/* DeepSeek-like dark theme when body.theme-ds-body is set (e.g. #/chat). */

body.theme-ds-body {
  --ds-bg: #0d0d0d;
  /* 右侧对话主区：比侧栏/页面略深的黑 */
  --ds-chat-main: #050505;
  --ds-surface: #1a1a1c;
  --ds-surface-2: #222224;
  --ds-border: rgba(255, 255, 255, 0.08);
  --ds-text: #e8e8e8;
  --ds-text-muted: rgba(232, 232, 232, 0.55);
  --ds-accent: #5eb3ff;
  --ds-accent-soft: rgba(94, 179, 255, 0.18);
  --ds-sidebar: #161618;
  --ds-topbar-bg: rgba(22, 22, 24, 0.92);
  --ds-accent-border: rgba(94, 179, 255, 0.25);
  --ds-accent-border-strong: rgba(94, 179, 255, 0.45);
  --ds-accent-link: rgba(94, 179, 255, 0.95);
  --ds-accent-scrollbar: rgba(94, 179, 255, 0.45);
  --ds-accent-scrollbar-hover: rgba(94, 179, 255, 0.65);
  --ds-panel: #222224;
  --ds-chat-scroll-track: #2e2e2e;
  --ds-chat-scroll-thumb: #7a7a7a;
  --ds-chat-scroll-thumb-hover: #909090;
  /* 左侧会话列表：贴近侧栏 #0d0d0d，选中仅略提亮 */
  --chat-sess-hover-bg: rgba(255, 255, 255, 0.05);
  --chat-sess-active-bg: rgba(255, 255, 255, 0.062);
  --chat-sess-border: rgba(255, 255, 255, 0.09);
  /* 用户消息气泡（微信式绿底深字） */
  --chat-user-bubble-bg: #42b983;
  --chat-user-bubble-fg: #111111;
  /* 弹层 / 菜单 / Toast */
  --ds-overlay-bg: rgba(0, 0, 0, 0.58);
  --ds-menu-hover-bg: rgba(255, 255, 255, 0.06);
  --ds-menu-sep: rgba(255, 255, 255, 0.08);
  --ds-pop-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  --ds-modal-shadow: 0 16px 48px rgba(0, 0, 0, 0.55);
  --ds-scroll-track-hover: rgba(255, 255, 255, 0.06);
  --ds-lightbox-bg: rgba(0, 0, 0, 0.78);
  --ds-lightbox-panel-bg: rgba(2, 6, 23, 0.55);
  --ds-lightbox-control-bg: rgba(15, 23, 42, 0.85);
  --ds-lightbox-control-fg: rgba(255, 255, 255, 0.9);
  --ds-lightbox-control-hover-bg: rgba(30, 41, 59, 0.9);
  --ds-lightbox-btn-bg: rgba(2, 6, 23, 0.45);
  --ds-lightbox-btn-hover-bg: rgba(30, 41, 59, 0.75);
  --ds-toast-bg: rgba(30, 30, 30, 0.92);
  --ds-toast-error-bg: rgba(160, 40, 40, 0.96);
  --ds-toast-fg: #ffffff;
  --ds-splash-bg: rgba(255, 255, 255, 0.04);
  --ds-splash-border: rgba(255, 255, 255, 0.1);
  --ds-splash-spinner-track: rgba(255, 255, 255, 0.15);
  --ds-splash-spinner-active: rgba(255, 255, 255, 0.75);
}

body.theme-ds-body .layout .sidebar {
  background: var(--ds-sidebar);
  border-right-color: var(--ds-border);
}

body.theme-ds-body .brand__title,
body.theme-ds-body .nav__item {
  color: var(--ds-text);
}

body.theme-ds-body .nav__item:hover {
  background: var(--ds-menu-hover-bg, rgba(255, 255, 255, 0.06));
}

body.theme-ds-body .nav__item--active {
  background: var(--ds-accent-soft);
  border: 1px solid var(--ds-accent-border);
  color: var(--ds-text);
}

