14, 165, 233, 0.1);
}

.cotizador-card {
  padding: 40px;
  background-color: var(--md-sys-color-surface);
  max-width: 800px;
  margin: 0 auto;
}

/* Indicador de pasos */
.cotizador-progress {
  display: flex;
  justify-content: space-between;
  position: relative;
  margin-bottom: 48px;
}
.cotizador-progress-bar {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  width: 100%;
  height: 4px;
  background-color: var(--md-sys-color-outline-variant);
  z-index: 1;
}
.cotizador-progress-fill {
  width: 0%;
  height: 100%;
  background-color: var(--md-sys-color-primary);
  transition: width var(--transition-normal);
}
.step-indicator {
  width: 32px;
  height: 32px;
  background-color: var(--md-sys-color-surface);
  border: 2px solid var(--md-sys-color-outline);
  color: var(--md-sys-color-on-surface-variant);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--md-font-display);
  position: relative;
  z-index: 2;
  transition: border-color var(--transition-normal), background-color var(--transition-normal), color var(--transition-normal);
}
.step-indicator.active {
  border-color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}
.step-indicator.completed {
  border-color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-primary);
}

/* Pasos */
.cotizador-step {
  display: none;
}
.cotizador-step.active {
  display: block;
  animation: fadeIn var(--transition-normal) forwards;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.step-title {
  font-family: var(--md-font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 24px;
}

/* Paso 1: Opciones de instalación */
.install-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
.install-option-card {
  border: 1px solid var(--md-sys-color-outline);
  background-color: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  font-family: var(--md-font-display);
  font-weight: 600;
  font-size: 1.05rem;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}
.install-option-card svg {
  color: var(--md-sys-color-on-surface-variant);
  transition: color var(--transition-fast);
}
.install-option-card:hover {
  border-color: var(--md-sys-color-primary);
}
.install-option-card.selected {
  border-color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  box-shadow: var(--elevation-1);
}
.install-option-card.selected svg {
  color: var(--md-sys-color-primary);
}

@media (max-width: 576px) {
  .install-options {
    grid-template-columns: 1fr;
  }
}

/* Paso 2: Rango de superficie */
.range-container {
  padding: 16px 0;
  margin-bottom: 32px;
}
.range-labels {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  font-family: var(--md-font-display);
  font-weight: 800;
  color: var(--md-sys-color-primary);
  margin-bottom: 16px;
}
.range-labels span:first-child {
  font-size: 3rem;
  line-height: 1;
}
.range-labels span:last-child {
  font-size: 1.5rem;
}
.range-slider {
  width: 100%;
  -webkit-appearance: none;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--md-sys-color-outline-variant);
  outline: none;
  margin-bottom: 12px;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background-color: var(--md-sys-color-primary);
  cursor: pointer;
  box-shadow: var(--elevation-2);
  transition: transform var(--transition-fast);
}
.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.range-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background-color: var(--md-sys-color-primary);
  cursor: pointer;
  border: none;
  box-shadow: var(--elevation-2);
  transition: transform var(--transition-fast);
}
.range-slider::-moz-range-thumb:hover {
  transform: scale(1.15);
}
.range-hints {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface-variant);
}

/* Paso 3: Frecuencias y Adicionales */
.freq-options {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}
.freq-btn {
  flex: 1;
  padding: 12px;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--radius-sm);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-fast);
}
.freq-btn:hover {
  border-color: var(--md-sys-color-primary);
}
.freq-btn.selected {
  border-color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
}

@media (max-width: 576px) {
  .freq-options {
    flex-direction: column;
  }
}

.addons-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.addon-card {
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}
.addon-card input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--md-sys-color-primary);
  margin-top: 2px;
  flex-shrink: 0;
}
.addon-text {
  display: flex;
  flex-direction: column;
}
.addon-title {
  font-weight: 700;
  font-size: 0.95rem;
}
.addon-desc {
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
}
.addon-card:hover {
  border-color: var(--md-sys-color-outline);
}
.addon-card.selected {
  border-color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-surface-variant);
}

@media (max-width: 768px) {
  .addons-options {
    grid-template-columns: 1fr;
  }
}

/* Paso 4: Resultados */
.result-container {
  text-align: center;
  padding: 16px 0;
}
.result-badge {
  display: inline-block;
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-secondary);
  font-weight: 700;
  font-size: 0.8rem;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}
.result-price-range {
  font-family: var(--md-font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--md-sys-color-on-background);
  line-height: 1;
  margin-bottom: 4px;
}
.result-price-period {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 24px;
}
.result-summary-box {
  background-color: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-md);
  padding: 20px;
  max-width: 480px;
  margin: 0 auto 32px;
  text-align: left;
}
.result-summary-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--md-sys-color-outline);
  padding-bottom: 4px;
}
.summary-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.summary-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}
.summary-item span:first-child {
  color: var(--md-sys-color-on-surface-variant);
}
.summary-item span:last-child {
  font-weight: 700;
}

.cotizador-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 32px;
}

/* ==========================================================================
   SECCIÓN DE TESTIMONIOS
   ========================================================================== */
.testimonials {
  position: relative;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.testimonial-card {
  padding: 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.quote-icon {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  color: var(--md-sys-color-outline-variant);
  opacity: 0.5;
  z-index: 1;
}

