/* ==========================================================================
   SOLARMX - Venta e Instalación de Calentadores Solares en Tláhuac y Sur CDMX
   Hoja de Estilos CSS3 Puro (Vanilla CSS)
   Theme: CLEAN MINIMALISM
   Características:
   - Paleta Slate & Solar Orange de Alto Contraste
   - Tipografía geométrica nítida con espaciado matemático
   - Bordes milimétricos (hairline) y fondos limpios (Slate-50 / White / Slate-900)
   - Botones tipo Pill (rounded-full) y micro-interacciones sutiles
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. VARIABLES DE DISEÑO & DESIGN TOKENS (CLEAN MINIMALISM)
   -------------------------------------------------------------------------- */
:root {
  /* Slate & Neutros */
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;

  /* Naranjas Solares de Acento */
  --orange-50: #fff7ed;
  --orange-100: #ffedd5;
  --orange-200: #fed7aa;
  --orange-300: #fdba74;
  --orange-400: #fb923c;
  --orange-500: #f97316;
  --orange-600: #ea580c;
  --orange-700: #c2410c;
  --orange-800: #9a3412;

  /* Verdes & Ahorro */
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;

  /* WhatsApp */
  --whatsapp-green: #25d366;
  --whatsapp-dark: #128c7e;

  /* Asignaciones Semánticas */
  --color-bg-body: var(--slate-50);
  --color-bg-surface: #ffffff;
  --color-bg-alt: var(--slate-100);

  --color-text-main: var(--slate-900);
  --color-text-body: var(--slate-700);
  --color-text-muted: var(--slate-500);
  --color-text-light: var(--slate-400);

  --color-primary: var(--slate-900);
  --color-primary-hover: var(--slate-800);

  --color-accent: var(--orange-500);
  --color-accent-hover: var(--orange-600);
  --color-accent-subtle: var(--orange-50);
  --color-accent-border: var(--orange-200);

  --color-border: var(--slate-200);
  --color-border-hover: var(--slate-300);

  /* Tipografía */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Sombras Minimalistas Suaves */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.06), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);

  /* Radios */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Transiciones */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  /* Ancho de Contenedor */
  --container-max-width: 1160px;
}

/* --------------------------------------------------------------------------
   2. RESET & ESTILOS BASE
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

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

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

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

/* Contenedor Responsivo Global */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* --------------------------------------------------------------------------
   3. BARRA SUPERIOR DE AVISOS & HEADER (CLEAN MINIMALISM)
   -------------------------------------------------------------------------- */
.top-notification-bar {
  background-color: var(--orange-50);
  border-bottom: 1px solid var(--orange-200);
  color: var(--orange-900);
  padding: 0.45rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: center;
  position: relative;
  z-index: 50;
}

.top-notification-bar .promo-text {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.top-notification-bar strong {
  color: var(--orange-800);
  font-weight: 700;
}

.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 40;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--slate-300);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.brand-logo-link img {
  height: 40px;
  width: auto;
}

.nav-menu {
  display: none;
}

@media (min-width: 992px) {
  .nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
  }

  .nav-link {
    color: var(--slate-600);
    font-weight: 600;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
    padding: 0.5rem 0;
    position: relative;
  }

  .nav-link:hover,
  .nav-link:focus {
    color: var(--slate-900);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--orange-500);
    transition: width var(--transition-fast);
  }

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* --------------------------------------------------------------------------
   BOTONES CLEAN MINIMALISM (PILL & SOLID SLATE)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
  line-height: 1.2;
}

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.75rem 1.75rem;
  font-size: 0.95rem;
}

/* Botón Principal: Dark Slate Minimalista */
.btn-primary {
  background-color: var(--slate-900);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--slate-800);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Botón Secundario: Blanco con Borde Slate */
.btn-secondary {
  background-color: #ffffff;
  color: var(--slate-800);
  border: 1px solid var(--slate-300);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background-color: var(--slate-50);
  border-color: var(--slate-400);
  color: var(--slate-900);
}

