/**
 * =====================================================
 * ESTILOS MODERNOS Y COLORIDOS
 * Aplicación de Carrito de Compras
 * Compatible con dispositivos móviles
 * =====================================================
 */

/* ===== IMPORTAR FUENTES DE GOOGLE ===== */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ===== VARIABLES CSS PARA COLORES MODERNOS ===== */
:root {
  /* Colores principales */
  --primary-color: #667eea;
  --primary-dark: #5a6fd8;
  --secondary-color: #764ba2;
  --accent-color: #f093fb;
  
  /* Gradientes modernos */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-warning: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  --gradient-danger: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  
  /* Colores de categorías */
  --electronics-color: #e74c3c;
  --clothing-color: #9b59b6;
  --home-color: #f39c12;
  --sports-color: #27ae60;
  --books-color: #3498db;
  --beauty-color: #e91e63;
  
  /* Colores neutros */
  --white: #ffffff;
  --light-gray: #f8f9fa;
  --gray: #6c757d;
  --dark-gray: #343a40;
  --black: #000000;
  
  /* Sombras modernas */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
  --shadow-colored: 0 10px 30px rgba(102, 126, 234, 0.3);
  
  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Bordes */
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --border-radius-full: 50px;
  
  /* Transiciones */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ===== ESTILOS PARA EL LOGO ===== */
.logo {
  height: 50px;
  width: auto;
  max-width: 60px;
  object-fit: contain;
  vertical-align: middle;
  transition: transform 0.3s ease;
  filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.3));
}

.logo:hover {
  transform: scale(1.1);
}

/* Responsive para el logo */
@media (max-width: 768px) {
  .logo {
    height: 40px;
    max-width: 50px;
  }
}

@media (max-width: 480px) {
  .logo {
    height: 35px;
    max-width: 45px;
  }
}

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

body {
  font-family: 'Poppins', sans-serif;
  line-height: 1.6;
  color: var(--dark-gray);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
}

/* ===== UTILIDADES ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

/* ===== HEADER MODERNO (SIN STICKY) ===== */
.header {
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--spacing-lg) 0;
  box-shadow: var(--shadow-lg);
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
  margin-bottom: var(--spacing-sm);
}

.header p {
  font-size: 1.1rem;
  opacity: 0.9;
  font-weight: 300;
}

/* ===== CONTROLES STICKY (CATEGORÍAS Y BÚSQUEDA) ===== */
.sticky-controls {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: var(--shadow-lg);
  border-bottom: 3px solid var(--primary-color);
  padding: var(--spacing-lg) 0;
}

.category-filters-sticky {
  margin-bottom: var(--spacing-md);
}

.search-bar-sticky {
  max-width: 600px;
  margin: 0 auto;
}

.category-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.3s ease;
  padding: 0;
  opacity: 0;
}

.category-buttons.expanded {
  max-height: 500px;
  padding: var(--spacing-md) 0;
  opacity: 1;
}

/* Mostrar toggle solo en móvil */
.category-toggle {
  display: none;
  width: 100%;
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-normal);
  margin-bottom: var(--spacing-sm);
}

/* Mostrar categorías con toggle en desktop también */
@media (min-width: 769px) {
  .category-buttons {
    max-height: 0;
    padding: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.3s ease;
  }
  
  .category-buttons.expanded {
    max-height: 500px;
    padding: var(--spacing-md) 0;
    opacity: 1;
  }
  
  .category-toggle {
    display: block;
    margin-bottom: var(--spacing-md);
  }
}

.category-toggle:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.category-toggle i {
  margin-left: var(--spacing-sm);
  transition: transform var(--transition-normal);
}

.category-toggle.expanded i {
  transform: rotate(180deg);
}

/* ===== BOTONES DE CATEGORÍA - CORREGIDO ===== */
.category-btn {
  background: var(--white);
  border: 2px solid var(--light-gray);
  color: var(--dark-gray);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius-full);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.95rem;
  min-width: 120px;
  justify-content: center;
}

