/* ==========================================================================
   CENTRAL CALEFÓN - ESTILOS PRINCIPALES
   Servicio Técnico Gasfíter Certificado SEC a Domicilio - Cobertura Nacional
   ========================================================================== */

:root {
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-primary-dark: #020617;
  
  --color-flame: #ff5e14;
  --color-flame-hover: #e04a05;
  --color-flame-glow: rgba(255, 94, 20, 0.25);
  
  --color-blue-flame: #0284c7;
  --color-blue-cyan: #06b6d4;
  --color-sec-red: #c41230;
  --color-sec-blue: #0a3871;
  --color-whatsapp: #25d366;
  --color-whatsapp-hover: #1ebd5a;
  
  --color-bg-light: #f8fafc;
  --color-bg-card: #ffffff;
  --color-text-main: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-flame: 0 10px 25px -3px rgba(255, 94, 20, 0.35);
  --shadow-whatsapp: 0 10px 25px -3px rgba(37, 211, 102, 0.4);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.18s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-main);
  background-color: var(--color-bg-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

button, input, select, textarea {
  font: inherit;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ==========================================================================
   TOP BAR DE URGENCIA
   ========================================================================== */
.top-bar {
  background: linear-gradient(90deg, #991b1b 0%, #dc2626 50%, #ea580c 100%);
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0;
  position: relative;
  z-index: 1001;
}

.top-bar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.top-bar-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(0, 0, 0, 0.25);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #22c55e;
  border-radius: 50%;
  animation: pulseAnimation 1.5s infinite;
}

@keyframes pulseAnimation {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 7px rgba(34, 197, 94, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.top-bar-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.top-bar-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: opacity var(--transition-fast);
}

.top-bar-link:hover {
  opacity: 0.85;
}

/* ==========================================================================
   CABECERA PRINCIPAL (NAVBAR)
   ========================================================================== */
.site-header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: box-shadow var(--transition-normal);
}

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

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo-img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  transition: transform var(--transition-fast);
}

.brand-logo-wrap:hover .brand-logo-img {
  transform: scale(1.04);
}

.brand-title-box {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
  letter-spacing: -0.5px;
}

.brand-title span {
  color: var(--color-flame);
}

.brand-subtitle {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-sec-red);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Navegación Desktop */
.nav-menu-desktop {
  display: none;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-primary-light);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-flame);
  transition: width var(--transition-fast);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Botón Hamburguesa */
.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 42px;
  height: 42px;
  background: #f1f5f9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 10px 8px;
  transition: background var(--transition-fast);
}

.hamburger-btn:hover {
  background: #e2e8f0;
}

.hamburger-line {
  width: 100%;
  height: 2.5px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ==========================================================================
   MENÚ MÓVIL DESLIZANTE DE IZQUIERDA A DERECHA
   "se deslice de izquierda a derecha, cuando se cierre de derecha a izquierda"
   ========================================================================== */
.mobile-nav-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.mobile-nav-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 85%;
  max-width: 360px;
  height: 100vh;
  background: #ffffff;
  z-index: 2001;
  box-shadow: 10px 0 30px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  /* Estado cerrado: totalmente oculto a la izquierda */
  transform: translateX(-100%);
  transition: transform 0.38s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Estado abierto: se desliza de izquierda a derecha */
.mobile-nav-backdrop.open .mobile-nav-drawer {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-light);
}

.drawer-close-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-primary);
  font-size: 1.25rem;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.drawer-close-btn:hover {
  background: #fee2e2;
  color: #dc2626;
  transform: rotate(90deg);
}

.drawer-body {
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-primary);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.drawer-link i, .drawer-link svg {
  color: var(--color-flame);
  width: 20px;
}

.drawer-link:hover, .drawer-link.active {
  background: #fff7ed;
  color: var(--color-flame);
}

.drawer-sec-badge {
  background: #f8fafc;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.drawer-sec-badge img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  object-position: 16% center;
  border-radius: 50%;
}

.drawer-footer {
  padding: 1.25rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-light);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ==========================================================================
   BOTONES Y ELEMENTOS DE ACCIÓN (CTA)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  line-height: 1.2;
}

.btn-whatsapp {
  background-color: var(--color-whatsapp);
  color: #ffffff;
  box-shadow: var(--shadow-whatsapp);
}