/* Botón WhatsApp */
.btn-whatsapp {
  background-color: var(--whatsapp-green);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
  background-color: #20ba59;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
}

/* Botón Outline / Acento */
.btn-outline {
  background-color: transparent;
  color: var(--slate-800);
  border: 1px solid var(--slate-300);
}

.btn-outline:hover {
  border-color: var(--orange-500);
  color: var(--orange-600);
  background-color: var(--orange-50);
}

/* Hamburguesa Móvil */
.mobile-nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 36px;
  height: 36px;
  background: transparent;
  padding: 6px;
  cursor: pointer;
  z-index: 60;
  border-radius: var(--radius-sm);
}

@media (min-width: 992px) {
  .mobile-nav-toggle {
    display: none;
  }
}

.mobile-nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--slate-800);
  border-radius: 1px;
  transition: all var(--transition-base);
}

.mobile-nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.mobile-nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Menú Móvil */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 84%;
  max-width: 320px;
  height: 100vh;
  background-color: #ffffff;
  box-shadow: var(--shadow-xl);
  z-index: 55;
  padding: 5rem 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: right 0.25s ease-out;
  overflow-y: auto;
}

.mobile-nav-drawer.open {
  right: 0;
}

.mobile-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  z-index: 50;
  display: none;
}

.mobile-backdrop.open {
  display: block;
}

.mobile-nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--slate-800);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--slate-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* --------------------------------------------------------------------------
   4. HERO SECTION (CLEAN MINIMALISM)
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  background-color: #ffffff;
  padding: 3rem 0 3.5rem;
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3.5rem;
    padding: 1rem 0;
  }
}

/* Eyebrow Badge */
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: var(--orange-100);
  color: var(--orange-700);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-xs);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.12;
  color: var(--slate-900);
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
}

@media (min-width: 1200px) {
  .hero-title {
    font-size: 3.5rem;
  }
}

.hero-title .highlight {
  color: var(--orange-500);
  font-style: italic;
  font-weight: 300;
}

.hero-subtitle {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--slate-600);
  margin-bottom: 1.75rem;
  max-width: 540px;
}

/* Banner de Promoción 5km: Estilo Border-Left 4px */
.hero-cta-banner {
  background-color: var(--orange-50);
  border-left: 4px solid var(--orange-500);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  max-width: 480px;
}

.cta-banner-icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
}

.cta-banner-content h3 {
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--orange-800);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.15rem;
}

.cta-banner-content p {
  font-size: 0.875rem;
  color: var(--orange-700);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.25rem;
}

@media (min-width: 576px) {
  .hero-actions {
    flex-direction: row;
    align-items: center;
  }
}

/* Métricas Hero de Alto Contraste */
.hero-badges-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--slate-200);
}

@media (min-width: 768px) {
  .hero-badges-row {
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
  }
}

.trust-badge-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.trust-badge-item .badge-icon {
  display: none;
  /* Ocultamos íconos redundantes en hero metric limpio */
}

.badge-text strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--slate-900);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.badge-text span {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--slate-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Imagen Hero */
.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-md);
  background-color: var(--slate-100);
}

.hero-image-wrapper img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  aspect-ratio: 16/11;
}

.hero-floating-card {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--slate-200);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.floating-stat-value {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--green-600);
  line-height: 1;
}

.floating-stat-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--slate-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   5. SECCIÓN 2: CATÁLOGO DE CALENTADORES SOLARES (CLEAN MINIMALISM)
   -------------------------------------------------------------------------- */
.section-padding {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 2.5rem;
}

.section-eyebrow {
  display: inline-block;
  color: var(--slate-400);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--slate-900);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.25rem;
  }
}

.section-desc {
  font-size: 0.95rem;
  color: var(--slate-600);
  line-height: 1.5;
}

/* Filtros de Catálogo */
.catalog-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
}

.filter-btn {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  background-color: #ffffff;
  color: var(--slate-600);
  border: 1px solid var(--slate-200);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--slate-400);
  color: var(--slate-900);
}

