/* ===========================================
   MetaRec GPT-like Interface Styles
   =========================================== */
   :root {
    /* === 基础背景 === */
    --bg: #FAF7F2;               /* 象牙白，温暖且高级 */
    --bg-secondary: #F2ECE6;      /* 辅助背景，用于块状区域 */
    --card-bg: #FFFFFF;
  
    /* === 主品牌色（焦糖棕 Caramel）=== */
    --primary: #C27A36;           /* 主色：焦糖棕（深度增加，提高高级感） */
    --primary-hover: #A8642C;
    --primary-dark: #8A5324;
    --primary-light: #F6E8D9;     /* 奶油浅棕，用于 hover background */
  
    /* RGB 版本 */
    --primary-rgb: 194, 122, 54;
  
    /* === 次级色（煮茶褐 Tea Brown）=== */
    --secondary: #D8C3A5;         /* 柔和褐色，适合作为 sidebar 和 badge */
    --secondary-light: #EEE4D8;
  
    /* === 强调色（琥珀金 Amber Gold）=== */
    --accent: #FFB347;            /* 高亮：价格、标签、徽章 */
    --accent-light: #FFE3C2;
  
    /* === 字体颜色 === */
    --fg: #2F2A26;                /* 主文字：石墨深棕，比纯黑更高级 */
    --fg-secondary: #6D665F;
    --muted: #A3968A;
    --text-white: #FFFFFF;
  
    /* === 侧边栏（奶油咖啡馆风）=== */
    --sidebar-bg: #F5EFE7;         /* 奶咖浅色，更接近餐饮空间氛围 */
    --sidebar-fg: #4B4239;
    --sidebar-active-bg: #E8D8C6;
    --sidebar-active-fg: #7A5E3A;
    --sidebar-hover-bg: #F3E7DA;
  
    /* === 边框与阴影 === */
    --border: #E2DAD2;
    --border-light: #F3ECE6;
    --border-focus: #C27A36;
  
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.10);
    --shadow-card: 0 1px 4px rgba(0,0,0,0.06);
  
    /* === 状态色 === */
    --error: #D9534F;
    --error-dark: #B13C36;
    --success: #CBA24E;
    --warning: #F0A04B;
  
    /* === 组件 === */
    --user-bg: #C27A36;
    --user-light: #F6EDE3;
  /* --- 11. 阴影系统 (Shadows) --- */
    /* 现代卡片阴影系统，符合图片中的卡片设计 */
    
    /* 极轻微的阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    
    /* 普通卡片阴影 - 清晰的层次感 */
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    
    /* 浮起的大按钮/高亮卡片阴影 - 更明显的提升效果 */
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15), 0 3px 6px rgba(0, 0, 0, 0.1); 
    
    /* 卡片专用阴影 - 符合图片中的卡片样式 */
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.1);
    /* === 透明背景用 RGB 变量 === */
    --bg-rgb: 250, 247, 242;
    --bg-secondary-rgb: 242, 236, 230;
    --sidebar-bg-rgb: 245, 239, 231;
    --fg-rgb: 47, 42, 38;
        /* --- 12. 圆角系统 (Radius) --- */
    /* 风格：现代圆角设计，符合图片中的UI风格 */
    --radius: 16px;       /* 默认卡片圆角 */
    --radius-sm: 8px;    /* 小元素圆角 */
    --radius-lg: 24px;    /* 大容器/模态框圆角 */
    --radius-pill: 999px; /* 胶囊按钮完全圆角 */
  }
  
  
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
  
/* -------------------------
   Layout
--------------------------- */
.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
  background: var(--bg);
  position: relative;
}

/* -------------------------
   Dynamic Background for Chat Page
--------------------------- */
.chat-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.chat-gradient-orb {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.06) 0%, rgba(var(--primary-rgb), 0.03) 50%, transparent 70%);
  filter: blur(50px);
  transform: translate(-50%, -50%);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  opacity: 0.8;
}

.chat-gradient-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
    background: linear-gradient(
    180deg,
    rgba(var(--bg-rgb), 0.95) 0%,
    rgba(var(--bg-rgb), 0.98) 50%,
    var(--white) 100%
  );
  pointer-events: none;
}

.chat-floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.chat-floating-circle {
  position: absolute;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.04) 0%, rgba(var(--primary-rgb), 0.02) 100%);
  filter: blur(30px);
  animation: chatFloatCircle 25s ease-in-out infinite;
  opacity: 0.6;
}

.chat-circle-1 {
  width: 250px;
  height: 250px;
  top: 15%;
  left: 10%;
  animation-delay: 0s;
}

.chat-circle-2 {
  width: 300px;
  height: 300px;
  top: 65%;
  right: 12%;
  animation-delay: 8s;
}

.chat-circle-3 {
  width: 200px;
  height: 200px;
  bottom: 25%;
  left: 55%;
  animation-delay: 15s;
}

@keyframes chatFloatCircle {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.5;
  }
  33% {
    transform: translate(25px, -25px) scale(1.1);
    opacity: 0.7;
  }
  66% {
    transform: translate(-15px, 15px) scale(0.9);
    opacity: 0.4;
  }
}

