/**
 * TubeRaker Trends — Thumbnail Time Machine
 * Page styles for index.html, channel.html, history.html.
 *
 * Single class vocabulary shared across all three pages. Loaded LAST so its
 * rules intentionally override the shared modal defaults for the trends modals.
 * All sizes in rem; colours only via variables.css design tokens.
 */

/* ===================================================================== */
/* Shell + breadcrumb                                                    */
/* ===================================================================== */
.trends-shell {
  /* White for text/icons sitting on brand-colored fills; stable in both themes
     (unlike --text-inverse, which flips dark in dark mode). Local fallback until
     a shared --color-on-brand token lands — see shared_requests. */
  --trends-on-brand: #ffffff;
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding: var(--spacing-lg) var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

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

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  min-width: 0;
}

.breadcrumb__item::after {
  content: "/";
  color: var(--text-tertiary);
  margin-left: var(--spacing-xs);
}

.breadcrumb__item:last-child::after {
  content: none;
}

.breadcrumb__link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.breadcrumb__link:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
  border-radius: var(--radius-sm);
}

.breadcrumb__current {
  display: inline-flex;
  align-items: center;
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 60vw;
}

.text-muted {
  color: var(--text-tertiary);
}

/* ===================================================================== */
/* Section headers (card headers with an action on the right)           */
/* ===================================================================== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 0.0625rem solid var(--border-primary);
}

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

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

/* ===================================================================== */
/* Hero (index)                                                          */
/* ===================================================================== */
.trends-hero {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-2xl);
}

.trends-hero__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  line-height: var(--line-height-tight);
  margin: 0 0 var(--spacing-sm);
}

.trends-hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  max-width: 44rem;
  margin: 0 auto var(--spacing-xl);
}

/* Search bar */
.search-form {
  max-width: 44rem;
  margin: 0 auto;
}

.search-bar {
  display: flex;
  align-items: stretch;
  gap: var(--spacing-md);
}

.search-field {
  position: relative;
  flex: 1;
  min-width: 0;
}

.search-field__icon {
  position: absolute;
  left: var(--spacing-md);
  top: 1.375rem;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}

.search-field .form-input {
  min-height: 2.75rem;
  padding-left: 2.75rem;
}

.search-bar .btn {
  min-height: 2.75rem;
}

.input-validation {
  min-height: 1.25rem;
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
  text-align: left;
}

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

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

.form-hint {
  margin-top: var(--spacing-sm);
  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);
}

@media (max-width: 40rem) {
  .search-bar {
    flex-direction: column;
  }

  .search-bar .btn {
    width: 100%;
  }

  .trends-hero__title {
    font-size: var(--font-size-2xl);
  }
}

/* ===================================================================== */
/* Stat tiles                                                            */
/* ===================================================================== */
.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: var(--spacing-lg);
}

.stat-tile {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-elevated);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-xl);
  text-align: left;
  color: inherit;
  text-decoration: none;
}

/* interactive variant (e.g. Unread Alerts jump link / button) */
.stat-tile--action {
  cursor: pointer;
  width: 100%;
  font: inherit;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.stat-tile--action:hover {
  border-color: var(--color-brand-primary);
  box-shadow: var(--shadow-md);
}

.stat-tile--action:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

.stat-tile__icon {
  flex-shrink: 0;
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  /* Icons always sit on a brand-colored fill (set by the modifiers below), so
     white reads correctly in both themes. */
  color: var(--trends-on-brand);
  font-size: var(--font-size-lg);
}

.stat-tile__icon--primary { background: var(--color-brand-primary); }
.stat-tile__icon--success { background: var(--color-success); }
.stat-tile__icon--warning { background: var(--color-warning); }
.stat-tile__icon--info    { background: var(--color-info); }

.stat-tile__body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  min-width: 0;
}

.stat-tile__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  line-height: 1.1;
}

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

@media (max-width: 40rem) {
  .stat-tiles {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 22.5rem) {
  .stat-tiles {
    grid-template-columns: 1fr;
  }
}

/* ===================================================================== */
/* Two-column work area (index)                                          */
/* ===================================================================== */
.trends-columns {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

@media (max-width: 64rem) {
  .trends-columns {
    grid-template-columns: 1fr;
  }
}

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

.change-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  min-height: 2.75rem;
  background: var(--bg-elevated);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-align: left;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

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

.change-card:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

.thumb-16x9 {
  flex-shrink: 0;
  width: 10rem;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-tertiary);
}

