/* 
 * UniMAC Media Card Component
 * YouTube-style consistent media card for all pages
 * 
 * Usage:
 * <div class="unimac-media-card" onclick="viewMedia(ID)">
 *   <div class="unimac-thumbnail">
 *     <img src="..." alt="..." class="unimac-thumbnail-img">
 *     <div class="unimac-duration">10:24</div>
 *     <div class="unimac-play-overlay"><i class="fas fa-play"></i></div>
 *     <div class="unimac-media-badge"><i class="fas fa-video"></i></div>
 *   </div>
 *   <div class="unimac-card-info">
 *     <h3 class="unimac-title">Video Title</h3>
 *     <div class="unimac-creator">Channel Name</div>
 *     <div class="unimac-meta">
 *       <span class="unimac-views">1.2K views</span>
 *       <span class="unimac-time">3 hours ago</span>
 *     </div>
 *   </div>
 * </div>
 */

/* ============================================================================
   MAIN CARD CONTAINER
   ============================================================================ */

.unimac-media-card {
  display: flex;
  flex-direction: column;
  background: transparent;
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.3s ease;
  width: 100%;
  max-width: 360px;
  margin: 0 auto;
}

.unimac-media-card:hover {
  transform: translateY(-4px);
}

/* Grid Layout Responsive */
.unimac-grid {
  display: grid;
  gap: 24px;
  padding: 20px;
}

/* Desktop Grid */
@media (min-width: 1200px) {
  .unimac-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
}

/* Tablet Grid */
@media (min-width: 768px) and (max-width: 1199px) {
  .unimac-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
  }
}

/* Mobile Grid */
@media (max-width: 767px) {
  .unimac-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
    padding: 16px;
  }
}

/* ============================================================================
   THUMBNAIL SECTION
   ============================================================================ */

.unimac-thumbnail {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-secondary, #f1f3f4);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 12px;
}

.unimac-thumbnail-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
  background: var(--bg-secondary, #f1f3f4);
}

/* Hover Video Preview */
.unimac-hover-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 2;
  border-radius: 12px;
  transform: scale(1.02);
  filter: brightness(0.95);
}

.unimac-media-card:hover .unimac-hover-video.playing {
  opacity: 1;
  transform: scale(1);
  filter: brightness(1);
  transition: opacity 0.4s ease, transform 0.4s ease, filter 0.4s ease;
}

.unimac-media-card:hover .unimac-thumbnail-img {
  transform: scale(1.05);
}

/* Placeholder for missing thumbnails */
.unimac-thumbnail-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-secondary, #f1f3f4), var(--bg-tertiary, #e8eaed));
  color: var(--text-muted, #5f6368);
  font-size: 2.5rem;
}

/* ============================================================================
   OVERLAY ELEMENTS
   ============================================================================ */

/* Play Overlay */
.unimac-play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  background: rgba(0, 0, 0, 0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  opacity: 0;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
}

.unimac-media-card:hover .unimac-play-overlay {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.1);
}

/* Hide play overlay when video is previewing */
.unimac-media-card.video-previewing .unimac-play-overlay {
  opacity: 0.3;
  transition: opacity 0.5s ease;
}

/* Show preview indicator when video is playing */
.unimac-media-card.video-previewing::after {
  content: 'Preview';
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 500;
  z-index: 3;
  opacity: 0;
  animation: fadeInPreview 0.3s ease 0.5s forwards;
}

@keyframes fadeInPreview {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Duration Badge */
.unimac-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  font-family: 'Roboto Mono', monospace;
  letter-spacing: 0.5px;
}

/* Media Type Badge */
.unimac-media-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 4px;
  backdrop-filter: blur(4px);
}

.unimac-media-badge.video {
  background: rgba(255, 0, 0, 0.9);
}

.unimac-media-badge.image {
  background: rgba(76, 175, 80, 0.9);
}

.unimac-media-badge.audio {
  background: rgba(156, 39, 176, 0.9);
}

.unimac-media-badge.document {
  background: rgba(255, 152, 0, 0.9);
}

/* ============================================================================
   CARD INFO SECTION
   ============================================================================ */

