/* ============================================================
   SALVATEC SYSTEMS — Hoja de estilos principal
   Paleta oficial del Manual de Identidad Visual v3.0
   ============================================================ */


/* ── Variables ─────────────────────────────────────────────── */
:root {
  --rojo-fuego:    #DF221A;
  --naranja-base:  #F08112;
  --gris-antracita:#1A252F;
  --gris-circuito: #95A5A6;
  --gris-oscuro:   #0F1920;
  --gris-medio:    #243140;
  --blanco:        #FFFFFF;
  --texto-claro:   #E8EAEB;
  --texto-suave:   #B0BEC5;

  --gradiente-llama: linear-gradient(90deg, var(--rojo-fuego) 0%, var(--naranja-base) 100%);
  --gradiente-llama-v: linear-gradient(180deg, var(--rojo-fuego) 0%, var(--naranja-base) 100%);
  --gradiente-hero: linear-gradient(135deg, var(--gris-oscuro) 0%, var(--gris-antracita) 60%, #1e3040 100%);

  --sombra-llama: 0 0 30px rgba(223, 34, 26, 0.25);
  --sombra-card:  0 4px 24px rgba(0,0,0,0.35);
  --radio:        4px;
  --radio-lg:     8px;

  --nav-h: 72px;
  --transition: 0.25s ease;
}

/* ── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--gris-oscuro);
  color: var(--texto-claro);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ── Tipografía ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: 'Oswald', sans-serif;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.display-xl {
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.display-lg {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  text-transform: uppercase;
}

.display-md {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  text-transform: uppercase;
}

.section-label {
  font-family: 'Oswald', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--naranja-base);
}

.body-lg { font-size: 1.125rem; font-weight: 400; color: var(--texto-suave); }
.body-md { font-size: 1rem;     font-weight: 400; color: var(--texto-suave); }

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

.container-wide {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 100px 0; }
.section-sm { padding: 60px 0; }

.texto-llama {
  background: var(--gradiente-llama);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.linea-llama {
  display: inline-block;
  width: 48px;
  height: 3px;
  background: var(--gradiente-llama);
  border-radius: 2px;
}

.linea-llama-lg {
  display: block;
  width: 64px;
  height: 4px;
  background: var(--gradiente-llama);
  border-radius: 2px;
  margin-bottom: 24px;
}

/* ── Botones ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Oswald', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 32px;
  border-radius: var(--radio);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradiente-llama);
  color: var(--blanco);
  box-shadow: var(--sombra-llama);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(223, 34, 26, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--blanco);
  border: 1.5px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  border-color: var(--naranja-base);
  color: var(--naranja-base);
}

.btn-ghost {
  background: transparent;
  color: var(--naranja-base);
  padding: 0;
  gap: 8px;
  font-size: 0.85rem;
}

.btn-ghost::after {
  content: '→';
  transition: transform var(--transition);
}

.btn-ghost:hover::after { transform: translateX(4px); }

/* ── Patrón circuito (fondo) ────────────────────────────────── */
.bg-circuito {
  position: relative;
}

.bg-circuito::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(149,165,166,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(149,165,166,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.bg-circuito > * { position: relative; z-index: 1; }

/* ── Acento diagonal ────────────────────────────────────────── */
.acento-diagonal {
  position: absolute;
  width: 2px;
  background: var(--gradiente-llama-v);
  opacity: 0.6;
}

/* ── NAV ────────────────────────────────────────────────────── */
#nav-main {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
}

#nav-main.scrolled {
  background: rgba(15, 25, 32, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(223,34,26,0.3);
}

.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-family: 'Oswald', sans-serif;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--texto-suave);
  transition: color var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradiente-llama);
  transition: width var(--transition);
}

.nav-link:hover, .nav-link.activo {
  color: var(--blanco);
}

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

.nav-cta {
  font-family: 'Oswald', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--gradiente-llama);
  color: var(--blanco);
  padding: 9px 22px;
  border-radius: var(--radio);
  transition: all var(--transition);
}

.nav-cta:hover {
  box-shadow: var(--sombra-llama);
  transform: translateY(-1px);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--blanco);
  transition: all var(--transition);
  transform-origin: center;
}