body.theme-ds-body .sidebar__footer {
  border-top-color: var(--ds-border);
}

body.theme-ds-body .main {
  background: var(--ds-bg);
}

body.theme-ds-body .topbar {
  background: var(--ds-topbar-bg);
  border-bottom-color: var(--ds-border);
}

body.theme-ds-body .topbar__title {
  color: var(--ds-text);
}

body.theme-ds-body .content {
  color: var(--ds-text);
  /* Keep styles.css radial wash for themed shells; flatten only DeepSeek (no attribute). */
}

body.theme-ds-body:not([data-admin-theme]) .content {
  background: var(--ds-bg);
}

body.theme-ds-body .muted {
  color: var(--ds-text-muted);
}

body.theme-ds-body .btn {
  background: var(--ds-menu-hover-bg, rgba(255, 255, 255, 0.06));
  border-color: var(--ds-border);
  color: var(--ds-text);
}

body.theme-ds-body .btn:hover {
  background: var(--ds-menu-hover-bg, rgba(255, 255, 255, 0.1));
  filter: brightness(1.12);
}

body.theme-ds-body .btn--primary {
  background: var(--ds-accent-soft);
  border-color: var(--ds-accent-border-strong);
  color: var(--ds-text);
  filter: none;
}

body.theme-ds-body .input {
  background: var(--ds-surface-2);
  border-color: var(--ds-border);
  color: var(--ds-text);
}

body.theme-ds-body .card {
  background: var(--ds-surface);
  border-color: var(--ds-border);
  color: var(--ds-text);
}

/* Chat layout（侧栏与主区融入背景：无外侧框、无列间距） */
.chat-layout {
  display: flex;
  gap: 0;
  flex: 1;
  min-height: 0;
}

.chat-nav {
  width: 252px;
  flex-shrink: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border: none;
  border-radius: 0;
  background: var(--ds-bg);
  overflow: hidden;
}

.chat-nav__top {
  flex-shrink: 0;
  display: block;
  padding: 12px 0 6px;
  border-bottom: none;
}

.chat-nav__toolbar {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
  border-bottom: none;
  margin-top: -14px;
  position: relative;
  z-index: 1;
}

.chat-nav__new {
  margin: 0;
  width: 100%;
  box-sizing: border-box;
  min-height: 40px;
  padding: 8px 0 8px 8px;
  font-size: 13px;
  font-family: inherit;
  border-radius: 0;
  border: none;
  /* 与侧栏底一致，上移后与 logo 下沿重叠时盖住底边 */
  background: var(--ds-bg);
  color: inherit;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 6px;
  cursor: pointer;
  text-align: left;
  -webkit-appearance: none;
  appearance: none;
}

.chat-nav__new:hover {
  background: var(--chat-sess-hover-bg, rgba(255, 255, 255, 0.06));
}

.chat-nav__newGlyph {
  flex-shrink: 0;
  position: relative;
  display: inline-block;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.14);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.22);
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.chat-nav__new:hover .chat-nav__newGlyph {
  background-color: rgba(255, 255, 255, 0.22);
  transform: scale(1.05);
}

.chat-nav__newGlyph::before,
.chat-nav__newGlyph::after {
  content: "";
  position: absolute;
  background-color: #fff;
  border-radius: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.chat-nav__newGlyph::before {
  width: 14px;
  height: 2px;
}

.chat-nav__newGlyph::after {
  width: 2px;
  height: 14px;
}

.chat-nav__newLabel,
.chat-nav__newText {
  font-size: 13px;
  line-height: 1.2;
  white-space: nowrap;
}

.chat-nav__brand {
  flex: 1;
  min-width: 0;
  font-family: "Outfit", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
  line-height: 1.25;
}

.chat-nav__brandWrap {
  width: 100%;
  max-width: 180px;
  height: 44px;
  overflow: hidden;
  border-radius: 0;
}

.chat-nav__brandLogo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 负水平偏移：在 cover 裁切下再向左露出一点画面 */
  object-position: -10px center;
}


.chat-nav__scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0 0 6px;
}

.chat-sessions__list {
  padding: 0;
}

.chat-nav__footer {
  flex-shrink: 0;
  border-top: none;
  padding: 10px 0 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: transparent;
}

