/* ============================================
   Harloops — Apple 极简风格
   黑白双主题 · CSS 变量驱动
   参考 Simona 的界面设计灵感
   ============================================ */

/* ─── 主题变量 ─── */
:root,
[data-theme="light"] {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F7;
  --bg-tertiary: #FAFAFA;
  --bg-navbar: rgba(255, 255, 255, 0.72);
  --bg-input: #FFFFFF;
  --bg-hover: #F5F5F7;
  --bg-code: #F5F5F7;
  --bg-message-user: #F02020;
  --bg-message-ai: #F5F5F7;
  --bg-sidebar: #FAFAFA;
  --bg-modal: #FFFFFF;

  --text-primary: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #86868B;
  --text-on-user: #FFFFFF;

  --btn-primary-bg: #1D1D1F;
  --btn-primary-text: #FFFFFF;
  --btn-secondary-bg: #E8E8ED;
  --btn-secondary-text: #1D1D1F;
  --btn-icon-bg: transparent;
  --btn-icon-hover: #F5F5F7;
  --btn-icon-text: #86868B;

  --border-primary: #D2D2D7;
  --border-secondary: #E8E8ED;
  --border-focus: #007AFF;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.08);

  --brand: #F02020;
  --accent: #007AFF;
  --success: #34C759;
  --warning: #FF9500;
  --danger: #FF3B30;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-full: 999px;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
}

[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #1C1C1E;
  --bg-tertiary: #2C2C2E;
  --bg-navbar: rgba(0, 0, 0, 0.72);
  --bg-input: #1C1C1E;
  --bg-hover: #1C1C1E;
  --bg-code: #1C1C1E;
  --bg-message-user: #F02020;
  --bg-message-ai: #1C1C1E;
  --bg-sidebar: #0A0A0A;
  --bg-modal: #1C1C1E;

  --text-primary: #F5F5F7;
  --text-secondary: #86868B;
  --text-tertiary: #86868B;
  --text-on-user: #FFFFFF;

  --btn-primary-bg: #FFFFFF;
  --btn-primary-text: #000000;
  --btn-secondary-bg: #2C2C2E;
  --btn-secondary-text: #F5F5F7;
  --btn-icon-bg: transparent;
  --btn-icon-hover: #1C1C1E;
  --btn-icon-text: #86868B;

  --border-primary: #38383A;
  --border-secondary: #2C2C2E;
  --border-focus: #0A84FF;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);

  --brand: #F02020;
  --accent: #0A84FF;
  --success: #30D158;
  --warning: #FF9F0A;
  --danger: #FF453A;
}

/* ─── 基础 ─── */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
  overflow: hidden;
}
*, *::before, *::after { transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease; }
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-tertiary); border-radius: 3px; opacity: 0.3; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ─── 导航栏 ─── */
.navbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 20px;
  background: var(--bg-navbar);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-secondary);
}
.nav-left { display: flex; align-items: center; gap: 10px; }
.nav-logo { width: 28px; height: auto; border-radius: 4px; }
.nav-brand { font-weight: 700; font-size: 18px; letter-spacing: -0.3px; color: var(--text-primary); }
.nav-center { flex: 1; display: flex; justify-content: center; }
.model-selector {
  appearance: none;
  background: var(--bg-secondary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-full);
  padding: 6px 36px 6px 16px; font-size: 13px;
  color: var(--text-secondary); cursor: pointer;
  font-family: var(--font-family);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2386868B' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
}
.nav-right { display: flex; align-items: center; gap: 8px; }
.nav-btn {
  background: var(--btn-icon-bg); border: none;
  border-radius: var(--radius-sm); padding: 8px; cursor: pointer;
  color: var(--btn-icon-text);
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, transform 0.2s;
}
.nav-btn:hover { background: var(--btn-icon-hover); }
.nav-btn:active { transform: scale(0.95); }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* ─── 主布局 ─── */
.main-layout { display: flex; height: calc(100vh - 57px); }

/* ─── 侧边栏 ─── */
.sidebar {
  width: 240px; background: var(--bg-sidebar);
  border-right: 1px solid var(--border-secondary);
  display: flex; flex-direction: column;
  transition: width 0.3s ease, transform 0.3s ease;
  overflow: hidden; flex-shrink: 0;
}
.sidebar.collapsed { width: 0; border-right: none; }

