/* ===================================================================
   SEMWELD - Master Design System & Industrial Stylesheet
   Paleta Institucional: 
     - Azul Petróleo: #02454f
     - Ámbar Fundición: #df7e09
     - Carbón Profundo: #050b0e / #0a0a0a
   Estética: Taller Industrial Pesado — Oscuro, Sólido, Sin Brillos
   =================================================================== */

:root {
  /* Tokens de Color Primarios SEMWELD */
  --color-petrol: #02454f;
  --color-petrol-dark: #012b32;
  --color-petrol-light: #036877;

  --color-flame: #df7e09;
  --color-flame-dark: #b86200;

  --color-metal: #a8b2b8;
  --color-metal-light: #d0d8dc;

  /* Superficies Oscuras de Taller */
  --bg-dark: #0a0a0a;
  --bg-surface: #111111;
  --bg-surface-elevated: #161616;
  --bg-card: #131313;

  --border-subtle: rgba(255,255,255,0.06);
  --border-petrol: rgba(2, 69, 79, 0.5);

  /* Tipografías */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', 'Inter', sans-serif;
  --font-mono: 'Space Grotesk', monospace;

  /* Transiciones */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: #e0e5e8;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* Fondo: degradado sólido de carbón a negro — estética taller pesado */
  background: linear-gradient(180deg, #111111 0%, #0a0a0a 40%, #060606 100%);
}

/* Scrollbar Industrial */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: #080808; }
::-webkit-scrollbar-thumb {
  background: var(--color-petrol);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-flame); }

/* Tipografía */
h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.font-mono { font-family: var(--font-mono); }

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

/* ===================================================================
   ANIMACIONES — Scroll Reveal & Sparks
   =================================================================== */

/* Scroll Reveal */
.reveal-init {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.reveal-init.reveal-left { transform: translateX(-35px); }
.reveal-init.reveal-right { transform: translateX(35px); }
.reveal-init.reveal-scale { transform: scale(0.95); }
.reveal-init.revealed { opacity: 1; transform: translate(0,0) scale(1); }

.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }
.reveal-delay-4 { transition-delay: 0.48s; }

/* Canvas de Chispas de Soldadura */
.hero-sparks-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 2;
}

/* ===================================================================
   CONTENEDOR Y ESTRUCTURA RESPONSIVA
   =================================================================== */
.container-custom {
  width: 100%;
  max-width: 1380px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

@media (min-width: 1600px) {
  .container-custom {
    max-width: 1540px;
    padding-left: 2.5rem;
    padding-right: 2.5rem;
  }
}

/* ===================================================================
   ELEMENTOS DE DISEÑO INDUSTRIAL
   =================================================================== */

/* Corner Bracket — Acento angular de taller */
.corner-frame { position: relative; }
.corner-frame::before {
  content: '';
  position: absolute;
  top: -5px; left: -5px;
  width: 20px; height: 20px;
  border-top: 2px solid var(--color-flame);
  border-left: 2px solid var(--color-flame);
  z-index: 10;
  pointer-events: none;
  transition: all var(--transition-fast);
}
.corner-frame::after {
  content: '';
  position: absolute;
  bottom: -5px; right: -5px;
  width: 20px; height: 20px;
  border-bottom: 2px solid var(--color-flame);
  border-right: 2px solid var(--color-flame);
  z-index: 10;
  pointer-events: none;
  transition: all var(--transition-fast);
}
.corner-frame:hover::before { top: -7px; left: -7px; width: 26px; height: 26px; }
.corner-frame:hover::after { bottom: -7px; right: -7px; width: 26px; height: 26px; }

/* Resaltado de Texto — Bloque de fuego por cada línea/palabra */
.flame-highlight {
  display: inline;
  background: var(--color-flame);
  color: #ffffff;
  padding: 0.06em 0.28em;
  border-radius: 2px;
  font-weight: 900;
  /* Cada línea al romper recibe su propio rectángulo de fondo */
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  line-height: 1.35;
}

/* Cita de Taller */
.quote-industrial {
  background: #0f0f0f;
  border-left: 4px solid var(--color-flame);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-right: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 1.25rem 1.5rem;
  border-radius: 0 4px 4px 0;
  font-style: italic;
  color: var(--color-metal-light);
  line-height: 1.65;
}

/* Tarjeta Métrica Flotante */
.floating-stat-card {
  background: var(--color-flame);
  color: #ffffff;
  padding: 1.25rem 1.75rem;
  border-radius: 3px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  transition: transform var(--transition-fast);
}
.floating-stat-card:hover { transform: translateY(-3px); }
.floating-stat-card .stat-num {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1;
}
.floating-stat-card .stat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.3;
}

/* ===================================================================
   BOTONES
   =================================================================== */

.btn-flame {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  background: var(--color-flame);
  color: #ffffff !important;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.85rem 1.75rem;
  border-radius: 3px;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
}
.btn-flame:hover {
  background: var(--color-flame-dark);
  transform: translateY(-1px);
}
.btn-flame:active { transform: translateY(0); }

.btn-petrol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  background: var(--color-petrol);
  color: #ffffff !important;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.85rem 1.75rem;
  border-radius: 3px;
  border: 1px solid var(--color-petrol-light);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
}
.btn-petrol:hover {
  background: var(--color-petrol-light);
  transform: translateY(-1px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  background: transparent;
  color: #e0e5e8 !important;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.85rem 1.75rem;
  border-radius: 3px;
  border: 1px solid rgba(255,255,255,0.2);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}
.btn-outline:hover {
  border-color: var(--color-flame);
  color: #ffffff !important;
  transform: translateY(-1px);
}

