:root {
  --app-height: 100vh;
  /*
   * 全站字体栈（改 font-family 族前须先明确需求）。
   * UI：有网时 index.html 外链 Inter + Noto Sans SC；外链失败则仅用后续系统无衬线。
   * 拉丁优先 Inter，中文缺字形由 Noto Sans SC 补。
   * 代码：行内/块 code 与 pre → Source Code Pro（Google 文件名 source-code-pro）+ Menlo …
   */
  --font-ui: Inter, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Segoe UI", system-ui, sans-serif;
  --font-mono: "Source Code Pro", Menlo, Monaco, Consolas, "Courier New", monospace;
}

/* ─── 重置与基础 ──────────────────────────────────────────────────── */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  font-family: var(--font-ui);
}

body {
  font-family: inherit;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.06), transparent 28%),
    linear-gradient(180deg, #f7f8fb 0%, #f2f4f8 100%);
  color: #1a1a1a;
  height: var(--app-height);
  overflow: hidden;
}

body.settings-page {
  display: flex;
  flex-direction: column;
  min-height: var(--app-height);
  height: var(--app-height);
  overflow: hidden;
  background: #fff;
}

button,
input,
textarea,
select,
optgroup {
  font-family: inherit;
}

[hidden] {
  display: none !important;
}

/* 全文等宽：<code>、<kbd>、<samp>、<pre>（含 fenced 与非 Markdown 片段） */
code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
}

/* highlight.js github 主题会写 SFMono/ui-monospace；统一回站点等宽栈 */
.hljs,
pre code.hljs,
code.hljs {
  font-family: var(--font-mono) !important;
}

/* ─── 布局 ─────────────────────────────────────────────────────────── */

#app {
  display: flex;
  height: var(--app-height);
  min-height: 0;
}

/* ─── 侧边栏 ───────────────────────────────────────────────────────── */

#sidebar {
  width: 236px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-right: 1px solid #e5e5e5;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 100;
  transition: transform 0.25s ease;
}

.sidebar-header {
  padding: 18px 16px 10px;
  border-bottom: 1px solid #f0f0f0;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.sidebar-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  flex-shrink: 0;
}

.sidebar-title {
  font-size: 17px;
  font-weight: 700;
  color: #1a1a1a;
  letter-spacing: -0.3px;
  margin: 0;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-subtitle {
  font-size: 12px;
  color: #999;
  margin-top: 2px;
}

/* ─── 会话列表 ─────────────────────────────────────────────────────── */

.sidebar-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 6px;
  font-size: 11px;
  font-weight: 600;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.section-refresh {
  background: none;
  border: none;
  color: #bbb;
  cursor: pointer;
  padding: 2px;
  border-radius: 4px;
  display: flex;
  transition: color 0.15s, background 0.15s;
}

.section-refresh:hover {
  color: #666;
  background: #f0f0f0;
}

.session-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 8px 6px;
}

.session-list::-webkit-scrollbar { width: 4px; }
.session-list::-webkit-scrollbar-thumb { background: #ddd; border-radius: 2px; }

.session-empty {
  padding: 16px 10px;
  color: #bbb;
  font-size: 12px;
  text-align: center;
}

/* 会话条目 */
.session-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px;
  align-items: center;
  width: 100%;
  background: transparent;
  border: none;
  border-radius: 10px;
  transition: background 0.15s;
  margin-bottom: 3px;
}

.session-item:hover { background: #f5f5f5; }
.session-item.active { background: #f0f7ff; }

.session-item-main {
  min-width: 0;
  text-align: left;
  padding: 8px 4px 8px 10px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.session-item-name {
  font-size: 13px;
  font-weight: 500;
  color: #1a1a1a;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-item-meta {
  font-size: 10px;
  color: #bbb;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 4px;
}

.session-delete-btn {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  justify-self: end;
  margin-right: 4px;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: #bbb;
  cursor: pointer;
  opacity: 0;
  transition: background 0.15s, color 0.15s, opacity 0.15s;
}

.session-item:hover .session-delete-btn,
.session-item.active .session-delete-btn,
.session-delete-btn:focus-visible {
  opacity: 1;
}

