:root {
  --azul-oscuro: #0f172a;
  --azul: #1e3a5f;
  --acento: #2563eb;
  --acento-claro: #60a5fa;
  --whatsapp: #25d366;
  --texto: #1e293b;
  --texto-claro: #64748b;
  --fondo-claro: #f8fafc;
  --borde: #e2e8f0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--texto);
  background: #fff;
}

.contenedor {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(6px);
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
}
.logo span { color: var(--acento-claro); }
.nav-principal { display: flex; gap: 28px; }
.nav-principal a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
}
.nav-principal a:hover { color: #fff; }
.btn-header { padding: 8px 16px; font-size: 0.85rem; }

.header-acciones { display: flex; align-items: center; gap: 14px; }
.btn-carrito {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.3rem;
  line-height: 1;
  padding: 4px;
}
.badge-carrito {
  position: absolute;
  top: -4px;
  right: -8px;
  background: #dc2626;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}
.badge-carrito.oculto { display: none; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primario { background: var(--acento); color: #fff; }
.btn-secundario { background: rgba(255,255,255,0.1); color: #fff; }
.btn-whatsapp { background: var(--whatsapp); color: #fff; }
.btn-grande { width: 100%; justify-content: center; padding: 15px; font-size: 1.05rem; }
.icono-wsp::before { content: "💬"; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--azul-oscuro), var(--azul));
  color: #fff;
  padding: 90px 0 70px;
}
.hero-inner { max-width: 720px; }
.hero h1 { font-size: 2.4rem; line-height: 1.15; margin: 0 0 18px; }
.hero p { font-size: 1.05rem; color: #cbd5e1; margin: 0 0 30px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Secciones genéricas ---------- */
.titulo-seccion { font-size: 1.8rem; margin: 0 0 8px; text-align: center; }
.subtitulo-seccion { text-align: center; color: var(--texto-claro); max-width: 620px; margin: 0 auto 40px; }
.servicios, .catalogo, .cotizador { padding: 70px 0; }
.servicios { background: var(--fondo-claro); }

/* ---------- Servicios / video de caso ---------- */
.grid-servicios {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}
.tarjeta-servicio {
  background: #fff;
  border: 1px solid var(--borde);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.video-caso {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 -- espacio reservado para el video de YouTube */
  background: #0f172a;
}
.video-caso iframe {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  border: 0;
}
.tarjeta-servicio h3 { margin: 18px 20px 6px; font-size: 1.1rem; }
.tarjeta-servicio p { margin: 0 20px 14px; color: var(--texto-claro); font-size: 0.92rem; flex: 1; }
.enlace-catalogo { margin: 0 20px 20px; color: var(--acento); font-weight: 700; text-decoration: none; font-size: 0.9rem; }

/* ---------- Catálogo ---------- */
.tabs-catalogo { display: flex; justify-content: center; gap: 10px; margin-bottom: 24px; }
.tab-catalogo {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--borde);
  background: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--texto-claro);
}
.tab-catalogo.activo { background: var(--acento); color: #fff; border-color: var(--acento); }

.categorias-catalogo { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-bottom: 30px; }
.pill-categoria {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--fondo-claro);
  border: 1px solid var(--borde);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--texto);
}
.pill-categoria.activo { background: var(--azul-oscuro); color: #fff; border-color: var(--azul-oscuro); }

.grid-productos {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.tarjeta-producto {
  border: 1px solid var(--borde);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
}
.img-producto {
  width: 100%;
  height: 140px;
  border-radius: 8px;
  background: var(--fondo-claro);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--texto-claro);
  font-size: 0.8rem;
  margin-bottom: 12px;
  overflow: hidden;
}
.img-producto img { width: 100%; height: 100%; object-fit: cover; }
.img-producto-clicable { cursor: pointer; }
.tarjeta-producto h4 { font-size: 0.95rem; margin: 0 0 4px; }
.tarjeta-producto .marca { font-size: 0.8rem; color: var(--texto-claro); margin: 0 0 12px; }
.btn-agregar {
  margin-top: auto;
  padding: 8px 0;
  border-radius: 8px;
  border: 1px solid var(--acento);
  background: #fff;
  color: var(--acento);
  font-weight: 700;
  cursor: pointer;
  font-size: 0.85rem;
}
.btn-agregar:hover { background: var(--acento); color: #fff; }
.btn-agregar.agregado { background: var(--acento); color: #fff; }

