:root {
  --verde: #2e7d32;
  --verde-claro: #e8f5e9;
  --naranja: #ef6c00;
  --naranja-claro: #fff3e0;
  --rojo: #c62828;
  --gris-borde: #e0e0e0;
  --gris-texto: #616161;
  --fondo: #f5f5f4;
  --texto: #212121;
  --radio: 12px;
  --sombra: 0 2px 8px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--fondo);
  color: var(--texto);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body { padding-bottom: env(safe-area-inset-bottom); }

.oculto { display: none !important; }

h1 { font-size: 1.3rem; margin: 0; }
h2 { font-size: 1.15rem; margin: 0 0 1rem; }

button { font-family: inherit; cursor: pointer; }
input, select { font-family: inherit; font-size: 1rem; }

/* ---------- Pantalla "¿quién eres?" ---------- */
.pantalla-usuario {
  position: fixed;
  inset: 0;
  background: var(--verde);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 100;
}

.pantalla-usuario-caja {
  background: #fff;
  border-radius: var(--radio);
  padding: 2rem 1.5rem;
  width: 100%;
  max-width: 360px;
  text-align: center;
  box-shadow: var(--sombra);
}

.pantalla-usuario-caja h1 { font-size: 1.6rem; margin-bottom: 0.25rem; }
.casa {
  margin: 0 0 0.9rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--verde);
}
.subtitulo { color: var(--gris-texto); margin: 0 0 1.25rem; font-size: 1.05rem; }

#select-usuario {
  width: 100%;
  padding: 0.9rem;
  border-radius: var(--radio);
  border: 1px solid var(--gris-borde);
  margin-bottom: 1rem;
  background: #fff;
}

/* ---------- Botones ---------- */
.btn-primario, .btn-secundario {
  padding: 0.9rem 1.2rem;
  border-radius: var(--radio);
  border: none;
  font-size: 1rem;
  font-weight: 600;
  min-height: 48px;
}

.btn-primario {
  background: var(--verde);
  color: #fff;
}
.btn-primario:disabled { background: #a5d6a7; }

.btn-secundario {
  background: #eee;
  color: var(--texto);
}

.btn-ancho { width: 100%; }

/* ---------- Cabecera y tabs ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--verde);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1rem;
  padding-top: calc(0.9rem + env(safe-area-inset-top));
}

.app-header-titulo { display: flex; flex-direction: column; line-height: 1.15; }
.app-header-titulo h1 { font-size: 1.15rem; }
.app-header-casa {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.85);
}

.btn-usuario {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
}
.btn-usuario .link { text-decoration: underline; }

.tabs {
  display: flex;
  background: #fff;
  border-bottom: 1px solid var(--gris-borde);
  position: sticky;
  top: 56px;
  z-index: 19;
}

.tab-btn {
  flex: 1;
  border: none;
  background: none;
  padding: 0.85rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gris-texto);
  border-bottom: 3px solid transparent;
}
.tab-btn.activo {
  color: var(--verde);
  border-bottom-color: var(--verde);
}

main { padding: 0.75rem 0.75rem 6rem; max-width: 640px; margin: 0 auto; }

/* ---------- Aviso "tienes carrito propio" ---------- */
.aviso-carrito {
  background: var(--naranja-claro);
  border: 1px solid var(--naranja);
  border-radius: var(--radio);
  padding: 0.85rem;
  margin-bottom: 0.9rem;
}
.aviso-carrito p { margin: 0 0 0.6rem; font-size: 0.92rem; }
.aviso-carrito .fila-botones { display: flex; gap: 0.5rem; }
.aviso-carrito .fila-botones button { flex: 1; }

/* ---------- Lista de productos ---------- */
.categoria-grupo { margin-bottom: 1.1rem; }
.categoria-titulo {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--gris-texto);
  margin: 0 0 0.4rem 0.15rem;
  font-weight: 700;
}

.producto-card {
  background: #fff;
  border-radius: var(--radio);
  padding: 0.75rem;
  margin-bottom: 0.55rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  box-shadow: var(--sombra);
  border: 1px solid transparent;
}

.producto-card.en-carrito-otro {
  background: var(--naranja-claro);
  border-color: #ffcc80;
}
.producto-card.en-carrito-propio {
  background: var(--verde-claro);
  border-color: #a5d6a7;
}