.nav-toggle.abierto span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.abierto span:nth-child(2) { opacity: 0; }
.nav-toggle.abierto span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Menú móvil — oculto por defecto en todos los tamaños */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(15, 25, 32, 0.98);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(149,165,166,0.1);
  padding: 24px;
  flex-direction: column;
  gap: 0;
  z-index: 999;
}

.nav-mobile.abierto { display: flex; }

/* ── HERO ───────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradiente-hero);
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero-fondo-circuito {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(149,165,166,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(149,165,166,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-brillo {
  position: absolute;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(223,34,26,0.12) 0%, transparent 65%);
  pointer-events: none;
}

.hero-brillo-2 {
  position: absolute;
  bottom: -150px;
  left: 20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(240,129,18,0.08) 0%, transparent 65%);
  pointer-events: none;
}

.hero-barra {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradiente-llama-v);
}

.hero-contenido {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Oswald', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--naranja-base);
  margin-bottom: 28px;
}

.hero-tag::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--gradiente-llama);
}

.hero-titulo {
  font-size: clamp(3.2rem, 7vw, 6.5rem);
  font-family: 'Oswald', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.0;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
  color: var(--blanco);
}

.hero-titulo .llama {
  display: block;
  background: var(--gradiente-llama);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--texto-suave);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 48px;
}

.hero-acciones {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}


.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--gris-circuito);
  font-family: 'Oswald', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  animation: bounce 2s infinite;
}

.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--gris-circuito), transparent);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ── PILARES ────────────────────────────────────────────────── */
#pilares {
  background: var(--gris-antracita);
  padding: 0;
}

.pilares-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.pilar-item {
  padding: 60px 40px;
  border-right: 1px solid rgba(149,165,166,0.1);
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
}

.pilar-item:last-child { border-right: none; }

.pilar-item::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradiente-llama);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.pilar-item:hover::before { transform: scaleX(1); }
.pilar-item:hover { background: var(--gris-medio); }

.pilar-num {
  font-family: 'Oswald', sans-serif;
  font-size: 3.5rem;
  font-weight: 700;
  color: rgba(149,165,166,0.15);
  line-height: 1;
  margin-bottom: 16px;
}

.pilar-icono {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--naranja-base);
}

.pilar-titulo {
  font-family: 'Oswald', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--blanco);
  margin-bottom: 12px;
}

.pilar-desc {
  font-size: 0.9rem;
  color: var(--texto-suave);
  line-height: 1.7;
}

/* ── SERVICIOS ──────────────────────────────────────────────── */
#servicios {
  background: var(--gris-oscuro);
}

.servicios-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: end;
  margin-bottom: 72px;
}

.servicios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: rgba(149,165,166,0.08);
}

.servicio-card {
  background: var(--gris-antracita);
  padding: 52px 44px;
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
}

.servicio-card:hover { background: var(--gris-medio); }

.servicio-card-accent {
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 0;
  background: var(--gradiente-llama-v);
  transition: height 0.4s ease;
}

.servicio-card:hover .servicio-card-accent { height: 100%; }

.servicio-icono-wrap {
  width: 56px;
  height: 56px;
  border: 1.5px solid rgba(240,129,18,0.3);
  border-radius: var(--radio);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  transition: border-color var(--transition), background var(--transition);
}

.servicio-card:hover .servicio-icono-wrap {
  border-color: var(--naranja-base);
  background: rgba(240,129,18,0.08);
}

.servicio-icono-wrap svg {
  width: 28px;
  height: 28px;
  color: var(--naranja-base);
}

.servicio-titulo {
  font-family: 'Oswald', sans-serif;
  font-size: 1.35rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--blanco);
  margin-bottom: 14px;
}

.servicio-desc {
  font-size: 0.9rem;
  color: var(--texto-suave);
  line-height: 1.75;
  margin-bottom: 28px;
}

/* ── PROYECTOS HOME ─────────────────────────────────────────── */
#proyectos-home {
  background: var(--gris-antracita);
}

.proyectos-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 56px;
  flex-wrap: wrap;
  gap: 24px;
}

.proyectos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: rgba(149,165,166,0.08);
}

.proyecto-card {
  background: var(--gris-oscuro);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4/3;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  cursor: pointer;
}

.proyecto-img-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--gris-medio) 0%, var(--gris-antracita) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.proyecto-img-placeholder svg {
  width: 64px;
  height: 64px;
  color: rgba(149,165,166,0.2);
}

