/* ===== IMPROVED SIDEBAR CSS - CLEAN & STABLE ===== */
/* Collapsed mode shows ONLY logo + toggle button, no extra elements */

:root {
  --sidebar-width-expanded: 280px;
  --sidebar-width-collapsed: 70px;   /* enough for centered icon + button */
  --transition-bezier: cubic-bezier(0.2, 0.9, 0.4, 1.1);
  --tooltip-bg: #1e1e2a;
  --bg-sidebar: #0f0f13;
  --border-color: #2a2a2e;
  --accent-cyan: #06b6d4;
  --text-primary: #f4f4f6;
  --text-muted: #a1a1aa;
}

/* ===== SIDEBAR CONTAINER ===== */
.sidebar {
  width: var(--sidebar-width-expanded);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  transition: width 0.35s var(--transition-bezier), padding 0.25s ease;
  overflow-x: hidden;
  overflow-y: auto;
  flex-shrink: 0;
  position: relative;
  height: 100vh;
  scrollbar-width: thin;
  will-change: width;
}

/* Smooth fade for inner content when collapsing/expanding */
.sidebar > * {
  transition: opacity 0.2s ease 0.05s;
}
.sidebar.collapsed > *:not(.sidebar-header) {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease, visibility 0s linear 0.15s;
}
.sidebar:not(.collapsed) > * {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s ease 0.05s, visibility 0s linear 0s;
}

/* Custom scrollbar */
.sidebar::-webkit-scrollbar {
  width: 5px;
}
.sidebar::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar::-webkit-scrollbar-thumb {
  background: #3f3f46;
  border-radius: 20px;
}
.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* ===== COLLAPSED STATE – ONLY LOGO + TOGGLE ===== */
.sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
  padding: 1.5rem 0.5rem;
}

/* Hide everything except sidebar-header */
.sidebar.collapsed .new-chat-btn,
.sidebar.collapsed .search-container,
.sidebar.collapsed .chat-history,
.sidebar.collapsed .chat-actions,       /* new container for delete button */
.sidebar.collapsed .index-stats,
.sidebar.collapsed .sidebar-footer,
.sidebar.collapsed .logo-text,
.sidebar.collapsed .index-stats,
.sidebar.collapsed .stats-files-list,
.sidebar.collapsed .stats-header,
.sidebar.collapsed .indexing-progress {
  display: none !important;
  opacity: 0;
  visibility: hidden;
}

/* Keep header visible and centered */
.sidebar.collapsed .sidebar-header {
  margin-bottom: 0;
  padding: 0;
  justify-content: center;
  flex-direction: column;
  gap: 20px;
}

/* Logo – centered, no glow */
.sidebar.collapsed .logo {
  justify-content: center;
  padding: 0;
  margin: 0;
}
.sidebar.collapsed .logo-icon {
  font-size: 1.8rem;
  margin: 0;
  transition: transform 0.2s ease;
}
.sidebar.collapsed .logo-icon:hover {
  transform: scale(1.05);
}

/* Toggle button – centered, clean, clickable */
.sidebar.collapsed .sidebar-toggle {
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}
.sidebar.collapsed .sidebar-toggle:hover {
  background: #27272a;
  border-color: var(--accent-cyan);
  transform: scale(1.02);
}

/* ===== SIDEBAR HEADER (expanded) ===== */
.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.75rem;
  padding: 0 4px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.logo-icon {
  font-size: 2rem;
  transition: transform 0.2s var(--transition-bezier);
}
.logo-icon:hover {
  transform: scale(1.05);
}
.logo-text {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  white-space: nowrap;
  background: linear-gradient(130deg, #ffffff, #22d3ee);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sidebar-toggle {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.sidebar-toggle:hover {
  background: #27272a;
  color: #ffffff;
  transform: scale(1.02);
  border-color: #52525b;
}

/* ===== NEW CHAT BUTTON ===== */
.new-chat-btn {
  width: 100%;
  padding: 12px 16px;
  background: linear-gradient(105deg, #e4e4e7 0%, #fafafa 100%);
  color: #09090b;
  border: none;
  border-radius: 16px;
  font-weight: 600;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.25s ease;
  margin-bottom: 1.25rem;
  white-space: nowrap;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}
.new-chat-btn:hover {
  background: linear-gradient(105deg, #22d3ee, #06b6d4);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(6, 182, 212, 0.35);
}
.new-chat-btn:active {
  transform: translateY(1px);
}

