/**
 * TubeRaker Trends Module Styles
 * Thumbnail Time Machine UI (PATENT-46)
 */

/* ===== Trends Page ===== */
.trends-page {
  max-width: 80rem;
  margin: 0 auto;
}

/* Hero Section */
.trends-hero {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-md) var(--spacing-2xl);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--spacing-2xl);
}

.hero-content {
  max-width: 50rem;
  margin: 0 auto;
}

.hero-badge {
  margin-bottom: var(--spacing-lg);
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-tight);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
}

/* Search Form */
.search-form {
  margin-top: var(--spacing-xl);
}

.form-group-inline {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.form-input-wrapper {
  flex: 1;
  position: relative;
}

.form-input-wrapper .form-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}

.form-input-wrapper .form-input {
  padding-left: calc(var(--spacing-md) * 2.5);
}

.input-validation {
  position: absolute;
  top: 100%;
  left: 0;
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
}

.validation-success {
  color: var(--color-success);
  background: var(--color-success-bg);
}

.validation-error {
  color: var(--color-error);
  background: var(--color-error-bg);
}

.form-hint {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  text-align: center;
}

.btn-spinner {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Stats Overview */
.trends-stats {
  margin-bottom: var(--spacing-2xl);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12.5rem, 1fr));
  gap: var(--spacing-lg);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-0.125rem);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
}

.stat-icon-primary {
  background: var(--color-brand-primary);
  color: white;
}

.stat-icon-success {
  background: var(--color-success);
  color: white;
}

.stat-icon-warning {
  background: var(--color-warning);
  color: white;
}

.stat-icon-info {
  background: var(--color-info);
  color: white;
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Two Column Layout */
.trends-columns {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

@media (max-width: 1024px) {
  .trends-columns {
    grid-template-columns: 1fr;
  }
}

/* Section Header */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  gap: var(--spacing-md);
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.section-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Changes Feed */
.changes-feed {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.change-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
}

.change-card:hover {
  border-color: var(--color-brand-primary);
  box-shadow: var(--shadow-md);
}

.change-thumbnail {
  flex-shrink: 0;
  width: 10rem;
  height: 5.625rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-tertiary);
}

.change-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.change-content {
  flex: 1;
  min-width: 0;
}

.change-title {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.change-channel {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.change-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.change-time {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.change-velocity {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.velocity-up {
  color: var(--color-success);
}

.velocity-down {
  color: var(--color-error);
}

/* Tracked Channels */
.tracked-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.tracked-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.tracked-item:hover {
  border-color: var(--color-brand-primary);
}

.tracked-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
}

.tracked-info {
  flex: 1;
  min-width: 0;
}

.tracked-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tracked-changes {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.tracked-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.tracked-btn {
  padding: var(--spacing-xs);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-tertiary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.tracked-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.tracked-btn.danger:hover {
  color: var(--color-error);
}

/* Upgrade Notice */
.upgrade-notice {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-brand-primary-bg) 0%, var(--bg-secondary) 100%);
  border: 1px solid var(--color-brand-primary);
  border-radius: var(--radius-lg);
}

.upgrade-icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-primary);
  color: white;
  border-radius: 50%;
}

.upgrade-content {
  flex: 1;
}

.upgrade-content strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.upgrade-content p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin: 0;
}

/* Alerts Section */
.trends-alerts {
  margin-bottom: var(--spacing-2xl);
}

.alerts-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.alert-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
}

.alert-item:hover {
  border-color: var(--color-brand-primary);
}

.alert-item.unread {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
}

.alert-thumbnail {
  width: 5rem;
  height: 2.8125rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-tertiary);
}

.alert-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.alert-content {
  flex: 1;
  min-width: 0;
}

.alert-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.alert-time {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

/* ===== History Page ===== */
.history-page {
  max-width: 62.5rem;
  margin: 0 auto;
}

.page-nav {
  margin-bottom: var(--spacing-xl);
}

.nav-back {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.nav-back:hover {
  color: var(--text-primary);
}

/* Video Header */
.history-header {
  margin-bottom: var(--spacing-2xl);
}

.video-preview {
  display: flex;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
}

.video-thumbnail {
  flex-shrink: 0;
  position: relative;
  width: 20rem;
  height: 11.25rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-tertiary);
}

.video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumbnail-overlay {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
}

.video-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.video-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
}

.video-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.channel-link {
  color: var(--color-brand-primary);
  text-decoration: none;
}

.channel-link:hover {
  text-decoration: underline;
}

.meta-separator {
  width: 0.25rem;
  height: 0.25rem;
  background: var(--text-tertiary);
  border-radius: 50%;
}

