/* === ActivityFeed Component === */
.activity-feed {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-height: 600px;
  overflow-y: auto;
  padding: var(--space-md);
}

.activity-feed-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.activity-feed-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-sm);
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 1;
}

.activity-feed-group-date {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.activity-feed-group-count {
  font-size: calc(var(--space-sm) + var(--space-xs) * 0.75);
  color: var(--text-muted);
  background: var(--card);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.activity-feed-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.activity-feed-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.activity-feed-item:hover {
  background: var(--card-hover);
}

.activity-feed-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--surface);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.activity-feed-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.activity-feed-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.activity-feed-type {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.activity-feed-project-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 11px;
  color: var(--todo);
  background: color-mix(in srgb, var(--todo) 10%, transparent);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.activity-feed-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.activity-feed-task-id {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

.activity-feed-task-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.activity-feed-description {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
}

.activity-feed-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: 2px;
}

.activity-feed-time {
  font-size: 11px;
  color: var(--text-dim);
}

/* Activity Feed States */
.activity-feed-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.activity-feed-skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  width: 100%;
}

.activity-feed-skeleton-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
}

.activity-feed-skeleton-icon {
  width: 32px;
  height: 32px;
  background: var(--border);
  border-radius: var(--radius-md);
  flex-shrink: 0;
  animation: pulse 1.5s ease-in-out infinite;
}

.activity-feed-skeleton-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.activity-feed-skeleton-line {
  height: 12px;
  background: var(--border);
  border-radius: var(--radius-sm);
  animation: pulse 1.5s ease-in-out infinite;
}

.activity-feed-skeleton-line.short {
  width: 60%;
}

.activity-feed-error {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  padding: var(--space-xl);
}

.activity-feed-error-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  color: var(--color-error);
  text-align: center;
}

.activity-feed-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  padding: var(--space-xl);
}

.activity-feed-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  color: var(--text-muted);
  text-align: center;
}

.activity-feed-empty-state p {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  margin: 0;
}

.activity-feed-empty-hint {
  font-size: 13px;
  color: var(--text-dim);
  max-width: 300px;
}