/* ===== SEARCH ===== */
.search-container {
  position: relative;
  margin-bottom: 1rem;
}
.search-input {
  width: 100%;
  padding: 10px 34px 10px 36px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  color: var(--text-primary);
  font-size: 0.85rem;
  transition: all 0.2s;
}
.search-input:focus {
  outline: none;
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.05);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
}
.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.85rem;
}
.clear-search {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 20px;
  font-size: 0.75rem;
  transition: all 0.15s;
}
.clear-search:hover {
  background: #3f3f46;
  color: white;
}
.clear-search.hidden {
  display: none;
}

/* ===== CHAT HISTORY ===== */
.chat-history {
  flex: 1;
  overflow-y: auto;
  margin: 0.5rem 0 0.75rem;
  padding-right: 2px;
}
.chat-history-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Group headers */
.group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  margin-top: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 10px;
  transition: all 0.2s;
}
.group-header:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}
.group-count {
  font-size: 0.65rem;
  font-weight: 400;
  opacity: 0.7;
}
.group-toggle {
  font-size: 0.7rem;
  transition: transform 0.25s ease;
}
.group-header.collapsed .group-toggle {
  transform: rotate(-90deg);
}
.group-items {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: hidden;
}
.group-header.collapsed + .group-items {
  display: none;
}

/* History items */
.history-item {
  padding: 8px 10px;
  border-radius: 14px;
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: all 0.18s ease;
  position: relative;
}
.history-item:hover {
  background: #27272a;
  color: white;
}
.history-item.active {
  background: rgba(6, 182, 212, 0.12);
  border-left: 2px solid #22d3ee;
  color: white;
}
.history-item-content {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  overflow: hidden;
}
.history-icon {
  font-size: 1rem;
  flex-shrink: 0;
  width: 22px;
  text-align: center;
}
.history-title {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Pin icon */
.pin-icon {
  opacity: 0;
  font-size: 0.7rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 5px;
  border-radius: 8px;
  transition: opacity 0.2s, transform 0.1s;
}
.history-item:hover .pin-icon {
  opacity: 1;
}
.pin-icon:hover {
  background: #3f3f46;
  transform: scale(1.1);
}
.pin-icon.pinned {
  opacity: 1;
  color: #22d3ee;
}

/* Action buttons */
.history-actions {
  display: flex;
  gap: 6px;
  visibility: hidden;
}
.history-item:hover .history-actions {
  visibility: visible;
}
.history-rename,
.history-delete {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 5px 8px;
  border-radius: 10px;
  transition: all 0.15s;
}
.history-rename:hover,
.history-delete:hover {
  background: #3f3f46;
  color: white;
  transform: scale(1.05);
}

/* Placeholder & skeleton */
.history-placeholder {
  text-align: center;
  padding: 40px 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
  opacity: 0.7;
}
.skeleton-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
}
.skeleton-icon,
.skeleton-text {
  background: linear-gradient(90deg, #27272a 25%, #3f3f46 50%, #27272a 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: 8px;
}
.skeleton-icon {
  width: 22px;
  height: 22px;
}
.skeleton-text {
  height: 14px;
  flex: 1;
}
@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== CHAT ACTIONS CONTAINER (Delete All Chats button moved here) ===== */
.chat-actions {
  margin: 0.5rem 0 1rem;
  padding: 0 4px;
}

/* Repositioned DELETE ALL CHATS button – clean, non-intrusive but visible */
.clear-chats-btn {
  width: 100%;
  padding: 10px 12px;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: 14px;
  color: #f87171;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  backdrop-filter: blur(2px);
}
.clear-chats-btn:hover {
  background: rgba(239, 68, 68, 0.18);
  border-color: #ef4444;
  color: #ff8a8a;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.2);
}
.clear-chats-btn:active {
  transform: translateY(1px);
}

/* ===== INDEX STATS - COMPLETE IMPROVED CSS ===== */
.index-stats {
  margin: 4px 0 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.index-stats:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(6, 182, 212, 0.3);
}

/* Stats Header */
.stats-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  padding: 4px 0;
  cursor: pointer;
  user-select: none;
}

.stats-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.stats-header:hover .stats-header-left {
  color: var(--text-primary);
}

.stats-toggle-icon {
  display: inline-block;
  transition: transform 0.25s ease;
  font-size: 0.65rem;
}

/* ===== CLEAR INDEX BUTTON - PROPER STYLES ===== */
#clear-index-btn {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #f87171;
  cursor: pointer;
  width: 28px;
  height: 28px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  padding: 0;
  flex-shrink: 0;
}

