/* 主布局与对话 - 使用设计令牌 */
@import url('variables.css');

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  height: 100vh;
  overflow: hidden;
  color: var(--color-text);
}

.app-layout {
  display: flex;
  height: 100vh;
}

/* ========== 侧边栏 ========== */
.sidebar {
  width: 272px;
  min-width: 272px;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--sidebar-border);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.sidebar-header {
  padding: 18px 14px;
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, #0f766e 100%);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.3);
}

.logo-text {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--sidebar-text);
}

.btn-new-chat {
  width: 100%;
  padding: 12px 14px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background var(--transition-base), transform 0.1s ease;
}

.btn-new-chat:hover {
  background: var(--color-primary-hover);
}

.btn-new-chat:active {
  transform: scale(0.98);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 18px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: var(--text-base);
  border-radius: var(--radius-md);
  margin: 0 10px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: var(--color-text);
}

.nav-item.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
  font-weight: 500;
}

.nav-icon {
  font-size: 18px;
  opacity: 0.9;
}

.nav-section {
  margin-top: 12px;
}

.nav-section-title {
  display: block;
  padding: 8px 18px 6px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.session-list {
  padding: 0 10px 10px;
}

.session-item {
  padding: 10px 14px;
  cursor: pointer;
  font-size: var(--text-base);
  color: var(--color-text);
  border-radius: var(--radius-md);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
  transition: background var(--transition-fast);
}

.session-item:hover {
  background: var(--sidebar-hover);
}

.session-item.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
}

.session-item .session-del {
  padding: 4px 8px;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border: none;
  background: none;
  cursor: pointer;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.session-item .session-del:hover {
  color: var(--color-error);
  background: var(--color-error-bg);
}

.sidebar-footer {
  padding: 14px 18px;
  border-top: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.footer-row {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.footer-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent-light) 100%);
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-username {
  font-size: var(--text-sm);
  color: var(--color-text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.footer-logout {
  display: block;
  margin-top: 8px;
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-logout:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* ========== 主区域 ========== */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--color-bg);
}

.main-header {
  padding: 14px 22px;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

/* Agent 切换器：自定义下拉，替代原生 select */
.agent-switcher {
  position: relative;
}

.agent-switcher-trigger {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: inherit;
  background: var(--color-bg-elevated);
  color: var(--color-text);
  cursor: pointer;
  min-width: 180px;
  max-width: 260px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-fast);
}

.agent-switcher-trigger:hover {
  border-color: var(--color-primary-border);
  background: #fff;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.1);
}

.agent-switcher-trigger:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.agent-switcher-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.agent-switcher-label {
  flex: 1;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.agent-switcher-chevron {
  font-size: 10px;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.agent-switcher.open .agent-switcher-chevron {
  transform: rotate(180deg);
}

.agent-switcher-dropdown {
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  min-width: 100%;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 50;
  padding: 6px 0;
  max-height: 280px;
  overflow-y: auto;
  display: none;
}

.agent-switcher.open .agent-switcher-dropdown {
  display: block;
}

.agent-switcher-item {
  padding: 12px 16px;
  font-size: var(--text-base);
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background var(--transition-fast);
}

.agent-switcher-item:hover {
  background: var(--color-primary-light);
}

.agent-switcher-item.selected {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 500;
}

.agent-switcher-item::before {
  content: '🤖';
  font-size: 16px;
}

.header-settings {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 20px;
  border-radius: var(--radius-md);
  margin-left: auto;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.header-settings:hover {
  background: var(--color-primary-light);
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* ========== 欢迎视图 ========== */
.welcome-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 48px 24px 28px;
}

.welcome-greeting {
  font-size: var(--text-hero);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 36px;
  text-align: center;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.input-block {
  width: 100%;
  max-width: 720px;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: flex-end;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 14px 18px;
  min-height: 58px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.input-wrapper:focus-within {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.input-wrapper textarea {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  font-size: var(--text-md);
  font-family: inherit;
  min-height: 32px;
  max-height: 120px;
  padding: 0;
  margin: 0 10px 0 0;
  color: var(--color-text);
}

.input-wrapper textarea::placeholder {
  color: var(--color-text-muted);
}

.input-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: 8px;
}

.input-action-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  color: var(--color-text-muted);
  font-size: 15px;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.input-action-btn:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.input-send {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-lg);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base), transform 0.1s ease;
}

.input-send:hover {
  background: var(--color-primary-hover);
}

.input-send:active {
  transform: scale(0.95);
}

.tool-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
  justify-content: center;
}

.tool-btn {
  padding: 9px 18px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.tool-btn:hover {
  background: var(--color-surface);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.suggestions {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  width: 100%;
  max-width: 720px;
  margin-top: 32px;
}