.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -4px rgba(37, 211, 102, 0.5);
  color: #ffffff;
}

.btn-flame {
  background: linear-gradient(135deg, #ff6b00 0%, #ea580c 100%);
  color: #ffffff;
  box-shadow: var(--shadow-flame);
}

.btn-flame:hover {
  background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -4px rgba(234, 88, 12, 0.5);
}

.btn-phone {
  background-color: var(--color-primary);
  color: #ffffff;
}

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

.btn-outline-white {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(6px);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: #ffffff;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 0.95rem 1.85rem;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  background: radial-gradient(circle at 80% 20%, #1e293b 0%, #0f172a 60%, #020617 100%);
  color: #ffffff;
  padding: 3.5rem 0 5rem 0;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -150px;
  right: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 107, 0, 0.2) 0%, rgba(2, 132, 199, 0.1) 50%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  color: #fed7aa;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-badge-tag i {
  color: #ffedd5;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 1.25rem;
}

.hero-title .highlight-flame {
  background: linear-gradient(120deg, #ff8c42 0%, #ff5e14 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title .highlight-sec {
  color: #38bdf8;
}

.hero-description {
  font-size: 1.1rem;
  line-height: 1.6;
  color: #cbd5e1;
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-trust-bullets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.trust-bullet-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #e2e8f0;
}

.bullet-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 94, 20, 0.2);
  border: 1px solid rgba(255, 94, 20, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ff8c42;
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* Tarjeta Hero Lateral / Credencial SEC */
.hero-card-column {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sec-credential-card {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.sec-credential-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, #c41230 0%, #ff5e14 50%, #0284c7 100%);
}

.credential-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
}

.sec-verified-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #15803d;
  color: #ffffff;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.credential-technician {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.technician-photo-wrap {
  position: relative;
  width: 84px;
  height: 84px;
  flex-shrink: 0;
}

.technician-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 16% center;
  border-radius: 50%;
  border: 3px solid #ff5e14;
}

.technician-badge-sec {
  position: absolute;
  bottom: -4px;
  right: -4px;
  background: #c41230;
  color: #fff;
  font-size: 0.65rem;
  font-weight: 900;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #fff;
}

.technician-info h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
}

.technician-rut {
  font-size: 0.9rem;
  color: #94a3b8;
  font-weight: 600;
  margin-top: 2px;
}

.technician-cargo {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: 5px;
}

.credential-qr-block {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
}

.qr-code-img {
  width: 64px;
  height: 64px;
  background: #ffffff;
  padding: 3px;
  border-radius: 6px;
  flex-shrink: 0;
}

.qr-text {
  font-size: 0.82rem;
  color: #cbd5e1;
  line-height: 1.4;
}

.qr-text strong {
  color: #ffffff;
  display: block;
}

.hero-quick-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 94, 20, 0.15);
  border: 1px solid rgba(255, 94, 20, 0.35);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  color: #ffedd5;
  font-size: 0.9rem;
  font-weight: 600;
}

/* ==========================================================================
   SISTEMA DE SLIDERS RESPONSIVOS (MARCAS, DIAGNÓSTICO, SERVICIOS)
   "Todo en slider, porfa. Nada en grid. Optimizado para móvil y tablet"
   ========================================================================== */
.custom-slider-container {
  position: relative;
  width: 100%;
  margin-top: 2rem;
}

.slider-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.slider-status-wrap {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.slider-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}

.slider-status-pill.playing {
  color: #15803d;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  box-shadow: 0 2px 6px rgba(22, 163, 74, 0.12);
}

.slider-status-pill.paused {
  color: #c2410c;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  box-shadow: 0 2px 10px rgba(234, 88, 12, 0.2);
}

.slider-status-pill .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #16a34a;
  display: inline-block;
  animation: pulse-dot 1.5s infinite;
}

.slider-status-pill.paused .pulse-dot {
  animation: none;
  background-color: #ea580c;
}

@keyframes pulse-dot {
  0% { transform: scale(0.85); opacity: 0.6; }
  50% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(0.85); opacity: 0.6; }
}

.slider-swipe-hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.slider-arrows {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.slider-arrow-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  z-index: 5;
}

.slider-arrow-btn:hover {
  background: var(--color-flame);
  color: #ffffff;
  border-color: var(--color-flame);
  transform: translateY(-2px);
  box-shadow: var(--shadow-flame);
}