.proyecto-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,18,24,0.95) 0%, transparent 55%);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.35s ease;
}

.proyecto-card:hover .proyecto-overlay {
  opacity: 1;
  transform: translateY(0);
}

.proyecto-tag-tipo {
  font-family: 'Oswald', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--naranja-base);
  margin-bottom: 8px;
}

.proyecto-nombre {
  font-family: 'Oswald', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--blanco);
  text-transform: uppercase;
}

.proyecto-info-base {
  padding: 24px 28px;
  border-top: 1px solid rgba(149,165,166,0.1);
}

.proyecto-info-base .proyecto-tag-tipo { opacity: 0.8; }
.proyecto-info-base .proyecto-nombre { font-size: 1rem; }

/* ── CONTROLNAT PRODUCTO ────────────────────────────────────── */
#controlnat-producto {
  background: var(--gris-oscuro);
  overflow: hidden;
  position: relative;
}

.cn-fondo-glow {
  position: absolute;
  top: 50%;
  right: -200px;
  transform: translateY(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(240,129,18,0.06) 0%, transparent 65%);
  pointer-events: none;
}

.cn-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.cn-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Oswald', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  background: rgba(240,129,18,0.1);
  color: var(--naranja-base);
  border: 1px solid rgba(240,129,18,0.25);
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 28px;
}

.cn-titulo {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--blanco);
  line-height: 1.1;
  margin-bottom: 24px;
}

.cn-titulo span {
  background: var(--gradiente-llama);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cn-desc {
  font-size: 1rem;
  color: var(--texto-suave);
  line-height: 1.75;
  margin-bottom: 40px;
}

.cn-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 40px;
}

.cn-feature {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.cn-feature-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradiente-llama);
  margin-top: 8px;
  flex-shrink: 0;
}

.cn-feature-text {
  font-size: 0.95rem;
  color: var(--texto-suave);
}

.cn-feature-text strong {
  color: var(--blanco);
  font-weight: 500;
}

.cn-mockup {
  position: relative;
}

.cn-mockup-frame {
  background: var(--gris-antracita);
  border: 1px solid rgba(149,165,166,0.15);
  border-radius: var(--radio-lg);
  overflow: hidden;
  box-shadow: var(--sombra-card), 0 0 60px rgba(0,0,0,0.5);
}


.cn-mockup-badge {
  position: absolute;
  top: -16px;
  right: -16px;
  background: var(--gradiente-llama);
  color: var(--blanco);
  font-family: 'Oswald', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 20px;
  box-shadow: var(--sombra-llama);
}

/* ── POR QUÉ SALVATEC ───────────────────────────────────────── */
#por-que {
  background: var(--gris-antracita);
  position: relative;
}

.por-que-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  background: rgba(149,165,166,0.08);
}

.diferencial-card {
  background: var(--gris-oscuro);
  padding: 44px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
}

.diferencial-card:hover { background: var(--gris-medio); }

.diferencial-num {
  font-family: 'Oswald', sans-serif;
  font-size: 4rem;
  font-weight: 700;
  color: rgba(223,34,26,0.12);
  line-height: 1;
  position: absolute;
  top: 16px;
  right: 20px;
}

.diferencial-icono {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  color: var(--naranja-base);
}

.diferencial-titulo {
  font-family: 'Oswald', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--blanco);
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.diferencial-desc {
  font-size: 0.85rem;
  color: var(--texto-suave);
  line-height: 1.65;
}

/* ── CTA CONTACTO ───────────────────────────────────────────── */
#cta-contacto {
  background: var(--gradiente-llama);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

#cta-contacto::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-titulo {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--blanco);
  line-height: 1.1;
  max-width: 500px;
}

.cta-acciones {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-blanco {
  background: var(--blanco);
  color: var(--rojo-fuego);
  font-family: 'Oswald', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 32px;
  border-radius: var(--radio);
  transition: all var(--transition);
}

.btn-blanco:hover {
  background: var(--gris-oscuro);
  color: var(--blanco);
}

.btn-transparente {
  background: transparent;
  color: var(--blanco);
  border: 1.5px solid rgba(255,255,255,0.5);
  font-family: 'Oswald', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 14px 32px;
  border-radius: var(--radio);
  transition: all var(--transition);
}