/* 侧边栏遮罩（仅移动端） */
.sidebar-overlay {
  display: none; position: fixed; top: 57px; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.4); z-index: 150;
  opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.sidebar-overlay.visible { opacity: 1; pointer-events: auto; }

/* 侧边栏切换按钮 */
.sidebar-toggle { display: flex; }
.new-chat-btn {
  margin: 16px; padding: 10px 16px;
  background: var(--btn-primary-bg); color: var(--btn-primary-text);
  border: none; border-radius: var(--radius-full);
  font-size: 14px; font-weight: 500; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  transition: transform 0.2s, box-shadow 0.2s;
  font-family: var(--font-family);
}
.new-chat-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* 模式切换器（编排/定时/开发）— iOS 分段控件风格 */
.mode-switcher {
  display: flex; margin: 12px 16px 8px; gap: 2px;
  background: var(--bg-secondary); border-radius: var(--radius-full); padding: 3px;
}
.mode-btn {
  flex: 1; padding: 7px 12px; border: none; background: transparent;
  border-radius: var(--radius-full); font-size: 13px; font-weight: 500;
  color: var(--text-tertiary); cursor: pointer; font-family: var(--font-family);
  transition: color 0.2s, background 0.2s, box-shadow 0.2s;
  display: flex; align-items: center; justify-content: center; gap: 5px;
}
.mode-btn-icon { flex-shrink: 0; }
.mode-btn:hover { color: var(--text-secondary); }
.mode-btn.active {
  background: var(--bg-primary); color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* Work 模式专属菜单（自动任务/模板库/连接应用/我的文件） */
.work-menu {
  flex-direction: column; gap: 2px;
  margin: 0 16px 8px; padding: 6px;
  background: var(--bg-secondary); border-radius: var(--radius-md);
}
.work-menu-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 8px 10px; border: none; background: none;
  border-radius: var(--radius-sm); font-size: 13px; font-weight: 500;
  color: var(--text-secondary); cursor: pointer;
  font-family: var(--font-family); text-align: left;
  transition: background 0.15s, color 0.15s;
}
.work-menu-item svg { color: var(--text-tertiary); flex-shrink: 0; transition: color 0.15s; }
.work-menu-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.work-menu-item:hover svg { color: var(--text-primary); }

.sidebar-search { padding: 0 16px 12px; }
.search-input {
  width: 100%; padding: 8px 12px;
  background: var(--bg-secondary); border: 1px solid var(--border-secondary);
  border-radius: var(--radius-full); font-size: 13px;
  color: var(--text-primary); outline: none; font-family: var(--font-family);
}
.search-input:focus { border-color: var(--accent); }
.search-input::placeholder { color: var(--text-tertiary); }
.session-list { flex: 1; overflow-y: auto; padding: 0 8px; }
.session-item {
  padding: 10px 12px; border-radius: var(--radius-sm); cursor: pointer;
  margin-bottom: 2px; font-size: 13px; color: var(--text-secondary);
  transition: background 0.2s; display: flex; align-items: center; gap: 8px;
}
.session-item > span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; flex: 1; }
.session-item:hover { background: var(--bg-hover); }
.session-item.active { background: var(--bg-hover); color: var(--text-primary); }
.session-item .session-del {
  margin-left: auto; opacity: 0; background: none; border: none;
  color: var(--text-tertiary); cursor: pointer; font-size: 16px; padding: 0 4px;
  transition: opacity 0.2s; flex-shrink: 0;
}
.session-item:hover .session-del { opacity: 1; }
.sidebar-footer { position: relative; padding: 0; border-top: 1px solid var(--border-secondary); overflow: visible; }
.user-center-btn { display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px 16px; background: none; border: none; cursor: pointer; font-family: var(--font-family); color: var(--text-secondary); transition: background 0.2s; }
.user-center-btn:hover { background: var(--bg-hover); }
.user-avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: contain; flex-shrink: 0; }
.user-name { flex: 1; text-align: left; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-menu { position: absolute; bottom: 100%; left: 8px; width: 120px; background: var(--bg-modal); border: 1px solid var(--border-secondary); border-radius: var(--radius-md) !important; box-shadow: var(--shadow-lg); overflow: hidden; z-index: 200; opacity: 0; transform: translateY(8px); pointer-events: none; transition: opacity 0.2s ease, transform 0.2s ease; }
.user-menu.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
.user-menu-item { display: flex; align-items: center; gap: 8px; width: 100%; padding: 10px 14px; background: none; border: none; font-size: 13px; color: var(--text-primary); cursor: pointer; font-family: var(--font-family); text-align: left; transition: background 0.15s; }
.user-menu-item svg { color: var(--text-secondary); flex-shrink: 0; transition: color 0.15s; }
.user-menu-item:hover svg { color: var(--text-primary); }
.user-menu-item:hover { background: var(--bg-hover); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); }
.status-dot.busy { background: var(--warning); }
.status-dot.error { background: var(--danger); }