.video-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: auto;
}

@media (max-width: 768px) {
  .video-preview {
    flex-direction: column;
  }

  .video-thumbnail {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
  }
}

/* History Stats */
.history-stats {
  margin-bottom: var(--spacing-2xl);
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
}

@media (max-width: 768px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-item {
  text-align: center;
}

.stat-item .stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.stat-item .stat-label {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Timeline */
.history-timeline {
  margin-bottom: var(--spacing-2xl);
}

.tier-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.tier-badge {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-weight: 500;
  text-transform: uppercase;
  font-size: var(--font-size-xs);
}

.tier-badge.pro {
  background: var(--color-brand-primary);
  color: white;
}

.timeline {
  position: relative;
  padding-left: var(--spacing-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0.5rem;
  top: 0;
  bottom: 0;
  width: 0.125rem;
  background: var(--border-primary);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-xl);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--spacing-xl) + 0.25rem);
  width: 0.75rem;
  height: 0.75rem;
  background: var(--bg-elevated);
  border: 0.125rem solid var(--border-primary);
  border-radius: 50%;
}

.timeline-item.change .timeline-marker {
  background: var(--color-brand-primary);
  border-color: var(--color-brand-primary);
}

.timeline-content {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
}

.timeline-content:hover {
  border-color: var(--color-brand-primary);
  box-shadow: var(--shadow-md);
}

.timeline-thumbnail {
  flex-shrink: 0;
  width: 10rem;
  height: 5.625rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-tertiary);
}

.timeline-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.timeline-info {
  flex: 1;
}

.timeline-date {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.timeline-label {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.timeline-metrics {
  display: flex;
  gap: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.timeline-metric {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* Upgrade CTA */
.upgrade-cta {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-brand-primary-bg) 0%, var(--bg-secondary) 100%);
  border: 1px solid var(--color-brand-primary);
  border-radius: var(--radius-xl);
  text-align: center;
}

.upgrade-cta .upgrade-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.upgrade-cta .upgrade-icon {
  width: 4rem;
  height: 4rem;
  background: var(--color-brand-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.upgrade-cta .upgrade-text h3 {
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.upgrade-cta .upgrade-text p {
  color: var(--text-secondary);
  max-width: 25rem;
}

/* Comparison Modal */
.comparison-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.comparison-before,
.comparison-after {
  flex: 1;
  text-align: center;
}

.comparison-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-before img,
.comparison-after img {
  width: 100%;
  max-width: 20rem;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
}

.comparison-date {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  margin-top: var(--spacing-sm);
}

.comparison-arrow {
  flex-shrink: 0;
  color: var(--text-tertiary);
}

.comparison-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-primary);
}

.comparison-stat {
  display: flex;
  gap: var(--spacing-sm);
}

.comparison-stat .stat-label {
  color: var(--text-tertiary);
}

.comparison-stat .stat-value {
  font-weight: 600;
  color: var(--text-primary);
}

/* ===== Channel Page ===== */
.channel-page {
  max-width: 75rem;
  margin: 0 auto;
}

.channel-header {
  margin-bottom: var(--spacing-2xl);
}

.channel-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
}

.channel-avatar {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  overflow: hidden;
}

.channel-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.channel-details {
  flex: 1;
}

.channel-name {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.channel-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.channel-actions {
  display: flex;
  gap: var(--spacing-sm);
}

@media (max-width: 768px) {
  .channel-info {
    flex-direction: column;
    text-align: center;
  }

  .channel-actions {
    width: 100%;
    justify-content: center;
  }
}

/* Channel Filters */
.channel-filters {
  margin-bottom: var(--spacing-xl);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.filter-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.filter-buttons {
  display: flex;
  gap: var(--spacing-xs);
}

.filter-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-brand-primary);
  color: var(--text-primary);
}

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

/* Changes Grid */
.changes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18.75rem, 1fr));
  gap: var(--spacing-lg);
}

.change-grid-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-base);
}

.change-grid-card:hover {
  border-color: var(--color-brand-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-0.125rem);
}

.change-grid-thumbnail {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--bg-tertiary);
}

.change-grid-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.change-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-warning);
  color: white;
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.change-grid-content {
  padding: var(--spacing-md);
}

.change-grid-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.change-grid-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

/* Empty States */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl) var(--spacing-xl);
  text-align: center;
}

.empty-state.compact {
  padding: var(--spacing-xl);
}

.empty-state-icon {
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-lg);
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.empty-state-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  max-width: 25rem;
}

/* Loading State */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3xl);
  gap: var(--spacing-md);
  color: var(--text-tertiary);
}

.loading-state.compact {
  padding: var(--spacing-xl);
}

/* Responsive */
@media (max-width: 640px) {
  .form-group-inline {
    flex-direction: column;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .change-card {
    flex-direction: column;
  }

  .change-thumbnail {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
  }
}