.session-delete-btn:hover {
  color: #dc2626;
  background: #fee2e2;
}

/* ─── 侧边栏操作按钮 ─────────────────────────────────────────────── */

.sidebar-actions {
  padding: 8px 10px 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-actions button {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  background: transparent;
  border: none;
  border-radius: 10px;
  color: #555;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.sidebar-actions button:hover {
  background: #f0f0f0;
  color: #1a1a1a;
}

.sidebar-actions button svg {
  flex-shrink: 0;
}

/* ─── 侧边栏底部状态 ──────────────────────────────────────────────── */

.sidebar-status {
  padding: 12px 16px;
  border-top: 1px solid #f0f0f0;
}

.status-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #888;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.connected { background: #22c55e; }
.status-dot.streaming { background: #f59e0b; animation: pulse 1.2s ease-in-out infinite; }
.status-dot.disconnected { background: #ef4444; }

.status-model {
  font-size: 10px;
  color: #bbb;
  margin-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ─── 移动端遮罩层 ────────────────────────────────────────────────── */

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 99;
}

/* ─── 主区域 ───────────────────────────────────────────────────────── */

#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: #fff;
}

/* ─── 顶部栏 ───────────────────────────────────────────────────────── */

#header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid #f0f0f0;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  flex-wrap: wrap;
}

.header-trailing {
  margin-left: auto;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-shrink: 0;
  max-width: min(68%, 680px);
  min-width: 0;
}

.menu-btn {
  display: none;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: #555;
  cursor: pointer;
  flex-shrink: 0;
}

.menu-btn:hover { background: #f0f0f0; color: #1a1a1a; }

.header-info {
  flex: 1 1 auto;
  min-width: 0;
}

.header-info h1 {
  font-size: 15px;
  font-weight: 600;
  color: #1a1a1a;
}

.header-meta {
  font-size: 11px;
  color: #999;
}

.header-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 8px;
  color: #dc2626;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s;
  flex-shrink: 0;
}

.header-btn:hover { background: #fee2e2; }

.model-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.model-select,
.thinking-select {
  height: 30px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #fff;
  color: #374151;
  font-size: 11px;
  outline: none;
}

.model-select {
  width: min(260px, 28vw);
}

.thinking-select {
  width: 86px;
}

.model-select:focus,
.thinking-select:focus {
  border-color: #93c5fd;
  box-shadow: 0 0 0 2px rgba(147, 197, 253, 0.22);
}

.model-select:disabled,
.thinking-select:disabled {
  color: #9ca3af;
  background: #f9fafb;
  cursor: not-allowed;
}

/* ─── 主区上下文条（与 TUI Footer 统计行同源：get_state.stats + model） ─ */

.session-context-bar {
  flex-shrink: 0;
  padding: 6px 16px 7px;
  border-bottom: 1px solid #f0f0f0;
  background: rgba(250, 251, 253, 0.97);
  font-size: 11px;
  line-height: 1.42;
  color: #5c6578;
}

/* 并入顶栏右上角：不占整宽独立一行 */
.session-context-bar.session-context-in-header {
  border: none;
  background: transparent;
  padding: 0;
  max-width: 100%;
  text-align: right;
}

.session-context-in-header .session-context-row {
  justify-content: flex-end;
}

.session-context-in-header.session-context-bar .session-context-primary-wrap .session-context-row {
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.session-context-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.session-context-left {
  flex: 1;
  min-width: 0;
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.session-context-in-header .session-context-left,
.session-context-in-header .session-context-right {
  flex: 0 1 auto;
  max-width: 100%;
  text-align: right;
}

.session-context-right {
  flex-shrink: 0;
  text-align: right;
  opacity: 0.95;
  max-width: 46%;
}

#sessionContextSecondary {
  margin-top: 3px;
  font-size: 10px;
  color: #8b95a8;
}

.session-context-in-header #sessionContextSecondary {
  margin-top: 2px;
}

#sessionContextSecondary:empty {
  display: none;
}

.session-context-bar .ctx-warn {
  color: #b45309;
  font-weight: 500;
}

.session-context-bar .ctx-danger {
  color: #b91c1c;
  font-weight: 500;
}

/* ─── 聊天区域 ─────────────────────────────────────────────────────── */

#chat {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 0;
}

#chat::-webkit-scrollbar { width: 6px; }
#chat::-webkit-scrollbar-track { background: transparent; }
#chat::-webkit-scrollbar-thumb { background: #ddd; border-radius: 3px; }
#chat::-webkit-scrollbar-thumb:hover { background: #ccc; }