/* -------------------------
   Sidebar
--------------------------- */
.sidebar {
  width: 280px;
  background: var(--sidebar-bg);
  backdrop-filter: blur(10px);
  border-right: 1px solid rgba(var(--primary-rgb), 0.12);
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow-y: auto;
  height: 100vh;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s cubic-bezier(0.4, 0, 0.2, 1), border 0.3s ease;
  position: relative;
  z-index: 10;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.08), 2px 0 8px rgba(0, 0, 0, 0.04);
  will-change: width;
}

/* 侧边栏resize handle */
.sidebar-resize-handle {
  position: absolute;
  right: 0;
  top: 0;
  width: 4px;
  height: 100%;
  cursor: ew-resize;
  background: transparent;
  z-index: 100;
  transition: background 0.2s ease;
}

.sidebar-resize-handle:hover {
  background: rgba(var(--primary-rgb), 0.2);
}

.sidebar.resizing .sidebar-resize-handle {
  background: rgba(var(--primary-rgb), 0.3);
}

.sidebar.resizing {
  user-select: none;
  transition: none;
}

.sidebar.collapsed {
  width: 0;
  padding: 0;
  border-right: none;
  overflow: hidden;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
  padding: 24px 20px 12px;
  border-bottom: 1px solid rgba(var(--primary-rgb), 0.08);
}

/* 侧边栏头部的收起按钮 */
.sidebar-close-btn {
  background: rgba(var(--primary-rgb), 0.06);
  color: var(--fg-secondary);
  border: 1px solid rgba(var(--primary-rgb), 0.08);
  border-radius: var(--radius-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  padding: 0;
  opacity: 0.7;
}

.sidebar-close-btn:hover {
  background: rgba(var(--primary-rgb), 0.1);
  border-color: rgba(var(--primary-rgb), 0.15);
  color: var(--fg);
  opacity: 1;
  transform: scale(1.05);
}

.sidebar-close-btn:active {
  transform: scale(0.95);
}

.sidebar-close-btn svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
}

.brand {
  font-weight: 700;
  font-size: 20px;
  color: var(--fg);
  letter-spacing: -0.02em;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  height: 40px;
  object-fit: contain;
}
.brand-name {
  width: 100px;
  object-fit: contain;
}

.sidebar.collapsed .brand {
  font-size: 16px;
  margin-bottom: 0;
}

.sidebar.collapsed .brand span {
  display: none;
}

.sidebar.collapsed .brand-logo {
  width: 28px;
  height: 28px;
}

/* 旧的侧边栏切换按钮样式 - 已废弃，保留以防需要 */
.sidebar-toggle {
  display: none; /* 隐藏旧的浮动按钮 */
}

.toggle-arrow {
  font-size: 16px;
  font-weight: bold;
  color: white;
  transition: all 0.3s ease;
  display: block;
  line-height: 1;
}

/* 旧的浮动恢复按钮样式 - 已废弃，保留以防需要 */
.sidebar-restore-btn {
  display: none; /* 隐藏旧的浮动按钮 */
}

.restore-arrow {
  font-size: 16px;
  font-weight: bold;
  color: white;
  transition: all 0.3s ease;
  display: block;
  line-height: 1;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateY(-50%) translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }
}

.muted {
  color: var(--fg-secondary);
  font-size: 13px;
  font-weight: 400;
  padding: 0 16px 20px;
  transition: opacity 0.3s ease;
}

.sidebar.collapsed .muted {
  display: none;
}

.sidebar-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--primary-rgb), 0.15), transparent);
  margin: 16px 20px;
}

/* 服务类型选择器 */
.service-type-selector {
  padding: 0 16px 16px;
}

.service-type-selector label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--fg-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.7;
}

.service-description {
  padding: 0 16px 16px;
  color: var(--fg-secondary);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.4;
  font-style: italic;
}

.status-badge {
  background: var(--warning);
  color: white;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 500;
}

.dropdown-option.disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.dropdown-option.disabled:hover {
  background: transparent;
}
  
  .filters {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  
  .filters label {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
  }
  
  .filters select,
  .filters input[type="number"],
  .filters input[type="text"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: all 0.2s ease;
    background: var(--card-bg);
  }
  
  .filters select:focus,
  .filters input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.08);
  }
  
  /* Special styling for location input */
  #location-input {
    min-height: 48px;
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    border: 2px solid var(--border);
    border-radius: 10px;
    background: var(--gray-light);
    transition: all 0.2s ease;
    resize: vertical;
  }
  
  #location-input:focus {
    border-color: var(--border-focus);
    background: var(--card-bg);
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.08);
  }
  
  #location-input::placeholder {
    color: var(--muted);
    font-style: italic;
  }
  
  /* Compact multi-select styles */
  .compact-multi-select {
    position: relative;
  }
  
  .selected-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 4px;
    min-height: 0;
  }
  
  .selected-tags:empty {
    display: none;
  }
  
  .tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--primary);
    color: white;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
  }