.stars {
  color: var(--md-sys-color-accent);
  font-size: 1.1rem;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
  margin-bottom: 24px;
  font-style: italic;
  flex-grow: 1;
  position: relative;
  z-index: 2;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
  z-index: 2;
}
.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}
.testimonial-card:nth-child(even) .user-avatar {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-secondary);
}
.user-info {
  display: flex;
  flex-direction: column;
}
.user-name {
  font-family: var(--md-font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--md-sys-color-on-surface);
}
.user-role {
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
}

@media (max-width: 992px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }
}

/* ==========================================================================
   CONTACTO, ACORDEÓN DE FAQS Y FORMULARIO
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: start;
}

@media (max-width: 992px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

/* Acordeón FAQs */
.accordion-item {
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}
.accordion-header {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  text-align: left;
  color: var(--md-sys-color-on-background);
  gap: 16px;
}
.accordion-title {
  font-family: var(--md-font-display);
  font-weight: 700;
  font-size: 1.1rem;
}
.accordion-icon {
  color: var(--md-sys-color-on-surface-variant);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}
.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}
.accordion-content {
  padding-bottom: 20px;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Acordeón abierto */
.accordion-header[aria-expanded="true"] .accordion-icon {
  transform: rotate(180deg);
  color: var(--md-sys-color-primary);
}

.faq-section-title {
  font-family: var(--md-font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.channel-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.channel-icon {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.channel-detail h4 {
  font-family: var(--md-font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.channel-detail p {
  font-size: 0.9rem;
  color: var(--md-sys-color-on-surface-variant);
}

/* Formulario con etiquetas flotantes (Floating Labels) */
.card form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.input-field {
  position: relative;
  margin-bottom: 12px;
}
.input-field input,
.input-field select,
.input-field textarea {
  width: 100%;
  padding: 20px 16px 6px;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--radius-sm);
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.input-field textarea {
  min-height: 120px;
  resize: vertical;
}
.input-field label {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--md-sys-color-on-surface-variant);
  transition: transform var(--transition-fast), top var(--transition-fast), font-size var(--transition-fast), color var(--transition-fast);
  pointer-events: none;
  font-size: 0.95rem;
}
.input-field textarea ~ label {
  top: 24px;
  transform: none;
}

/* Efectos de Focus y Populate */
.input-field input:focus,
.input-field select:focus,
.input-field textarea:focus {
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.input-field input:focus ~ label,
.input-field input:not(:placeholder-shown) ~ label,
.input-field select:focus ~ label,
.input-field select:valid ~ label,
.input-field textarea:focus ~ label,
.input-field textarea:not(:placeholder-shown) ~ label {
  top: 6px;
  transform: translateY(0);
  font-size: 0.75rem;
  color: var(--md-sys-color-primary);
}

.input-error {
  display: block;
  font-size: 0.75rem;
  color: var(--md-sys-color-error);
  margin-top: 4px;
  min-height: 16px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.input-field.has-error input,
.input-field.has-error select,
.input-field.has-error textarea {
  border-color: var(--md-sys-color-error);
}
.input-field.has-error .input-error {
  opacity: 1;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding-top: 80px;
  border-top: 1px solid #1e293b;
}
body.dark-mode .footer {
  background-color: #05070f;
  border-color: #111827;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 50px;
  border-bottom: 1px solid #1e293b;
}
body.dark-mode .footer-top {
  border-color: #111827;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--md-font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
}
.footer-logo-icon {
  background-color: var(--md-sys-color-primary);
  color: #ffffff;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-desc {
  font-size: 0.9rem;
  line-height: 1.6;
}
.footer-socials {
  display: flex;
  gap: 12px;
}
.social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: #1e293b;
  color: #cbd5e1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.social-link:hover {
  background-color: var(--md-sys-color-primary);
  color: #ffffff;
}

.footer-column h4 {
  font-family: var(--md-font-display);
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 24px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-links a {
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}
.footer-links a:hover {
  color: #ffffff;
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.85rem;
}
.footer-info p strong {
  color: #ffffff;
}

.footer-bottom {
  padding: 24px 0;
  font-size: 0.85rem;
}
.footer-bottom-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-bottom-links {
  display: flex;
  gap: 24px;
}
.footer-bottom-links a:hover {
  color: #ffffff;
}

@media (max-width: 992px) {
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}
@media (max-width: 576px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom-flex {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   BOTÓN FLOTANTE WHATSAPP
   ========================================================================== */
.whatsapp-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background-color: #25d366;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--elevation-3);
  z-index: 999;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
  animation: pulse 2s infinite;
}
.whatsapp-btn:hover {
  transform: scale(1.1);
  background-color: #20ba5a;
}
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
  }
}

/* ==========================================================================
   ANIMACIONES PREMIUM Y MICRO-INTERACCIONES
   ========================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-slide-up {
  transform: translateY(40px) scale(0.98);
}
.reveal-slide-left {
  transform: translateX(-50px);
}
.reveal-slide-right {
  transform: translateX(50px);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* Float animation para elementos destacados (Ej. Imagen Hero) */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
  100% { transform: translateY(0px); }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* Glow animation para botones premium */
@keyframes glow {
  0% { box-shadow: 0 0 5px rgba(0, 102, 204, 0.2); }
  50% { box-shadow: 0 0 20px rgba(0, 102, 204, 0.6); }
  100% { box-shadow: 0 0 5px rgba(0, 102, 204, 0.2); }
}

body.dark-mode .animate-glow {
  animation: glow 3s infinite alternate;
}