:root {
  --azul-oscuro: #0f172a;
  --azul: #1e3a5f;
  --acento: #2563eb;
  --acento-claro: #60a5fa;
  --whatsapp: #25d366;
  --texto: #1e293b;
  --texto-claro: #64748b;
  --fondo-claro: #f8fafc;
  --borde: #e2e8f0;
  --disponible: #16a34a;
  --agotado: #94a3b8;
}

* { 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); }
.header-acciones { display: flex; align-items: center; gap: 14px; }

/* ---------- 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-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: 80px 0 60px;
}
.hero-inner { max-width: 720px; }
.hero h1 { font-size: 2.2rem; line-height: 1.15; margin: 0 0 18px; }
.hero p { font-size: 1.05rem; color: #cbd5e1; margin: 0 0 30px; }

/* ---------- 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; }
.catalogo { padding: 60px 0; }

/* ---------- Catálogo / filtros ---------- */
.filtros-catalogo {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.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); }

.buscador-catalogo {
  max-width: 420px;
  margin: 0 auto 30px;
}
.buscador-catalogo input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--borde);
  border-radius: 10px;
  font-size: 0.95rem;
}

.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;
  cursor: pointer;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.tarjeta-producto:hover { box-shadow: 0 8px 20px rgba(0,0,0,0.08); transform: translateY(-2px); }
.img-producto {
  width: 100%;
  height: 150px;
  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: contain; }
.tarjeta-producto h4 { font-size: 1rem; margin: 0 0 4px; }
.tarjeta-producto .medida { font-size: 0.85rem; color: var(--texto-claro); font-family: 'Consolas', monospace; margin: 0 0 8px; }
.badge-disponibilidad {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  width: fit-content;
}
.badge-disponibilidad.disponible { background: #dcfce7; color: var(--disponible); }
.badge-disponibilidad.agotado { background: #f1f5f9; color: var(--agotado); }
.btn-ver-producto {
  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;
}
.tarjeta-producto:hover .btn-ver-producto { background: var(--acento); color: #fff; }

.mensaje-vacio { text-align: center; color: var(--texto-claro); grid-column: 1 / -1; padding: 40px 0; }

/* ---------- 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 ---------- */
.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: 780px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: 24px;
}
.modal-cuerpo { display: flex; gap: 24px; align-items: flex-start; }
.modal-col-galeria { flex: 0 0 44%; }
.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 {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--fondo-claro);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-galeria img { width: 100%; height: 100%; object-fit: contain; }
.modal-info h3 { margin: 0 0 4px; font-size: 1.2rem; }
.modal-info .medida-modal { font-family: 'Consolas', monospace; color: var(--texto-claro); margin: 0 0 14px; }
.modal-descripcion { color: var(--texto); font-size: 0.92rem; line-height: 1.6; margin: 0 0 20px; }
.btn-agregar-modal { width: 100%; padding: 12px; font-size: 0.95rem; }

@media (max-width: 720px) {
  .hero h1 { font-size: 1.7rem; }
  .modal-cuerpo { flex-direction: column; }
  .modal-col-galeria { flex: 1 1 auto; width: 100%; }
}