/* Sidebar */

/* Pre-paint collapsed state — prevents flash on refresh when sidebar was closed */
html[data-sidebar-collapsed="1"] .chat-sidebar {
  width: 0;
  opacity: 0;
  border-right: none;
  transition: none;
}

.chat-sidebar {
  width: 260px;
  background: var(--chat-sidebar-bg);
  border-right: var(--border-width-1) solid var(--chat-sidebar-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition:
    background 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.chat-sidebar.collapsed {
  width: 0;
  opacity: 0;
  border-right: none;
}

/* Container for sidebar toggle + new-chat — hidden by default, shown when collapsed */
.collapsed-header-actions {
  display: none;
  align-items: center;
  gap: var(--space-1);
  flex-shrink: 0;
  background: var(--chat-surface-hover);
  border-radius: var(--radius-full);
  border: var(--border-width-1) solid var(--chat-border);
  padding: 0.2rem;
}

html[data-theme="light"] .collapsed-header-actions {
  background: var(--color-white);
  border: var(--border-width-1) solid var(--chat-border);
}

.chat-sidebar.collapsed ~ .chat-main .collapsed-header-actions {
  display: flex;
}

/* Logogram link wrapper in header */
.chat-header-logogram-link {
  display: none;
  align-items: center;
  flex-shrink: 0;
}
.chat-sidebar.collapsed ~ .chat-main .chat-header-logogram-link {
  display: flex;
}

/* Logogram in header — only when sidebar is collapsed */
.chat-header-logogram {
  height: 24px;
  width: auto;
  display: block;
  flex-shrink: 0;
}
html[data-theme="dark"] .chat-header-logogram {
  filter: invert(1) brightness(0.85);
}

/* New chat button in header — visibility controlled by .collapsed-header-actions wrapper */
.header-newchat-btn {
  width: 34px;
  height: 34px;
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chat-text-muted);
  transition:
    background 0.15s,
    color 0.15s;
  flex-shrink: 0;
}
/* Wrapper handles the collapse so gap disappears too */
.header-newchat-wrap {
  transition:
    width 0.25s ease,
    opacity 0.25s ease,
    margin 0.25s ease;
  width: 34px;
  opacity: 1;
  overflow: hidden;
  flex-shrink: 0;
}
.header-newchat-wrap.hidden {
  width: 0;
  opacity: 0;
  margin: 0 !important;
  pointer-events: none;
}
/* Kill the flex gap too when newchat wrap is hidden */
.collapsed-header-actions:has(.header-newchat-wrap.hidden) {
  gap: 0;
}
.header-newchat-btn:hover {
  background: var(--chat-surface-hover-dark);
  color: var(--chat-text);
}

/* Session history list */
.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  margin-top: 0;
}

.session-item {
  display: flex;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: 0.375rem var(--space-2);
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--chat-link);
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s;
  position: relative;
}

.session-item-label {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  border-radius: 0.25rem;
  outline: none;
  padding: 0;
  box-sizing: border-box;
}

.session-item-label[contenteditable="true"] {
  white-space: nowrap;
  overflow: hidden;
  cursor: text;
  background: var(--chat-surface-hover);
  outline: none;
  border-radius: 0.25rem;
  text-overflow: clip;
  display: block;
  width: 100%;
}

.session-item-label[contenteditable="true"]::selection {
  background: var(--chat-accent);
  color: var(--chat-bg);
}

.session-more-btn {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: transparent;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chat-text-muted);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.15s,
    background 0.15s;
  flex-shrink: 0;
}

.session-item:hover .session-more-btn,
.session-item.active .session-more-btn {
  opacity: 1;
  pointer-events: auto;
}

.session-more-btn:hover {
  background: var(--chat-surface-hover);
}
#footerMoreBtn:hover {
  border-radius: 50%;
}

.session-item:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-link-hover);
}

.session-item.active {
  background: var(--chat-surface);
  color: var(--chat-text);
}

.session-item.pinned .session-item-label::before {
  display: none;
}

.session-pinned-icon {
  margin-right: 0.4rem;
  opacity: 0.6;
}

.session-menu-pin-icon,
.session-menu-icon {
  background-color: var(--chat-link);
  transition: background-color 0.12s;
}

.session-menu-item:hover .session-menu-icon,
.session-menu-item:hover .session-menu-pin-icon {
  background-color: var(--chat-link-hover);
}

.session-menu-item.danger .session-menu-icon {
  background-color: var(--chat-error-text);
}