.slider-arrow-btn:active {
  transform: scale(0.95);
}

/* Track horizontal deslizante con scroll-snap */
.slider-scroll-track {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 1.6rem 0.75rem 2.5rem 0.75rem;
  cursor: grab;
}

.slider-scroll-track:active {
  cursor: grabbing;
}

.slider-scroll-track::-webkit-scrollbar {
  display: none;
}

/* Paginación Dots */
.slider-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  margin-top: 1rem;
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: #cbd5e1;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
}

.slider-dot.active {
  width: 28px;
  background: var(--color-flame);
  box-shadow: 0 2px 8px rgba(255, 94, 20, 0.4);
}

/* ==========================================================================
   1. SLIDER DE MARCAS
   ========================================================================== */
.brands-section {
  background: #ffffff;
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-flame);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 680px;
}

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

.text-center .section-subtitle {
  margin: 0 auto;
}

/* Tarjeta de marca en slider */
.brand-slide-card {
  position: relative;
  flex: 0 0 170px;
  scroll-snap-align: center;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 0.85rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.4s ease, opacity 0.4s ease;
  box-shadow: var(--shadow-sm);
  height: 110px;
  user-select: none;
  opacity: 0.68;
}

.brand-slide-card img {
  max-width: 120px;
  max-height: 48px;
  object-fit: contain;
  transition: transform var(--transition-fast), filter var(--transition-fast);
  pointer-events: none;
  filter: grayscale(40%);
}

.brand-slide-card span {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
  transition: color var(--transition-fast);
}

/* Estado Activo y Hover en Marcas */
.brand-slide-card:hover,
.brand-slide-card.is-active,
.brand-slide-card.highlighted {
  border-color: var(--color-flame);
  box-shadow: 0 16px 32px -4px rgba(255, 94, 20, 0.38), 0 0 0 2px var(--color-flame);
  transform: translateY(-8px) scale(1.12);
  opacity: 1;
  background: #ffffff;
  z-index: 5;
}

.brand-slide-card.is-active::after {
  content: 'EN LECTURA';
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 0.56rem;
  font-weight: 900;
  color: #ffffff;
  background: var(--color-flame);
  padding: 2px 6px;
  border-radius: 999px;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 6px rgba(255, 94, 20, 0.4);
}

.brand-slide-card:hover img,
.brand-slide-card.is-active img,
.brand-slide-card.highlighted img {
  transform: scale(1.08);
  filter: grayscale(0%);
}

.brand-slide-card:hover span,
.brand-slide-card.is-active span,
.brand-slide-card.highlighted span {
  color: var(--color-flame);
}

.brands-footnote {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--color-text-main);
  font-weight: 600;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   2. SLIDER DE DIAGNÓSTICO DE AVERÍAS
   ========================================================================== */
.troubleshooter-section {
  padding: 5rem 0;
  background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
  overflow: hidden;
}

.diagnostic-slide-item {
  position: relative;
  flex: 0 0 88%;
  scroll-snap-align: center;
  background: #ffffff;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-md);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.4s ease, opacity 0.4s ease;
  user-select: none;
  opacity: 0.72;
}

@media (min-width: 680px) {
  .diagnostic-slide-item {
    flex: 0 0 calc((100% - 1.5rem) / 2); /* Tablet: 2 tarjetas */
  }
}

@media (min-width: 1024px) {
  .diagnostic-slide-item {
    flex: 0 0 calc((100% - 3rem) / 3); /* Desktop: 3 tarjetas */
  }
}

.diagnostic-slide-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-flame);
  opacity: 0;
  transition: opacity var(--transition-fast), width var(--transition-fast);
}

/* Estado Activo y Hover en Diagnóstico */
.diagnostic-slide-item:hover,
.diagnostic-slide-item.is-active {
  opacity: 1;
  border-color: var(--color-flame);
  box-shadow: 0 24px 48px -10px rgba(255, 94, 20, 0.35), 0 0 0 2px var(--color-flame);
  transform: translateY(-12px) scale(1.035);
  z-index: 5;
}

.diagnostic-slide-item.is-active::after {
  content: '● LEYENDO AHORA';
  position: absolute;
  top: 14px;
  right: 18px;
  font-size: 0.65rem;
  font-weight: 800;
  color: #ffffff;
  background: var(--color-flame);
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(255, 94, 20, 0.4);
}