.suggestion-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 18px 18px;
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.45;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform 0.15s ease;
}

.suggestion-card:hover {
  border-color: var(--color-primary-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.suggestion-btn {
  align-self: flex-start;
  padding: 6px 14px;
  font-size: var(--text-sm);
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.suggestion-btn:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ========== 对话视图 ========== */
.chat-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.chat-view .messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.msg {
  max-width: 85%;
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: var(--text-base);
  transition: box-shadow var(--transition-fast);
}

.msg.user {
  align-self: flex-end;
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.25);
}

.msg.assistant {
  align-self: flex-start;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
}

.msg.error {
  align-self: flex-start;
  background: var(--color-error-bg);
  border: 1px solid rgba(220, 38, 38, 0.3);
  color: var(--color-error);
}

.msg.thinking {
  color: var(--color-text-muted);
  font-style: italic;
}

.chat-view .input-area {
  padding: 18px 20px;
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
}

.input-row {
  display: flex;
  gap: 14px;
  align-items: flex-end;
}

.input-row textarea {
  flex: 1;
  min-height: 48px;
  max-height: 120px;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: inherit;
  resize: none;
  color: var(--color-text);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.input-row textarea::placeholder {
  color: var(--color-text-muted);
}

.input-row textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.input-row button {
  padding: 14px 22px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-base), transform 0.1s ease;
}

.input-row button:hover {
  background: var(--color-primary-hover);
}

.input-row button:active {
  transform: scale(0.98);
}

.input-row button:disabled {
  background: var(--color-text-muted);
  cursor: not-allowed;
  transform: none;
}

.empty-hint {
  color: var(--color-text-muted);
  text-align: center;
  padding: 48px 24px;
  font-size: var(--text-base);
}

/* ========== 移动端 ========== */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition-base);
  backdrop-filter: blur(2px);
}

.sidebar-overlay.show {
  display: block;
  opacity: 1;
}

@media (min-width: 769px) {
  .sidebar-overlay { display: none !important; }
}

.btn-menu {
  display: none;
  padding: 10px 14px;
  margin: -4px 8px -4px -4px;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.btn-menu:hover {
  background: var(--color-surface);
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    width: 280px;
    max-width: 85vw;
    min-width: 0;
    transform: translateX(-100%);
    transition: transform var(--transition-smooth);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.12);
  }

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

  .main {
    width: 100%;
  }

  .main-header {
    flex-wrap: wrap;
    padding: 12px 14px;
  }

  .welcome-view {
    padding: 28px 16px 20px;
  }

  .welcome-greeting {
    font-size: var(--text-2xl);
    margin-bottom: 28px;
  }

  .suggestions {
    grid-template-columns: 1fr;
  }

  .chat-view .messages {
    padding: 14px;
  }

  .msg {
    max-width: 92%;
  }

  .chat-view .input-area {
    padding: 14px;
  }

  .btn-menu {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

/* ========== Markdown 渲染内容 ========== */
.msg-body {
  line-height: 1.55;
  word-break: break-word;
}

.msg-body > *:first-child { margin-top: 0; }
.msg-body > *:last-child { margin-bottom: 0; }

/* 标题 */
.msg-body h1, .msg-body h2, .msg-body h3,
.msg-body h4, .msg-body h5, .msg-body h6 {
  margin: 16px 0 8px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
}
.msg-body h1 { font-size: var(--text-xl); }
.msg-body h2 { font-size: var(--text-lg); }
.msg-body h3 { font-size: var(--text-md); }

/* 段落 & 列表 */
.msg-body p { margin: 4px 0; }
.msg-body ul, .msg-body ol { margin: 4px 0; padding-left: 22px; }
.msg-body li { margin: 2px 0; }

/* 内联代码 */
.msg-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
}
.msg.user .msg-body code {
  background: rgba(255, 255, 255, 0.2);
}

/* 代码块容器 */
.msg-body .code-block-wrapper {
  position: relative;
  margin: 12px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: #f6f8fa;
}
.msg.user .msg-body .code-block-wrapper {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
}

/* 代码块头部：语言 + 复制按钮 */
.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 14px;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: rgba(0, 0, 0, 0.04);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
}
.msg.user .code-block-header {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.7);
}

.code-copy-btn {
  border: none;
  background: none;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-family: inherit;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.code-copy-btn:hover {
  background: rgba(0, 0, 0, 0.06);
  color: var(--color-text);
}
.msg.user .code-copy-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}
.code-copy-btn.copied {
  color: var(--color-success);
}