/* ─── 聊天主区 ─── */
.chat-main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.chat-container { flex: 1; overflow-y: auto; scroll-behavior: smooth; }

/* 欢迎屏 */
.welcome-screen {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 100%; padding: 24px; text-align: center; overflow-y: auto;
}
.welcome-logo img { width: 56px; height: auto; margin-bottom: 12px; }
.welcome-screen h1 { font-size: 36px; font-weight: 800; letter-spacing: -1px; color: var(--text-primary); }
.welcome-screen > p { font-size: 15px; color: var(--text-tertiary); margin-top: 8px; }
.welcome-cards {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
  margin: 16px auto 0; max-width: 820px;
}
.chat-main:not(.is-empty) .welcome-cards { display: none; }
.welcome-card {
  background: var(--bg-secondary); border-radius: var(--radius-md);
  padding: 14px 16px; cursor: pointer; text-align: left;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex; align-items: center; gap: 10px;
}
.welcome-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.card-icon { font-size: 20px; flex-shrink: 0; }
.card-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }

/* 消息区 */
.messages { padding: 20px 0; max-width: 820px; margin: 0 auto; }
.message { display: flex; gap: 12px; padding: 16px 24px; margin-bottom: 4px; }
.message.user { flex-direction: row-reverse; }
.message-avatar {
  width: 32px; height: 32px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; flex-shrink: 0;
}
.message.ai .message-avatar { background: transparent; }
.message-bubble {
  border-radius: var(--radius-md);
  padding: 12px 16px;
  max-width: 100%;
  word-break: break-word;
  flex: 1;
  min-width: 0;
}
.message.user .message-bubble {
  background: var(--bg-secondary);
  flex: 0 1 auto;
  max-width: 80%;
}
.message.ai .message-bubble {
  background: var(--bg-tertiary);
}
.message-bubble p { margin-bottom: 8px; line-height: 1.7; }
.message-bubble p:last-child { margin-bottom: 0; }
.message-bubble code { font-family: var(--font-mono); font-size: 0.875em; background: var(--bg-code); padding: 2px 6px; border-radius: 4px; }
.message-bubble pre { background: var(--bg-code); border-radius: var(--radius-md); padding: 16px; overflow-x: auto; margin: 8px 0; }
.message-bubble pre code { background: none; padding: 0; font-size: 13px; }
.message-bubble ul, .message-bubble ol { padding-left: 24px; margin-bottom: 8px; }
.message-bubble h1, .message-bubble h2, .message-bubble h3 { margin: 16px 0 8px; font-weight: 700; }
.message-bubble h1 { font-size: 1.3em; }
.message-bubble h2 { font-size: 1.2em; }
.message-bubble h3 { font-size: 1.1em; }
.message-bubble blockquote { border-left: 3px solid var(--border-primary); padding-left: 12px; color: var(--text-secondary); margin: 8px 0; }
.message-bubble table { border-collapse: collapse; width: 100%; margin: 8px 0; }
.message-bubble th, .message-bubble td { border: 1px solid var(--border-secondary); padding: 6px 12px; text-align: left; }

/* 工具调用卡片 */
.tool-card {
  background: var(--bg-secondary); border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md); padding: 12px 16px; margin: 8px 0; font-size: 13px;
}
.tool-card-header { display: flex; align-items: center; gap: 8px; font-weight: 600; color: var(--text-secondary); }
.tool-card-icon { font-size: 16px; }
.tool-card-body {
  margin-top: 8px; color: var(--text-tertiary);
  font-family: var(--font-mono); font-size: 12px;
  white-space: pre-wrap; max-height: 200px; overflow-y: auto;
}

