/* ==========================================================================
   COOPEANDE - HELADOS ANDINOS EN LÍNEA
   Estilos Principales, Sistema de Diseño, Responsive & Accesibilidad (WCAG 2.1 AA)
   ========================================================================== */

:root {
  /* Paleta de Colores de Marca (Andina & Frutal) */
  --clr-primary: #D95338;
  --clr-primary-hover: #C04329;
  --clr-primary-light: #FDF0ED;
  --clr-secondary: #2D5A40;
  --clr-secondary-hover: #224531;
  --clr-secondary-light: #EDF4F0;
  --clr-accent: #F4AA3B;
  --clr-accent-light: #FFF8EB;
  --clr-accent-gold: #F7C568;
  --clr-berry: #9C27B0;
  
  /* Neutros & Fondos */
  --clr-bg: #FFFBF5;
  --clr-surface: #FFFFFF;
  --clr-surface-alt: #F7F4EE;
  --clr-border: #E5E0D8;
  --clr-text-main: #1C211F;
  --clr-text-muted: #5A6460;
  --clr-white: #FFFFFF;
  
  /* Tipografía */
  --font-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Sombras */
  --shadow-sm: 0 2px 8px rgba(28, 33, 31, 0.06);
  --shadow-md: 0 6px 16px rgba(28, 33, 31, 0.08);
  --shadow-lg: 0 12px 32px rgba(28, 33, 31, 0.12);
  --shadow-primary: 0 8px 20px rgba(217, 83, 56, 0.25);
  
  /* Bordes & Espaciado */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1200px;
}

/* Modo Oscuro Accesible */
[data-theme="dark"] {
  --clr-bg: #121614;
  --clr-surface: #1B211E;
  --clr-surface-alt: #242C28;
  --clr-border: #323D38;
  --clr-text-main: #F0F4F2;
  --clr-text-muted: #A0ABA5;
  --clr-primary-light: #3D1F18;
  --clr-secondary-light: #162B1F;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

/* Reset de Estilos Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

body {
  font-family: var(--font-base);
  background-color: var(--clr-bg);
  color: var(--clr-text-main);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Enlace directo para accesibilidad */
.skip-link {
  position: absolute;
  top: -60px;
  left: 1rem;
  background: var(--clr-primary);
  color: var(--clr-white);
  padding: 0.75rem 1.25rem;
  z-index: 10000;
  border-radius: var(--radius-sm);
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--clr-accent);
}

/* Foco accesible para navegación por teclado */
:focus-visible {
  outline: 3px solid var(--clr-secondary);
  outline-offset: 3px;
}

/* Clases de Utilidad */
.container {
  width: 90%;
  max-width: var(--container-max);
  margin: 0 auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-primary { color: var(--clr-primary); }
.text-secondary { color: var(--clr-secondary); }

/* Encabezados y Tipografía */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--clr-text-main);
  line-height: 1.25;
  font-weight: 800;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.6rem); margin-bottom: 0.75rem; }

p {
  margin-bottom: 1.25rem;
  color: var(--clr-text-muted);
}

/* Botones y CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

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

.btn-primary:hover {
  background-color: var(--clr-primary-hover);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: var(--clr-secondary-hover);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background-color: var(--clr-primary-light);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Badge Decorativos */
.badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary { background: var(--clr-primary-light); color: var(--clr-primary); }
.badge-secondary { background: var(--clr-secondary-light); color: var(--clr-secondary); }
.badge-accent { background: var(--clr-accent-light); color: #B36B00; }

/* Header & Navegación */
.site-header {
  position: sticky;
  top: 0;
  background-color: var(--clr-surface);
  border-bottom: 1px solid var(--clr-border);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 48px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  color: var(--clr-text-main);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--clr-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--clr-primary);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Botón Carrito */
.cart-trigger {
  position: relative;
  background: var(--clr-surface-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--clr-text-main);
  transition: var(--transition);
}

.cart-trigger:hover {
  background: var(--clr-primary-light);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}

