/* =========================================================
   ARTRESSA — Crea · Innova · Soluciona
   Landing de turbinas y rotores industriales
   Paleta industrial: azul acero oscuro + ámbar ARTRESSA
========================================================= */

:root {
  --azul-oscuro: #10202f;
  --azul-medio: #1b2a38;
  --azul-claro: #2e4a63;
  --naranja: #f4a300;
  --naranja-oscuro: #d68e00;
  --gris-claro: #f4f6f8;
  --gris-texto: #4a5a68;
  --blanco: #ffffff;
  --radius: 10px;
  --transicion: 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', Arial, Helvetica, sans-serif;
  color: var(--azul-medio);
  line-height: 1.6;
  background: var(--blanco);
}

img, svg { max-width: 100%; display: block; }

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

ul { list-style: none; }

h1, h2, h3, h4 { line-height: 1.25; color: var(--azul-oscuro); }

.section-header { text-align: center; max-width: 700px; margin: 0 auto 40px; padding: 0 20px; }
.section-header h2 { font-size: 2rem; margin-bottom: 10px; }
.section-header p { color: var(--gris-texto); }

/* ===================== NAVBAR ===================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--azul-oscuro);
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  gap: 20px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--blanco);
  white-space: nowrap;
}
.nav-logo img { height: 40px; width: auto; }
.nav-logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav-logo-text strong {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--naranja);
}
.nav-logo-text em {
  font-style: normal;
  font-size: 0.6rem;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
}

.nav-links {
  display: flex;
  gap: 26px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: var(--blanco);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transicion);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--naranja); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 26px;
  height: 3px;
  background: var(--blanco);
  border-radius: 2px;
}

/* ===================== HERO / CARRUSEL ===================== */
.hero {
  position: relative;
  height: 78vh;
  min-height: 480px;
  overflow: hidden;
}

.carousel { position: relative; width: 100%; height: 100%; }
.carousel-track { position: relative; width: 100%; height: 100%; }

.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.carousel-slide.active { opacity: 1; visibility: visible; }

/* Fotos reales del catálogo como fondo del hero */
.slide-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  background: var(--azul-oscuro);
}

.slide-caption {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  max-width: 90%;
  text-align: center;
  color: rgba(255,255,255,0.95);
  font-size: 0.9rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-shadow: 0 2px 8px rgba(0,0,0,0.7);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.15);
  border: none;
  color: var(--blanco);
  font-size: 1.3rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 5;
  transition: background var(--transicion);
}
.carousel-btn:hover { background: rgba(255,255,255,0.3); }
.carousel-btn.prev { left: 20px; }
.carousel-btn.next { right: 20px; }

.carousel-dots {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}
.carousel-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: background var(--transicion);
}
.carousel-dots .dot.active { background: var(--naranja); }

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 20px;
  /* Degradado sobre la foto para que el texto siempre sea legible */
  background: linear-gradient(180deg, rgba(10,20,30,0.55) 0%, rgba(10,20,30,0.72) 55%, rgba(10,20,30,0.55) 100%);
  pointer-events: none;
}
.hero-overlay a { pointer-events: auto; }
.hero-overlay h1 {
  color: var(--blanco);
  font-size: clamp(1.8rem, 4vw, 3rem);
  max-width: 800px;
  margin-bottom: 16px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.4);
}
.hero-overlay p {
  color: rgba(255,255,255,0.9);
  font-size: clamp(1rem, 2vw, 1.2rem);
  max-width: 600px;
  margin-bottom: 26px;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

.btn-primary, .btn-secondary {
  padding: 13px 26px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transicion), box-shadow var(--transicion);
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--naranja); color: var(--azul-oscuro); }
.btn-primary:hover { background: var(--naranja-oscuro); transform: translateY(-2px); }
.btn-secondary { background: transparent; color: var(--blanco); border-color: var(--blanco); }
.btn-secondary:hover { background: rgba(255,255,255,0.15); transform: translateY(-2px); }

/* ===================== STATS ===================== */
.stats {
  background: var(--azul-medio);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
  padding: 34px 20px;
}
.stat { text-align: center; color: var(--blanco); }
.stat-num { display: block; font-size: 2rem; font-weight: 700; color: var(--naranja); }
.stat span:last-child { font-size: 0.85rem; opacity: 0.85; }

/* ===================== PRODUCTOS ===================== */
.productos { padding: 70px 20px; background: var(--gris-claro); }

.product-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 26px;
}

.product-card {
  background: var(--blanco);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.07);
  transition: transform var(--transicion), box-shadow var(--transicion);
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 10px 24px rgba(0,0,0,0.12); }

.product-img {
  height: 240px;
  overflow: hidden;
  background: var(--azul-medio);
}
.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}
.product-card:hover .product-img img { transform: scale(1.05); }

.product-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.product-body h3 { margin-bottom: 10px; font-size: 1.25rem; }
.product-body p { color: var(--gris-texto); font-size: 0.92rem; margin-bottom: 14px; }

/* Empuja el botón al pie de la tarjeta para alinearlo entre columnas */
.product-specs { margin-bottom: 18px; }
.product-card .btn-quote { margin-top: auto; align-self: flex-start; }
.product-specs li {
  font-size: 0.85rem;
  color: var(--azul-medio);
  padding: 4px 0;
  border-bottom: 1px dashed #ddd;
}

.btn-quote {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #25D366;
  color: var(--blanco);
  padding: 10px 18px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 600;
  transition: background var(--transicion);
}
.btn-quote:hover { background: #1eb856; }

/* ===================== GALERÍA ===================== */
.galeria { padding: 70px 20px; }

