/* =========================================================
   ACGas — Hoja de estilos principal
   =========================================================
   ÍNDICE:
   1. Design tokens (colores, tipografía, spacing)
   2. Reset y base
   3. Utilidades
   4. Header y navegación
   5. Hero
   6. Secciones genéricas
   7. Servicios
   8. Quiénes somos
   9. Respaldo Naturgy
   10. Por qué elegirnos
   11. Experiencia
   12. Trabajos + Carrusel
   13. Requisitos
   14. Paso a paso
   15. Formas de pago
   16. Contacto + Formulario + Mapa
   17. Footer
   18. WhatsApp flotante
   19. Responsive
   ========================================================= */


/* ========== 1. DESIGN TOKENS ========== */
:root {
  /* Colores extraídos del logo ACGas */
  --color-primary: #E85D25;        /* naranja principal */
  --color-primary-dark: #C24818;   /* hover naranja */
  --color-red: #D62828;            /* rojo del logo */
  --color-yellow: #F4B942;         /* amarillo del logo */

  /* Neutros */
  --color-bg: #FFFFFF;
  --color-bg-alt: #FAF6F1;         /* beige muy clarito */
  --color-text: #001d3d;
  --color-text-muted: #6B7280;
  --color-border: #E5E7EB;
  --color-border-strong: #001d3d;

  /* Tipografía */
  --font-display: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Layout */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 200ms ease;

  /* Header height (usado para scroll offset) */
  --header-height: 100px;
}


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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

ul, ol { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ========== 3. UTILIDADES ========== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.75rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border-radius: var(--radius-sm);
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 0 var(--color-primary-dark);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(232, 93, 37, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border-strong);
}
.btn-ghost:hover {
  background: var(--color-text);
  color: #fff;
}

.btn-sm { padding: 0.6rem 1.2rem; font-size: 0.875rem; }
.btn-block { width: 100%; }


/* ========== 4. HEADER Y NAVEGACIÓN ========== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 2rem;
}

.brand {
  display: block;
  height: 80px;
  flex-shrink: 0;
}
.brand-logo {
  height: 100%;
  width: auto;
  object-fit: contain;
}

.main-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.9rem;
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.nav-link:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.nav-cta {
  background: var(--color-text);
  color: #fff !important;
  margin-left: 0.5rem;
}
.nav-cta:hover {
  background: var(--color-primary);
  color: #fff !important;
}

.chev {
  display: inline-block;
  font-size: 0.75rem;
  transition: transform var(--transition);
}
.has-dropdown.open .chev { transform: rotate(180deg); }

/* Dropdowns */
.has-dropdown {
  position: relative;
}
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 240px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.5rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all var(--transition);
}
.has-dropdown:hover .dropdown,
.has-dropdown.open .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown li a {
  display: block;
  padding: 0.65rem 0.9rem;
  font-size: 0.925rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.dropdown li a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* Hamburguesa (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 101;
}
.nav-toggle span {
  display: block;
  width: 28px;
  height: 2.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }


/* ========== 5. HERO ========== */
.hero {
  position: relative;
  padding-top: calc(var(--header-height) + var(--space-2xl));
  padding-bottom: var(--space-2xl);
  overflow: hidden;
  background: var(--color-bg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 900px 500px at 90% 20%, rgba(244, 185, 66, 0.15), transparent 60%),
    radial-gradient(ellipse 700px 400px at 10% 80%, rgba(232, 93, 37, 0.08), transparent 60%);
  pointer-events: none;
}

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

.hero-content { max-width: 900px; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-primary);
  border-radius: 999px;
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  margin-bottom: var(--space-md);
  color: #001d3d;
}
.hero-title .accent {
  color: var(--color-primary);
  font-style: italic;
  font-weight: 600;
}

.hero-lead {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 620px;
  margin-bottom: var(--space-lg);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: var(--space-xl);
}