.filter-btn.active {
  background-color: var(--slate-900);
  color: #ffffff;
  border-color: var(--slate-900);
}

/* Banner de Sistemas: Gravedad vs Alta Presión */
.systems-info-banner {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .systems-info-banner {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

.system-type-card {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}

.system-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background-color: var(--slate-100);
  color: var(--slate-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.system-type-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 0.25rem;
}

.system-type-card p {
  font-size: 0.85rem;
  color: var(--slate-600);
  line-height: 1.45;
}

/* Cuadrícula de Productos */
.catalog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .catalog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Tarjeta de Producto */
.product-card {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  position: relative;
}

.product-card:hover {
  border-color: var(--slate-400);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.product-card.featured-card {
  background-color: var(--orange-50);
  border: 1px solid var(--orange-200);
  box-shadow: var(--shadow-sm);
}

.featured-ribbon {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: var(--orange-500);
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  z-index: 10;
}

.product-image-box {
  width: 100%;
  height: 190px;
  background-color: var(--slate-100);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--slate-100);
}

.product-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.product-card:hover .product-image-box img {
  transform: scale(1.03);
}

.product-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.product-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.01em;
}

/* Badge de Capacidad Monospace */
.product-tubes-badge {
  background-color: var(--slate-100);
  color: var(--slate-800);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--slate-200);
}

.product-card.featured-card .product-tubes-badge {
  background-color: var(--orange-500);
  color: #ffffff;
  border-color: var(--orange-500);
}

.product-specs-list {
  list-style: none;
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.product-spec-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  color: var(--slate-600);
}

.spec-bullet {
  color: var(--orange-500);
  font-weight: 700;
  font-size: 0.9rem;
}

.product-savings-pill {
  background-color: var(--green-50);
  color: var(--green-700);
  border: 1px solid var(--green-100);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.65rem;
  font-size: 0.775rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  margin-bottom: 1rem;
}

.product-card-footer {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

/* --------------------------------------------------------------------------
   CALCULADORA INTERACTIVA DE TAMAÑO & AHORRO (CLEAN MINIMALISM SLATE-900)
   -------------------------------------------------------------------------- */
.calculator-box {
  background-color: var(--slate-900);
  color: #ffffff;
  border-radius: var(--radius-2xl);
  padding: 2.25rem 1.5rem;
  margin-top: 3.5rem;
  box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
  .calculator-box {
    padding: 3rem 2.5rem;
  }
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 992px) {
  .calc-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }
}

.calc-intro h3 {
  font-size: 1.625rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.calc-intro p {
  color: var(--slate-400);
  font-size: 0.9375rem;
  margin-bottom: 1.5rem;
}

.calc-control-group {
  margin-bottom: 1.5rem;
}

.calc-control-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
  color: var(--slate-200);
}

.calc-slider-wrapper {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.calc-slider {
  flex-grow: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--slate-700);
  outline: none;
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--orange-500);
  cursor: pointer;
  border: 2px solid #ffffff;
  box-shadow: var(--shadow-sm);
}

.calc-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--orange-500);
  cursor: pointer;
  border: 2px solid #ffffff;
  box-shadow: var(--shadow-sm);
}

.calc-number-badge {
  background-color: var(--orange-500);
  color: #ffffff;
  font-size: 1.125rem;
  font-weight: 800;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.calc-result-card {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  text-align: center;
}

.calc-result-tag {
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--orange-400);
  margin-bottom: 0.5rem;
}

.calc-recommended-model {
  font-size: 1.875rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.2rem;
  letter-spacing: -0.02em;
}

.calc-recommended-litres {
  font-size: 0.95rem;
  color: var(--slate-300);
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.calc-savings-highlight {
  background-color: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
}

.calc-savings-amount {
  font-size: 1.35rem;
  font-weight: 900;
  color: #4ade80;
}