/* ─── 产物卡片（消息内嵌 + 面板列表） ─── */
.artifact-card {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-secondary); border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md); padding: 12px 14px; margin: 8px 0;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.artifact-card:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.artifact-icon { font-size: 20px; flex-shrink: 0; }
.artifact-info { flex: 1; min-width: 0; }
.artifact-title { font-size: 14px; font-weight: 600; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.artifact-meta { font-size: 12px; color: var(--text-tertiary); margin-top: 2px; }
.artifact-actions { display: flex; gap: 4px; flex-shrink: 0; }
.artifact-btn {
  background: var(--btn-icon-bg); border: 1px solid var(--border-secondary);
  border-radius: var(--radius-sm); padding: 6px 10px; cursor: pointer;
  font-size: 14px; color: var(--text-secondary); transition: all 0.2s;
}
.artifact-btn:hover { background: var(--bg-hover); color: var(--text-primary); border-color: var(--accent); }

/* ─── 产物面板（右侧滑出） ─── */
.artifacts-panel {
  width: 320px; background: var(--bg-sidebar);
  border-left: 1px solid var(--border-secondary);
  display: flex; flex-direction: column; flex-shrink: 0;
  overflow: hidden;
}
.artifacts-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--border-secondary);
}
.artifacts-header h2 { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.artifacts-close { background: none; border: none; color: var(--text-tertiary); cursor: pointer; padding: 4px; border-radius: var(--radius-sm); display: flex; }
.artifacts-close:hover { background: var(--bg-hover); color: var(--text-primary); }
.artifacts-list { flex: 1; overflow-y: auto; padding: 12px; }
.artifacts-empty { text-align: center; color: var(--text-tertiary); font-size: 14px; padding: 40px 0; }

/* ─── 产物查看弹窗 ─── */
.artifact-viewer-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0,0,0,0.5); backdrop-filter: blur(4px);
  z-index: 2000; display: flex; align-items: center; justify-content: center;
}
.artifact-viewer {
  background: var(--bg-modal); border-radius: var(--radius-lg);
  width: 90%; max-width: 900px; height: 85vh;
  display: flex; flex-direction: column; overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.artifact-viewer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; border-bottom: 1px solid var(--border-secondary);
}
.artifact-viewer-title { font-size: 16px; font-weight: 700; color: var(--text-primary); }
.artifact-viewer-actions { display: flex; gap: 8px; }
.artifact-viewer-btn {
  background: var(--btn-secondary-bg); color: var(--btn-secondary-text);
  border: none; border-radius: var(--radius-sm); padding: 8px 16px;
  font-size: 13px; font-weight: 500; cursor: pointer; font-family: var(--font-family);
  transition: transform 0.2s;
}
.artifact-viewer-btn:hover { transform: translateY(-1px); }
.artifact-viewer-body { flex: 1; overflow: auto; padding: 0; }
.artifact-viewer-code { margin: 0; padding: 20px 24px; background: var(--bg-code); font-family: var(--font-mono); font-size: 13px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.artifact-viewer-loading, .artifact-viewer-error { text-align: center; color: var(--text-tertiary); font-size: 14px; padding: 60px 0; }

/* 产物按钮角标 */
#artifactsBtn { position: relative; }
.artifacts-badge {
  position: absolute; top: 2px; right: 2px;
  background: var(--brand); color: #fff; font-size: 10px; font-weight: 700;
  border-radius: 999px; min-width: 16px; height: 16px;
  display: flex; align-items: center; justify-content: center; padding: 0 4px;
}

/* 打字指示器 */
.typing-indicator { display: flex; gap: 4px; padding: 8px 0; }
.typing-indicator span {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-tertiary); animation: typing 1.4s infinite ease-in-out;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing { 0%, 60%, 100% { transform: scale(0.8); opacity: 0.4; } 30% { transform: scale(1.2); opacity: 1; } }

/* ─── 思考过程块（自定义 toggle，支持平滑动画） ─── */
.thinking-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-bottom: 12px;
  overflow: hidden;
}
.thinking-header {
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  user-select: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: margin-bottom 0.3s ease;
}
.thinking-header::before {
  content: '▶';
  font-size: 9px;
  transition: transform 0.3s ease;
  display: inline-block;
}
.thinking-block.expanded .thinking-header::before { transform: rotate(90deg); }
.thinking-block.expanded .thinking-header { margin-bottom: 8px; }

.thinking-text {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-tertiary);
  white-space: pre-wrap;
  word-break: break-word;
  font-style: italic;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding-top 0.3s ease, border-top-width 0.3s ease;
  border-top: 0 solid var(--border-secondary);
  padding-top: 0;
}

/* 流式输出时：无高度限制，完整显示，无动画 */
.thinking-block.streaming .thinking-text {
  max-height: none;
  overflow-y: hidden;
  transition: none;
  border-top-width: 1px;
  border-top-style: dashed;
  padding-top: 8px;
}