.diagnostic-slide-item.danger.is-active::after {
  background: #dc2626;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.4);
}

.diagnostic-slide-item:hover::before,
.diagnostic-slide-item.is-active::before {
  opacity: 1;
  width: 6px;
}

.diagnostic-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: #fff7ed;
  color: var(--color-flame);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}

.diagnostic-slide-item.danger .diagnostic-icon-box {
  background: #fef2f2;
  color: #dc2626;
}

.diagnostic-slide-item.is-active .diagnostic-icon-box {
  background: var(--color-flame);
  color: #ffffff;
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(255, 94, 20, 0.35);
}

.diagnostic-slide-item.danger.is-active .diagnostic-icon-box {
  background: #dc2626;
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(220, 38, 38, 0.35);
}

.diagnostic-slide-item h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.65rem;
  line-height: 1.3;
}

.diagnostic-symptoms {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.diagnostic-solution-box {
  background: #f8fafc;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  border-left: 3px solid var(--color-blue-flame);
}

.diagnostic-solution-box strong {
  color: var(--color-primary);
  display: block;
  margin-bottom: 2px;
}

/* ==========================================================================
   3. SLIDER DE SERVICIOS TÉCNICOS
   ========================================================================== */
.services-section {
  padding: 5rem 0;
  background: #ffffff;
  overflow: hidden;
}

.service-slide-item {
  position: relative;
  flex: 0 0 88%;
  scroll-snap-align: center;
  background: #ffffff;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.4s ease, opacity 0.4s ease;
  display: flex;
  flex-direction: column;
  user-select: none;
  opacity: 0.72;
}

@media (min-width: 680px) {
  .service-slide-item {
    flex: 0 0 calc((100% - 1.5rem) / 2); /* Tablet: 2 tarjetas */
  }
}

@media (min-width: 1024px) {
  .service-slide-item {
    flex: 0 0 calc((100% - 3rem) / 3); /* Desktop: 3 tarjetas */
  }
}

/* Estado Activo y Hover en Servicios */
.service-slide-item:hover,
.service-slide-item.is-active {
  opacity: 1;
  border-color: var(--color-flame);
  transform: translateY(-12px) scale(1.035);
  box-shadow: 0 24px 48px -10px rgba(255, 94, 20, 0.35), 0 0 0 2px var(--color-flame);
  z-index: 5;
}

.service-slide-item.is-active::after {
  content: '● DESTACADO';
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 0.65rem;
  font-weight: 800;
  color: #ffffff;
  background: var(--color-flame);
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(255, 94, 20, 0.4);
}

.service-slide-item.is-active .btn-flame {
  background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
  box-shadow: 0 8px 20px rgba(234, 88, 12, 0.45);
  transform: translateY(-2px);
}

.service-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 1rem;
  width: fit-content;
}

.badge-reparacion { background: #fee2e2; color: #991b1b; }
.badge-mantencion { background: #e0f2fe; color: #0369a1; }
.badge-instalacion { background: #fef3c7; color: #92400e; }
.badge-fugas { background: #ffedd5; color: #c2410c; }

.service-slide-item h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.service-slide-item p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex: 1;
}

.service-feature-list {
  list-style: none;
  margin-bottom: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.service-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--color-text-main);
  font-weight: 500;
}

.service-feature-list li i {
  color: #16a34a;
  margin-top: 3px;
  font-size: 0.85rem;
}

/* ==========================================================================
   TIPOS DE CALEFÓN & NORMATIVA SEC
   Keywords: tiro forzado, tiro natural, ionizado, electrico, gas licuado/natural
   ========================================================================== */
.tech-types-section {
  padding: 5rem 0;
  background: var(--color-primary-dark);
  color: #ffffff;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
  margin-top: 3rem;
}

.tech-card {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
}

.tech-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: #ffffff;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tech-card p {
  color: #94a3b8;
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.tech-tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}

.tech-tag {
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  color: #cbd5e1;
}

/* ==========================================================================
   TABLA DE CÓDIGOS DE ERROR
   ========================================================================== */
.errors-section {
  padding: 5rem 0;
  background: #ffffff;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin-top: 2.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.error-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.error-table th {
  background: var(--color-primary);
  color: #ffffff;
  padding: 1rem 1.25rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
}

