/**
 * Item Exchange Platform - Plugin Core Styles
 * Component-specific styles, AJAX transitions, and interactive elements
 */

/* ============================================
   Status Badge Component
   ============================================ */
.exchange-item-status {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  z-index: var(--z-base);
}

.exchange-status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.exchange-status-badge:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Status Icon Indicators */
.exchange-status-icon {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================
   Matching Indicator Component
   ============================================ */
.exchange-match-indicator {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
  color: #000;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  box-shadow: var(--shadow-md);
  animation: exchange-pulse 2s ease-in-out infinite;
  z-index: var(--z-base);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.exchange-match-indicator::before {
  content: '\2728';
  font-size: var(--font-size-sm);
  animation: exchange-rotate 3s linear infinite;
}

@keyframes exchange-pulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: var(--shadow-md);
  }
  50% {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
  }
}

@keyframes exchange-rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ============================================
   Message Button Component
   ============================================ */
.exchange-message-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: var(--color-primary-text);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.exchange-message-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.exchange-message-button:hover::before {
  width: 300px;
  height: 300px;
}

.exchange-message-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.exchange-message-button:active {
  transform: translateY(0);
}

.exchange-message-button-icon {
  width: 18px;
  height: 18px;
  position: relative;
  z-index: 1;
}

.exchange-message-button-icon::before {
  content: '\1F4AC';
  font-size: 18px;
}

.exchange-message-button-text {
  position: relative;
  z-index: 1;
}

/* Disabled State */
.exchange-message-button:disabled {
  background: var(--color-bg-tertiary);
  cursor: not-allowed;
  opacity: 0.6;
}

.exchange-message-button:disabled:hover {
  transform: none;
  box-shadow: none;
}

/* ============================================
   Gallery Component
   ============================================ */
.exchange-item-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-md);
}

.exchange-gallery-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.exchange-gallery-item:hover {
  transform: scale(1.05);
  z-index: var(--z-base);
}

.exchange-gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.exchange-gallery-item:hover img {
  transform: scale(1.1);
}

/* Gallery Thumbnail Count */
.exchange-gallery-count {
  position: absolute;
  bottom: var(--spacing-xs);
  right: var(--spacing-xs);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

/* ============================================
   Gallery Lightbox
   ============================================ */
.exchange-lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.exchange-lightbox.active {
  opacity: 1;
  visibility: visible;
}

.exchange-lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.exchange-lightbox-image {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
}

/* Lightbox Controls */
.exchange-lightbox-close,
.exchange-lightbox-prev,
.exchange-lightbox-next {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
}

.exchange-lightbox-close:hover,
.exchange-lightbox-prev:hover,
.exchange-lightbox-next:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.exchange-lightbox-close {
  top: var(--spacing-lg);
  right: var(--spacing-lg);
}

.exchange-lightbox-prev {
  left: var(--spacing-lg);
}

.exchange-lightbox-next {
  right: var(--spacing-lg);
}

.exchange-lightbox-counter {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   AJAX Filtering Transitions
   ============================================ */
.exchange-grid-container {
  position: relative;
  min-height: 400px;
}

.exchange-grid-loading {
  opacity: 0.5;
  pointer-events: none;
  position: relative;
}

.exchange-grid-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: exchange-spin 0.8s linear infinite;
}

/* Fade In Animation for Items */
.exchange-item-card {
  animation: exchange-fade-in 0.3s ease-out;
}

@keyframes exchange-fade-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger animation for grid items */
.exchange-item-card:nth-child(1) { animation-delay: 0s; }
.exchange-item-card:nth-child(2) { animation-delay: 0.05s; }
.exchange-item-card:nth-child(3) { animation-delay: 0.1s; }
.exchange-item-card:nth-child(4) { animation-delay: 0.15s; }
.exchange-item-card:nth-child(5) { animation-delay: 0.2s; }
.exchange-item-card:nth-child(n+6) { animation-delay: 0.25s; }