/* 空状态 */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: #bbb;
  text-align: center;
  gap: 8px;
}

.empty-icon { color: #ddd; }
.empty-state p { font-size: 13px; }
.empty-hint { font-size: 11px; color: #ccc; }

/* ─── 消息 ─────────────────────────────────────────────────────────── */

.msg {
  max-width: min(700px, 100%);
  padding: 10px 12px;
  line-height: 1.4;
  font-size: 16px;
  word-wrap: break-word;
  white-space: pre-wrap;
}

.msg.user {
  align-self: flex-end;
  background: linear-gradient(180deg, #f0f7ff 0%, #eaf2ff 100%);
  border: 1px solid #dbeafe;
  border-radius: 14px 14px 4px 14px;
  margin: 0 0 2px;
  color: #1a1a1a;
}

.msg.assistant {
  align-self: flex-start;
  margin: 0;
  padding: 0;
  color: #1a1a1a;
  line-height: 1.32;
}

.msg.system {
  align-self: center;
  color: #aaa;
  font-size: 11px;
  text-align: center;
  padding: 6px 10px;
}

.msg.thinking {
  align-self: flex-start;
  color: #888;
  font-size: 13px;
  font-style: italic;
  padding: 8px 0 8px 16px;
  border-left: 3px solid #e5e5e5;
  margin: 0;
}

.msg.tool_call {
  align-self: flex-start;
  font-size: 13px;
  font-family: var(--font-mono);
  color: #666;
  padding: 0;
  margin: 0 0 4px 12px;
  background: #fafafa;
  border-radius: 10px;
  border: 1px solid #eee;
  line-height: 1.4;
  max-width: min(680px, 100%);
}

.tool-call-collapsible {
  margin: 0;
}

.tool-call-collapsible > .tool-call-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  user-select: none;
  font-weight: 500;
  color: #555;
}

.tool-call-collapsible > .tool-call-summary::-webkit-details-marker {
  display: none;
}

.tool-call-summary::before {
  content: "";
  width: 0;
  height: 0;
  border-left: 5px solid #888;
  border-top: 3.5px solid transparent;
  border-bottom: 3.5px solid transparent;
  flex-shrink: 0;
  transform: rotate(0deg);
  transition: transform 0.15s ease;
}

.tool-call-collapsible[open] > .tool-call-summary::before {
  transform: rotate(90deg);
}

.tool-call-summary-text {
  min-width: 0;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-call-detail {
  margin: 0;
  padding: 6px 10px 8px;
  border-top: 1px solid #eee;
}

.tool-call-detail-pre {
  margin: 0;
  padding: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 12px;
  line-height: 1.45;
}

.msg.tool_result {
  align-self: flex-start;
  font-size: 12px;
  font-family: var(--font-mono);
  color: #666;
  padding: 8px 12px;
  margin: 0 0 2px 14px;
  background: #fafafa;
  border-radius: 10px;
  border: 1px solid #eee;
  max-height: 200px;
  overflow-y: auto;
}

/* ─── Markdown 渲染内容 ──────────────────────────────────────────── */

.msg.assistant h1, .msg.assistant h2, .msg.assistant h3,
.msg.assistant h4, .msg.assistant h5, .msg.assistant h6 {
  margin: 0.2em 0 0.04em;
  font-weight: 600;
  line-height: 1.25;
}
.msg.assistant h1 { font-size: 1.22em; }
.msg.assistant h2 { font-size: 1.12em; }
.msg.assistant h3 { font-size: 1.04em; }
.msg.assistant h4 { font-size: 1em; }

.msg.assistant p { margin: 0.03em 0; }
.msg.assistant p:first-child { margin-top: 0; }
.msg.assistant p:last-child { margin-bottom: 0; }

.msg.assistant strong { font-weight: 600; }
.msg.assistant em { font-style: italic; }