.unimac-card-info {
  padding: 0 4px;
  flex: 1;
}

.unimac-title {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-primary, #030303);
  margin: 0 0 6px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  max-height: 2.8em;
}

.unimac-creator {
  font-size: 0.875rem;
  color: var(--text-secondary, #606060);
  margin: 0 0 4px 0;
  font-weight: 400;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.unimac-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary, #606060);
  flex-wrap: wrap;
}

.unimac-views,
.unimac-time,
.unimac-likes {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.unimac-meta .fas {
  font-size: 0.75rem;
  opacity: 0.7;
}

/* Separator dot between meta items */
.unimac-meta > span:not(:last-child)::after {
  content: "•";
  margin-left: 8px;
  opacity: 0.6;
}

/* ============================================================================
   CREATOR SECTION WITH AVATAR
   ============================================================================ */

.unimac-creator-section {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
}

/* Creator link styling */
.unimac-creator-link {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
  text-decoration: none;
  color: inherit;
  border-radius: 8px;
  padding: 4px;
  transition: all 0.2s ease;
}

.unimac-creator-link:hover {
  background-color: var(--hover-bg, rgba(0, 0, 0, 0.05));
  transform: translateX(2px);
  text-decoration: none;
  color: inherit;
}

.unimac-creator-link:focus {
  outline: 2px solid var(--primary-color, #ff0000);
  outline-offset: 2px;
}

.unimac-creator-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-color, #e0e0e0);
  background: var(--bg-secondary, #f1f3f4);
}

.unimac-creator-avatar-placeholder {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color, #ff0000), var(--primary-hover, #cc0000));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

/* ============================================================================
   DEPARTMENT TAG
   ============================================================================ */

.unimac-department-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--dept-bg, var(--bg-secondary, #f8f9fa));
  color: var(--dept-color, var(--text-secondary, #606060));
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
  margin: 6px 0 4px 0;
  border: 1px solid var(--dept-border, var(--border-color, #e0e0e0));
  transition: all 0.2s ease;
}

.unimac-department-tag:hover {
  background: var(--dept-color, var(--text-secondary, #606060));
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px var(--dept-bg, rgba(0, 0, 0, 0.1));
}

.unimac-department-tag i {
  font-size: 0.7rem;
  opacity: 0.8;
}

/* Legacy department tag color variants - kept for backwards compatibility */
.unimac-department-tag.business {
  background: rgba(76, 175, 80, 0.1);
  color: #4caf50;
  border-color: rgba(76, 175, 80, 0.3);
}

.unimac-department-tag.technology {
  background: rgba(33, 150, 243, 0.1);
  color: #2196f3;
  border-color: rgba(33, 150, 243, 0.3);
}

.unimac-department-tag.design {
  background: rgba(156, 39, 176, 0.1);
  color: #9c27b0;
  border-color: rgba(156, 39, 176, 0.3);
}

.unimac-department-tag.arts {
  background: rgba(255, 152, 0, 0.1);
  color: #ff9800;
  border-color: rgba(255, 152, 0, 0.3);
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

/* Large screens - 4 columns */
@media (min-width: 1400px) {
  .unimac-grid {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
  }
}

/* Desktop - 3 columns */
@media (min-width: 1024px) and (max-width: 1399px) {
  .unimac-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }
}

/* Tablet Portrait - 2 columns */
@media (min-width: 576px) and (max-width: 767px) {
  .unimac-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .unimac-media-card {
    max-width: none;
  }
}

/* Mobile - 1 column */
@media (max-width: 575px) {
  .unimac-grid {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 12px;
  }
  
  .unimac-media-card {
    max-width: none;
  }
  
  .unimac-title {
    font-size: 0.95rem;
  }
  
  .unimac-creator,
  .unimac-meta {
    font-size: 0.8rem;
  }
}

/* ============================================================================
   LIST VIEW VARIANT
   ============================================================================ */

.unimac-grid.list-view {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.unimac-grid.list-view .unimac-media-card {
  display: flex;
  flex-direction: row;
  max-width: none;
  background: var(--bg-primary, white);
  border: 1px solid var(--border-color, #e0e0e0);
  border-radius: 8px;
  padding: 12px;
  transition: all 0.2s ease;
}