/* Franja técnica: signature del sitio */
.tech-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  border-top: 1px solid var(--color-border-strong);
  border-bottom: 1px solid var(--color-border-strong);
  margin-top: var(--space-xl);
}
.tech-strip li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1rem;
  border-right: 1px solid var(--color-border);
}
.tech-strip li:last-child { border-right: none; }
.tech-code {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.tech-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.35;
}


/* ========== 6. SECCIONES GENÉRICAS ========== */
.section {
  padding-block: var(--space-2xl);
}
.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  max-width: 780px;
  margin-bottom: var(--space-xl);
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}
.section-tag-light { color: var(--color-yellow); }

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  margin-bottom: var(--space-sm);
}
.section-title-light { color: #fff; }

.section-lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 640px;
}


/* ========== 7. SERVICIOS ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
}
.service-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-primary);
  box-shadow: 0 12px 30px rgba(232, 93, 37, 0.08);
}

.service-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}
.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}
.service-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}


/* ========== 8. QUIÉNES SOMOS ========== */
.two-col {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}
.two-col-text p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 1.15rem;
}
.two-col-text strong { color: var(--color-text); font-weight: 600; }

.two-col-side { position: sticky; top: calc(var(--header-height) + 2rem); }

.stat-card {
  padding: 2rem;
  background: var(--color-text);
  color: #fff;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.stat-value {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-yellow);
  letter-spacing: -0.05em;
}
.stat-label {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.5;
}


/* ========== 9. RESPALDO NATURGY ========== */
.naturgy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}
.naturgy-text p {
  color: var(--color-text-muted);
  margin-bottom: 1.15rem;
  font-size: 1.02rem;
}
.naturgy-text strong { color: var(--color-text); font-weight: 600; }

.naturgy-logo {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}
.naturgy-logo-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}
.naturgy-logo img { max-width: 180px; height: auto; }

.capability-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.capability-list li {
  display: flex;
  gap: 1.25rem;
  padding: 1.25rem;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition);
}
.capability-list li:hover {
  border-color: var(--color-primary);
  transform: translateX(4px);
}
.cap-code {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}
.capability-list h4 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}
.capability-list p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}
.capability-list p strong { color: var(--color-text); font-weight: 600; }


/* ========== 10. POR QUÉ ELEGIRNOS ========== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.why-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.why-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.05);
}
.why-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
  color: var(--color-text);
}
.why-card p {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}
.why-card-cta {
  background: var(--color-text);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}
.why-card-cta h3 { color: #fff; }
.why-card-cta p { color: rgba(255,255,255,0.8); }


/* ========== 11. EXPERIENCIA (BANDA OSCURA) ========== */
.experience-band {
  background: var(--color-text);
  color: #fff;
  padding-block: var(--space-2xl);
}
.experience-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}
.experience-text .section-title { color: #fff; }

.experience-counter {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.counter-value {
  font-family: var(--font-display);
  font-size: clamp(6rem, 14vw, 10rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--color-yellow);
}
.counter-suffix {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  color: #fff;
  font-weight: 600;
}
.counter-label {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.4;
  width: 100%;
  margin-top: 0.5rem;
}


/* ========== 12. TRABAJOS + GALERÍA ========== */
.zones-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-xl);
  padding-block: var(--space-lg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-xl);
}
.zone-block {
  padding-inline: 0;
}
.zone-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
  font-weight: 700;
}
.zone-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.5rem 1.5rem;
}
.zone-list li {
  padding: 0.5rem 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  padding-left: 1.25rem;
}
.zone-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}
.zone-note {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
}
.zone-note a {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom: 1px solid currentColor;
}

/* Galería — header */
.gallery-head {
  margin-bottom: var(--space-lg);
  max-width: 720px;
}
.gallery-head h3 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}
.gallery-head p {
  color: var(--color-text-muted);
}