/* 完成后用户手动展开：可滚动，合理高度，带动画 */
.thinking-block.expanded .thinking-text {
  max-height: 60vh;
  overflow-y: auto;
  border-top-width: 1px;
  border-top-style: dashed;
  padding-top: 8px;
}

/* ─── 输入区 ─── */
.input-area { padding: 12px 24px 20px; background: transparent; }
.input-wrapper {
  display: flex; align-items: flex-end; gap: 8px;
  background: var(--bg-input); border: 1px solid var(--border-secondary);
  border-radius: var(--radius-xl); padding: 8px 8px 8px 16px;
  max-width: 820px; margin: 0 auto;
  box-shadow: var(--shadow-md);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.input-wrapper:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1); }
.input-wrapper.drag-over { border-color: var(--accent); background: var(--bg-secondary); box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15); }
.message-input {
  flex: 1; border: none; background: none; outline: none; resize: none;
  font-size: 15px; line-height: 1.5; color: var(--text-primary);
  font-family: var(--font-family); max-height: 200px; padding: 4px 0;
}
.message-input::placeholder { color: var(--text-tertiary); }
.send-btn {
  background: var(--btn-primary-bg); color: var(--btn-primary-text);
  border: none; border-radius: 50%; width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: transform 0.2s, opacity 0.2s; flex-shrink: 0;
}
.send-btn:hover { transform: scale(1.05); }
.send-btn:active { transform: scale(0.95); }
.send-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.send-btn.stop { background: var(--danger); }
.send-btn.stop:hover { background: var(--danger); opacity: 0.85; }
.input-toolbar { display: flex; align-items: center; justify-content: space-between; max-width: 820px; margin: 8px auto 0; padding: 0 4px; }
.tool-toggle {
  display: flex; align-items: center; gap: 6px;
  background: none; border: 1px solid var(--border-secondary);
  border-radius: var(--radius-full); padding: 4px 12px;
  font-size: 12px; color: var(--text-tertiary); cursor: pointer;
  font-family: var(--font-family); transition: all 0.2s;
}
.tool-toggle.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.tool-toggle:hover { color: var(--text-secondary); }
.tool-toggle.active:hover { color: #fff; }
.char-count { font-size: 11px; color: var(--text-tertiary); }
#settingsBtn { display: none !important; }
#newChatNavBtn { display: none; }
.chat-main.is-empty { justify-content: center; }
.chat-main.is-empty .chat-container { flex: 0 1 auto; }
.chat-main.is-empty .welcome-screen { height: auto; padding: 20px 24px; }

/* ─── 图片附件 ─── */
.attach-btn {
  display: flex; align-items: center; justify-content: center;
  background: none; border: 1px solid var(--border-secondary);
  border-radius: var(--radius-full); padding: 4px 10px;
  color: var(--text-tertiary); cursor: pointer; transition: all 0.2s;
}
.attach-btn:hover { color: var(--text-secondary); border-color: var(--text-tertiary); }
#attachPreview { display: flex; gap: 8px; padding: 0 4px 8px; flex-wrap: wrap; max-width: 820px; margin: 0 auto; }
.attach-item { position: relative; width: 56px; height: 56px; border-radius: 10px; overflow: hidden; border: 1px solid var(--border-secondary); }
.attach-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.attach-remove {
  position: absolute; top: 2px; right: 2px; width: 18px; height: 18px;
  border-radius: 50%; background: rgba(0,0,0,0.65); color: #fff; border: none;
  font-size: 11px; line-height: 1; cursor: pointer; display: flex; align-items: center; justify-content: center;
}
.message-bubble img {
  border-radius: 8px;
  margin: 4px 0;
  max-width: 100%;
  max-height: 420px;      /* 限制高度，防止撑出气泡 */
  width: auto;
  height: auto;
  object-fit: contain;    /* 完整显示，不裁切 */
  display: block;
}
/* 用户消息中的附件缩略图 */
.msg-attach { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.msg-attach img {
  max-width: 200px; max-height: 200px;
  border-radius: 10px; border: 1px solid var(--border-secondary);
  object-fit: cover; display: block;
}
.msg-file { display: inline-flex; align-items: center; gap: 4px; background: var(--bg-secondary); border-radius: 8px; padding: 4px 8px; font-size: 12px; color: var(--text-secondary); }
.attach-file { position: relative; display: flex; align-items: center; gap: 6px; background: var(--bg-secondary); border: 1px solid var(--border-secondary); border-radius: var(--radius-full); padding: 4px 22px 4px 10px; font-size: 12px; color: var(--text-secondary); max-width: 220px; }
.attach-file .attach-remove { position: absolute; top: 50%; right: 4px; transform: translateY(-50%); width: 16px; height: 16px; font-size: 10px; background: var(--bg-hover); color: var(--text-tertiary); }
.attach-file .attach-remove:hover { background: var(--danger); color: #fff; }
.attach-file-icon { font-size: 14px; flex-shrink: 0; }
.attach-file-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.attach-file-size { color: var(--text-tertiary); font-size: 11px; flex-shrink: 0; }
.nav-left .status-dot { width: 6px; height: 6px; margin-left: -4px; }