.msg.assistant a {
  color: #2563eb;
  text-decoration: none;
}
.msg.assistant a:hover { text-decoration: underline; }

.msg.assistant ul, .msg.assistant ol {
  margin: 0.02em 0;
  padding-left: 1.05em;
}
.msg.assistant li {
  margin: 0;
}
.msg.assistant li + li {
  margin-top: 0.04em;
}

/* marked 常在 <li> 内包一层或多层 <p>，会与 li 边距叠加出大块留白 */
.msg.assistant li > p {
  margin: 0;
}
.msg.assistant li > p + p {
  margin-top: 0.06em;
}

.msg.assistant li ul,
.msg.assistant li ol {
  margin: 0.03em 0 0.06em;
}

.msg.assistant blockquote {
  margin: 0.08em 0;
  padding: 2px 8px;
  border-left: 2px solid #e5e5e5;
  color: #666;
}

.msg.assistant hr {
  border: none;
  border-top: 1px solid #eee;
  margin: 0.2em 0;
}

.msg.assistant table {
  border-collapse: collapse;
  margin: 0.06em 0;
  font-size: 13px;
  width: 100%;
}
.msg.assistant th, .msg.assistant td {
  border: 1px solid #e5e5e5;
  padding: 4px 7px;
  text-align: left;
}
.msg.assistant th {
  background: #fafafa;
  font-weight: 600;
}

.msg.assistant code:not(.hljs) {
  font-size: 0.9em;
  background: #f5f5f5;
  padding: 2px 6px;
  border-radius: 4px;
  color: #d63384;
  word-break: break-word;
}

.msg.assistant pre.assistant-pre {
  margin: 0.35em 0;
  padding: 0;
  background: transparent;
  border: 1px solid #e8edf2;
  border-radius: 8px;
  overflow-x: auto;
  line-height: 1.5;
}

.msg.assistant pre.assistant-pre code.hljs {
  display: block;
  padding: 12px 14px;
  background: none;
  border: none;
  color: inherit;
  font-size: 14px;
  line-height: 1.5;
  word-break: normal;
  tab-size: 2;
}

.msg.assistant img {
  max-width: 100%;
  border-radius: 8px;
  margin: 0.06em 0;
}

/* 流式光标 */
.msg.streaming::after {
  content: "▊";
  animation: blink 0.8s step-end infinite;
  color: #2563eb;
  margin-left: 1px;
}

@keyframes blink { 50% { opacity: 0; } }

/* 消息分隔线 */
.msg.assistant + .msg.assistant {
  border-top: 1px solid #f0f0f0;
  padding-top: 4px;
}

/* ─── 设置页 ─────────────────────────────────────────────────────── */

.settings-view {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  background: #fff;
  padding: 18px 18px 22px;
}

.settings-page-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  width: 100%;
  padding: 0;
}

.settings-page-header {
  flex-shrink: 0;
  width: 100%;
  margin: 0;
  padding: max(14px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) 14px max(18px, env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid #eef0f3;
  background: #fafbfc;
}

.settings-page-title {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.settings-page-title h1 {
  font-size: 18px;
  font-weight: 700;
  color: #111827;
  line-height: 1.2;
}

.settings-page-title p {
  margin-top: 2px;
  font-size: 12px;
  color: #8b95a8;
}

.settings-page-shell {
  flex: 1;
  min-height: 0;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.settings-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

/* 设置页：侧栏 + 单栏内容（移动端侧栏改为顶部分段） */
.settings-layout {
  flex: 1;
  min-height: 0;
  width: 100%;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  overflow: hidden;
}

.settings-sidebar {
  flex-shrink: 0;
  width: 220px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 12px;
  padding-left: max(12px, env(safe-area-inset-left));
  background: #f4f6f9;
  border-right: 1px solid #e5e7eb;
}

.settings-nav-btn {
  display: flex;
  align-items: center;
  width: 100%;
  margin: 0;
  padding: 11px 14px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: #4b5563;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
  touch-action: manipulation;
}

.settings-nav-btn:hover {
  background: rgba(255, 255, 255, 0.72);
  color: #111827;
}

.settings-nav-btn.is-active {
  background: #fff;
  color: #2563eb;
  border-color: #e5e7eb;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.settings-nav-btn:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.45);
  outline-offset: 2px;
}

