/* ====================================
   SISTEMA DE DISEÑO AIRNOX — main.css
   Contiene los estilos globales, variables y utilidades.
   ==================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700;900&family=Inter:wght@300;400;500;600&display=swap');

:root {
  /* — Paleta AIRES (Modernizada): Tonos azules y frescos — */
  --aires-dark:    #0a0f16;
  --aires-primary: #1e3a8a;
  --aires-mid:     #3b82f6;
  --aires-accent:  #7dd3fc;
  --aires-glow:    rgba(125, 211, 252, 0.25);

  /* — Paleta ACERO (Metálica & Soldadura): Tonos oscuros y cian de arco eléctrico — */
  --acero-dark:    #0d0e12;
  --acero-primary: #15171d;
  --acero-mid:     #242730;
  --acero-silver:  #8b94a5;
  --acero-accent:  #00e5ff; /* Azul eléctrico */
  --acero-spark:   #ff5500; /* Naranja de chispa de soldadura */
  --acero-glow:    rgba(0, 229, 255, 0.35);

  /* — Tipografía: Outfit para títulos e Inter para cuerpo de texto — */
  --font-head: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* — Radios de Curvatura & Sombras — */
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-xl: 40px;

  /* — Sombras Profundas para Efecto Premium — */
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.25);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.45);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.65);

  /* — Tiempos de Transición — */
  --t-fast:   0.2s ease;
  --t-smooth: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow:   0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Reset: Normalización de estilos base del navegador ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-body); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img, video { display: block; max-width: 100%; }
.nav-logo img { max-height: 52px; width: auto; object-fit: contain; }
a { text-decoration: none; color: inherit; }
button { font-family: var(--font-body); cursor: pointer; border: none; background: none; }

/* ---- Utilidades: Clases de ayuda para accesibilidad o diseño rápido ---- */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

/* ---- Botones: Estilos base y variantes por sector (Aires / Acero) ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-xl);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  transition: all var(--t-smooth);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.12);
  opacity: 0;
  transition: opacity var(--t-fast);
}
.btn:hover::after { opacity: 1; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-aires {
  background: linear-gradient(135deg, var(--aires-primary), var(--aires-accent));
  color: #fff;
  box-shadow: 0 4px 20px var(--aires-glow);
}
.btn-aires:hover { box-shadow: 0 8px 32px var(--aires-glow); }

.btn-acero {
  background: linear-gradient(135deg, var(--acero-mid), var(--acero-accent));
  color: #fff;
  box-shadow: 0 4px 20px var(--acero-glow);
}
.btn-acero:hover { box-shadow: 0 8px 32px var(--acero-glow); }

.btn-outline-aires {
  border: 2px solid var(--aires-primary);
  color: var(--aires-primary);
  background: transparent;
}
.btn-outline-aires:hover {
  background: var(--aires-primary);
  border-color: var(--aires-primary);
  color: #fff;
  box-shadow: 0 8px 25px rgba(30, 58, 138, 0.2);
}

.btn-outline-acero {
  border: 2px solid var(--acero-accent);
  color: var(--acero-accent);
  background: transparent;
}
.btn-outline-acero:hover { background: var(--acero-accent); color: #fff; }

/* ---- Scroll-reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Section Heading ---- */
.section-heading {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.1;
}

/* ---- Page Hero ---- */
.page-hero {
  position: relative;
  min-height: 65vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.page-hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: blur(2px) brightness(0.4);
  transform: scale(1.05);
}
.page-hero__content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 3rem 2rem;
}

/* ---- Pie de Página: Estilos básicos para el copyright y enlaces inferiores ---- */
.site-footer {
  text-align: center;
  padding: 2.5rem 1rem;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
}

/* ---- Animaciones Reutilizables: Efectos de entrada, flotación y destellos ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}
@keyframes spin-slow {
  to { transform: rotate(360deg); }
}
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}
@keyframes sparkle {
  0%, 100% { opacity: 0; transform: scale(0); }
  50%       { opacity: 1; transform: scale(1); }
}

/* ---- Scroll top button ---- */
#scrollTop {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: all var(--t-smooth);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  cursor: pointer;
}
#scrollTop.show { opacity: 1; pointer-events: all; }

/* ---- Botón flotante de WhatsApp: Visible en todas las páginas ---- */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  background-color: #25d366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
  z-index: 9999;
  transition: all 0.3s ease;
  animation: pulse-whatsapp 2s infinite;
}

.whatsapp-float svg {
  width: 32px;
  height: 32px;
}

.whatsapp-float:hover {
  transform: scale(1.1) translateY(-5px);
  box-shadow: 0 12px 30px rgba(37, 211, 102, 0.5);
  background-color: #20b355;
}

/* ---- Final CTA Forms (Global) ---- */
.quote-form {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 2.5rem;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  width: 100%;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
}

.form-group label {
  font-size: 0.75rem;
  font-weight: 700;
  color: #3b82f6; /* Default accent, can be overridden */
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #3b82f6;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.2);
}

.form-group select option {
  background: #0f172a;
  color: #fff;
}

.btn-submit {
  width: 100%;
  display: flex !important;
  align-items: center;
  justify-content: center;
  padding: 1rem !important;
  font-size: 1rem !important;
  font-weight: 700;
  border-radius: 12px;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
}

/* Override for Acero page accent if needed */
.page-acero .form-group label { color: #2d7dd2; }
.page-acero .form-group input:focus,
.page-acero .form-group select:focus,
.page-acero .form-group textarea:focus { border-color: #2d7dd2; }

@media (max-width: 680px) {
  .form-row { grid-template-columns: 1fr; }
  .quote-form { padding: 1.5rem; }
}

@keyframes pulse-whatsapp {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
  70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}