/* ─── 图片生成占位元素 ─── */
.img-gen-placeholder {
  position: relative;
  width: 100%; max-width: 420px; height: 220px;
  margin-top: 10px; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--border-secondary);
  background: var(--bg-secondary);
}
.img-gen-shimmer {
  position: absolute; inset: 0;
  background: linear-gradient(100deg,
    transparent 20%, rgba(255,255,255,0.08) 40%,
    rgba(255,255,255,0.16) 50%, rgba(255,255,255,0.08) 60%, transparent 80%);
  background-size: 200% 100%;
  animation: imgGenShimmer 1.8s linear infinite;
}
@keyframes imgGenShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.img-gen-body {
  position: relative; height: 100%;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  color: var(--text-tertiary); font-size: 13px;
}
.img-gen-icon { font-size: 18px; animation: imgGenPulse 1.6s ease-in-out infinite; }
@keyframes imgGenPulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.15); opacity: 1; }
}
.img-gen-dots { display: inline-flex; gap: 3px; margin-left: 2px; }
.img-gen-dots i {
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--text-tertiary);
  animation: imgGenDot 1.2s ease-in-out infinite;
}
.img-gen-dots i:nth-child(2) { animation-delay: 0.2s; }
.img-gen-dots i:nth-child(3) { animation-delay: 0.4s; }
@keyframes imgGenDot {
  0%, 60%, 100% { opacity: 0.25; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}

/* ─── 模态弹窗 ─── */
.modal-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.4); backdrop-filter: blur(4px);
  z-index: 1000; display: flex; align-items: center; justify-content: center;
}
.modal {
  background: var(--bg-modal); border-radius: var(--radius-lg);
  width: 90%; max-width: 560px; max-height: 80vh;
  overflow: hidden; display: flex; flex-direction: column;
  box-shadow: var(--shadow-lg);
}
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border-secondary); }
.modal-header h2 { font-size: 18px; font-weight: 700; }
.modal-close { background: none; border: none; color: var(--text-tertiary); cursor: pointer; padding: 4px; border-radius: var(--radius-sm); display: flex; }
.modal-close:hover { background: var(--bg-hover); }
.modal-body { padding: 24px; overflow-y: auto; }
.settings-tabs { display: flex; gap: 4px; margin-bottom: 24px; border-bottom: 1px solid var(--border-secondary); }
.settings-tabs .tab {
  background: none; border: none; padding: 8px 16px;
  font-size: 13px; color: var(--text-tertiary); cursor: pointer;
  border-bottom: 2px solid transparent; font-family: var(--font-family); margin-bottom: -1px;
}
.settings-tabs .tab.active { color: var(--text-primary); border-bottom-color: var(--accent); }
.tab-content { display: none; }
.tab-content.active { display: block; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.form-input {
  width: 100%; padding: 10px 14px;
  background: var(--bg-input); border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm); font-size: 14px;
  color: var(--text-primary); outline: none; font-family: var(--font-family);
}
.form-input:focus { border-color: var(--accent); }
.form-textarea {
  width: 100%; padding: 10px 14px;
  background: var(--bg-input); border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm); font-size: 13px;
  color: var(--text-primary); outline: none;
  font-family: var(--font-mono); resize: vertical;
}
.form-textarea:focus { border-color: var(--accent); }
.btn-primary {
  background: var(--btn-primary-bg); color: var(--btn-primary-text);
  border: none; border-radius: var(--radius-full);
  padding: 10px 24px; font-size: 14px; font-weight: 500;
  cursor: pointer; font-family: var(--font-family);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* About */
.about-section { text-align: center; padding: 20px; }
.about-logo { width: 56px; margin: 0 auto 12px; }
.about-section h3 { font-size: 20px; font-weight: 700; }
.about-section p { color: var(--text-secondary); font-size: 14px; margin-top: 4px; }
.about-desc { color: var(--text-tertiary) !important; font-size: 12px !important; margin-top: 12px !important; }
.about-author { color: var(--text-tertiary) !important; font-size: 12px !important; margin-top: 8px !important; }