/* 代码块 pre */
.msg-body pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: 1.5;
  background: transparent !important;
}
.msg-body pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

/* 表格 */
.msg-body table {
  border-collapse: collapse;
  margin: 12px 0;
  width: 100%;
  font-size: var(--text-sm);
}
.msg-body th, .msg-body td {
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  text-align: left;
}
.msg-body th {
  background: var(--color-surface);
  font-weight: 600;
}
.msg.user .msg-body th {
  background: rgba(255, 255, 255, 0.12);
}
.msg.user .msg-body td {
  border-color: rgba(255, 255, 255, 0.15);
}

/* 引用 */
.msg-body blockquote {
  margin: 12px 0;
  padding: 8px 16px;
  border-left: 3px solid var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-secondary);
}
.msg.user .msg-body blockquote {
  border-left-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
}

/* 链接 */
.msg-body a {
  color: var(--color-link);
  text-decoration: none;
}
.msg-body a:hover {
  text-decoration: underline;
  color: var(--color-link-hover);
}
.msg.user .msg-body a {
  color: #93e8de;
}
.msg.user .msg-body a:hover {
  color: #fff;
}

/* 分隔线 */
.msg-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 16px 0;
}
.msg.user .msg-body hr {
  border-top-color: rgba(255, 255, 255, 0.25);
}

/* 加粗 / 斜体 */
.msg-body strong { font-weight: 600; }
.msg-body em { font-style: italic; }

/* 图片 */
.msg-body img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: 8px 0;
}

/* 流式光标动画 */
@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}
.streaming-cursor::after {
  content: '▊';
  animation: blink-cursor 0.8s ease infinite;
  font-size: 0.85em;
  color: var(--color-text-muted);
  margin-left: 1px;
}
.msg.user .streaming-cursor::after {
  color: rgba(255, 255, 255, 0.7);
}

/* 移动端代码块 */
@media (max-width: 768px) {
  .msg-body pre {
    font-size: var(--text-xs);
    padding: 10px 12px;
  }
}

/* ========== 代码块运行功能 ========== */

/* 按钮容器 */
.code-block-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 编辑按钮 */
.code-edit-btn {
  border: none;
  background: none;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-family: inherit;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.code-edit-btn:hover {
  background: rgba(0, 0, 0, 0.06);
  color: var(--color-text);
}
.msg.user .code-edit-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

/* 取消编辑按钮 */
.code-edit-cancel-btn {
  border: none;
  background: none;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-family: inherit;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.code-edit-cancel-btn:hover {
  background: rgba(0, 0, 0, 0.06);
  color: var(--color-text);
}
.msg.user .code-edit-cancel-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

/* 编辑模式 textarea */
.code-edit-textarea {
  display: block;
  width: 100%;
  height: auto;
  overflow: hidden;
  padding: 14px 16px;
  margin: 0;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-text);
  background: #fff;
  tab-size: 4;
}
.msg.user .code-edit-textarea {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

/* 编辑模式下代码块边框高亮 */
.code-block--editing {
  border-color: var(--color-primary) !important;
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

/* 运行按钮 */
.code-run-btn {
  border: none;
  background: var(--color-primary);
  color: #fff;
  font-size: var(--text-xs);
  font-family: inherit;
  cursor: pointer;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: background var(--transition-fast), opacity var(--transition-fast);
}
.code-run-btn:hover {
  background: var(--color-primary-hover);
}
.code-run-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.msg.user .code-run-btn {
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
}
.msg.user .code-run-btn:hover {
  background: rgba(255, 255, 255, 0.4);
}

/* 输出面板 */
.code-run-output {
  margin: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  border-top: 1px solid var(--color-border);
  background: #f0fdf4;
  max-height: 300px;
  overflow-y: auto;
}
.msg.user .code-run-output {
  border-top-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.1);
}

/* 加载状态 */
.code-run-output--loading {
  color: var(--color-text-muted);
  background: var(--color-surface);
  animation: run-pulse 1.2s ease-in-out infinite;
}
@keyframes run-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* 标准输出 */
.code-run-stdout {
  color: var(--color-text);
}

/* 错误输出 */
.code-run-stderr {
  color: #b91c1c;
}

/* 错误信息 */
.code-run-error {
  color: var(--color-error);
  font-weight: 500;
}

/* 图表输出 */
.code-run-image {
  padding: 8px 0;
  text-align: center;
}
.code-run-image img {
  max-width: 100%;
  max-height: 400px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fff;
}

@media (max-width: 768px) {
  .code-run-output {
    font-size: var(--text-xs);
    padding: 8px 10px;
  }
  .code-edit-textarea {
    font-size: var(--text-xs);
    padding: 10px 12px;
    min-height: 60px;
  }
}

