/* ==========================================================================
   SINTECRA | ENERGÍA & OBRAS — Industrial B2B Design System & Microanimations
   Transitions calibrated between 250ms and 400ms for engineering precision
   ========================================================================== */

:root {
  --color-carbon: #0A0A0A;
  --color-anthracite: #141414;
  --color-footer: #050505;
  --color-stone: #F4F4F5;
  --color-amber: #F59E0B;
  --color-amber-hover: #D97706;
  --color-green: #16A34A;
  --ease-industrial: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Blueprint & Engineering Grids */
.bg-engineering-grid {
  background-color: #0A0A0A;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(to right, rgba(245, 158, 11, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(245, 158, 11, 0.03) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px, 160px 160px, 160px 160px;
}

.bg-light-grid {
  background-color: #F4F4F5;
  background-image:
    linear-gradient(to right, rgba(10, 10, 10, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10, 10, 10, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Official Logo Typographic Fallback Replica (sintecra_v2_white.jpg) */
.sintecra-logo-fallback {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  user-select: none;
}
.sintecra-logo-fallback__title {
  font-family: 'Montserrat', 'Barlow', sans-serif;
  font-weight: 900;
  color: #FFFFFF;
  letter-spacing: 0.06em;
  line-height: 1;
  text-transform: uppercase;
  text-align: center;
}
.sintecra-logo-fallback__divider {
  height: 1px;
  width: 100%;
  background-color: #FFFFFF;
  margin: 4px 0 5px 0;
  opacity: 0.9;
}
.sintecra-logo-fallback__subtitle {
  font-family: 'Montserrat', 'Inter', sans-serif;
  font-weight: 600;
  color: #FFFFFF;
  letter-spacing: 0.28em;
  line-height: 1;
  text-transform: uppercase;
  text-align: center;
  padding-left: 0.28em;
}

/* ==========================================================================
   3. ENLACES INTERACTIVOS DE SERVICIOS (Hover & Mobile Touch Optimized)
   - Aumento de tamaño suave (scale)
   - Transición de color a ámbar corporativo (#F59E0B)
   - Subrayado animado
   - Glow sutil
   - Cursor pointer
   - En móvil: área táctil ampliada y touch-action manipulation
   ========================================================================== */
.service-interactive-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: rgba(245, 158, 11, 0.15);
  transition:
    transform 300ms var(--ease-industrial),
    color 280ms var(--ease-industrial),
    text-shadow 320ms var(--ease-industrial),
    filter 320ms var(--ease-industrial);
  transform-origin: left center;
}

.service-interactive-link--center {
  transform-origin: center center;
}

/* Subrayado animado de izquierda a derecha */
.service-interactive-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, #F59E0B 0%, #FBBF24 70%, transparent 100%);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 320ms var(--ease-industrial), box-shadow 320ms var(--ease-industrial);
}

.service-interactive-link:hover,
.service-interactive-link:focus-visible {
  color: #F59E0B !important;
  transform: scale(1.045);
  text-shadow: 0 0 18px rgba(245, 158, 11, 0.45);
}

.service-interactive-link:hover::after,
.service-interactive-link:focus-visible::after,
.group:hover .service-interactive-link::after {
  transform: scaleX(1);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.55);
}

.group:hover .service-interactive-link {
  color: #F59E0B !important;
  transform: scale(1.035);
  text-shadow: 0 0 18px rgba(245, 158, 11, 0.42);
}

/* Versión sobre fondo claro (#F4F4F5 / #FFFFFF) */
.service-interactive-link--light:hover,
.service-interactive-link--light:focus-visible,
.group:hover .service-interactive-link--light {
  color: #D97706 !important;
  text-shadow: 0 0 14px rgba(245, 158, 11, 0.28);
}

/* Optimización táctil móvil: área táctil ampliada */
@media (max-width: 768px) {
  .service-interactive-link {
    padding-top: 0.35rem;
    padding-bottom: 0.35rem;
    min-height: 44px;
  }
  .service-interactive-link:active {
    color: #F59E0B !important;
    transform: scale(1.03);
    text-shadow: 0 0 16px rgba(245, 158, 11, 0.5);
  }
  .service-interactive-link:active::after {
    transform: scaleX(1);
  }
}