/* Botón Flotante WhatsApp */
.floating-whatsapp {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  z-index: 50;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25D366;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
}
.floating-whatsapp:hover { transform: scale(1.08); }

/* ===================================================================
   HEADER Y NAVEGACIÓN
   =================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 10, 0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition-fast);
}

/* Línea de acento color petróleo-fuego en la parte superior */
.site-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-petrol) 0%, var(--color-flame) 50%, var(--color-petrol) 100%);
}

.site-header.scrolled {
  background: rgba(6, 6, 6, 0.99);
  border-bottom-color: rgba(223,126,9,0.25);
  padding-top: 0.5rem !important;
  padding-bottom: 0.5rem !important;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.85rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #8e9ea7;
  border-radius: 3px;
  position: relative;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  width: 0; height: 2px;
  background: var(--color-flame);
  transition: all var(--transition-fast);
  transform: translateX(-50%);
}
.nav-link:hover { color: #ffffff; }
.nav-link:hover::after,
.nav-link.active::after { width: 70%; }
.nav-link.active { color: #ffffff; }

/* ===================================================================
   TARJETAS INDUSTRIALES
   =================================================================== */

.card-industrial {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-smooth), transform var(--transition-smooth);
}
.card-industrial.card-dark {
  background: #0d0d0d;
  border-color: rgba(255, 255, 255, 0.08);
}
.card-industrial.card-petrol {
  background: #0d171e;
  border-color: rgba(2, 69, 79, 0.6);
}
.card-industrial:hover {
  transform: translateY(-4px);
  border-color: rgba(223,126,9,0.4);
}

/* ===================================================================
   HERO SECTIONS
   =================================================================== */

.hero-industrial {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding: 6rem 0 5rem;
  overflow: hidden;
  background-color: #0a0a0a;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center 35%;
  background-repeat: no-repeat;
  filter: brightness(0.28) contrast(1.2);
  transform: scale(1.02);
  transition: transform 12s ease-out;
}
.hero-industrial:hover .hero-backdrop { transform: scale(1.05); }

.hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0;
  bottom: -8px;
  /* Superposición pura negra, sin tono verde/petóleo */
  background: linear-gradient(160deg,
    rgba(0,0,0,0.78) 0%,
    rgba(0,0,0,0.52) 50%,
    rgba(0,0,0,1) 100%
  );
  pointer-events: none;
}

.hero-content { position: relative; z-index: 10; }

/* Banner de Páginas Secundarias */
.page-header-industrial {
  position: relative;
  padding: 5rem 0 4rem;
  background-size: cover;
  background-position: center;
  background-color: #0a0a0a;
  overflow: hidden;
  /* Sin border-bottom: el overlay se funde directamente con la siguiente sección */
}
.page-header-overlay {
  position: absolute;
  /* Extiende 8px más abajo que la sección para eliminar el gap */
  top: 0; left: 0; right: 0;
  bottom: -8px;
  background: linear-gradient(180deg,
    rgba(0,0,0,0.85) 0%,
    rgba(0,0,0,0.55) 50%,
    rgba(10,10,10,1) 85%,
    rgba(10,10,10,1) 100%
  );
  pointer-events: none;
}

/* Cintillo de Métricas */
.metrics-strip {
  background: #0d0d0d;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 2.5rem 0;
  position: relative;
}

/* ===================================================================
   FORMULARIOS INDUSTRIALES
   =================================================================== */

.form-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.813rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #a8b2b8;
  margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: #0d0d0d;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 3px;
  padding: 0.85rem 1rem;
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.938rem;
  outline: none;
  transition: border-color var(--transition-fast);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-flame);
  background: #111111;
}
.form-input::placeholder,
.form-textarea::placeholder { color: #4a5568; }
.form-select option { background-color: #111111; color: #ffffff; }
.form-textarea { min-height: 125px; resize: vertical; }

/* ===================================================================
   DRAWER MÓVIL
   =================================================================== */

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-overlay.active { opacity: 1; pointer-events: auto; }

.mobile-drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 300px;
  max-width: 85vw;
  background: #0d0d0d;
  border-left: 2px solid var(--color-flame);
  z-index: 100;
  padding: 1.75rem;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
}
.mobile-drawer.active { transform: translateX(0); }

/* ===================================================================
   FOOTER
   =================================================================== */

.site-footer {
  background: #0a0a0a;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 4rem 0 2.5rem;
}

/* ===================================================================
   FAQ ACORDEÓN
   =================================================================== */

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.faq-item.active .faq-answer {
  /* max-height se controla por JS */
}
.faq-item.active [data-lucide="chevron-down"],
.faq-item.active .lucide-chevron-down,
.faq-item.active .faq-trigger svg {
  transform: rotate(180deg);
}
.faq-trigger svg,
[data-lucide="chevron-down"] {
  transition: transform 0.3s ease;
}

/* ===================================================================
   BADGE LABELS SUPRIMIDOS (se reemplaza con divisor de sección)
   =================================================================== */
.badge-industrial,
.badge-flame,
.badge-petrol {
  display: none !important;
}

/* Línea decorativa de sección (reemplaza los badges) */
.section-rule {
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-flame);
  margin-bottom: 1.25rem;
}