.btn-transparente:hover {
  border-color: var(--blanco);
  background: rgba(255,255,255,0.1);
}

/* ── FOOTER ─────────────────────────────────────────────────── */
#footer {
  background: var(--gris-oscuro);
  border-top: 1px solid rgba(149,165,166,0.1);
  padding: 72px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 56px;
}

.footer-logo {
  margin-bottom: 20px;
}

.footer-logo img {
  height: 36px;
  width: auto;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--texto-suave);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social-link {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(149,165,166,0.2);
  border-radius: var(--radio);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gris-circuito);
  transition: all var(--transition);
}

.footer-social-link:hover {
  border-color: var(--naranja-base);
  color: var(--naranja-base);
}

.footer-col-titulo {
  font-family: 'Oswald', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blanco);
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--texto-suave);
  transition: color var(--transition);
}

.footer-link:hover { color: var(--naranja-base); }

.footer-contacto-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-contacto-item svg {
  width: 16px;
  height: 16px;
  color: var(--naranja-base);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-contacto-texto {
  font-size: 0.85rem;
  color: var(--texto-suave);
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid rgba(149,165,166,0.08);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.8rem;
  color: rgba(149,165,166,0.5);
}

.footer-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: rgba(149,165,166,0.4);
}

.footer-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradiente-llama);
}

/* ── PÁGINAS INTERNAS — header de sección ───────────────────── */
.page-hero {
  padding: calc(var(--nav-h) + 80px) 0 80px;
  background: var(--gradiente-hero);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(149,165,166,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(149,165,166,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-hero-barra {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--gradiente-llama-v);
}

/* ── Contacto ────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-family: 'Oswald', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gris-circuito);
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  background: var(--gris-medio);
  border: 1.5px solid rgba(149,165,166,0.15);
  border-radius: var(--radio);
  padding: 13px 16px;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: var(--blanco);
  transition: border-color var(--transition);
  outline: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: rgba(149,165,166,0.4);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--naranja-base);
  box-shadow: 0 0 0 3px rgba(240,129,18,0.1);
}

.form-textarea { min-height: 140px; resize: vertical; }

.form-select option { background: var(--gris-antracita); }

/* ── Sección Marcas & Certificaciones ───────────────────────── */
#marcas {
  background: var(--gris-antracita);
  padding: 60px 0;
  border-top: 1px solid rgba(149,165,166,0.08);
  border-bottom: 1px solid rgba(149,165,166,0.08);
}

.marcas-track {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.marca-item {
  background: #FFFFFF;
  border-radius: 8px;
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 150px;
  flex: 1;
  max-width: 196px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
  transition: transform var(--transition), box-shadow var(--transition);
}

.marca-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.35);
}

.marca-item img {
  max-height: 56px;
  width: 100%;
  max-width: 160px;
  object-fit: contain;
  display: block;
  filter: none;
  opacity: 1;
  transition: none;
}

/* ── Galería de trabajos (fotos reales) ─────────────────────── */
.galeria-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  background: var(--gris-oscuro);
}

.galeria-item {
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.galeria-item:first-child {
  grid-column: 1 / 3;
}

.galeria-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.5s ease;
  min-height: 260px;
}

.galeria-item:first-child img { min-height: 400px; }

.galeria-item:hover img { transform: scale(1.04); }

.galeria-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 20px 20px 14px;
  background: linear-gradient(to top, rgba(10,18,24,0.88) 0%, transparent 100%);
  font-family: 'Oswald', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gris-circuito);
  opacity: 0;
  transition: opacity var(--transition);
}

.galeria-item:hover .galeria-caption { opacity: 1; }

@media (max-width: 768px) {
  .galeria-grid { grid-template-columns: 1fr 1fr; }
  .galeria-item:first-child { grid-column: 1 / -1; }
  .marcas-track { gap: 10px; }
  .marca-item { min-width: 120px; max-width: 160px; padding: 16px 20px; }
  .marca-item img { max-height: 32px; max-width: 100px; }
}

@media (max-width: 480px) {
  .galeria-grid { grid-template-columns: 1fr; }
  .galeria-item:first-child { grid-column: 1; }
}

/* ── Animaciones de entrada ─────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }

/* ── Servicios página interna — grid por sección ────────────── */
.servicio-seccion-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.servicio-seccion-icono {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Nosotros — Misión & Visión */
.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: rgba(149,165,166,0.08);
  margin-bottom: 100px;
}

/* Nosotros — Valores */
.valores-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ControlNat — features 2×2 */
.cn-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: rgba(149,165,166,0.08);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .servicios-header { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .por-que-grid { grid-template-columns: repeat(2, 1fr); }
  .cn-grid { grid-template-columns: 1fr; gap: 48px; }
  .servicio-seccion-grid { gap: 48px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }
  .section { padding: 64px 0; }

  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .nav-mobile {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--gris-oscuro);
    border-top: 1px solid rgba(149,165,166,0.1);
    padding: 24px;
    display: none;
    flex-direction: column;
    gap: 0;
  }

  .nav-mobile.abierto { display: flex; }

  .nav-mobile .nav-link {
    padding: 16px 0;
    border-bottom: 1px solid rgba(149,165,166,0.08);
    font-size: 1rem;
  }

  .nav-mobile .nav-link::after { display: none; }

  .nav-mobile .nav-cta {
    display: inline-flex;
    margin-top: 20px;
    text-align: center;
    justify-content: center;
  }

  .pilares-grid { grid-template-columns: 1fr; }
  .pilar-item { border-right: none; border-bottom: 1px solid rgba(149,165,166,0.1); }
  .pilar-item:last-child { border-bottom: none; }

  .servicios-grid { grid-template-columns: 1fr; }
  .proyectos-grid { grid-template-columns: 1fr; }
  .por-que-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-acciones { justify-content: center; }

  .hero-titulo { font-size: clamp(2.5rem, 10vw, 4rem); }
  .hero-acciones { flex-direction: column; }
  .hero-acciones .btn { width: 100%; justify-content: center; }

  /* Servicios página — colapsar secciones a una columna */
  .servicio-seccion-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* Ocultar círculos decorativos en mobile — !important para anular inline style */
  .servicio-seccion-icono { display: none !important; }

  /* Contacto — colapsar layout y filas del formulario */
  .contacto-layout-grid { grid-template-columns: 1fr !important; gap: 40px !important; }
  .form-row { grid-template-columns: 1fr !important; }

  /* Proyectos — grid inline override para mobile */
  #proyectos-grid {
    grid-template-columns: 1fr !important;
  }

  /* Proyectos — la card ocupa todo el ancho, mostrar overlay siempre */
  .proyecto-card-full { }

  /* Chips de subservicios más compactos */
  .servicio-chip {
    font-size: 0.72rem;
    padding: 4px 8px;
  }

  /* Nosotros — colapsar a 1 columna */
  .mv-grid {
    grid-template-columns: 1fr;
    margin-bottom: 56px;
  }
  .mv-grid > div { padding: 40px 24px; }
  .valores-grid { grid-template-columns: 1fr; gap: 16px; }

  /* ControlNat — colapsar sección principal y features */
  .cn-seccion-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .cn-features-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .servicio-card { padding: 36px 24px; }
  .pilar-item { padding: 40px 24px; }
  .servicio-seccion-grid { gap: 24px; }
  .page-hero { padding: calc(var(--nav-h) + 48px) 0 48px; }
}

/* ── Skip link (accesibilidad) ──────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--naranja-base);
  color: var(--blanco);
  padding: 12px 24px;
  z-index: 9999;
  font-family: 'Oswald', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* ── Links de contacto ──────────────────────────────────────── */
.contacto-link {
  color: var(--texto-claro);
  transition: color var(--transition);
}
.contacto-link:hover { color: var(--naranja-base); }

/* ── Mensajes del formulario de contacto ────────────────────── */
.form-mensaje {
  padding: 14px 18px;
  border-radius: var(--radio);
  margin-bottom: 20px;
  font-size: 0.9rem;
  display: none;
}
.form-mensaje.exito { background: rgba(76,175,80,0.1);  border: 1px solid rgba(76,175,80,0.3);  color: #81c784; }
.form-mensaje.error { background: rgba(223,34,26,0.1);  border: 1px solid rgba(223,34,26,0.3);  color: #ef9a9a; }

/* ── Prefers-reduced-motion ─────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .fade-up { opacity: 1; transform: none; }
  .fade-up.visible { opacity: 1; transform: none; }
}