.chat-nav__user {
  min-height: 0;
}

.chat-nav__user-name {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.35;
  word-break: break-word;
}

.chat-nav__user-role {
  font-size: 11px;
  margin-top: 2px;
  line-height: 1.3;
}

.chat-nav__link {
  display: inline-block;
  font-size: 13px;
  color: var(--ds-accent-link);
  text-decoration: none;
}

.chat-nav__link:hover {
  text-decoration: underline;
}

.chat-nav__footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.chat-sess-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 0 10px 8px;
  margin-bottom: 0;
  border-radius: 0;
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-size: 13px;
}

.chat-sess-btn:hover {
  background: transparent;
}

.chat-sess-row {
  border: 1px solid transparent;
  border-radius: 0;
}

.chat-sess-row:hover {
  background: var(--chat-sess-hover-bg, rgba(255, 255, 255, 0.06));
  border-color: var(--chat-sess-border, rgba(255, 255, 255, 0.12));
}

.chat-sess-row--active {
  background: var(--chat-sess-active-bg, rgba(255, 255, 255, 0.062));
  border-color: var(--chat-sess-border, rgba(255, 255, 255, 0.08));
}

.chat-sess-row--active .chat-sess-btn {
  color: var(--ds-text, #e8e8e8);
}

.chat-sess-row .chat-sess-more {
  opacity: 0;
  pointer-events: none;
}

.chat-sess-row:hover .chat-sess-more,
.chat-sess-row:focus-within .chat-sess-more {
  opacity: 1;
  pointer-events: auto;
}

.chat-sess-row .chat-sess-more--active {
  opacity: 1;
  pointer-events: auto;
}

.chat-main {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  border: none;
  border-radius: 0;
  background: var(--ds-chat-main, #050505);
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* 滚动条：管理台等仍用隐藏式；独立 /chat 页见文件末尾 body.chat-standalone-page */
.chat-msg__reasoning-pre,
.chat-pending-files,
.table-wrap,
.session-monitor-modal__card {
  scrollbar-width: thin;
  scrollbar-color: transparent transparent;
}

.chat-msg__reasoning-pre:hover,
.chat-pending-files:hover,
.table-wrap:hover,
.session-monitor-modal__card:hover {
  scrollbar-color: var(--ds-accent-scrollbar) var(--ds-scroll-track-hover);
}

.chat-msg__reasoning-pre::-webkit-scrollbar,
.chat-pending-files::-webkit-scrollbar,
.table-wrap::-webkit-scrollbar,
.session-monitor-modal__card::-webkit-scrollbar {
  width: 0px;
  height: 0px;
}

.chat-msg__reasoning-pre:hover::-webkit-scrollbar,
.chat-pending-files:hover::-webkit-scrollbar,
.table-wrap:hover::-webkit-scrollbar,
.session-monitor-modal__card:hover::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

.chat-msg__reasoning-pre::-webkit-scrollbar-track,
.chat-pending-files::-webkit-scrollbar-track,
.table-wrap::-webkit-scrollbar-track,
.session-monitor-modal__card::-webkit-scrollbar-track {
  background: transparent;
  border-radius: 999px;
}

.chat-msg__reasoning-pre::-webkit-scrollbar-thumb,
.chat-pending-files::-webkit-scrollbar-thumb,
.table-wrap::-webkit-scrollbar-thumb,
.session-monitor-modal__card::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 999px;
}

.chat-msg__reasoning-pre:hover::-webkit-scrollbar-track,
.chat-pending-files:hover::-webkit-scrollbar-track,
.table-wrap:hover::-webkit-scrollbar-track,
.session-monitor-modal__card:hover::-webkit-scrollbar-track {
  background: var(--ds-scroll-track-hover);
}

.chat-msg__reasoning-pre:hover::-webkit-scrollbar-thumb,
.chat-pending-files:hover::-webkit-scrollbar-thumb,
.table-wrap:hover::-webkit-scrollbar-thumb,
.session-monitor-modal__card:hover::-webkit-scrollbar-thumb {
  background: var(--ds-accent-scrollbar);
}