/* Píldoras interactivas de servicios en el Hero */
.hero-service-pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.7rem 1.15rem;
  min-height: 48px;
  background: rgba(20, 20, 20, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 2px;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    transform 300ms var(--ease-industrial),
    border-color 300ms var(--ease-industrial),
    background-color 300ms var(--ease-industrial),
    box-shadow 320ms var(--ease-industrial),
    color 280ms var(--ease-industrial);
}

.hero-service-pill:hover,
.hero-service-pill:focus-visible {
  transform: translateY(-3px) scale(1.03);
  border-color: #F59E0B;
  background: rgba(24, 24, 27, 0.96);
  color: #F59E0B;
  box-shadow: 0 10px 28px -6px rgba(245, 158, 11, 0.28), 0 0 0 1px rgba(245, 158, 11, 0.25);
}

/* ==========================================================================
   4 & 6. TARJETAS INTERACTIVAS, ELEVACIÓN, BORDES ANIMADOS Y PROFUNDIDAD
   ========================================================================== */
.card-industrial-interactive {
  position: relative;
  overflow: hidden;
  transition:
    transform 340ms var(--ease-industrial),
    box-shadow 340ms var(--ease-industrial),
    border-color 300ms var(--ease-industrial);
  will-change: transform;
}

.card-industrial-interactive::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, #F59E0B, #FBBF24, #D97706);
  transform: scaleX(0.28);
  transform-origin: left center;
  transition: transform 360ms var(--ease-industrial), box-shadow 360ms var(--ease-industrial);
  z-index: 20;
}

.card-industrial-interactive:hover,
.card-industrial-interactive:focus-within {
  transform: translateY(-6px);
  border-color: rgba(245, 158, 11, 0.65);
  box-shadow:
    0 20px 38px -12px rgba(0, 0, 0, 0.65),
    0 0 24px -4px rgba(245, 158, 11, 0.2);
}

.card-industrial-interactive--light:hover,
.card-industrial-interactive--light:focus-within {
  box-shadow:
    0 20px 36px -12px rgba(10, 10, 10, 0.14),
    0 0 0 1px rgba(245, 158, 11, 0.45);
}

.card-industrial-interactive:hover::before,
.card-industrial-interactive:focus-within::before {
  transform: scaleX(1);
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.75);
}

/* Zoom suave de imagen en los 4 grandes bloques de navegación rápida */
.quick-nav-card__img {
  transition: transform 400ms var(--ease-industrial), filter 400ms var(--ease-industrial);
  will-change: transform;
}

.card-industrial-interactive:hover .quick-nav-card__img {
  transform: scale(1.06);
  filter: contrast(1.06) brightness(1.05);
}

/* ==========================================================================
   7. ANIMACIONES MODERNAS: FADE IN ON SCROLL & PARALLAX SUAVE
   ========================================================================== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 360ms var(--ease-industrial),
    transform 360ms var(--ease-industrial);
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Respeta accesibilidad si el usuario prefiere reducir movimiento */
@media (prefers-reduced-motion: reduce) {
  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .quick-nav-card__img,
  .card-industrial-interactive,
  .service-interactive-link {
    transition: none !important;
  }
}

/* Transición suave entre secciones (Divisores técnicos) */
.section-transition-dark-to-light {
  height: 4px;
  background: linear-gradient(90deg, #0A0A0A 0%, #F59E0B 50%, #0A0A0A 100%);
}

/* Pulso sutil para botón flotante de WhatsApp */
@keyframes subtlePulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.55), 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(22, 163, 74, 0), 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  }
}
.whatsapp-pulse {
  animation: subtlePulse 2.8s infinite cubic-bezier(0.4, 0, 0.6, 1);
}

/* Offset anchor scroll for sticky header */
section[id], footer[id] {
  scroll-margin-top: 5rem;
}