/* ===== Chat Nav Bar ===== */
.chat-nav-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(10px);
  flex-shrink: 0;
  z-index: 10;
}

.chat-nav-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.chat-nav-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.chat-nav-btn.active {
  color: var(--primary);
  background: rgba(6, 182, 212, 0.1);
}

.chat-nav-title {
  flex: 1;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.chat-nav-title:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.chat-nav-title.editing {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  outline: 1px solid var(--primary);
  cursor: text;
}

.chat-nav-right {
  display: flex;
  align-items: center;
  gap: 2px;
}

/* ===== History Panel ===== */
.chat-history-panel {
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: var(--bg-dark);
}

.chat-history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.chat-history-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.chat-history-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
}

.chat-history-list::-webkit-scrollbar {
  width: 5px;
}

.chat-history-list::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

/* History Items */
.chat-history-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.12s ease;
  position: relative;
}

.chat-history-item:hover {
  background: rgba(30, 41, 59, 0.6);
}

.chat-history-item.active {
  background: rgba(6, 182, 212, 0.08);
  border-left: 3px solid var(--primary);
  padding-left: 9px;
}

.chat-history-item-content {
  flex: 1;
  min-width: 0;
}

.chat-history-item-title {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-history-item-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.chat-history-item-delete {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  opacity: 0;
  transition: all 0.15s ease;
  flex-shrink: 0;
  display: flex;
}

.chat-history-item:hover .chat-history-item-delete {
  opacity: 1;
}

.chat-history-item-delete:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* Empty and Load More */
.chat-history-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  text-align: center;
}

.chat-history-empty p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0 0 4px 0;
}

.chat-history-empty span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.chat-history-load-more {
  display: block;
  width: 100%;
  padding: 10px;
  background: transparent;
  border: 1px dashed var(--border-color);
  border-radius: 8px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.15s ease;
  margin-top: 4px;
}

.chat-history-load-more:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(6, 182, 212, 0.05);
}