/* HOVER CORREGIDO - Background del mismo color que el borde */
.category-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  background: var(--category-color, var(--primary-color)) !important;
  border-color: var(--category-color, var(--primary-color));
  color: white !important;
}

/* Asegurar que todos los elementos dentro del botón sean blancos en hover */
.category-btn:hover * {
  color: white !important;
}

/* Estilo especial para badges en hover */
.category-btn:hover .badge {
  background: rgba(255, 255, 255, 0.2) !important;
  color: white !important;
}

.category-btn.active {
  background: var(--category-color, var(--primary-color)) !important;
  color: var(--white) !important;
  border-color: var(--category-color, var(--primary-color));
  box-shadow: var(--shadow-colored);
}

/* Asegurar que el texto del botón activo también sea visible */
.category-btn.active * {
  color: white !important;
}

/* Estilo especial para badges en categorías activas */
.category-btn.active .badge {
  background: rgba(255, 255, 255, 0.2) !important;
  color: white !important;
}

.category-btn i {
  font-size: 1.1rem;
}

/* Colores específicos para categorías con hover corregido */
.category-btn[data-category="1"] { border-color: var(--electronics-color); }
.category-btn[data-category="1"]:hover,
.category-btn[data-category="1"].active { 
  background: linear-gradient(135deg, var(--electronics-color), #c0392b) !important;
  border-color: var(--electronics-color);
  color: white !important;
}

.category-btn[data-category="2"] { border-color: var(--clothing-color); }
.category-btn[data-category="2"]:hover,
.category-btn[data-category="2"].active { 
  background: linear-gradient(135deg, var(--clothing-color), #8e44ad) !important;
  border-color: var(--clothing-color);
  color: white !important;
}

.category-btn[data-category="3"] { border-color: var(--home-color); }
.category-btn[data-category="3"]:hover,
.category-btn[data-category="3"].active { 
  background: linear-gradient(135deg, var(--home-color), #e67e22) !important;
  border-color: var(--home-color);
  color: white !important;
}

.category-btn[data-category="4"] { border-color: var(--sports-color); }
.category-btn[data-category="4"]:hover,
.category-btn[data-category="4"].active { 
  background: linear-gradient(135deg, var(--sports-color), #229954) !important;
  border-color: var(--sports-color);
  color: white !important;
}

.category-btn[data-category="5"] { border-color: var(--books-color); }
.category-btn[data-category="5"]:hover,
.category-btn[data-category="5"].active { 
  background: linear-gradient(135deg, var(--books-color), #2980b9) !important;
  border-color: var(--books-color);
  color: white !important;
}

.category-btn[data-category="6"] { border-color: var(--beauty-color); }
.category-btn[data-category="6"]:hover,
.category-btn[data-category="6"].active { 
  background: linear-gradient(135deg, var(--beauty-color), #ad1457) !important;
  border-color: var(--beauty-color);
  color: white !important;
}

/* ===== GRID DE PRODUCTOS ===== */
.products-section {
  margin: var(--spacing-xl) 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

/* ===== TARJETAS DE PRODUCTOS ===== */
.product-card {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  position: relative;
  border: 1px solid rgba(0,0,0,0.05);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-image {
  position: relative;
  overflow: hidden;
  height: 250px;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.product-card:hover .product-image img {
  transform: scale(1.1);
}

.product-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--gradient-danger);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-category {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  background: rgba(255,255,255,0.9);
  color: var(--dark-gray);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
}

.product-info {
  padding: var(--spacing-lg);
}

.product-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--dark-gray);
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.product-description {
  color: var(--gray);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-price {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.product-stock {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
}

.stock-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sports-color);
}

.stock-indicator.low { background: var(--electronics-color); }
.stock-indicator.medium { background: var(--home-color); }

/* ===== BOTONES MODERNOS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-normal);
  font-size: 0.95rem;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-colored);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