.settings-nav-btn-label {
  min-width: 0;
}

.settings-panes {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 14px max(14px, env(safe-area-inset-right)) max(14px, env(safe-area-inset-bottom)) 14px;
}

.settings-pane:not(.is-active) {
  display: none !important;
}

.settings-pane.is-active {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.settings-panel {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #fff;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.settings-panel-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  row-gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid #eef0f3;
  background: #fafbfc;
}

.settings-panel-header h2 {
  font-size: 14px;
  line-height: 1.3;
  font-weight: 600;
  color: #111827;
}

.settings-panel-header p {
  margin-top: 3px;
  font-size: 11px;
  color: #8b95a8;
  word-break: break-all;
}

.settings-primary-btn,
.settings-secondary-btn {
  height: 30px;
  padding: 0 12px;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s, color 0.15s, opacity 0.15s;
}

.settings-primary-btn {
  color: #fff;
  background: #2563eb;
  border: 1px solid #2563eb;
}

.settings-primary-btn:hover {
  background: #1d4ed8;
  border-color: #1d4ed8;
}

.settings-primary-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.settings-secondary-btn {
  color: #374151;
  background: #fff;
  border: 1px solid #d1d5db;
}

.settings-secondary-btn:hover {
  background: #f3f4f6;
}

.settings-textarea {
  display: block;
  width: 100%;
  flex: 1 1 auto;
  min-height: 0;
  padding: 14px;
  border: none;
  outline: none;
  resize: none;
  color: #111827;
  background: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre;
  overflow: auto;
}

.settings-textarea:focus {
  box-shadow: inset 0 0 0 2px rgba(37, 99, 235, 0.18);
}

.settings-status {
  flex-shrink: 0;
  min-height: 30px;
  padding: 7px 14px 9px;
  border-top: 1px solid #eef0f3;
  color: #8b95a8;
  font-size: 12px;
}

.settings-status.ok {
  color: #15803d;
}

.settings-status.error {
  color: #b91c1c;
}

.skills-list,
.extensions-list {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding: 8px;
}

.skill-item,
.extension-item {
  padding: 10px 10px 9px;
  border: 1px solid #edf0f4;
  border-radius: 8px;
  background: #fff;
}

.skill-item + .skill-item,
.extension-item + .extension-item {
  margin-top: 7px;
}

.skill-title-row,
.extension-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  min-width: 0;
}

.skill-name,
.extension-name {
  min-width: 0;
  color: #111827;
  font-size: 13px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.skill-meta,
.extension-meta {
  flex-shrink: 0;
  color: #9ca3af;
  font-size: 10px;
}

.skill-desc {
  margin-top: 5px;
  color: #4b5563;
  font-size: 12px;
  line-height: 1.45;
}

.skill-path {
  margin-top: 6px;
  color: #9ca3af;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.4;
  word-break: break-all;
}

.extension-counts {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 7px;
}

.extension-counts span {
  display: inline-flex;
  align-items: center;
  height: 20px;
  padding: 0 7px;
  border-radius: 999px;
  background: #f3f4f6;
  color: #4b5563;
  font-size: 11px;
  line-height: 1;
}

.extension-details {
  margin-top: 8px;
  border-top: 1px solid #f1f3f6;
  padding-top: 7px;
}

.extension-details > summary {
  cursor: pointer;
  color: #6b7280;
  font-size: 11px;
  user-select: none;
}

.extension-details > summary:hover {
  color: #2563eb;
}

.extension-name-list {
  margin-top: 8px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  font-size: 11px;
  color: #8b95a8;
}

.extension-name-list > div {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  min-width: 0;
}

.extension-name-list code {
  padding: 2px 6px;
  border-radius: 5px;
  background: #f8fafc;
  border: 1px solid #edf0f4;
  color: #374151;
  font-family: var(--font-mono);
  font-size: 10px;
  word-break: break-all;
}

.extension-path {
  margin-top: 8px;
  color: #9ca3af;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.4;
  word-break: break-all;
}

.settings-empty {
  padding: 20px 10px;
  color: #9ca3af;
  font-size: 12px;
  text-align: center;
}