.mensaje-vacio { text-align: center; color: var(--texto-claro); grid-column: 1 / -1; }

/* ---------- Cotizador / carrito ---------- */
.carrito-caja {
  max-width: 640px;
  margin: 0 auto;
  border: 1px solid var(--borde);
  border-radius: 14px;
  padding: 28px;
}
.carrito-items { margin-bottom: 24px; }
.item-carrito {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--borde);
  gap: 12px;
}
.item-carrito .nombre { font-weight: 600; font-size: 0.9rem; }
.item-carrito .controles { display: flex; align-items: center; gap: 8px; }
.item-carrito button {
  width: 26px; height: 26px;
  border-radius: 6px;
  border: 1px solid var(--borde);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}
.item-carrito .quitar { color: #dc2626; border-color: #fecaca; }

.form-grupo { margin-bottom: 16px; }
.form-grupo label { display: block; font-size: 0.85rem; font-weight: 700; margin-bottom: 6px; }
.form-grupo input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--borde);
  border-radius: 8px;
  font-size: 0.95rem;
}
.form-grupo small { color: var(--texto-claro); font-size: 0.78rem; }
.form-error { color: #dc2626; font-size: 0.85rem; min-height: 1.2em; }

/* ---------- Footer ---------- */
.site-footer { background: var(--azul-oscuro); color: #cbd5e1; padding: 50px 0 20px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; margin-bottom: 30px; }
.footer-inner p { margin: 6px 0 0; font-size: 0.85rem; max-width: 420px; }
.footer-copy { text-align: center; font-size: 0.78rem; color: #64748b; margin: 0; }

/* ---------- Modal de producto (galeria) ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}
.modal-overlay.oculto { display: none; }

.modal-producto-caja {
  background: #fff;
  border-radius: 16px;
  max-width: 820px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  position: relative;
  padding: 24px;
}

.modal-cuerpo {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.modal-col-galeria { flex: 0 0 46%; }
.modal-info { flex: 1; min-width: 0; padding-top: 4px; }
.modal-cerrar {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: var(--fondo-claro);
  color: var(--texto);
  font-size: 1rem;
  cursor: pointer;
  z-index: 2;
}

.modal-galeria {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--fondo-claro);
  border-radius: 12px;
  overflow: hidden;
}
.modal-galeria img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.galeria-flecha {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  color: var(--texto);
}
.galeria-flecha-izq { left: 10px; }
.galeria-flecha-der { right: 10px; }

.galeria-miniaturas {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  justify-content: center;
}
.galeria-miniaturas img {
  width: 52px;
  height: 52px;
  object-fit: cover;
  border-radius: 8px;
  cursor: pointer;
  border: 2px solid transparent;
  opacity: 0.7;
}
.galeria-miniaturas img.activa {
  border-color: var(--acento);
  opacity: 1;
}

.modal-info h3 { margin: 0 0 10px; font-size: 1.2rem; }
.modal-descripcion {
  color: var(--texto);
  font-size: 0.9rem;
  margin: 0 0 14px;
  padding: 0;
  max-height: 38vh;
  overflow-y: auto;
  list-style: none;
}
.modal-descripcion li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  line-height: 1.4;
}
.modal-descripcion li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--acento);
  font-weight: 700;
}
.modal-descripcion li.sin-vinetas {
  color: var(--texto-claro);
}
.modal-descripcion li.sin-vinetas::before {
  content: "";
}
.enlace-ficha-tecnica { display: inline-block; color: var(--acento); font-weight: 700; font-size: 0.88rem; text-decoration: none; margin-bottom: 16px; }
.btn-agregar-modal { width: 100%; padding: 12px; font-size: 0.95rem; }

@media (max-width: 720px) {
  .nav-principal { display: none; }
  .hero h1 { font-size: 1.8rem; }
  .modal-cuerpo { flex-direction: column; }
  .modal-col-galeria { flex: 1 1 auto; width: 100%; }
  .modal-producto-caja { overflow-y: auto; }
}