#clear-index-btn i {
  font-size: 0.75rem;
}

#clear-index-btn:hover {
  background: rgba(239, 68, 68, 0.18);
  border-color: #ef4444;
  color: #ff8a8a;
  transform: scale(1.05);
}

#clear-index-btn:active {
  transform: scale(0.98);
}

/* Stats wrapper - collapsible */
.stats-files-wrapper {
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
  max-height: 400px;
}

.stats-files-wrapper.collapsed {
  max-height: 0 !important;
}

/* Files list */
.stats-files-list {
  max-height: 240px;
  overflow-y: auto;
  font-size: 0.7rem;
  padding-right: 4px;
}

/* Custom scrollbar */
.stats-files-list::-webkit-scrollbar {
  width: 3px;
}
.stats-files-list::-webkit-scrollbar-track {
  background: transparent;
}
.stats-files-list::-webkit-scrollbar-thumb {
  background: #3f3f46;
  border-radius: 10px;
}
.stats-files-list::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* File item */
.stats-file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  gap: 8px;
  transition: background 0.15s ease;
  border-radius: 8px;
}

.stats-file-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* File name with icon */
.stats-file-name {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #d4d4d8;
  font-size: 0.7rem;
}

.stats-file-name::before {
  content: "📄";
  font-size: 0.65rem;
  opacity: 0.7;
}

/* Chunks badge */
.stats-file-chunks {
  font-size: 0.6rem;
  color: #a1a1aa;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 20px;
  font-weight: 500;
  flex-shrink: 0;
}

/* Delete file button (individual file delete) */
.delete-file-btn {
  background: transparent;
  border: none;
  color: #71717a;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 8px;
  font-size: 0.7rem;
  transition: all 0.2s ease;
  opacity: 0.4;
  display: flex;
  align-items: center;
  gap: 4px;
}

.delete-file-btn::before {
  content: "🗑️";
  font-size: 0.7rem;
}

.stats-file-item:hover .delete-file-btn {
  opacity: 0.7;
}

.delete-file-btn:hover {
  opacity: 1 !important;
  color: #f87171;
  background: rgba(239, 68, 68, 0.15);
  transform: scale(1.02);
}

/* Empty state */
.stats-empty {
  text-align: center;
  padding: 20px 8px;
  color: var(--text-muted);
  font-size: 0.7rem;
  opacity: 0.6;
  font-style: italic;
}

/* Progress bar */
.indexing-progress {
  margin-top: 12px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  gap: 10px;
}

.progress-bar-container {
  flex: 1;
  height: 5px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), #22d3ee);
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 10px;
}

.progress-text {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 8px;
  border-radius: 20px;
}

.hidden {
  display: none;
}

/* ===== FOOTER & USER INFO ===== */
.sidebar-footer {
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}
.user-info-container {
  width: 100%;
}
.user-info,
.user-info-placeholder {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px;
  border-radius: 16px;
  transition: all 0.2s;
  background: rgba(255, 255, 255, 0.02);
}
.user-info:hover,
.user-info-placeholder:hover {
  background: #27272a;
}
.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
  font-size: 1.3rem;
  transition: transform 0.2s;
}
.user-info:hover .user-avatar {
  transform: scale(1.04);
}
.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.user-details {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.user-name {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-status {
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  gap: 5px;
}
.user-status.online {
  color: #10b981;
}
.user-status.offline {
  color: #9ca3af;
}
.logout-btn,
.login-btn {
  background: rgba(255, 255, 255, 0.04);
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.logout-btn:hover,
.login-btn:hover {
  background: #3f3f46;
  color: white;
  transform: scale(1.05);
}
.login-btn {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
}
.login-btn:hover {
  background: rgba(59, 130, 246, 0.35);
}

/* ===== ACCESSIBILITY & MISC ===== */
.sidebar button:focus-visible {
  outline: 2px solid #22d3ee;
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  .sidebar,
  .sidebar * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
.history-item,
.new-chat-btn,
.clear-chats-btn,
.sidebar-toggle,
.logout-btn,
.login-btn,
.group-header {
  cursor: pointer;
  user-select: none;
}
.stats-files-wrapper {
    overflow: hidden;
    transition: max-height 0.3s ease;
    max-height: 500px;
}

.stats-files-wrapper.collapsed {
    max-height: 0 !important;
    padding: 0;
}