.calc-savings-text {
  font-size: 0.75rem;
  color: var(--slate-300);
}

/* --------------------------------------------------------------------------
   6. SECCIÓN 3: COBERTURA LOCAL & VENTAJAS (CLEAN MINIMALISM)
   -------------------------------------------------------------------------- */
.coverage-section {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.advantages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .advantages-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.advantage-card {
  background-color: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-fast);
}

.advantage-card:hover {
  background-color: #ffffff;
  border-color: var(--slate-300);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.adv-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--orange-100);
  color: var(--orange-600);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.advantage-card h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 0.4rem;
}

.advantage-card p {
  font-size: 0.85rem;
  color: var(--slate-600);
  line-height: 1.45;
}

/* Ubicación Matriz y Mapa */
.location-showcase-box {
  background-color: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 992px) {
  .location-showcase-box {
    grid-template-columns: 1fr 1.1fr;
  }
}

.location-info-side {
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.location-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--orange-600);
  font-weight: 800;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.location-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.location-address-box {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.address-pin {
  font-size: 1.25rem;
  color: var(--orange-500);
  flex-shrink: 0;
  margin-top: 1px;
}

.address-text strong {
  display: block;
  font-size: 0.875rem;
  color: var(--slate-900);
  margin-bottom: 0.15rem;
}

.address-text p {
  font-size: 0.8125rem;
  color: var(--slate-500);
}

.zones-pills-wrap {
  margin-bottom: 1.5rem;
}

.zones-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--slate-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.45rem;
}

.zones-pills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.zone-chip {
  background-color: #ffffff;
  color: var(--slate-700);
  border: 1px solid var(--slate-200);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.location-map-side {
  position: relative;
  min-height: 320px;
  background-color: var(--slate-200);
}

.location-map-side iframe {
  width: 100%;
  height: 100%;
  min-height: 320px;
  border: none;
  display: block;
}

/* --------------------------------------------------------------------------
   7. SECCIÓN 4: TESTIMONIOS (CLEAN MINIMALISM THEME)
   -------------------------------------------------------------------------- */
.testimonials-section {
  background-color: var(--slate-50);
}

.reviews-header-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.stars-row {
  color: #facc15;
  font-size: 0.95rem;
  letter-spacing: 1px;
}

.reviews-score-text {
  font-weight: 800;
  font-size: 0.8125rem;
  color: var(--slate-800);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.testimonial-card:hover {
  transform: translateY(-2px);
  border-color: var(--slate-300);
  box-shadow: var(--shadow-sm);
}

/* Tarjeta Destacada Slate-900 (Patrón Clave Clean Minimalism) */
.testimonial-card:first-child {
  background-color: var(--slate-900);
  border-color: var(--slate-800);
  color: #ffffff;
}

.testimonial-card:first-child .review-title {
  color: #ffffff;
}

.testimonial-card:first-child .review-quote {
  color: var(--slate-300);
}

.testimonial-card:first-child .review-author-info {
  border-top-color: var(--slate-800);
}

.testimonial-card:first-child .author-meta strong {
  color: #ffffff;
}

.testimonial-card:first-child .author-meta span {
  color: var(--slate-400);
}

.review-stars {
  color: #facc15;
  font-size: 1rem;
  margin-bottom: 0.65rem;
}

.review-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.review-quote {
  font-size: 0.875rem;
  color: var(--slate-600);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
  font-style: italic;
}

.review-author-info {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--slate-200);
}

.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--orange-500);
  color: #ffffff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.author-meta strong {
  display: block;
  font-size: 0.8125rem;
  color: var(--slate-900);
}

.author-meta span {
  font-size: 0.75rem;
  color: var(--slate-400);
}

.google-reviews-cta-box {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.75rem;
  text-align: center;
  max-width: 620px;
  margin: 0 auto;
}

.google-reviews-cta-box p {
  font-size: 0.875rem;
  color: var(--slate-600);
  margin-bottom: 0.85rem;
}

/* --------------------------------------------------------------------------
   8. SECCIÓN 5: PREGUNTAS FRECUENTES (CLEAN MINIMAL ACCORDION)
   -------------------------------------------------------------------------- */
.faq-section {
  background-color: #ffffff;
}