.galeria-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

.galeria-item {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--azul-medio);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  position: relative;
}
.galeria-item img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}
.galeria-item:hover img { transform: scale(1.06); }

.galeria-item figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 22px 14px 10px;
  background: linear-gradient(180deg, rgba(10,20,30,0) 0%, rgba(10,20,30,0.85) 60%);
  color: var(--blanco);
  font-size: 0.8rem;
  font-weight: 600;
}

/* ===================== NOSOTROS ===================== */
.nosotros {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 50px;
  align-items: center;
}
.nosotros-text h2 { font-size: 2rem; margin-bottom: 18px; }
.nosotros-text p { color: var(--gris-texto); margin-bottom: 16px; }

.nosotros-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 24px;
}
.value {
  background: var(--gris-claro);
  border-left: 4px solid var(--naranja);
  border-radius: 6px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.value strong { color: var(--azul-oscuro); }
.value span { font-size: 0.85rem; color: var(--gris-texto); }

.nosotros-visual { border-radius: var(--radius); overflow: hidden; box-shadow: 0 8px 24px rgba(0,0,0,0.12); }

.nosotros-visual-logo {
  background: var(--gris-claro);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 34px;
}
.nosotros-visual-logo img { width: 100%; max-width: 260px; height: auto; }

/* ===================== CLIENTES ===================== */
.clientes { background: var(--gris-claro); padding: 50px 20px; text-align: center; }
.clientes-title { color: var(--gris-texto); margin-bottom: 24px; font-weight: 600; }
.clientes-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; max-width: 900px; margin: 0 auto; }
.cliente-logo {
  background: var(--blanco);
  padding: 14px 24px;
  border-radius: 8px;
  color: var(--azul-medio);
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* ===================== FAQ ===================== */
.faq { max-width: 800px; margin: 0 auto; padding: 80px 20px; }

.faq-item {
  border-bottom: 1px solid #e2e6ea;
}
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--azul-oscuro);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-question span { color: var(--naranja); font-size: 1.4rem; transition: transform var(--transicion); }
.faq-item.open .faq-question span { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transicion);
}
.faq-answer p { padding: 0 0 18px; color: var(--gris-texto); font-size: 0.92rem; }

/* ===================== CONTACTO ===================== */
.contacto { background: var(--azul-oscuro); padding: 80px 20px; }
.contacto .section-header h2, .contacto .section-header p { color: var(--blanco); }
.contacto .section-header p { color: rgba(255,255,255,0.75); }

.contact-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 40px;
}

.quote-form {
  background: var(--blanco);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.quote-form label { font-size: 0.85rem; font-weight: 600; margin-top: 12px; color: var(--azul-medio); }
.quote-form input,
.quote-form select,
.quote-form textarea {
  padding: 11px 14px;
  border: 1px solid #d7dde2;
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
  margin-top: 4px;
}
.quote-form input:focus,
.quote-form select:focus,
.quote-form textarea:focus { outline: 2px solid var(--naranja); border-color: var(--naranja); }

.btn-submit {
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #25D366;
  color: var(--blanco);
}
.btn-submit:hover { background: #1eb856; }

.form-note { font-size: 0.78rem; color: var(--gris-texto); margin-top: 10px; text-align: center; }

.contact-info {
  color: var(--blanco);
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 10px;
}
.contact-info h3 { color: var(--blanco); margin-bottom: 10px; }
.contact-info a { color: var(--naranja); }
.contact-tip {
  margin-top: 10px;
  padding: 14px 16px;
  border-left: 3px solid var(--naranja);
  background: rgba(255,255,255,0.06);
  border-radius: 6px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
}

/* ===================== FOOTER ===================== */
.footer { background: #0a1620; color: rgba(255,255,255,0.8); padding: 50px 20px 20px; }
.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.footer-col h4 { color: var(--blanco); margin-bottom: 14px; }
.footer-logo { width: 110px; height: auto; margin-bottom: 12px; }
.footer-col p { font-size: 0.88rem; }
.footer-col a { display: block; font-size: 0.88rem; padding: 5px 0; transition: color var(--transicion); }
.footer-col a:hover { color: var(--naranja); }

.footer-bottom {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.8rem;
}

/* ===================== BOTÓN FLOTANTE WHATSAPP ===================== */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #25D366;
  color: var(--blanco);
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.3);
  z-index: 999;
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(37,211,102,0.5); }
  70% { box-shadow: 0 0 0 14px rgba(37,211,102,0); }
  100% { box-shadow: 0 0 0 0 rgba(37,211,102,0); }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 960px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--azul-oscuro);
    flex-direction: column;
    align-items: center;
    padding: 0;
    gap: 18px;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transicion), padding var(--transicion);
  }
  .nav-links.open { max-height: 420px; padding: 20px 0; }
  .nav-toggle { display: flex; }
}

@media (max-width: 900px) {
  .nosotros { grid-template-columns: 1fr; }
  .nosotros-values { grid-template-columns: 1fr; }
  .contact-wrapper { grid-template-columns: 1fr; }
  .footer-container { grid-template-columns: 1fr; text-align: center; }
  .footer-logo { margin-left: auto; margin-right: auto; }
  .galeria-item img { height: 220px; }
}

@media (max-width: 480px) {
  .hero { height: 70vh; min-height: 420px; }
  .nav-logo img { height: 34px; }
  .nav-logo-text em { display: none; }
  .galeria-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .galeria-item img { height: 160px; }
  .galeria-item figcaption { font-size: 0.7rem; padding: 18px 10px 8px; }
  .stats { gap: 24px; }
}