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

.btn-full {
  width: 100%;
}

/* ===== CARRITO DE COMPRAS ===== */
.cart-sidebar {
  position: fixed;
  top: 0;
  right: -400px;
  width: 400px;
  height: 100vh;
  background: var(--white);
  box-shadow: var(--shadow-xl);
  transition: var(--transition-normal);
  z-index: 2000;
  overflow-y: auto;
}

.cart-sidebar.open {
  right: 0;
}

.cart-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
}

.cart-overlay.active {
  opacity: 1;
  visibility: visible;
}

.cart-header {
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cart-header h3 {
  font-size: 1.3rem;
  font-weight: 600;
}

.cart-close {
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: var(--transition-fast);
}

.cart-close:hover {
  background: rgba(255,255,255,0.2);
}

.cart-content {
  padding: var(--spacing-lg);
}

.cart-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--light-gray);
  transition: var(--transition-fast);
}

.cart-item:hover {
  background: var(--light-gray);
}

.cart-item-image {
  width: 60px;
  height: 60px;
  border-radius: var(--border-radius);
  overflow: hidden;
  flex-shrink: 0;
}

.cart-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.cart-item-name {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
}

.cart-item-price {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.cart-item-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.quantity-btn {
  width: 30px;
  height: 30px;
  border: 1px solid var(--light-gray);
  background: var(--white);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.quantity-btn:hover {
  background: var(--primary-color);
  color: var(--white);
  border-color: var(--primary-color);
}

.quantity-display {
  min-width: 30px;
  text-align: center;
  font-weight: 500;
}

.cart-total {
  background: var(--light-gray);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  border-radius: var(--border-radius);
  text-align: center;
}

.cart-total-amount {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.cart-empty {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--gray);
}

.cart-empty i {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

/* ===== BOTÓN FLOTANTE DEL CARRITO ===== */
.cart-float-btn {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-xl);
  transition: var(--transition-normal);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cart-float-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-colored);
}

.cart-count {
  position: absolute;
  top: -5px;
  right: -5px;
  background: var(--electronics-color);
  color: var(--white);
  border-radius: 50%;
  width: 25px;
  height: 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ===== FORMULARIOS ===== */
.form-control {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--light-gray);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition-fast);
  background: var(--white);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* ===== LOADING Y ESTADOS ===== */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-2xl);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--light-gray);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.fade-in {
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .sticky-controls {
    padding: var(--spacing-md) 0;
  }
  
  .category-filters-sticky {
    margin-bottom: var(--spacing-sm);
  }
  
  .category-toggle {
    display: block;
  }
  
  .category-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.3s ease;
    padding: 0;
    opacity: 0;
  }
  
  .category-buttons.expanded {
    max-height: 400px; /* Altura suficiente para todas las categorías */
    overflow-y: auto; /* Scroll vertical cuando sea necesario */
    padding: var(--spacing-md) var(--spacing-xs) var(--spacing-md) 0;
    opacity: 1;
  }
  
  /* Scrollbar personalizado para móvil */
  .category-buttons::-webkit-scrollbar {
    width: 6px;
  }
  
  .category-buttons::-webkit-scrollbar-track {
    background: var(--light-gray);
    border-radius: 3px;
  }
  
  .category-buttons::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
  }
  
  .category-buttons::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
  }
  
  .category-btn {
    min-width: auto;
    padding: var(--spacing-sm);
    font-size: 0.8rem;
  }
  
  .search-bar-sticky {
    max-width: 100%;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  .cart-sidebar {
    width: 100%;
    right: -100%;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.6rem;
  }
  
  .header p {
    font-size: 0.9rem;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .category-buttons {
    grid-template-columns: 1fr;
  }
  
  .search-bar-sticky .input-group {
    flex-direction: row;
  }
  
  .search-bar-sticky .input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
  }
  
  .search-bar-sticky .input-group .btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    white-space: nowrap;
  }
}

/* ===== EFECTOS ESPECIALES ===== */
.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}