/* Session context menu */
.session-menu {
  z-index: 260;
  background: var(--chat-input-bg);
  border: var(--border-width-1) solid var(--chat-border);
  border-radius: var(--radius-lg);
  padding: var(--space-1);
  min-width: 150px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.session-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: 0.45rem 0.65rem;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--chat-text);
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition:
    background 0.12s,
    color 0.12s;
}

.session-menu-item:hover {
  background: var(--chat-surface-hover);
}

.session-menu-item.danger {
  color: var(--chat-error-text);
}

.session-menu-item.danger:hover {
  background: var(--chat-error-bg);
}

.sidebar-top {
  padding: 1.125rem var(--space-2) var(--space-3) var(--space-3);
  flex-shrink: 0;
}

.sidebar-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0;
}

.sidebar-collapse-btn {
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--chat-text-muted);
  transition:
    background 0.15s,
    color 0.15s;
  flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
  background: var(--chat-surface-hover-dark);
  color: var(--chat-text);
  cursor: w-resize;
}

.sidebar-collapse-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

#collapseTooltip {
  z-index: 30;
}

.sidebar-logogram {
  display: none;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.sidebar-logo {
  height: 20px;
  width: auto;
  display: block;
  padding: 0;
}

.sidebar-new-chat-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background: transparent;
  border: none;
  border-radius: 0.6rem;
  color: var(--chat-link);
  font-family: inherit;
  font-size: 0.875rem;
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s;
  white-space: nowrap;
  width: 100%;
}

.sidebar-new-chat-btn:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-link-hover);
}

.sidebar-new-chat-btn img,
.sidebar-new-chat-btn .icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.sidebar-new-chat-btn .icon {
  background-color: currentColor;
}

.sidebar-body {
  flex: 1;
  overflow-y: auto;
  padding: 0 var(--space-2) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sidebar-section-label {
  font-size: 0.75rem;
  color: var(--chat-text-muted);
  letter-spacing: 0.04em;
  /* text-transform: uppercase; */
  margin-bottom: 0.35rem;
  white-space: nowrap;
  padding: 0 var(--space-1);
}

.sessions-recents-label {
  margin-bottom: 0;
  margin-top: var(--space-3);
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--chat-link);
  text-decoration: none;
  font-size: 0.875rem;
  transition:
    background 0.15s,
    color 0.15s;
  white-space: nowrap;
}

.sidebar-link:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-link-hover);
}

.sidebar-link svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
  flex-shrink: 0;
}

/* Sidebar primary nav */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background: transparent;
  border: none;
  border-radius: 0.6rem;
  color: var(--chat-link);
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  width: 100%;
  text-align: left;
  white-space: nowrap;
  transition:
    background 0.15s,
    color 0.15s;
}

.sidebar-nav-item:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-link-hover);
}

.sidebar-nav-item.active {
  background: var(--chat-surface);
  color: var(--chat-text);
}

.sidebar-nav-item.active:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-link-hover);
}

.sidebar-nav-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.local-storage-banner {
  margin: 0 var(--space-2) var(--space-2);
  border-radius: var(--radius-sm);
  border: var(--border-width-1) solid var(--chat-border-subtle);
  overflow: hidden;
  flex-shrink: 0;
}

.local-storage-banner-text {
  font-size: 0.75rem;
  color: var(--chat-text-muted);
  line-height: 1.45;
  padding: 0.6rem var(--space-3) var(--space-2);
  margin: 0;
}

.local-storage-banner-bar {
  height: 2px;
  background: var(--chat-border-subtle);
}

.local-storage-banner-progress {
  height: 100%;
  width: 100%;
  background: var(--chat-text-muted);
  transform-origin: right;
}

.sidebar-footer {
  padding: var(--space-3);
  border-top: var(--border-width-1) solid var(--chat-border-subtle);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.shortcuts-footer-btn {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  color: var(--chat-text-dim);
  opacity: 0.8;
  cursor: pointer;
  flex-shrink: 0;
  font-size: 0.875rem;
  line-height: 1;
  transition:
    background 0.15s,
    color 0.15s;
}
.shortcuts-footer-btn:hover {
  background: var(--chat-surface-hover);
  color: var(--chat-text);
}

/* Nav shortcut badges */
.nav-shortcut {
  margin-left: auto;
  font-size: 0.7rem;
  color: var(--chat-text-dim);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
}
body.show-shortcuts .nav-shortcut {
  opacity: 1;
}