/**
 * ═══════════════════════════════════════════════════════════
 * CART PAGE CSS - Estilo Mercado Libre
 * Mobile-first, Dark Mode support
 * ═══════════════════════════════════════════════════════════
 */

/* ========== VARIABLES ESPECÍFICAS DEL CARRITO ========== */
:root {
  --cart-bg: #ebebeb;
  --cart-surface: #ffffff;
  --cart-border: rgba(0, 0, 0, 0.08);
  --cart-text: #333333;
  --cart-text-dim: #666666;
  --cart-success: #00a650;
  --cart-success-bg: rgba(0, 166, 80, 0.1);
  --cart-warning: #f73;
  --cart-primary: #3483fa;
  --cart-primary-hover: #2968c8;
  --cart-danger: #f23d4f;
  --cart-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12);
  --cart-shadow-hover: 0 8px 16px 0 rgba(0, 0, 0, 0.12);
  --cart-radius: 6px;
}

html.dark {
  --cart-bg: #1a1a1a;
  --cart-surface: #2d2d2d;
  --cart-border: rgba(255, 255, 255, 0.1);
  --cart-text: #f0f0f0;
  --cart-text-dim: #a0a0a0;
  --cart-success: #39c76d;
  --cart-success-bg: rgba(57, 199, 109, 0.15);
  --cart-primary: #4a9eff;
  --cart-primary-hover: #3d8ae6;
}

/* ========== RESET PARA PÁGINA DEL CARRITO ========== */
.cart-page {
  background: var(--cart-bg);
  min-height: 100vh;
  padding-bottom: 2rem;
}

.cart-page * {
  box-sizing: border-box;
}

/* ========== HEADER DEL CARRITO ========== */
.cart-header {
  background: var(--cart-surface);
  border-bottom: 1px solid var(--cart-border);
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--cart-shadow);
}

.cart-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cart-header__logo {
  height: 36px;
  width: auto;
}

@media (min-width: 768px) {
  .cart-header__logo {
    height: 60px;
  }
}

.cart-header__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--cart-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cart-header__count {
  font-size: 0.875rem;
  color: var(--cart-text-dim);
  font-weight: 400;
}

.cart-header__back {
  color: var(--cart-primary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.2s;
}

.cart-header__back:hover {
  color: var(--cart-primary-hover);
  text-decoration: underline;
}

/* ========== LAYOUT PRINCIPAL ========== */
.cart-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 1024px) {
  .cart-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.5rem;
  }
}

/* ========== COLUMNA DE PRODUCTOS ========== */
.cart-products {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cart-products__card {
  background: var(--cart-surface);
  border-radius: var(--cart-radius);
  box-shadow: var(--cart-shadow);
  overflow: hidden;
}

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

.cart-products__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--cart-text);
  margin: 0;
}

.cart-products__clear {
  color: var(--cart-primary);
  font-size: 0.875rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color 0.2s;
}

.cart-products__clear:hover {
  color: var(--cart-primary-hover);
  text-decoration: underline;
}

/* ========== ITEM DEL CARRITO ========== */
.cart-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--cart-border);
  transition: background 0.2s;
}

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

.cart-item:hover {
  background: rgba(0, 0, 0, 0.02);
}

html.dark .cart-item:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Imagen del producto */
.cart-item__image {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  border-radius: var(--cart-radius);
  overflow: hidden;
  background: #f5f5f5;
}

html.dark .cart-item__image {
  background: #3d3d3d;
}

.cart-item__image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@media (min-width: 768px) {
  .cart-item__image {
    width: 120px;
    height: 120px;
  }
}

/* Info del producto */
.cart-item__info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.cart-item__name {
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--cart-text);
  margin: 0;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.cart-item__name a {
  color: inherit;
  text-decoration: none;
}

.cart-item__name a:hover {
  color: var(--cart-primary);
}

.cart-item__brand {
  font-size: 0.8125rem;
  color: var(--cart-text-dim);
  margin: 0;
}

