:root {
  --primary: #163A70;
  --primary-light: #2956A3;
  --accent: #F5A623;
  --bg: #F5F7FB;
  --surface: #FFFFFF;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --danger: #ef4444;
  --success: #22c55e;
  --radius: 20px;
  --radius-sm: 16px;
  --shadow: 0px 6px 18px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 20px rgba(22,58,112,0.25);
  --transition: 0.2s ease;
}

/* 1. RESET Y BASE */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: 'Poppins', sans-serif;
}

input, select {
  font-family: 'Poppins', sans-serif;
  outline: none;
}

/* 2. BANNER CERRADO */
#banner-cerrado {
  background-color: #7f1d1d; /* Rojo oscuro */
  color: white;
  text-align: center;
  padding: 12px 16px;
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9rem;
}

#banner-cerrado.visible {
  display: flex;
}

/* 3. HEADER */
header {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 8px 16px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-img {
  height: 55px;
  width: auto;
  object-fit: contain;
}

.header-text {
  display: flex;
  flex-direction: column;
}

.header-text .greeting {
  font-size: 0.75rem;
  opacity: 0.9;
}

.header-text h1 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-header-icon {
  color: white;
  font-size: 1.6rem;
  padding: 8px;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: opacity var(--transition);
}

.btn-header-icon:hover {
  opacity: 0.8;
}

#carrito-contador {
  position: absolute;
  top: 0;
  right: 0;
  background-color: var(--danger);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--primary);
}

@keyframes bump {
  0% { transform: scale(1); }
  50% { transform: scale(1.4); }
  100% { transform: scale(1); }
}

.bump-anim {
  animation: bump 0.3s ease-out;
}

main {
  padding: 10px 0;
  max-width: 1200px;
  margin: 0 auto;
}

/* 4. BUSCADOR */
.buscador-container {
  position: relative;
  padding: 0 16px;
  margin-bottom: 8px;
}

.buscador-container i {
  position: absolute;
  left: 32px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 1.2rem;
}

#buscador {
  width: 100%;
  padding: 14px 16px 14px 48px;
  border-radius: var(--radius-sm);
  border: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  font-size: 1rem;
  transition: box-shadow var(--transition);
  background: var(--surface);
}

#buscador:focus {
  box-shadow: 0 4px 12px rgba(22,58,112,0.15);
}

/* 5. CATEGORÍAS */
#categorias-scroll {
  display: flex;
  overflow-x: auto;
  gap: 8px;
  padding: 4px 16px 8px 16px;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
}

#categorias-scroll::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

.categoria-btn {
  padding: 8px 16px;
  background-color: white;
  color: var(--text);
  border: 1px solid #E5EAF3;
  border-radius: 50px; /* pill shape */
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  transition: all var(--transition);
}

.categoria-btn.active {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* 6. SKELETON LOADER & 7. PRODUCTOS GRID */
#skeleton-loader, #productos-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 4px 12px 12px 12px;
}

@media (min-width: 768px) {
  #skeleton-loader, #productos-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.skeleton-card {
  height: 220px;
  border-radius: var(--radius);
  background: linear-gradient(90deg, #e5e7eb 25%, #f3f4f6 50%, #e5e7eb 75%);
  background-size: 400% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* 8. TARJETA DE PRODUCTO */
.producto-card {
  background-color: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition);
}

.producto-card:hover {
  transform: translateY(-2px);
}

.producto-img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
  background-color: #e5e7eb;
}

.producto-info {
  padding: 8px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.producto-nombre {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--text);
  line-height: 1.2;
}

.producto-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 2px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.3;
}

.producto-precio {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin-top: auto;
  margin-bottom: 4px;
}

.producto-acciones-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 4px;
}

.cantidad-capsula {
  display: flex;
  align-items: center;
  background: var(--primary);
  border-radius: 30px;
  padding: 4px 8px;
  gap: 8px;
}

.cantidad-capsula .btn-cantidad {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: transparent;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background var(--transition);
}

@media (hover: hover) {
  .cantidad-capsula .btn-cantidad:hover {
    background-color: rgba(255, 255, 255, 0.2);
  }
}

.cantidad-capsula .btn-cantidad:active {
  background-color: rgba(255, 255, 255, 0.3);
}

.cantidad-capsula .btn-cantidad:focus {
  outline: none;
}

.cantidad-numero {
  font-weight: 600;
  font-size: 1rem;
  min-width: 20px;
  text-align: center;
  color: white;
}

.btn-agregar {
  background-color: var(--accent);
  color: white;
  flex: 1;
  padding: 12px;
  border-radius: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background var(--transition);
  font-size: 0.95rem;
}

.btn-agregar:hover {
  background-color: #e0961b;
}

/* 9. TARJETA SIN STOCK */
.producto-card.sin-stock {
  filter: grayscale(100%);
  pointer-events: none;
  opacity: 0.7;
}

.badge-sin-stock {
  position: absolute;
  top: 8px;
  right: 8px;
  background-color: var(--danger);
  color: white;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  z-index: 10;
}