.chat-msg__reasoning-pre::-webkit-scrollbar-thumb:hover,
.chat-pending-files::-webkit-scrollbar-thumb:hover,
.table-wrap::-webkit-scrollbar-thumb:hover,
.session-monitor-modal__card::-webkit-scrollbar-thumb:hover {
  background: var(--ds-accent-scrollbar-hover);
}

.chat-msg {
  max-width: 92%;
  padding: 6px 12px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  width: 100%;
  box-sizing: border-box;
}

.chat-row--assistant {
  justify-content: flex-start;
}

.chat-row--user {
  justify-content: flex-end;
}

/* 对话区宽度：用户消息不超过中线（右半区减头像轨）；助手消息可越过中线约 2cm。50% 相对 .chat-messages 内一行宽度。 */
.chat-msg-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

/* 与 .chat-avatar-slot 48px + .chat-row gap 10px 一致 */
.chat-msg-col--assistant {
  /* 宽度随容器自适应，但最宽限制为 50% + 2cm（扣除头像轨 58px）。 */
  flex: 1 1 auto;
  width: auto;
  max-width: min(max(0px, calc(50% + 2cm - 58px)), 100%);
  align-items: flex-start;
}

.chat-msg-col--user {
  align-items: flex-end;
  max-width: min(max(0px, calc(50% - 58px)), 100%);
}

.chat-msg-col .chat-msg {
  max-width: 100%;
}

.chat-msg-col--user .chat-msg--user {
  align-self: flex-end;
}

.chat-avatar-slot {
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  border-radius: 999px;
}

.chat-avatar {
  display: block;
  width: 48px;
  height: 48px;
  max-width: 100%;
  max-height: 100%;
  min-width: 0;
  min-height: 0;
  border-radius: 999px;
  object-fit: cover;
  flex-shrink: 0;
  box-sizing: border-box;
}

/* 与助手侧 oliver.svg 一致：浅底 + 内边距，矢量用 contain（避免大 viewBox 在 flex 下撑开一行） */
.chat-avatar--bot {
  background: rgba(255, 255, 255, 0.08);
  padding: 5px;
  object-fit: contain;
}

.chat-avatar--userBuiltin {
  background: rgba(255, 255, 255, 0.08);
  padding: 5px;
  object-fit: contain;
}

.chat-avatar--userPhoto {
  object-fit: cover;
  padding: 0;
  background: transparent;
}

.chat-row--meta {
  padding-left: 58px;
  max-width: min(calc(50% + 2cm), 100%);
  box-sizing: border-box;
}

.chat-msg__time {
  font-size: 11px;
  line-height: 1.3;
  color: var(--ds-text-muted, rgba(232, 232, 232, 0.5));
  margin-bottom: 6px;
  white-space: nowrap;
  user-select: none;
}

.chat-msg--user {
  align-self: flex-end;
  background: var(--chat-user-bubble-bg, #42b983);
  color: var(--chat-user-bubble-fg, #111);
  border: 1px solid rgba(0, 0, 0, 0.12);
}

.chat-msg--user .chat-msg__md,
.chat-msg--user .chat-msg__plain {
  color: inherit;
}

.chat-msg--user .chat-msg__md a {
  color: #0b4d8c;
}

.chat-msg--user .chat-msg__md pre,
.chat-msg--user .chat-msg__md code {
  background: rgba(0, 0, 0, 0.12);
  color: #111;
  border-color: rgba(0, 0, 0, 0.12);
}

.chat-msg--assistant {
  align-self: flex-start;
  width: auto;
  max-width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--ds-border, rgba(255, 255, 255, 0.08));
}

.chat-msg__actions {
  margin-top: 6px;
  display: flex;
  gap: 8px;
  justify-content: flex-start;
  opacity: 0;
  pointer-events: none;
  transition: opacity 120ms ease;
}

.chat-msg-col:hover .chat-msg__actions {
  opacity: 1;
  pointer-events: auto;
}

.chat-msg__action-btn {
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: transparent;
  color: rgba(203, 213, 225, 0.92);
  border-radius: 999px;
  font-size: 15px;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
}

.chat-msg__action-btn:hover {
  background: rgba(30, 41, 59, 0.45);
}

.chat-msg__action-btn--danger {
  border-color: rgba(248, 113, 113, 0.45);
  color: #fca5a5;
}

