/* Sidebar Styles */

#main-wrapper {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

#sidebar {
  width: var(--sidebar-width);
  background: rgba(23, 23, 23, 0.8);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
}

#sidebar.sidebar-hidden {
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  z-index: 10;
}

.sidebar-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-header h2 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

#chat-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  list-style: none;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
}

#chat-list::-webkit-scrollbar {
  width: 6px;
}

#chat-list::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 10px;
}

#chat-list li {
  padding: 0.875rem 1rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  min-width: 0;
}

#chat-list li:hover {
  background: var(--bg-elevated);
  border-color: var(--border-light);
}

#chat-list li.active {
  background: var(--bg-hover);
  border-color: var(--accent);
}

.chat-item-content {
  flex: 1;
  overflow: hidden;
}

.chat-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.ellipsis-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius);
  font-size: 1rem;
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition);
}

#chat-list li:hover .ellipsis-btn {
  opacity: 1;
}

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

.date-separator {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.date-separator hr {
  flex: 1;
  border: none;
  height: 1px;
  background: var(--border);
}

.date-separator span {
  padding: 0.25rem 0.75rem;
  background: var(--bg-surface);
  border-radius: var(--radius);
}