/* ─── 响应式 ─── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed; top: 57px; left: 0; bottom: 0; z-index: 200;
    width: 240px; transform: translateX(0);
  }
  .sidebar.collapsed { width: 240px; transform: translateX(-100%); }
  .sidebar-overlay { display: block; }
  .new-chat-btn { display: none; }
  #newChatNavBtn { display: flex; }
  .welcome-screen { padding: 16px; justify-content: flex-start; }
  .welcome-screen h1 { font-size: 26px; }
  .welcome-logo img { width: 44px; margin-bottom: 8px; }
  .welcome-screen > p { font-size: 13px; }
  .welcome-cards { grid-template-columns: repeat(2, 1fr); gap: 8px; margin-top: 20px; }
  .welcome-card { padding: 12px; }
  .card-icon { font-size: 18px; }
  .card-title { font-size: 13px; }
  .messages { padding: 16px; }
  .message { padding: 12px 16px; }
  .input-area { padding: 12px 16px 16px; }
}
::selection { background: var(--accent); color: #fff; }

/* ─── 编排模式（Drawflow 画布）─── */
.orchestrate-view { display: flex; flex-direction: column; flex: 1; overflow: hidden; }
.orchestrate-toolbar {
  display: flex; align-items: center; gap: 8px; padding: 12px 20px;
  border-bottom: 1px solid var(--border-secondary); background: var(--bg-navbar);
  backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px);
}
.orchestrate-input {
  flex: 1; padding: 10px 16px; background: var(--bg-input); border: 1px solid var(--border-secondary);
  border-radius: var(--radius-full); font-size: 14px; color: var(--text-primary); outline: none;
  font-family: var(--font-family); transition: border-color 0.2s, box-shadow 0.2s;
}
.orchestrate-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,122,255,0.12); }






.orchestrate-body { position: relative; display: flex; flex: 1; overflow: hidden; }
.orchestrate-palette {
  width: 180px; border-right: 1px solid var(--border-secondary);
  background: var(--bg-sidebar); padding: 12px; overflow-y: auto; flex-shrink: 0;
}
.palette-title { font-size: 12px; font-weight: 700; color: var(--text-tertiary); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.palette-item {
  padding: 10px 12px; margin-bottom: 6px; background: var(--bg-secondary); border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md); font-size: 13px; color: var(--text-secondary); cursor: grab;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}
.palette-item:hover { background: var(--bg-hover); border-color: var(--accent); transform: translateX(2px); }
.palette-item:active { cursor: grabbing; }
#drawflow { flex: 1; background: var(--bg-tertiary); min-height: 400px; position: relative; overflow: hidden; width: 100%; }
/* Drawflow 自定义节点样式 */
.drawflow-node { border-radius: var(--radius-md) !important; border: 1px solid var(--border-secondary) !important; background: var(--bg-modal) !important; box-shadow: var(--shadow-md) !important; min-width: 180px !important; }
.drawflow-node.selected { border-color: var(--accent) !important; box-shadow: 0 0 0 2px rgba(0,122,255,0.15), var(--shadow-md) !important; }
.df-node-card { padding: 0; }
.df-node-header { font-size: 13px; font-weight: 600; color: var(--text-primary); padding: 8px 12px; border-bottom: 1px solid var(--border-secondary); }
.df-node-preview { padding: 6px 12px; font-size: 11px; color: var(--text-tertiary); }
.df-field { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.df-node-status { padding: 4px 12px 8px; font-size: 12px; color: var(--text-tertiary); }
.drawflow-node .input, .drawflow-node .output { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); border: 2px solid var(--bg-primary); }
.drawflow-node .input:hover, .drawflow-node .output:hover { background: var(--brand); }
.drawflow-delete { border-radius: var(--radius-full) !important; }
@media (max-width: 768px) {
  .orchestrate-palette { width: 120px; }
  .orchestrate-input { font-size: 13px; }
}