.unimac-grid.list-view .unimac-media-card:hover {
  transform: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.unimac-grid.list-view .unimac-thumbnail {
  width: 160px;
  min-width: 160px;
  margin-bottom: 0;
  margin-right: 12px;
  border-radius: 6px;
}

.unimac-grid.list-view .unimac-card-info {
  flex: 1;
  padding: 0;
}

@media (max-width: 576px) {
  .unimac-grid.list-view .unimac-thumbnail {
    width: 120px;
    min-width: 120px;
  }
  
  .unimac-grid.list-view .unimac-media-card {
    padding: 8px;
  }
}

/* ============================================================================
   DARK THEME SUPPORT
   ============================================================================ */

[data-theme="dark"] .unimac-media-card,
.dark-theme .unimac-media-card {
  background: transparent;
}

[data-theme="dark"] .unimac-title,
.dark-theme .unimac-title {
  color: var(--text-primary-dark, #ffffff);
}

[data-theme="dark"] .unimac-creator,
[data-theme="dark"] .unimac-meta,
.dark-theme .unimac-creator,
.dark-theme .unimac-meta {
  color: var(--text-secondary-dark, #aaaaaa);
}

[data-theme="dark"] .unimac-thumbnail-placeholder,
.dark-theme .unimac-thumbnail-placeholder {
  background: linear-gradient(135deg, var(--bg-secondary-dark, #2a2a2a), var(--bg-tertiary-dark, #3a3a3a));
  color: var(--text-muted-dark, #888888);
}

[data-theme="dark"] .unimac-grid.list-view .unimac-media-card,
.dark-theme .unimac-grid.list-view .unimac-media-card {
  background: var(--bg-primary-dark, #1a1a1a);
  border-color: var(--border-color-dark, #333333);
}

[data-theme="dark"] .unimac-creator-avatar,
.dark-theme .unimac-creator-avatar {
  border-color: var(--border-color-dark, #333333);
}

[data-theme="dark"] .unimac-department-tag,
.dark-theme .unimac-department-tag {
  background: var(--bg-secondary-dark, #2a2a2a);
  color: var(--text-secondary-dark, #aaaaaa);
  border-color: var(--border-color-dark, #333333);
}

/* ============================================================================
   LOADING STATES
   ============================================================================ */

.unimac-media-card.loading {
  pointer-events: none;
}

.unimac-media-card.loading .unimac-thumbnail {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.unimac-media-card.loading .unimac-title,
.unimac-media-card.loading .unimac-creator,
.unimac-media-card.loading .unimac-meta {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  color: transparent;
  border-radius: 4px;
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.unimac-media-card.featured {
  border: 2px solid var(--primary-color, #ff0000);
  box-shadow: 0 4px 12px rgba(255, 0, 0, 0.1);
}

.unimac-media-card.trending::before {
  content: "🔥";
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 1.2rem;
  z-index: 2;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .unimac-media-card,
  .unimac-thumbnail-img,
  .unimac-play-overlay {
    transition: none;
  }
  
  .unimac-media-card:hover .unimac-thumbnail-img {
    transform: none;
  }
  
  .unimac-media-card:hover {
    transform: none;
  }
}

/* Focus states for keyboard navigation */
.unimac-media-card:focus {
  outline: 2px solid var(--primary-color, #ff0000);
  outline-offset: 2px;
}

.unimac-media-card:focus-visible {
  outline: 2px solid var(--primary-color, #ff0000);
  outline-offset: 2px;
}

/* Dark Theme Support */
body.dark .unimac-creator-link:hover,
[data-theme="dark"] .unimac-creator-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

body.dark .unimac-creator-avatar,
[data-theme="dark"] .unimac-creator-avatar {
  border-color: rgba(255, 255, 255, 0.2);
}

body.dark .unimac-department-tag,
[data-theme="dark"] .unimac-department-tag {
  background: rgba(255, 255, 255, 0.1);
  color: #e0e0e0;
  border: 1px solid rgba(255, 255, 255, 0.2);
}