.error-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.error-table tr:last-child td {
  border-bottom: none;
}

.error-table tr:nth-child(even) td {
  background: var(--color-bg-light);
}

.code-badge {
  display: inline-block;
  background: #fee2e2;
  color: #dc2626;
  font-family: monospace;
  font-weight: 800;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

/* ==========================================================================
   FORMULARIO DIRECTO A WHATSAPP
   "formulario directo al WhatsApp, no se guarda ningún dato dentro del sistema, solo todo al WhatsApp"
   ========================================================================== */
.quote-section {
  padding: 5rem 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.quote-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

.quote-info h2 {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.quote-info p {
  color: #94a3b8;
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.quote-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.quote-bullets li {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 1rem;
  color: #e2e8f0;
}

.quote-bullets i {
  color: var(--color-whatsapp);
  font-size: 1.2rem;
}

.form-box {
  background: #ffffff;
  color: var(--color-text-main);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
}

.form-box h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}

.form-box p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.15rem;
}

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

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.35rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  background: #f8fafc;
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-flame);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(255, 94, 20, 0.15);
}

.form-notice-direct {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: #64748b;
  margin-top: 0.85rem;
  text-align: center;
  justify-content: center;
}

.form-notice-direct i {
  color: var(--color-whatsapp);
}

/* ==========================================================================
   PREGUNTAS FRECUENTES (FAQ ACCORDION)
   "que se disipe las dudas con el FAQ JSON-LD, JSON-LD"
   ========================================================================== */
.faq-section {
  padding: 5rem 0;
  background: #ffffff;
}

.faq-accordion-wrap {
  max-width: 860px;
  margin: 3rem auto 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
  background: #ffffff;
}

.faq-item.active {
  border-color: var(--color-flame);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.faq-item.active .faq-question {
  color: var(--color-flame);
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform 0.3s ease, background 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  background: #fff7ed;
  color: var(--color-flame);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
}

.faq-answer-inner {
  padding: 0 1.5rem 1.25rem 1.5rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   COBERTURA NACIONAL
   ========================================================================== */
.coverage-section {
  padding: 5rem 0;
  background: var(--color-bg-light);
  border-top: 1px solid var(--color-border);
}

.coverage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.coverage-box {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.coverage-box h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.coverage-box h3 i {
  color: var(--color-flame);
}

.coverage-list {
  list-style: none;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.coverage-list li {
  background: #f1f5f9;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: var(--color-primary-dark);
  color: #94a3b8;
  padding: 4.5rem 0 2rem 0;
  border-top: 3px solid var(--color-flame);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: #ffffff;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--color-flame);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  font-size: 0.9rem;
}

.footer-links a {
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-sec-stamp {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-top: 1.25rem;
}

.footer-sec-stamp img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

/* ==========================================================================
   BOTÓN FLOTANTE WHATSAPP Y BARRA MÓVIL
   ========================================================================== */
.floating-whatsapp-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  background-color: var(--color-whatsapp);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  box-shadow: 0 10px 25px rgba(37, 211, 102, 0.5);
  z-index: 999;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
}

.floating-whatsapp-btn:hover {
  transform: scale(1.1) translateY(-3px);
  box-shadow: 0 15px 30px rgba(37, 211, 102, 0.6);
  color: #ffffff;
}

.floating-whatsapp-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: #dc2626;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 800;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #ffffff;
}

/* Barra inferior fija en teléfonos */
.mobile-fixed-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: #ffffff;
  padding: 0.65rem 1rem;
  box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.12);
  z-index: 998;
  border-top: 1px solid var(--color-border);
}

.mobile-bar-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (min-width: 992px) {
  .nav-menu-desktop {
    display: flex;
  }
  .hamburger-btn {
    display: none;
  }
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
  .hero-title {
    font-size: 3.1rem;
  }
  .quote-grid {
    grid-template-columns: 1fr 1.1fr;
  }
}

@media (max-width: 768px) {
  .hero-section {
    padding: 2.5rem 0 3.5rem 0;
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-description {
    font-size: 1rem;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .mobile-fixed-bottom-bar {
    display: block;
  }
  .floating-whatsapp-btn {
    bottom: 74px;
    right: 18px;
    width: 52px;
    height: 52px;
    font-size: 28px;
  }
  body {
    padding-bottom: 60px; /* Espacio para barra inferior */
  }
}