.chat-msg__md .mermaid {
  display: block;
  width: 100%;
  overflow: auto;
  padding: 8px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.35);
}

.chat-msg__md .mermaid svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.chat-img-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: var(--ds-lightbox-bg, rgba(0, 0, 0, 0.78));
  backdrop-filter: blur(2px);
}

.chat-img-lightbox__inner {
  position: relative;
  width: min(96vw, 1400px);
  max-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  border: 1px solid var(--ds-border, rgba(148, 163, 184, 0.28));
  background: var(--ds-lightbox-panel-bg, rgba(2, 6, 23, 0.55));
  overflow: hidden;
}

.chat-img-lightbox__close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--ds-border, rgba(148, 163, 184, 0.35));
  background: var(--ds-lightbox-control-bg, rgba(15, 23, 42, 0.85));
  color: var(--ds-lightbox-control-fg, rgba(255, 255, 255, 0.9));
  cursor: pointer;
  font-size: 22px;
  line-height: 32px;
}

.chat-img-lightbox__close:hover {
  background: var(--ds-lightbox-control-hover-bg, rgba(30, 41, 59, 0.9));
}

.chat-img-lightbox__img {
  max-width: none;
  max-height: none;
  width: auto;
  height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}

.chat-img-lightbox__viewportWrap {
  width: min(96vw, 1400px);
  max-height: 92vh;
  overflow: auto;
  padding: 14px;
  cursor: grab;
}

.chat-img-lightbox__viewportWrap--dragging {
  cursor: grabbing;
}

.chat-img-lightbox__viewport {
  transform-origin: 0 0;
}

.chat-mermaid-lightbox__svg {
  width: min(96vw, 1400px);
  max-height: 92vh;
  overflow: auto;
  padding: 14px;
  cursor: grab;
}

.chat-mermaid-lightbox__svg--dragging {
  cursor: grabbing;
}

.chat-mermaid-lightbox__viewport {
  transform-origin: 0 0;
}

.chat-mermaid-lightbox__toolbar {
  position: absolute;
  left: 10px;
  top: 10px;
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 6px 8px;
  border-radius: 12px;
  border: 1px solid var(--ds-border, rgba(148, 163, 184, 0.35));
  background: var(--ds-lightbox-control-bg, rgba(15, 23, 42, 0.85));
  z-index: 2;
}

.chat-mermaid-lightbox__btn {
  width: 40px;
  height: 32px;
  border-radius: 10px;
  border: 1px solid var(--ds-border, rgba(148, 163, 184, 0.3));
  background: var(--ds-lightbox-btn-bg, rgba(2, 6, 23, 0.45));
  color: var(--ds-lightbox-control-fg, rgba(255, 255, 255, 0.92));
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.chat-mermaid-lightbox__btn:hover {
  background: var(--ds-lightbox-btn-hover-bg, rgba(30, 41, 59, 0.75));
}

.chat-img-lightbox__btn--icon {
  width: 40px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
}

.chat-mermaid-lightbox__zoom {
  color: var(--ds-text-muted, rgba(226, 232, 240, 0.9));
  font-size: 12px;
  padding-left: 2px;
}

.chat-toast-host {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 420px;
  pointer-events: none;
}

.chat-toast {
  pointer-events: auto;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--ds-toast-fg, #fff);
  box-shadow: var(--ds-pop-shadow, 0 8px 24px rgba(0, 0, 0, 0.35));
  background: var(--ds-toast-bg, rgba(30, 30, 30, 0.92));
  border: 1px solid var(--ds-border, transparent);
  font-size: 12.5px;
  line-height: 1.35;
  white-space: pre-wrap;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.chat-toast--error {
  background: var(--ds-toast-error-bg, rgba(160, 40, 40, 0.96));
  color: #ffffff;
  border-color: transparent;
}

.chat-mermaid-lightbox__svg svg {
  width: max(980px, 96vw);
  max-width: 100%;
  height: auto;
}

.chat-msg__md .mermaid .mermaid-fallback {
  padding: 8px;
  border-radius: 8px;
  background: rgba(2, 6, 23, 0.55);
}