.cart-item__sku {
  font-size: 0.75rem;
  color: var(--cart-text-dim);
}

/* Stock indicator */
.cart-item__stock {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8125rem;
  color: var(--cart-success);
}

.cart-item__stock--low {
  color: var(--cart-warning);
}

.cart-item__stock--none {
  color: var(--cart-danger);
}

/* ========== CONTROLES DE CANTIDAD ========== */
.cart-item__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
  min-width: 100px;
}

@media (min-width: 768px) {
  .cart-item__actions {
    min-width: 150px;
  }
}

.quantity-control {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--cart-border);
  border-radius: var(--cart-radius);
  overflow: hidden;
  background: var(--cart-surface);
}

.quantity-control__btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--cart-primary);
  font-size: 1.25rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.quantity-control__btn:hover:not(:disabled) {
  background: var(--cart-success-bg);
}

.quantity-control__btn:disabled {
  color: var(--cart-text-dim);
  cursor: not-allowed;
  opacity: 0.5;
}

.quantity-control__value {
  min-width: 40px;
  text-align: center;
  font-size: 1rem;
  font-weight: 500;
  color: var(--cart-text);
  border-left: 1px solid var(--cart-border);
  border-right: 1px solid var(--cart-border);
  padding: 0.5rem;
}

/* Precio */
.cart-item__price {
  text-align: right;
}

.cart-item__price-current {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--cart-text);
  margin: 0;
}

.cart-item__price-unit {
  font-size: 0.75rem;
  color: var(--cart-text-dim);
  margin: 0;
}

/* Botón eliminar */
.cart-item__remove {
  background: none;
  border: none;
  color: var(--cart-primary);
  font-size: 0.8125rem;
  cursor: pointer;
  padding: 0;
  transition: color 0.2s;
}

.cart-item__remove:hover {
  color: var(--cart-danger);
  text-decoration: underline;
}

/* ========== CARRITO VACÍO ========== */
.cart-empty {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--cart-surface);
  border-radius: var(--cart-radius);
  box-shadow: var(--cart-shadow);
}

.cart-empty__icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.cart-empty__title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--cart-text);
  margin: 0 0 0.5rem;
}

.cart-empty__text {
  font-size: 1rem;
  color: var(--cart-text-dim);
  margin: 0 0 1.5rem;
}

.cart-empty__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: var(--cart-primary);
  color: #fff;
  border: none;
  border-radius: var(--cart-radius);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.cart-empty__btn:hover {
  background: var(--cart-primary-hover);
  transform: translateY(-1px);
  text-decoration: none;
}

/* ========== RESUMEN / SIDEBAR ========== */
.cart-summary {
  background: var(--cart-surface);
  border-radius: var(--cart-radius);
  box-shadow: var(--cart-shadow);
  padding: 1.25rem;
  position: sticky;
  top: 80px;
}

@media (min-width: 1024px) {
  .cart-summary {
    width: 340px;
    flex-shrink: 0;
  }
}

.cart-summary__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--cart-text);
  margin: 0 0 1rem;
}

/* Filas del resumen */
.cart-summary__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  font-size: 0.9375rem;
  color: var(--cart-text-dim);
}

.cart-summary__tax-note {
  font-size: 0.75rem;
  color: var(--cart-success);
  margin: -0.25rem 0 0.75rem;
  font-weight: 500;
}

.cart-summary__row--total {
  border-top: 1px solid var(--cart-border);
  margin-top: 0.5rem;
  padding-top: 1rem;
}

.cart-summary__row--total .cart-summary__label,
.cart-summary__row--total .cart-summary__value {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--cart-text);
}

.cart-summary__label {
  font-weight: 400;
}

.cart-summary__value {
  font-weight: 500;
  color: var(--cart-text);
}

.cart-summary__value--free {
  color: var(--cart-success);
  font-weight: 600;
}

/* Envío */
.cart-summary__shipping {
  margin: 1rem 0;
  padding: 1rem;
  background: var(--cart-success-bg);
  border-radius: var(--cart-radius);
}