/* ============================================
   Filter Active State
   ============================================ */
.exchange-filter-active {
  position: relative;
  padding-left: calc(var(--spacing-md) + 12px);
}

.exchange-filter-active::before {
  content: '';
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: exchange-pulse-dot 2s ease-in-out infinite;
}

@keyframes exchange-pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: translateY(-50%) scale(1);
  }
  50% {
    opacity: 0.5;
    transform: translateY(-50%) scale(1.2);
  }
}

/* ============================================
   Item Actions Bar
   ============================================ */
.exchange-item-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-bg-tertiary);
  border-top: 1px solid var(--color-border);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.exchange-item-actions-left {
  flex: 1;
  display: flex;
  gap: var(--spacing-sm);
}

.exchange-item-actions-right {
  display: flex;
  gap: var(--spacing-sm);
}

/* Action Buttons */
.exchange-action-button {
  padding: var(--spacing-xs) var(--spacing-md);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.exchange-action-button:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.exchange-action-button.active {
  background: var(--color-primary-alpha);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============================================
   Search Highlight
   ============================================ */
.exchange-search-highlight {
  background: var(--color-warning);
  color: #000;
  padding: 2px 4px;
  border-radius: 2px;
  font-weight: var(--font-weight-medium);
}

/* ============================================
   Item Details View
   ============================================ */
.exchange-item-detail {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.exchange-item-detail-header {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

@media (max-width: 768px) {
  .exchange-item-detail-header {
    grid-template-columns: 1fr;
  }
}

.exchange-item-detail-gallery {
  position: sticky;
  top: var(--spacing-lg);
  align-self: flex-start;
}

.exchange-item-detail-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.exchange-item-detail-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin: 0;
  color: var(--color-text-primary);
}

.exchange-item-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.exchange-item-detail-description {
  line-height: 1.8;
  color: var(--color-text-secondary);
}

/* ============================================
   Responsive Utilities
   ============================================ */
@media (max-width: 767px) {
  .exchange-hide-mobile {
    display: none !important;
  }
}

@media (min-width: 768px) and (max-width: 1199px) {
  .exchange-hide-tablet {
    display: none !important;
  }
}

@media (min-width: 1200px) {
  .exchange-hide-desktop {
    display: none !important;
  }
}

/* ============================================
   No Results Message
   ============================================ */
.exchange-no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--color-border);
}

.exchange-no-results-icon {
  font-size: 4rem;
  opacity: 0.3;
  margin-bottom: var(--spacing-md);
}

.exchange-no-results-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--color-text-primary);
}

.exchange-no-results-message {
  color: var(--color-text-secondary);
  margin: 0 0 var(--spacing-lg) 0;
}

/* ============================================
   Filter Reset Button
   ============================================ */
.exchange-reset-filters {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: transparent;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.exchange-reset-filters:hover {
  border-color: var(--color-error);
  color: var(--color-error);
  background: var(--color-error-bg);
}

.exchange-reset-filters::before {
  content: '\21BA';
  font-size: var(--font-size-lg);
}

/* ============================================
   Item Count Display
   ============================================ */
.exchange-item-count {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.exchange-item-count-number {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

/* ============================================
   Accessibility Enhancements
   ============================================ */
.exchange-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Skip to content link */
.exchange-skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-primary-text);
  padding: var(--spacing-sm) var(--spacing-lg);
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) 0;
  z-index: var(--z-modal);
}

.exchange-skip-link:focus {
  top: 0;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  .exchange-lightbox,
  .exchange-message-button,
  .exchange-item-actions,
  .exchange-filters,
  .exchange-pagination,
  .exchange-action-button {
    display: none !important;
  }

  .exchange-item-card {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .exchange-item-detail-header {
    grid-template-columns: 1fr;
  }

  .exchange-item-detail-gallery {
    position: static;
  }
}

/* ============================================
   Prefers Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  .exchange-item-card {
    animation: none !important;
  }

  .exchange-match-indicator::before {
    animation: none !important;
  }

  .exchange-lightbox {
    transition: none !important;
  }
}