:root {
  --color-primario: #b5451b;
  --color-primario-oscuro: #8f3614;
  --color-oscuro: #2b2320;
  --color-fondo: #f7f4f1;
  --color-borde: #e2dcd6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  background: var(--color-fondo);
  color: var(--color-oscuro);
}

a { color: inherit; }

/* Barra superior */
.topbar {
  background: var(--color-oscuro);
  color: #ddd6d1;
  font-size: 0.8rem;
}

.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.4rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.topbar-inner a { text-decoration: none; }
.topbar-inner a:hover { color: white; }

.topbar-social {
  display: flex;
  gap: 1rem;
}

/* Header principal */
.site-header {
  background: white;
  border-bottom: 1px solid var(--color-borde);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.3rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--color-oscuro);
}

.logo span {
  font-weight: 400;
  color: var(--color-primario);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-oscuro);
  font-weight: 500;
}

.main-nav a.activo {
  color: var(--color-primario);
}

.btn-cotiza {
  background: var(--color-primario);
  color: white !important;
  padding: 0.55rem 1.1rem;
  border-radius: 6px;
  font-weight: 600;
}

.btn-cotiza:hover {
  background: var(--color-primario-oscuro);
}

nav.tabs {
  display: flex;
  gap: 0.5rem;
  padding: 1rem 1.5rem 0;
  max-width: 1200px;
  margin: 0 auto;
}

nav.tabs button {
  background: none;
  border: none;
  padding: 0.6rem 1rem;
  font-size: 1rem;
  cursor: pointer;
  color: var(--color-oscuro);
  border-bottom: 3px solid transparent;
}

nav.tabs button.activo {
  border-bottom-color: var(--color-primario);
  font-weight: 600;
}

main {
  padding: 1rem 1.5rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
  min-height: 50vh;
}

#categoria-filtros {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.filtro {
  border: 1px solid var(--color-borde);
  background: white;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
}

.filtro.activo {
  background: var(--color-primario);
  color: white;
  border-color: var(--color-primario);
}

#grid, #servicios-lista {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.1rem;
}

.card, .servicio-card {
  background: white;
  border: 1px solid var(--color-borde);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s, transform 0.15s;
}

.card:hover {
  box-shadow: 0 6px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.card-img {
  aspect-ratio: 4 / 3;
  background: var(--color-fondo);
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 0.8rem;
}

.card-body, .servicio-card {
  padding: 0.9rem;
}

.card-categoria {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--color-primario);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.card-body h3, .servicio-card h3 {
  font-size: 1rem;
  margin: 0.25rem 0;
}

.card-precio {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-primario);
  margin: 0.25rem 0;
}

.servicio-precio {
  font-weight: 800;
  color: var(--color-primario);
  margin: 0.25rem 0;
}

.card-stock {
  font-size: 0.8rem;
  color: #777;
  margin: 0;
}

.servicio-desc {
  font-size: 0.85rem;
  color: #555;
}

.cargando, .error, .vacio {
  grid-column: 1 / -1;
  text-align: center;
  color: #777;
  padding: 2rem 0;
}

.error { color: var(--color-primario); }

/* Botón flotante de WhatsApp */
.whatsapp-float {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  background: #25D366;
  color: white;
  text-decoration: none;
  padding: 0.75rem 1.1rem;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  z-index: 50;
}

/* Footer */
.site-footer {
  background: var(--color-oscuro);
  color: #ddd6d1;
  padding: 2.5rem 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-col h4 {
  color: white;
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}

.footer-col p {
  margin: 0.35rem 0;
  font-size: 0.9rem;
}

.footer-col a {
  text-decoration: none;
}

.footer-col a:hover {
  color: white;
}

/* Formulario de cotización */
.form-cotizador {
  max-width: 720px;
  margin: 0 auto;
  background: white;
  border: 1px solid var(--color-borde);
  border-radius: 12px;
  padding: 2rem;
}

.form-paso { display: none; }
.form-paso.activo { display: block; }

.form-paso h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.form-grupo {
  margin-bottom: 1.25rem;
}

.form-grupo label.titulo {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.form-grupo input[type="text"],
.form-grupo input[type="tel"],
.form-grupo input[type="email"],
.form-grupo input[type="number"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-borde);
  border-radius: 6px;
  font-size: 0.95rem;
}

.opciones-radio {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.6rem;
}

.opcion-card {
  border: 1px solid var(--color-borde);
  border-radius: 8px;
  padding: 0.75rem;
  cursor: pointer;
  text-align: center;
  font-size: 0.9rem;
}

.opcion-card.seleccionada {
  border-color: var(--color-primario);
  background: #fbeee7;
  font-weight: 600;
}

.lote-fila {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: 0.5rem;
  align-items: end;
  margin-bottom: 0.6rem;
}

.lote-fila label {
  font-size: 0.75rem;
  color: #666;
  display: block;
  margin-bottom: 0.2rem;
}

.btn-quitar-lote {
  background: none;
  border: 1px solid var(--color-borde);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  cursor: pointer;
  color: var(--color-primario);
}

.btn-secundario, .btn-primario {
  border: none;
  border-radius: 6px;
  padding: 0.65rem 1.2rem;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
}

.btn-secundario {
  background: var(--color-fondo);
  color: var(--color-oscuro);
  border: 1px solid var(--color-borde);
}

.btn-primario {
  background: var(--color-primario);
  color: white;
}

.btn-primario:hover { background: var(--color-primario-oscuro); }

.form-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 1.5rem;
}

.resumen-item {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--color-borde);
  font-size: 0.9rem;
}

.confirmacion {
  text-align: center;
  padding: 2rem 0;
}