.cart-count {
  background: var(--clr-primary);
  color: var(--clr-white);
  font-size: 0.75rem;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Menú Móvil Hamburger */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.75rem;
  color: var(--clr-text-main);
  cursor: pointer;
  padding: 0.25rem;
}

/* Secciones Principales */
.section {
  padding: 4.5rem 0;
}

.section-alt {
  background-color: var(--clr-surface-alt);
}

.section-header {
  max-width: 680px;
  margin: 0 auto 3rem auto;
  text-align: center;
}

/* Hero Section */
.hero-section {
  padding: 4rem 0 5rem 0;
  background: linear-gradient(135deg, var(--clr-bg) 0%, var(--clr-accent-light) 100%);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-content p {
  font-size: 1.15rem;
  margin-bottom: 2rem;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image-wrapper {
  text-align: center;
  position: relative;
}

.hero-img {
  width: 100%;
  max-width: 520px;
  height: auto;
  filter: drop-shadow(0 15px 30px rgba(0,0,0,0.1));
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Tarjetas de Características / Valores */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  padding: 2rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--clr-primary);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.25rem auto;
}

/* Tarjetas de Producto */
.products-filter {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text-muted);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
  background: var(--clr-primary);
  color: var(--clr-white);
  border-color: var(--clr-primary);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.product-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-thumb {
  background: var(--clr-surface-alt);
  padding: 2rem;
  text-align: center;
  position: relative;
}

.product-img {
  width: 100px;
  height: 100px;
  object-fit: contain;
}

.product-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-title {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.product-desc {
  font-size: 0.9rem;
  margin-bottom: 1rem;
  flex-grow: 1;
}

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

.product-price {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--clr-primary);
}

/* Métricas de Impacto Cooperativo */
.metrics-banner {
  background: var(--clr-secondary);
  color: var(--clr-white);
  padding: 3.5rem 0;
  border-radius: var(--radius-lg);
  margin: 2rem 0;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.metric-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--clr-accent-gold);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.metric-label {
  font-size: 0.95rem;
  opacity: 0.9;
}

/* Acordeón FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 1.5rem;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 1.5rem 1.25rem 1.5rem;
}

/* Formulario de Contacto & Buscador de Envíos */
.form-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  padding: 2.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  background: var(--clr-bg);
  color: var(--clr-text-main);
  transition: var(--transition);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--clr-primary);
  background: var(--clr-surface);
}

/* Drawer / Modal del Carrito */
.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

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

.cart-drawer {
  position: fixed;
  top: 0;
  right: -420px;
  width: 100%;
  max-width: 400px;
  height: 100%;
  background: var(--clr-surface);
  z-index: 2001;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  transition: right 0.35s ease-in-out;
}

.cart-overlay.active .cart-drawer {
  right: 0;
}

.cart-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cart-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--clr-text-muted);
}

.cart-items {
  padding: 1.5rem;
  flex-grow: 1;
  overflow-y: auto;
}

.cart-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--clr-border);
}

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

.cart-item-price {
  color: var(--clr-primary);
  font-weight: 700;
}

.cart-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--clr-border);
  background: var(--clr-surface-alt);
}

.cart-total {
  display: flex;
  justify-content: space-between;
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 3000;
}

.toast {
  background: var(--clr-secondary);
  color: var(--clr-white);
  padding: 0.9rem 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-weight: 600;
  margin-top: 0.5rem;
  animation: slideInRight 0.3s ease;
}

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

/* Footer */
.site-footer {
  background: #161D1A;
  color: #D1D8D4;
  padding: 4rem 0 2rem 0;
  border-top: 3px solid var(--clr-primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  color: var(--clr-white);
  margin-bottom: 1.25rem;
  font-size: 1.1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: #A0ABA5;
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--clr-accent-gold);
}

.footer-bottom {
  border-top: 1px solid #2B3530;
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9rem;
}

/* Media Queries (Responsive Design) */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-ctas {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--clr-surface);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--clr-border);
    box-shadow: var(--shadow-md);
    display: none;
  }

  .nav-menu.active {
    display: flex;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}