/* ==========================================================================
   DISEÑO VANGUARDISTA Y SISTEMA DE ESTILOS - E-COMMERCE CON INVENTARIO Y CRM
   ========================================================================== */

:root {
  /* Paleta Oscura Premium (Default) */
  --bg-body: #0a0e17;
  --bg-surface: #121826;
  --bg-card: rgba(26, 34, 52, 0.75);
  --bg-modal: rgba(18, 24, 38, 0.95);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.25);
  
  --stock-green: #10b981;
  --stock-green-bg: rgba(16, 185, 129, 0.15);
  --stock-amber: #f59e0b;
  --stock-amber-bg: rgba(245, 158, 11, 0.15);
  --stock-red: #ef4444;
  --stock-red-bg: rgba(239, 68, 68, 0.15);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Modo Claro */
[data-theme="light"] {
  --bg-body: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-modal: rgba(255, 255, 255, 0.98);
  --border-color: rgba(0, 0, 0, 0.08);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
}

/* Base resets */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

/* Contenedor principal */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem 1.5rem;
}

/* ==========================================================================
   HEADER Y NAVEGACIÓN
   ========================================================================== */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-surface);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
}

.nav-wrapper {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #818cf8, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary), #a855f7);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* Buscador */
.search-container {
  flex: 1;
  max-width: 500px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.search-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* Desplegable Autocompletado de Búsqueda */
.search-dropdown-panel {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  background: var(--bg-modal);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 500;
  max-height: 420px;
  overflow-y: auto;
  backdrop-filter: blur(16px);
  padding: 0.5rem 0;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition-fast);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: rgba(99, 102, 241, 0.15);
}

.search-result-img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 6px;
}

.search-result-info {
  flex: 1;
}

.search-result-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.search-result-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* Acciones del Header */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-action {
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
}

.btn-action:hover {
  background: var(--bg-card);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
  color: white;
  border: none;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-primary-hover), #4338ca);
  transform: translateY(-2px);
}

.cart-badge {
  background: var(--stock-red);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  position: absolute;
  top: -6px;
  right: -6px;
  box-shadow: 0 2px 6px rgba(239, 68, 68, 0.4);
}

/* ==========================================================================
   HERO Y BARRA DE CATEGORÍAS
   ========================================================================== */

.hero-banner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(168, 85, 247, 0.1));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  backdrop-filter: blur(10px);
}

.hero-content h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.hero-content p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
}

.hero-tags {
  display: flex;
  gap: 1rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

.hero-tag {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Filtros de Categorías */
.category-nav {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.category-chip {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.6rem 1.4rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.category-chip:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.category-chip.active {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* ==========================================================================
   GRID DE PRODUCTOS Y TARJETAS
   ========================================================================== */

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.75rem;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
  backdrop-filter: blur(8px);
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: var(--shadow-lg);
}

.product-image-container {
  width: 100%;
  height: 240px;
  background: rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.product-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.product-card:hover .product-image {
  transform: scale(1.06);
}

.category-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(4px);
  color: #a5b4fc;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-transform: uppercase;
}

.stock-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.stock-badge.in-stock {
  background: var(--stock-green-bg);
  color: var(--stock-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.stock-badge.low-stock {
  background: var(--stock-amber-bg);
  color: var(--stock-amber);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.stock-badge.out-stock {
  background: var(--stock-red-bg);
  color: var(--stock-red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.product-info {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.product-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

.product-price {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
}

.btn-add-cart {
  background: var(--accent-primary);
  color: white;
  border: none;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition-fast);
}

.btn-add-cart:hover:not(:disabled) {
  background: var(--accent-primary-hover);
  transform: translateY(-2px);
}

.btn-add-cart:disabled {
  background: var(--text-muted);
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==========================================================================
   MODALES Y DRAWERS
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-modal);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 900px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform 0.3s ease;
  overflow: hidden;
}

.modal-backdrop.open .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.btn-close:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.modal-body {
  padding: 1.75rem;
  overflow-y: auto;
  flex: 1;
}

/* Items del Carrito */
.cart-items-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.cart-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.9rem;
  border-radius: var(--radius-sm);
}

.cart-item-img {
  width: 60px;
  height: 60px;
  object-fit: contain;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 6px;
}

.cart-item-info {
  flex: 1;
}

.cart-item-title {
  font-weight: 700;
  font-size: 0.95rem;
}

.cart-item-price {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.qty-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.2rem;
}

.btn-qty {
  background: transparent;
  border: none;
  color: var(--text-primary);
  width: 28px;
  height: 28px;
  font-weight: 700;
  cursor: pointer;
  border-radius: 4px;
}

.btn-qty:hover {
  background: var(--accent-primary);
  color: white;
}

.qty-number {
  font-weight: 700;
  font-size: 0.9rem;
  min-width: 24px;
  text-align: center;
}

.btn-remove {
  color: var(--stock-red);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

.btn-remove:hover {
  background: var(--stock-red-bg);
}

/* Formulario de Checkout */
.checkout-form {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-control {
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-control:focus {
  border-color: var(--border-focus);
}

.cart-summary {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  margin-top: 1rem;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 1.1rem;
  font-weight: 700;
}

/* ==========================================================================
   PANEL DE ADMINISTRACIÓN Y CRM
   ========================================================================== */

.admin-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.admin-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.admin-tab-btn.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.admin-table-container {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.admin-table th {
  background: var(--bg-surface);
  padding: 1rem;
  color: var(--text-secondary);
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

.admin-table td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.stock-input-inline {
  width: 70px;
  padding: 0.4rem;
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 700;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.9rem 1.4rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 280px;
  animation: slideIn 0.3s ease;
}

.toast.success { border-left: 4px solid var(--stock-green); }
.toast.error { border-left: 4px solid var(--stock-red); }
.toast.warning { border-left: 4px solid var(--stock-amber); }

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

/* Responsividad */
@media (max-width: 768px) {
  .nav-wrapper {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-banner {
    flex-direction: column;
    padding: 1.5rem;
  }
  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}