/* ========== 深度思考卡片 ========== */
.reasoning-card {
  margin: 8px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  overflow: hidden;
}

.reasoning-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.reasoning-header:hover {
  background: rgba(0, 0, 0, 0.03);
}

.reasoning-icon {
  font-size: 14px;
  flex-shrink: 0;
}

.reasoning-label {
  flex: 1;
  font-weight: 500;
}

.reasoning-toggle {
  font-size: 10px;
  transition: transform var(--transition-base);
  color: var(--color-text-muted);
}

.reasoning-card.open .reasoning-toggle {
  transform: rotate(180deg);
}

.reasoning-body {
  display: none;
  padding: 0 12px 10px;
  border-top: 1px solid var(--color-border);
}

.reasoning-card.open .reasoning-body {
  display: block;
}

.reasoning-content {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  padding-top: 8px;
}

/* ========== 工具调用卡片 ========== */
.tool-call-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  margin: 4px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.tool-call-card.loading {
  border-color: var(--color-primary-border);
  background: var(--color-primary-light);
}

.tool-call-card.done {
  border-color: var(--color-border);
  background: var(--color-bg-elevated);
}

.tool-call-icon {
  font-size: 14px;
  flex-shrink: 0;
}

.tool-call-name {
  flex: 1;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text);
}

.tool-call-status {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.tool-call-card.loading .tool-call-status {
  color: var(--color-primary);
}

@keyframes tool-call-spin {
  0% { opacity: 1; }
  50% { opacity: 0.4; }
  100% { opacity: 1; }
}

.tool-call-card.loading .tool-call-status {
  animation: tool-call-spin 1.2s ease-in-out infinite;
}

/* ========== 确认卡片 ========== */

.confirmation-card {
  margin: 8px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  overflow: hidden;
  transition: opacity 0.2s ease, border-color 0.2s ease;
}

.confirmation-card[data-variant="danger"] {
  border-color: rgba(220, 38, 38, 0.4);
  background: #fef2f2;
}

.confirmation-card[data-variant="warning"] {
  border-color: rgba(234, 88, 12, 0.4);
  background: #fff7ed;
}

.confirmation-card[data-variant="info"] {
  border-color: var(--color-primary-border);
  background: var(--color-primary-light);
}

.confirmation-card.answered {
  opacity: 0.7;
  pointer-events: none;
}

.confirmation-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-size: var(--text-sm, 13px);
  font-weight: 600;
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.02);
  border-bottom: 1px solid var(--color-border);
}

.confirmation-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.confirmation-title {
  flex: 1;
}

.confirmation-body {
  padding: 12px 14px;
}

.confirmation-message {
  margin: 0 0 12px;
  font-size: var(--text-sm, 13px);
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.confirmation-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.confirmation-option-btn {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  font-size: var(--text-sm, 13px);
  font-family: inherit;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.confirmation-option-btn:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-border);
  color: var(--color-primary);
}

.confirmation-option-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.confirmation-input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.confirmation-input {
  flex: 1;
  min-height: 36px;
  max-height: 80px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm, 13px);
  font-family: inherit;
  resize: none;
  color: var(--color-text);
  outline: none;
  background: var(--color-bg);
  transition: border-color 0.15s ease;
}

.confirmation-input:focus {
  border-color: var(--color-primary);
}

.confirmation-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.confirmation-send-btn {
  padding: 8px 14px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm, 13px);
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease;
}

.confirmation-send-btn:hover {
  background: var(--color-primary-hover, #2563eb);
}

.confirmation-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.confirmation-response {
  margin-top: 8px;
  padding: 8px 12px;
  background: var(--color-primary-light);
  border-radius: var(--radius-sm, 4px);
  font-size: var(--text-sm, 13px);
  color: var(--color-primary);
  font-weight: 500;
}

@media (max-width: 768px) {
  .confirmation-options {
    flex-direction: column;
  }
  .confirmation-option-btn {
    width: 100%;
    text-align: center;
  }
}

/* ========== 排队状态 ========== */

.queue-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  margin: 8px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  font-size: var(--text-sm, 13px);
  color: var(--color-text-secondary);
}

.queue-icon {
  font-size: 18px;
  flex-shrink: 0;
  animation: queue-pulse 1.5s ease-in-out infinite;
}

.queue-text {
  flex: 1;
}

.queue-text strong {
  color: var(--color-primary);
}

.queue-cancel-btn {
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm, 4px);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}

.queue-cancel-btn:hover {
  background: rgba(220, 38, 38, 0.08);
  color: #dc2626;
  border-color: rgba(220, 38, 38, 0.3);
}

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