.faq-container {
  max-width: 760px;
  margin: 0 auto;
}

.faq-accordion-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #ffffff;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--slate-400);
  background-color: var(--slate-50);
}

.faq-question-btn {
  width: 100%;
  padding: 1.1rem 1.25rem;
  text-align: left;
  background: none;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--slate-900);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background-color var(--transition-fast);
}

.faq-question-btn:hover {
  background-color: var(--slate-50);
}

.faq-toggle-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--slate-400);
  transition: transform var(--transition-base), color var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--orange-500);
}

.faq-answer-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  background-color: #ffffff;
}

.faq-answer-inner {
  padding: 1rem 1.25rem 1.25rem;
  font-size: 0.875rem;
  color: var(--slate-600);
  line-height: 1.6;
  border-top: 1px solid var(--slate-200);
}

/* --------------------------------------------------------------------------
   9. SECCIÓN 6: FORMULARIO DE COTIZACIÓN RÁPIDA & CONTACTO
   -------------------------------------------------------------------------- */
.contact-section {
  background-color: var(--slate-50);
  border-top: 1px solid var(--slate-200);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 992px) {
  .contact-grid {
    grid-template-columns: 1fr 1.15fr;
    gap: 3.5rem;
  }
}

.contact-info-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-channels-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.channel-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.channel-item:hover {
  border-color: var(--slate-400);
  transform: translateX(2px);
}

.channel-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--slate-100);
  color: var(--slate-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.channel-icon.whatsapp {
  background-color: var(--green-100);
  color: var(--green-700);
}

.channel-details strong {
  display: block;
  font-size: 0.875rem;
  color: var(--slate-900);
}

.channel-details p {
  font-size: 0.8125rem;
  color: var(--slate-500);
}

/* Formulario */
.quote-form-card {
  background-color: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--slate-800);
  margin-bottom: 0.35rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  background-color: var(--slate-50);
  color: var(--slate-900);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  background-color: #ffffff;
  border-color: var(--slate-900);
  box-shadow: 0 0 0 2px rgba(15, 23, 42, 0.08);
}

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

@media (min-width: 576px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

/* --------------------------------------------------------------------------
   10. FOOTER (CLEAN MINIMALISM)
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: #ffffff;
  color: var(--slate-600);
  padding: 3.5rem 0 2rem;
  border-top: 1px solid var(--slate-200);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

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

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.footer-brand h4 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.55;
  margin-bottom: 1rem;
  max-width: 340px;
}

.footer-column h5 {
  font-size: 0.8125rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-link {
  color: var(--slate-500);
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--slate-900);
}

.footer-geo-tags {
  background-color: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.85rem;
  font-size: 0.75rem;
  color: var(--slate-500);
  line-height: 1.5;
}

.footer-bottom {
  padding-top: 1.75rem;
  border-top: 1px solid var(--slate-200);
  text-align: center;
  font-size: 0.775rem;
  color: var(--slate-400);
}

/* --------------------------------------------------------------------------
   11. BOTÓN FLOTANTE WHATSAPP (CLEAN MINIMALISM)
   -------------------------------------------------------------------------- */
.floating-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.floating-wa-btn {
  width: 56px;
  height: 56px;
  background-color: var(--whatsapp-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.85rem;
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
}

.floating-wa-btn:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 18px rgba(37, 211, 102, 0.5);
}

.floating-wa-label {
  display: none;
  background-color: #ffffff;
  color: var(--slate-900);
  font-weight: 700;
  font-size: 0.8125rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--slate-200);
  white-space: nowrap;
}

@media (min-width: 768px) {
  .floating-wa-label {
    display: block;
  }
}

/* Toast de Notificación */
.toast-msg {
  position: fixed;
  bottom: 90px;
  right: 24px;
  background-color: var(--slate-900);
  color: #ffffff;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  transform: translateY(16px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

.toast-msg.show {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}