/* ==========================================================================
   Component: Activity
   .activity-row, .activity__action (colored by type), .activity__price.
   Real-time activity feed panel.
   ========================================================================== */

/* ---------------------------------------------------------------------------
   Activity Container
   --------------------------------------------------------------------------- */
.activity {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.activity__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-muted);
  flex-shrink: 0;
}

.activity__title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
}

.activity__list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
}

/* ---------------------------------------------------------------------------
   Activity Row
   --------------------------------------------------------------------------- */
.activity-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--border-muted);
  transition: background-color var(--transition-fast);
  min-height: 44px;
  font-size: var(--text-sm);
}

.activity-row:hover {
  background-color: var(--bg-elevated);
}

.activity-row:last-child {
  border-bottom: none;
}

/* New row animation */
.activity-row.is-new {
  animation: activity-enter var(--duration-slow) var(--ease-out);
}

@keyframes activity-enter {
  from {
    opacity: 0;
    transform: translateX(-8px);
    background-color: var(--accent-subtle);
  }
  to {
    opacity: 1;
    transform: translateX(0);
    background-color: transparent;
  }
}

/* ---------------------------------------------------------------------------
   Action Type Badge
   --------------------------------------------------------------------------- */
.activity__action {
  flex-shrink: 0;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  min-width: 48px;
  text-align: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
}

/* Buy / Purchase */
.activity__action--buy,
.activity__action--purchase {
  color: var(--color-success);
  background-color: var(--color-success-bg);
}

/* Sell / List */
.activity__action--sell,
.activity__action--list {
  color: var(--color-sell);
  background-color: var(--color-sell-bg);
}

/* Delist / Cancel */
.activity__action--delist,
.activity__action--cancel {
  color: var(--color-error);
  background-color: var(--color-error-bg);
}

/* Bid / Offer */
.activity__action--bid,
.activity__action--offer {
  color: var(--color-info);
  background-color: var(--color-info-bg);
}

/* Transfer */
.activity__action--transfer {
  color: var(--color-warning);
  background-color: var(--color-warning-bg);
}

/* Mint */
.activity__action--mint {
  color: var(--accent);
  background-color: var(--accent-subtle);
}

/* ---------------------------------------------------------------------------
   Activity Info (item name, details)
   --------------------------------------------------------------------------- */
.activity__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

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

.activity__detail {
  font-size: var(--text-xs);
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------------------------------------------------------------------------
   Price
   --------------------------------------------------------------------------- */
.activity__price {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
}

.activity__price-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  white-space: nowrap;
}

.activity__price-usd {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  white-space: nowrap;
}

/* ---------------------------------------------------------------------------
   Timestamp
   --------------------------------------------------------------------------- */
.activity__time {
  flex-shrink: 0;
  font-size: var(--text-xs);
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 40px;
  text-align: right;
}

/* ---------------------------------------------------------------------------
   Activity Avatar (small)
   --------------------------------------------------------------------------- */
.activity__avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background-color: var(--bg-elevated);
}

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

/* ---------------------------------------------------------------------------
   Activity Filters
   --------------------------------------------------------------------------- */
.activity__filters {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--border-muted);
  overflow-x: auto;
  flex-shrink: 0;
}

.activity__filter {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.activity__filter:hover {
  color: var(--text-secondary);
  background-color: var(--bg-elevated);
}

.activity__filter.is-active {
  color: var(--accent);
  background-color: var(--accent-subtle);
  border-color: var(--accent-muted);
}

/* ---------------------------------------------------------------------------
   Empty state
   --------------------------------------------------------------------------- */
.activity__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  color: var(--text-muted);
  text-align: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

/* ---------------------------------------------------------------------------
   Reduced motion
   --------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .activity-row,
  .activity-row.is-new {
    transition: none;
    animation: none;
  }
}