.producto-check {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  accent-color: var(--verde);
}

.producto-foto-mini {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
  background: #eee;
}

.producto-info { flex: 1; min-width: 0; }
.producto-nombre { font-weight: 600; font-size: 1rem; word-break: break-word; }
.producto-nombre.tachado { text-decoration: line-through; color: var(--gris-texto); }
.producto-cantidad { font-size: 0.85rem; color: var(--gris-texto); }
.producto-meta { font-size: 0.78rem; color: var(--gris-texto); margin-top: 0.15rem; }
.producto-meta .comprando { color: var(--naranja); font-weight: 600; }
.producto-meta .propio { color: var(--verde); font-weight: 600; }

.producto-acciones { display: flex; flex-direction: column; align-items: flex-end; gap: 0.3rem; }
.btn-liberar {
  background: none;
  border: none;
  color: var(--rojo);
  font-size: 0.78rem;
  text-decoration: underline;
  padding: 0.2rem;
}

.vacio { text-align: center; color: var(--gris-texto); margin-top: 3rem; padding: 0 1rem; }

/* ---------- Barra de selección inferior ---------- */
.barra-seleccion {
  position: fixed;
  left: 0.75rem;
  right: 0.75rem;
  bottom: calc(0.75rem + env(safe-area-inset-bottom));
  background: var(--verde);
  color: #fff;
  border-radius: var(--radio);
  padding: 0.7rem 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  z-index: 30;
  max-width: 640px;
  margin: 0 auto;
}
.barra-seleccion #contador-seleccion { font-weight: 600; font-size: 0.9rem; }
.barra-seleccion button {
  background: #fff;
  color: var(--verde);
}

/* ---------- Botón flotante añadir ---------- */
.fab {
  position: fixed;
  right: 1.1rem;
  bottom: calc(1.1rem + env(safe-area-inset-bottom));
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: none;
  background: var(--verde);
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  box-shadow: 0 4px 14px rgba(0,0,0,0.3);
  z-index: 25;
}
.fab:active { transform: scale(0.94); }

/* Cuando la barra de selección está visible, subimos el FAB para que no se solapen */
.barra-seleccion:not(.oculto) ~ .fab,
#app:has(.barra-seleccion:not(.oculto)) .fab {
  bottom: calc(4.7rem + env(safe-area-inset-bottom));
}

/* ---------- Modal añadir producto ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: flex-end;
}
.modal-fondo {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
}
.modal-contenido {
  position: relative;
  background: #fff;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  border-radius: 18px 18px 0 0;
  padding: 1.25rem 1.25rem calc(1.25rem + env(safe-area-inset-bottom));
  max-height: 88vh;
  overflow-y: auto;
}

#form-anadir { display: flex; flex-direction: column; gap: 0.9rem; }
#form-anadir label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gris-texto);
}
#form-anadir input[type="text"],
#form-anadir select {
  padding: 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--gris-borde);
  font-size: 1rem;
  color: var(--texto);
}
#form-anadir input[type="file"] { font-size: 0.85rem; }

.preview-foto { position: relative; width: 100px; }
.preview-foto img {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--gris-borde);
}
.btn-quitar-foto {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  background: var(--rojo);
  color: #fff;
  font-size: 0.9rem;
}

.error { color: var(--rojo); font-size: 0.88rem; margin: 0; }

.modal-botones { display: flex; gap: 0.6rem; margin-top: 0.4rem; }
.modal-botones button { flex: 1; }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 60;
  padding: 1rem;
}
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 8px; }

/* ---------- Historial ---------- */
.historial-item {
  background: #fff;
  border-radius: var(--radio);
  padding: 0.75rem;
  margin-bottom: 0.55rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  box-shadow: var(--sombra);
}
.historial-info { flex: 1; min-width: 0; }
.historial-nombre { font-weight: 600; }
.historial-meta { font-size: 0.78rem; color: var(--gris-texto); margin-top: 0.15rem; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  background: #323232;
  color: #fff;
  padding: 0.75rem 1.1rem;
  border-radius: 10px;
  font-size: 0.9rem;
  z-index: 90;
  max-width: 88vw;
  text-align: center;
  box-shadow: var(--sombra);
}

@media (min-width: 480px) {
  .pantalla-usuario-caja { padding: 2.5rem 2rem; }
}