/* 10. CARRITO OFF-CANVAS (REGLAS EXACTAS OBLIGATORIAS) */
#carrito-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
#carrito-overlay.abierto {
  opacity: 1;
  pointer-events: all;
}
body.no-scroll {
  overflow: hidden;
}

#carrito-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  height: 100dvh;
  width: min(420px, 100vw);
  background: var(--surface);
  z-index: 101;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-lg);
}
#carrito-panel.abierto {
  transform: translateX(0);
}
.carrito-header {
  flex-shrink: 0;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid #e5e7eb;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.carrito-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.carrito-footer {
  flex-shrink: 0;
  padding: 0.75rem 1rem;
  border-top: 1px solid #e5e7eb;
  background: var(--surface);
}

.carrito-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
}

#btn-cerrar-carrito {
  font-size: 1.5rem;
  color: var(--text-muted);
}

/* 11. ITEM DEL CARRITO */
.carrito-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid #f3f4f6;
}

.carrito-item-img {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background-color: #e5e7eb;
}

.carrito-item-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.carrito-item-nombre {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}

.carrito-item-precio {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.95rem;
}

.carrito-item-controles {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-carrito-qty {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--bg);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.btn-eliminar-item {
  color: var(--danger);
  font-size: 1.2rem;
  padding: 4px;
}

#carrito-vacio {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-muted);
  gap: 8px;
  padding: 2rem 0;
}

/* 12. FORMULARIO DATOS ALUMNO */
.datos-alumno-section {
  margin-top: 16px;
  background-color: var(--bg);
  padding: 16px;
  border-radius: var(--radius-sm);
}

.datos-alumno-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--primary);
}

.datos-alumno-section input,
.datos-alumno-section select {
  width: 100%;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid #d1d5db;
  margin-bottom: 12px;
  background-color: var(--surface);
  transition: border-color var(--transition);
}

.datos-alumno-section input:focus,
.datos-alumno-section select:focus {
  border-color: var(--primary);
}

.datos-alumno-section label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  display: block;
}

/* 13. BOTÓN WHATSAPP */
.carrito-footer p {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.carrito-footer strong {
  font-size: 1.4rem;
  color: var(--primary);
}

#btn-enviar-whatsapp {
  width: 100%;
  background-color: #25D366;
  color: white;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 10px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background-color var(--transition), opacity var(--transition);
}

#btn-enviar-whatsapp i {
  font-size: 1.8rem;
}

#btn-enviar-whatsapp:hover:not(:disabled) {
  background-color: #1ebc5a;
}

#btn-enviar-whatsapp:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 14. TOAST NOTIFICACIONES */
#toast-container {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideIn 0.3s ease forwards;
}

.toast.fade-out {
  animation: fadeOut 0.3s ease forwards;
}

.toast-info {
  background-color: var(--primary);
}

.toast-error {
  background-color: var(--danger);
}

.toast-success {
  background-color: var(--success);
}

@keyframes slideIn {
  from { transform: translateY(-100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes fadeOut {
  from { transform: translateY(0); opacity: 1; }
  to { transform: translateY(-100%); opacity: 0; }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* 15. MODAL NINJA (ADMIN) */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.activo {
  opacity: 1;
  pointer-events: all;
}

.modal-panel {
  background: var(--surface);
  border-radius: var(--radius);
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  transform: translateY(20px);
  transition: transform var(--transition);
  padding: 24px;
}

.modal-overlay.activo .modal-panel {
  transform: translateY(0);
}

.modal-panel h3 {
  margin-bottom: 16px;
  color: var(--primary);
  text-align: center;
}

.modal-panel input {
  margin-bottom: 12px;
  width: 100%;
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: var(--radius-md);
  text-align: center;
  font-family: inherit;
  font-size: 1rem;
  box-sizing: border-box;
}

.modal-panel input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.1);
}

.modal-panel .btn-primary {
  width: 100%;
  background-color: var(--primary);
  color: white;
  padding: 10px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-top: 8px;
}

.modal-panel .btn-secundario {
  width: 100%;
  background-color: transparent;
  color: var(--text-muted);
  padding: 10px;
  margin-top: 8px;
  font-weight: 600;
}

/* 16. ERROR CARGA */
#error-carga {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

#error-carga p {
  margin: 16px 0;
  font-size: 1.1rem;
}

#btn-reintentar {
  background-color: var(--primary);
  color: white;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* 17. PESTAÑAS LONCHERAS (CARRITO) */
.tab-lonchera {
  background: transparent;
  border: 1px solid #d1d5db;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
  position: relative;
  margin-bottom: 8px;
}

.tab-lonchera.activa {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.tab-lonchera .btn-eliminar-lonchera {
  margin-left: 6px;
  color: inherit;
  opacity: 0.6;
}

.tab-lonchera .btn-eliminar-lonchera:hover {
  opacity: 1;
}

#btn-nueva-lonchera:hover {
  background: #e0e7ff;
}