.thumb-16x9 img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

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

.change-card__channel {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

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

@media (max-width: 40rem) {
  .change-card {
    flex-direction: column;
  }

  .change-card .thumb-16x9 {
    width: 100%;
  }
}

/* ===================================================================== */
/* Tracked channels (index)                                              */
/* ===================================================================== */
.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);
  min-height: 2.75rem;
  background: var(--bg-elevated);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base);
}

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

.tracked-avatar {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  overflow: hidden;
}

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

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

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

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

.tracked-actions {
  display: flex;
  gap: var(--spacing-xs);
  flex-shrink: 0;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: transparent;
  border: 0.0625rem solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

.icon-btn:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

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

/* ===================================================================== */
/* Upgrade panel (tracked gate + history CTA)                            */
/* ===================================================================== */
.upgrade-panel {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-info-bg) 0%, var(--bg-secondary) 100%);
  border: 0.0625rem solid var(--color-brand-primary);
  border-radius: var(--radius-lg);
}

.upgrade-panel__icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-primary);
  color: var(--trends-on-brand);
  border-radius: var(--radius-full);
  font-size: var(--font-size-lg);
}

.upgrade-panel__body {
  flex: 1;
  min-width: 0;
}

.upgrade-panel__title {
  display: block;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

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

.upgrade-panel--cta {
  flex-direction: column;
  text-align: center;
  padding: var(--spacing-xl);
  margin-top: var(--spacing-lg);
}

.upgrade-panel--cta .upgrade-panel__icon {
  width: 4rem;
  height: 4rem;
  font-size: var(--font-size-2xl);
}

@media (max-width: 40rem) {
  .upgrade-panel {
    flex-direction: column;
    text-align: center;
  }
}

/* ===================================================================== */
/* Alerts (index)                                                        */
/* ===================================================================== */
.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);
  min-height: 2.75rem;
  width: 100%;
  background: var(--bg-elevated);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: border-color var(--transition-base);
}

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

.alert-item:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

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

.alert-thumb {
  flex-shrink: 0;
  width: 5rem;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-tertiary);
}

.alert-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

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

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

/* ===================================================================== */
/* Video identity (history)                                              */
/* ===================================================================== */
.video-identity {
  display: flex;
  gap: var(--spacing-xl);
}

.video-identity__media {
  position: relative;
  flex-shrink: 0;
  width: 100%;
  max-width: 20rem;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-tertiary);
}

.video-identity__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-badge {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
}

.video-identity__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.video-identity__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  line-height: var(--line-height-tight);
  margin: 0 0 var(--spacing-sm);
  overflow-wrap: anywhere;
}

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

.video-identity__meta code {
  font-family: var(--font-family-mono);
  color: var(--text-tertiary);
}

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

@media (max-width: 48rem) {
  .video-identity {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .video-identity__media {
    max-width: 100%;
  }

  .video-identity__title {
    font-size: var(--font-size-2xl);
  }
}

/* 4-up stat tiles collapse to 2-up on history / summary rows */
@media (max-width: 48rem) {
  .stat-tiles--summary {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.tier-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-transform: capitalize;
}

.tier-badge.pro,
.tier-badge.premium {
  background: var(--color-brand-primary);
  color: var(--trends-on-brand);
}

.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);
  top: var(--spacing-md);
  width: 0.75rem;
  height: 0.75rem;
  background: var(--bg-elevated);
  border: 0.125rem solid var(--border-primary);
  border-radius: var(--radius-full);
}

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

.timeline-content {
  display: flex;
  gap: var(--spacing-md);
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-elevated);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-lg);
  text-align: left;
  color: inherit;
  font: inherit;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

button.timeline-content {
  cursor: pointer;
}

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

button.timeline-content:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

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

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

.timeline-label {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  margin-bottom: 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: var(--font-weight-medium);
}

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

/* ===================================================================== */
/* Channel identity + filter toolbar + grid (channel)                    */
/* ===================================================================== */
.channel-identity {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.channel-avatar {
  flex-shrink: 0;
  width: 5rem;
  height: 5rem;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: var(--font-size-2xl);
  overflow: hidden;
}

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

.channel-details {
  flex: 1;
  min-width: 0;
}

.channel-details h1 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin: 0 0 var(--spacing-xs);
  overflow-wrap: anywhere;
}

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

.channel-meta code {
  font-family: var(--font-family-mono);
  color: var(--text-tertiary);
}

.channel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

@media (max-width: 48rem) {
  .channel-identity {
    flex-direction: column;
    text-align: center;
  }

  .channel-actions {
    justify-content: center;
  }
}

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

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

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

.filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0 var(--spacing-md);
  background: var(--bg-elevated);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

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

.filter-chip:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

.filter-chip.is-active,
.filter-chip[aria-pressed="true"] {
  background: var(--color-brand-primary);
  border-color: var(--color-brand-primary);
  color: var(--trends-on-brand);
}