/* Galería — marquee infinito */
.gallery-marquee {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 12px;
  mask-image: linear-gradient(to right, transparent 0%, #000 6%, #000 94%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 6%, #000 94%, transparent 100%);
}

.marquee-row { overflow: hidden; }

.marquee-track {
  display: flex;
  gap: 12px;
  width: max-content;
}

.marquee-row--right .marquee-track {
  animation: marquee-right 65s linear infinite;
}
.marquee-row--left .marquee-track {
  animation: marquee-left 60s linear infinite;
}
.marquee-row:hover .marquee-track {
  animation-play-state: paused;
}

@keyframes marquee-right {
  from { transform: translateX(-50%); }
  to   { transform: translateX(0); }
}
@keyframes marquee-left {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.marquee-item {
  flex-shrink: 0;
  width: 360px;
  height: 280px;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
}
.marquee-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 350ms ease, opacity 350ms ease;
  pointer-events: none;
}
.marquee-item:hover img {
  transform: scale(1.05);
  opacity: 0.85;
}

@media (prefers-reduced-motion: reduce) {
  .marquee-row--right .marquee-track,
  .marquee-row--left .marquee-track {
    animation: none;
    transform: translateX(0);
  }
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 250ms ease, visibility 250ms ease;
}
.lightbox.active {
  opacity: 1;
  visibility: visible;
}
.lightbox-img {
  max-width: min(90vw, 1200px);
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6);
  transform: scale(0.94);
  transition: transform 250ms ease;
}
.lightbox.active .lightbox-img {
  transform: scale(1);
}
.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
  z-index: 201;
}
.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: scale(1.1);
}


/* ========== 13. REQUISITOS ========== */
.req-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.req-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.req-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 1rem;
}
.req-code {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-primary);
  flex-shrink: 0;
}

.req-forms {
  background: var(--color-text);
  color: #fff;
  border-radius: var(--radius);
  padding: 2rem;
}
.req-forms h3 {
  color: #fff;
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}
.req-forms p {
  color: rgba(255,255,255,0.7);
  font-size: 0.925rem;
  margin-bottom: 1.5rem;
}

.form-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.form-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  transition: background var(--transition), border-color var(--transition);
}
.form-link:hover {
  background: rgba(232, 93, 37, 0.15);
  border-color: var(--color-primary);
}
.form-link-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  flex-shrink: 0;
}
.form-link strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
}
.form-link small {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
}


/* ========== 14. PASO A PASO ========== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  counter-reset: step;
}
.step {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
  transition: border-color var(--transition), transform var(--transition);
}
.step:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}
.step-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-bg-alt);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
  letter-spacing: 0.05em;
}
.step h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}
.step p {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}


/* ========== 15. FORMAS DE PAGO ========== */
.pay-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}
.pay-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  transition: transform var(--transition), border-color var(--transition);
}
.pay-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
}
.pay-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding-inline: 0.75rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
}
.pay-card h3 {
  font-size: 1.05rem;
}
.pay-card h3 small {
  display: block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}
.pay-card-highlight {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
}
.pay-card-highlight h3 { color: #fff; }
.pay-card-highlight h3 small { color: rgba(255,255,255,0.65); }
.pay-card-highlight .pay-code {
  background: var(--color-yellow);
  color: var(--color-text);
}


/* ========== 16. CONTACTO ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.form-field {
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}
.form-field label span { color: var(--color-primary); }

.form-field input,
.form-field select,
.form-field textarea {
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  padding: 0.8rem 0.9rem;
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(232, 93, 37, 0.12);
}
.form-field textarea { resize: vertical; min-height: 120px; }

.form-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 1rem;
}

/* Info de contacto */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.contact-block h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  font-weight: 700;
}
.contact-block p {
  font-size: 0.975rem;
  line-height: 1.6;
  color: var(--color-text);
}
.contact-block a {
  color: var(--color-text);
  transition: color var(--transition);
}
.contact-block a:hover { color: var(--color-primary); }