/* 工作流节点（纯 HTML 渲染，不依赖 Drawflow）*/
.wf-node { display: flex; align-items: center; gap: 10px; background: var(--bg-modal); border: 1px solid var(--border-secondary); border-radius: var(--radius-md); padding: 12px 16px; min-width: 200px; box-shadow: var(--shadow-md); position: relative; transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s; }
.wf-node:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.wf-node[data-status='running'] { border-color: var(--accent); }
.wf-node[data-status='success'] { border-color: var(--success); }
.wf-node[data-status='error'] { border-color: var(--danger); }
.wf-node-icon { font-size: 20px; flex-shrink: 0; }
.wf-node-info { flex: 1; min-width: 0; }
.wf-node-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.wf-node-preview { font-size: 11px; color: var(--text-tertiary); margin-top: 2px; }
.wf-field { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.wf-node-status { font-size: 16px; flex-shrink: 0; }

/* 节点分类（8 大分类 + 子类，简约 SVG 图标随主题变化）*/
.palette-category { margin-bottom: 4px; }
.palette-category-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; cursor: pointer;
  background: var(--bg-secondary); border: 1px solid var(--border-secondary);
  border-radius: var(--radius-sm); font-size: 13px; font-weight: 600;
  color: var(--text-secondary); transition: all 0.15s;
}
.palette-category-header:hover { background: var(--bg-hover); color: var(--text-primary); }
.palette-category-header svg { color: var(--text-tertiary); flex-shrink: 0; transition: color 0.15s; }
.palette-category-header:hover svg { color: var(--text-secondary); }
.palette-category-header .chevron { margin-left: auto; transition: transform 0.2s; }
.palette-category-header.expanded .chevron { transform: rotate(90deg); }
.palette-subitems { display: none; padding: 4px 0 4px 12px; }
.palette-subitems.visible { display: block; }
.palette-subitem {
  padding: 7px 12px; margin-bottom: 3px;
  background: transparent; border: 1px solid transparent;
  border-radius: var(--radius-sm); font-size: 12px;
  color: var(--text-tertiary); cursor: grab; transition: all 0.15s;
}
.palette-subitem:hover { background: var(--bg-secondary); color: var(--text-primary); border-color: var(--border-secondary); }
.palette-subitem:active { cursor: grabbing; }

/* AI编排按钮（圆形图标，主题适配，与开发模式发送按钮一致）*/



/* 节点栏展开/收缩 */


.orchestrate-body.palette-collapsed .orchestrate-palette { width: 0; border: none; overflow: hidden; padding: 0; margin: 0; }
.orchestrate-body.palette-collapsed 
.orchestrate-body.palette-collapsed 

/* AI编排按钮（圆形图标，主题适配，无文字，与开发模式发送按钮一致）*/
.orchestrate-gen-btn { background: var(--btn-primary-bg); color: var(--btn-primary-text); border: none; border-radius: 50%; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: transform 0.2s, opacity 0.2s; flex-shrink: 0; padding: 0; font-size: 0; font-weight: normal; box-shadow: none; }
.orchestrate-gen-btn:hover:not(:disabled) { transform: scale(1.05); }
.orchestrate-gen-btn:disabled { opacity: 0.3; cursor: not-allowed; }
/* 执行按钮（圆形图标，主题适配，无文字）*/
.orchestrate-run-btn { background: var(--btn-primary-bg); color: var(--btn-primary-text); border: none; border-radius: 50%; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: transform 0.2s, opacity 0.2s; flex-shrink: 0; padding: 0; font-size: 0; font-weight: normal; box-shadow: none; }
.orchestrate-run-btn:hover:not(:disabled) { transform: scale(1.05); }
.orchestrate-run-btn:disabled { opacity: 0.3; cursor: not-allowed; }
/* 节点栏展开/收缩（左上角）*/
.palette-toggle { position: absolute; left: 0; top: 0; z-index: 10; background: var(--bg-modal); border: 1px solid var(--border-secondary); border-radius: var(--radius-sm); width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--text-tertiary); transition: all 0.2s; }
.palette-toggle:hover { color: var(--text-primary); background: var(--bg-hover); }
.orchestrate-body.palette-collapsed .orchestrate-palette { width: 0; border: none; overflow: hidden; padding: 0; margin: 0; }
.orchestrate-body.palette-collapsed .palette-toggle svg { transform: rotate(180deg); }

/* :active 状态（与 .send-btn 一致）*/
.orchestrate-gen-btn:active:not(:disabled) { transform: scale(0.95); }
.orchestrate-run-btn:active:not(:disabled) { transform: scale(0.95); }