/* ─── 输入区域 ─────────────────────────────────────────────────────── */

#inputArea {
  padding: 10px 16px 12px;
  border-top: 1px solid #f0f0f0;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
}

.input-wrapper {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  max-width: 720px;
  margin: 0 auto;
  background: #f6f7fb;
  border: 1px solid #e5e5e5;
  border-radius: 14px;
  padding: 4px 4px 4px 12px;
  transition: border-color 0.15s;
}

.input-wrapper:focus-within {
  border-color: #2563eb;
  background: #fff;
}

#input {
  flex: 1;
  background: transparent;
  border: none;
  color: #1a1a1a;
  padding: 8px 0;
  font-size: 16px;
  font-family: inherit;
  resize: none;
  outline: none;
  min-height: 24px;
  max-height: 120px;
  line-height: 1.45;
}

#input::placeholder { color: #bbb; }

#sendBtn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #2563eb;
  border: none;
  border-radius: 11px;
  color: #fff;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, opacity 0.15s;
  touch-action: manipulation;
}

#sendBtn:hover { background: #1d4ed8; }
#sendBtn:disabled { background: #d1d5db; cursor: not-allowed; }

/* ─── 移动端适配 ──────────────────────────────────────────────────── */

@media (max-width: 768px) {
  body,
  #app {
    height: var(--app-height);
  }

  #sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
  }

  #sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
  }

  .menu-btn {
    display: flex;
  }

  #header {
    padding: 10px 12px;
    align-items: flex-start;
  }

  .header-trailing {
    max-width: 100%;
    width: 100%;
    flex-basis: 100%;
    margin-left: 0;
    justify-content: flex-start;
    padding-left: 44px;
    box-sizing: border-box;
    flex-wrap: wrap;
  }

  .model-controls {
    width: 100%;
  }

  .model-select {
    width: min(100%, 260px);
    flex: 1 1 180px;
  }

  .session-context-bar:not(.session-context-in-header) {
    padding: 5px 12px 6px;
    font-size: 10px;
  }

  .session-context-in-header {
    font-size: 10px;
  }

  #sessionContextSecondary {
    font-size: 9px;
  }

  #chat {
    padding: 10px 12px 8px;
  }

  .settings-view {
    padding: 12px;
  }

  .settings-page-main {
    padding: 0;
  }

  .settings-page-header {
    align-items: flex-start;
    padding-top: max(12px, env(safe-area-inset-top));
    padding-bottom: 12px;
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
  }

  .settings-layout {
    flex-direction: column;
  }

  .settings-sidebar {
    width: 100%;
    flex-direction: row;
    align-items: stretch;
    gap: 8px;
    padding: 10px max(12px, env(safe-area-inset-left)) 10px max(12px, env(safe-area-inset-right));
    border-right: none;
    border-bottom: 1px solid #e5e7eb;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .settings-sidebar::-webkit-scrollbar {
    height: 0;
    width: 0;
  }

  .settings-nav-btn {
    flex: 1 1 0;
    min-width: 0;
    justify-content: center;
    text-align: center;
    padding: 12px 8px;
    font-size: 13px;
  }

  .settings-panes {
    flex: 1;
    min-height: 0;
    padding: 10px max(10px, env(safe-area-inset-left)) max(12px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-right));
  }

  .settings-textarea {
    font-size: 12px;
  }

  .msg {
    padding: 11px 12px;
    font-size: 16px;
  }

  .msg.user {
    max-width: 88%;
  }

  .msg.assistant {
    padding-left: 0;
  }

  .msg.tool_call,
  .msg.tool_result {
    margin-left: 0;
    font-size: 12px;
  }

  #inputArea {
    position: sticky;
    bottom: 0;
    z-index: 5;
    padding: 8px 10px calc(10px + env(safe-area-inset-bottom));
  }

  .input-wrapper {
    padding: 2px 2px 2px 10px;
  }
}

@media (max-width: 480px) {
  .msg.user {
    max-width: 92%;
    padding: 10px 12px;
    font-size: 16px;
  }

  .msg.assistant {
    font-size: 16px;
    padding: 10px 0;
  }
}

/* ─── 动效偏好 ───────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}