.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.9rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.social-links a:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateX(4px);
}
.social-links svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Mapa */
.map-wrapper {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
}


/* ========== 17. FOOTER ========== */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.75);
  padding-top: var(--space-2xl);
  margin-top: 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-xl);
}
.footer-brand p {
  margin-top: 1rem;
  font-size: 0.925rem;
  line-height: 1.6;
  max-width: 380px;
}
.footer-logo {
  max-width: 180px;
}
.footer-col h4 {
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col a {
  font-size: 0.925rem;
  color: rgba(255,255,255,0.65);
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--color-primary); }

.footer-naturgy {
  max-width: 140px;
  /* Se mantienen los colores originales de la marca Naturgy — sobre fondo oscuro
     los envolvemos en un contenedor blanco liviano para respetar identidad de marca */
  background: #fff;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  height: auto;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-block: 1.25rem;
}
.footer-bottom p {
  font-size: 0.825rem;
  color: rgba(255,255,255,0.5);
  text-align: center;
}


/* ========== 18. WHATSAPP FLOTANTE ========== */
.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 58px;
  height: 58px;
  background: #25D366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
  z-index: 99;
  transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 28px rgba(37, 211, 102, 0.5);
}
.whatsapp-float svg { width: 30px; height: 30px; }


/* ========== 19. RESPONSIVE ========== */
@media (max-width: 960px) {
  .two-col,
  .naturgy-grid,
  .req-grid,
  .contact-grid,
  .zones-grid,
  .experience-inner {
    grid-template-columns: 1fr;
  }
  .two-col-side { position: static; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --header-height: 68px; }

  .nav-toggle { display: flex; }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    padding: 1.5rem;
    transform: translateX(100%);
    transition: transform 300ms ease;
    overflow-y: auto;
    border-top: 1px solid var(--color-border);
  }
  .main-nav.active { transform: translateX(0); }

  .main-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }
  .nav-link {
    padding: 0.9rem 1rem;
    font-size: 1.05rem;
    justify-content: space-between;
    width: 100%;
  }
  .nav-cta { margin-left: 0; margin-top: 0.75rem; }

  /* Dropdowns como acordeón en mobile */
  .dropdown {
    position: static;
    background: var(--color-bg-alt);
    box-shadow: none;
    border: none;
    padding: 0.25rem 0.5rem;
    display: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin-top: 0.25rem;
    border-radius: var(--radius-sm);
  }
  .has-dropdown.open .dropdown { display: block; }
  .has-dropdown:hover .dropdown { opacity: 1; visibility: visible; }

  .hero { padding-top: calc(var(--header-height) + var(--space-xl)); padding-bottom: var(--space-xl); }
  .section { padding-block: var(--space-xl); }

  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  .form-row { grid-template-columns: 1fr; gap: 0; margin-bottom: 0; }

  .footer-inner { grid-template-columns: 1fr; gap: 2rem; text-align: left; }

  .whatsapp-float { width: 52px; height: 52px; }
  .whatsapp-float svg { width: 26px; height: 26px; }

  .tech-strip { grid-template-columns: 1fr 1fr; }
  .tech-strip li { border-right: none; border-bottom: 1px solid var(--color-border); }
  .tech-strip li:nth-child(odd) { border-right: 1px solid var(--color-border); }
  .tech-strip li:nth-last-child(-n+2) { border-bottom: none; }

  .marquee-item { width: 220px; height: 160px; }
  .gallery-marquee { gap: 8px; }
  .marquee-track { gap: 8px; }
}

@media (max-width: 480px) {
  .contact-form { padding: 1.5rem 1.25rem; }
  .stat-value { font-size: 4rem; }
  .experience-counter { justify-content: flex-start; }
  .tech-strip { grid-template-columns: 1fr; }
  .tech-strip li { border-right: none !important; border-bottom: 1px solid var(--color-border); }
  .tech-strip li:last-child { border-bottom: none; }
}