.chat-msg__md .mermaid .mermaid-fallback__err {
  color: #fca5a5;
  margin-bottom: 6px;
  font-size: 12px;
}

.chat-msg__md .mermaid .mermaid-fallback pre {
  margin: 0;
  white-space: pre-wrap;
  color: #e5e7eb;
}

.chat-msg--tool {
  align-self: flex-start;
  font-family: ui-monospace, monospace;
  font-size: 12px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px dashed rgba(255, 255, 255, 0.12);
}

/* In-dialog progress (e.g. Core: analyzing request…) during stream; not the footer status line */
.chat-msg--thinking {
  align-self: flex-start;
  max-width: 95%;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ds-text-muted, rgba(232, 232, 232, 0.72));
  background: rgba(255, 255, 255, 0.04);
  border: 1px dashed rgba(255, 255, 255, 0.14);
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-task-stage {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  cursor: default;
}

.chat-task-stage__toggle {
  margin-left: auto;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--ds-text-muted, rgba(232, 232, 232, 0.72));
  border-radius: 8px;
  padding: 1px 6px;
  line-height: 1.2;
  cursor: pointer;
}

.chat-task-stage__toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* Fold model reasoning blocks in assistant bubbles (same rules as Streamlit messages.py). */
.chat-msg--rich {
  display: flex;
  flex-direction: column;
  gap: 6px;
  white-space: normal;
}

.chat-msg__text {
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-msg__reasoning {
  align-self: stretch;
  margin: 4px 0 2px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  padding: 4px 10px 6px;
}

.chat-msg__reasoning:not([open]) {
  padding-bottom: 2px;
}

.chat-msg__reasoning > summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--ds-text-muted, rgba(232, 232, 232, 0.7));
  padding: 2px 2px 4px;
  user-select: none;
  list-style-position: outside;
}

.chat-msg__reasoning[open] > summary {
  color: var(--ds-text, #e8e8e8);
  margin-bottom: 6px;
}

.chat-msg__reasoning-pre {
  margin: 0;
  padding: 8px 10px;
  max-height: 260px;
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.chat-msg__reasoning-block {
  margin-bottom: 8px;
}

.chat-msg__timeline-logs {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 6px 0 2px;
}

.chat-msg__timeline-detail {
  margin-top: 0;
}

.chat-msg__process-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.chat-msg__process-summary::-webkit-details-marker {
  display: none;
}

.chat-msg__process-summary::marker {
  content: "";
}

.chat-msg__process-status {
  color: var(--ds-text-muted, rgba(232, 232, 232, 0.78));
}

.chat-msg__process-caret {
  color: rgba(232, 232, 232, 0.6);
  font-size: 12px;
  line-height: 1;
}

.chat-msg__reasoning-title {
  font-size: 11px;
  opacity: 0.78;
  margin-bottom: 4px;
}

.chat-composer {
  flex-shrink: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 10px 12px 12px;
}

.chat-composer textarea {
  font-family: inherit;
  font-size: 14px;
}

.chat-status {
  padding: 6px 12px;
  font-size: 12px;
  color: var(--ds-text-muted, rgba(232, 232, 232, 0.55));
}

/* 独立 /chat：左侧会话列表不显示滚动条（仍可滚轮滚动），右侧消息区灰滚动条 */
body.chat-standalone-page .chat-nav__scroll {
  scrollbar-width: none;
  -ms-overflow-style: none;
}

body.chat-standalone-page .chat-nav__scroll::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

body.chat-standalone-page .chat-messages {
  scrollbar-width: thin;
  scrollbar-color: var(--ds-chat-scroll-thumb) var(--ds-chat-scroll-track);
}

body.chat-standalone-page .chat-messages::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

body.chat-standalone-page .chat-messages::-webkit-scrollbar-track {
  background: var(--ds-chat-scroll-track);
}

body.chat-standalone-page .chat-messages::-webkit-scrollbar-thumb {
  background: var(--ds-chat-scroll-thumb);
  border-radius: 0;
}

body.chat-standalone-page .chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--ds-chat-scroll-thumb-hover);
}