.changes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: var(--spacing-lg);
}

.change-grid-card {
  display: block;
  background: var(--bg-elevated);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

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

.change-grid-card:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

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

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

.change-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
}

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

.change-grid-card__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

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

@media (max-width: 22.5rem) {
  .changes-grid {
    grid-template-columns: 1fr;
  }
}

/* ===================================================================== */
/* States: loading / skeleton / empty / error                           */
/* ===================================================================== */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-2xl);
  color: var(--text-tertiary);
}

.empty-state,
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
}

.empty-state__icon,
.error-state__icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-sm);
}

.empty-state__icon {
  color: var(--text-tertiary);
}

.error-state__icon {
  color: var(--color-error);
}

.empty-state__title,
.error-state__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.empty-state__desc,
.error-state__desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  max-width: 28rem;
}

.empty-state__action,
.error-state__action {
  margin-top: var(--spacing-md);
}

/* Skeleton shimmer */
.skeleton {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

@media (prefers-reduced-motion: no-preference) {
  .skeleton {
    animation: trends-shimmer 1.4s ease-in-out infinite;
  }
}

@keyframes trends-shimmer {
  0%   { background-color: var(--bg-tertiary); }
  50%  { background-color: var(--bg-hover); }
  100% { background-color: var(--bg-tertiary); }
}

.skeleton-row {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-lg);
}

.skeleton-thumb {
  flex-shrink: 0;
  width: 10rem;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
}

.skeleton-lines {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  min-width: 0;
}

.skeleton-line {
  height: 0.75rem;
  border-radius: var(--radius-sm);
}

.skeleton-line--title { width: 70%; height: 1rem; }
.skeleton-line--sub   { width: 45%; }
.skeleton-line--meta  { width: 30%; }

.skeleton-card {
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skeleton-card__thumb {
  aspect-ratio: 16 / 9;
}

.skeleton-card__body {
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* ===================================================================== */
/* Modals (canonical trends pattern — overrides shared .modal on purpose)*/
/* ===================================================================== */
/* Full-screen overlay. Explicitly neutralises the shared .modal "box" rules
   (background/border/shadow/max-width/transform) because this .modal is the
   overlay, not the dialog box. */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: row;
  padding: var(--spacing-md);
  margin: 0;
  width: auto;
  max-width: none;
  max-height: none;
  background: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
  transform: none;
  z-index: var(--z-modal);
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: var(--bg-modal-overlay);
}

.modal-dialog {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 32rem;
  max-height: 85vh;
  background: var(--bg-elevated);
  border: 0.0625rem solid var(--border-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
}

.modal-dialog--lg {
  max-width: 48rem;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-bottom: 0.0625rem solid var(--border-primary);
  flex-shrink: 0;
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-close:focus-visible {
  outline: 0.125rem solid var(--border-focus);
  outline-offset: 0.125rem;
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  flex: 1;
  color: var(--text-secondary);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-top: 0.0625rem solid var(--border-primary);
  flex-shrink: 0;
}

/* Comparison layout inside the compare modal */
.comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.comparison__side {
  text-align: center;
  min-width: 0;
}

.comparison__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.comparison__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 0.0625rem solid var(--border-primary);
  background: var(--bg-tertiary);
}

.comparison__date {
  display: block;
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.comparison__arrow {
  color: var(--text-tertiary);
  font-size: var(--font-size-xl);
}

.comparison__arrow .fa-arrow-down { display: none; }

.comparison__stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 0.0625rem solid var(--border-primary);
}

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

.comparison__stat strong {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
}

@media (max-width: 40rem) {
  .comparison {
    grid-template-columns: 1fr;
  }

  .comparison__arrow {
    transform: rotate(90deg);
  }

  .comparison__arrow .fa-arrow-right { display: none; }
  .comparison__arrow .fa-arrow-down { display: inline-block; }
}

@media (max-width: 47.9375rem) {
  .modal {
    padding: 0;
    align-items: flex-end;
  }

  .modal-dialog {
    max-width: 100%;
    max-height: 90vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  }

  .modal-footer {
    flex-direction: column-reverse;
  }

  .modal-footer .btn {
    width: 100%;
  }
}

/* Body scroll lock while a trends modal is open */
body.modal-open {
  overflow: hidden;
}

/* Reduced motion: disable hover lift transforms */
@media (prefers-reduced-motion: no-preference) {
  .stat-tile--action:hover,
  .change-grid-card:hover {
    transform: translateY(-0.125rem);
  }

  .btn:active {
    transform: scale(0.98);
  }
}