.cart-summary__shipping-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--cart-success);
  margin: 0 0 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cart-summary__shipping-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cart-summary__shipping-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--cart-surface);
  border: 2px solid transparent;
  border-radius: var(--cart-radius);
  cursor: pointer;
  transition: border-color 0.2s;
}

.cart-summary__shipping-option:hover {
  border-color: var(--cart-border);
}

.cart-summary__shipping-option.selected {
  border-color: var(--cart-primary);
}

.cart-summary__shipping-option input {
  accent-color: var(--cart-primary);
  width: 18px;
  height: 18px;
}

.cart-summary__shipping-label {
  flex: 1;
}

.cart-summary__shipping-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--cart-text);
  margin: 0;
}

.cart-summary__shipping-detail {
  font-size: 0.75rem;
  color: var(--cart-text-dim);
  margin: 0.25rem 0 0;
}

.cart-summary__shipping-price {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--cart-text);
}

.cart-summary__shipping-price--free {
  color: var(--cart-success);
}

/* Botón de checkout */
.cart-summary__checkout {
  width: 100%;
  padding: 1rem;
  margin-top: 1rem;
  background: var(--cart-primary);
  color: #fff;
  border: none;
  border-radius: var(--cart-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.cart-summary__checkout:hover:not(:disabled) {
  background: var(--cart-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--cart-shadow-hover);
}

.cart-summary__checkout:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Métodos de pago */
.cart-summary__payment {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--cart-border);
}

.cart-summary__payment-title {
  font-size: 0.75rem;
  color: var(--cart-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 0.75rem;
}

.cart-summary__payment-icons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.cart-summary__payment-icon {
  width: 40px;
  height: 26px;
  object-fit: contain;
  border-radius: 4px;
  border: 1px solid var(--cart-border);
  background: #fff;
  padding: 2px;
}

/* ========== LOADING STATE ========== */
.cart-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  gap: 1rem;
}

.cart-loading__spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--cart-border);
  border-top-color: var(--cart-primary);
  border-radius: 50%;
  animation: cart-spin 0.8s linear infinite;
}

@keyframes cart-spin {
  to {
    transform: rotate(360deg);
  }
}

.cart-loading__text {
  font-size: 0.9375rem;
  color: var(--cart-text-dim);
}

/* ========== ANIMACIONES ========== */
.cart-item--removing {
  animation: cart-item-remove 0.3s ease-out forwards;
}

@keyframes cart-item-remove {
  from {
    opacity: 1;
    max-height: 200px;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  to {
    opacity: 0;
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
  }
}

.cart-item--updating .quantity-control {
  opacity: 0.6;
  pointer-events: none;
}

/* ========== TOAST NOTIFICATIONS ========== */
.cart-toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--cart-text);
  color: var(--cart-surface);
  padding: 0.875rem 1.5rem;
  border-radius: var(--cart-radius);
  font-size: 0.9375rem;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.cart-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

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

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

/* ========== RESPONSIVE AJUSTES ========== */
@media (max-width: 767px) {
  .cart-item {
    flex-wrap: wrap;
  }

  .cart-item__info {
    width: calc(100% - 96px);
  }

  .cart-item__actions {
    width: 100%;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--cart-border);
  }

  .cart-item__price {
    text-align: left;
  }
}

/* ========== MOBILE FIXED SUMMARY ========== */
@media (max-width: 1023px) {
  .cart-summary--mobile-fixed {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    padding-bottom: calc(1.25rem + env(safe-area-inset-bottom, 0));
    z-index: 100;
  }

  .cart-summary--mobile-fixed .cart-summary__shipping,
  .cart-summary--mobile-fixed .cart-summary__payment {
    display: none;
  }

  .cart-layout {
    padding-bottom: 180px;
  }
}