  .tag:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
  }

  .tag-remove {
    font-size: 14px;
    font-weight: bold;
    margin-left: 4px;
    opacity: 0.8;
  }
  
  .dropdown-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
    min-width: 160px;
  }

  .dropdown-trigger:hover {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
  }

  .dropdown-text {
    color: var(--fg);
    font-weight: 500;
  }

  .dropdown-text.placeholder {
    color: var(--muted);
    font-style: italic;
    font-weight: 400;
  }

  .dropdown-arrow {
    color: var(--muted);
    font-size: 12px;
    transition: transform 0.2s ease;
  }

  .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    max-height: 240px;
    overflow-y: auto;
    margin-top: 4px;
  }

  .dropdown-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    cursor: pointer;
    transition: background 0.2s ease;
    font-size: 14px;
  }

  .dropdown-option:hover {
    background: var(--bg-secondary);
  }

  .dropdown-option.selected {
    background: var(--primary-light);
    color: var(--primary);
  }
  
  .checkbox {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 3px;
    font-size: 12px;
    font-weight: bold;
  }
  
  .dropdown-option.selected .checkbox {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
  }
  
  .row {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  
  .space {
    height: 10px;
  }

  /* -------------------------
     Model Selector
  ---------------------------- */
  .model-selector {
    margin-top: 24px;
    margin-bottom: 24px;
  }

  .model-selector label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--fg-secondary);
    font-size: 12px;
    opacity: 0.7;
  }

  /* -------------------------
     Chat History
  ---------------------------- */
  .chat-history {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding: 0 8px;
  }

  .history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    padding: 0 8px;
  }

  .history-header label {
    font-weight: 600;
    color: var(--fg-secondary);
    margin: 0;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.7;
  }

  .new-chat-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.15), 0 2px 4px rgba(var(--primary-rgb), 0.1);
    letter-spacing: 0.3px;
  }

  .new-chat-btn:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-dark) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(var(--primary-rgb), 0.18);
  }

  .history-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .history-item {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    background: transparent;
    border: 1px solid rgba(var(--primary-rgb), 0.1);
    margin: 6px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
  }

  .history-item:hover {
    background: var(--sidebar-hover-bg);
    border-color: rgba(var(--primary-rgb), 0.2);
    transform: translateX(3px);
    box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.06);
  }

  .history-item:hover .delete-chat-btn {
    opacity: 1;
  }

  .history-item.active {
    background: var(--sidebar-active-bg);
    border-color: rgba(var(--primary-rgb), 0.35);
    border-width: 1px;
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.12), 0 2px 4px rgba(var(--primary-rgb), 0.08);
    transform: translateX(2px);
  }

  .history-running-spinner {
    position: absolute;
    right: 8px;
    bottom: 8px;
    width: 10px;
    height: 10px;
    border: 2px solid rgba(var(--primary-rgb), 0.22);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
  }

  .history-task-progress {
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 5px;
    height: 3px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(var(--primary-rgb), 0.12);
  }

  .history-task-progress span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: var(--primary);
    transition: width 0.3s ease;
  }

  .history-content {
    flex: 1;
    min-width: 0;
  }

  .delete-chat-btn {
    background: var(--error);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    opacity: 0;
    transition: all 0.2s ease;
    margin-left: 8px;
    flex-shrink: 0;
  }

  .delete-chat-btn:hover {
    background: var(--error-dark);
    transform: scale(1.1);
  }

  .history-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 8px;
    flex-shrink: 0;
    opacity: 0;
    transition: opacity 0.2s ease;
  }

  .history-item:hover .history-actions {
    opacity: 1;
  }

  .edit-chat-btn {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s ease;
    flex-shrink: 0;
    padding: 0;
  }

  .edit-chat-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
  }

  .history-title-edit {
    width: 100%;
  }

  .history-title-input {
    width: 100%;
    padding: 4px 8px;
    border: 2px solid var(--primary);
    border-radius: var(--radius-sm);
    background: var(--sidebar-bg);
    color: var(--sidebar-fg);
    font-size: 14px;
    font-weight: 500;
    outline: none;
    transition: all 0.2s ease;
  }

  .history-title-input:focus {
    border-color: var(--primary-hover);
    box-shadow: 0 0 0 3px var(--primary-light);
  }

  .history-title {
    font-weight: 500;
    font-size: 14px;
    color: var(--fg);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
  }

  .history-title .chat-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-right: 8px;
    flex-shrink: 0;
    font-size: 16px;
    transition: transform 0.2s ease;
  }

  .history-item:hover .history-title .chat-icon {
    transform: scale(1.1);
  }

  .history-item.active .history-title {
    color: var(--sidebar-active-fg);
    font-weight: 600;
  }

  .history-item.active .history-title .chat-icon {
    transform: scale(1.15);
  }

  .history-preview {
    font-size: 12px;
    color: var(--fg-secondary);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s ease;
    opacity: 0.8;
  }

  .history-item.active .history-preview {
    color: rgba(245, 124, 0, 0.8);
    opacity: 1;
  }

  .history-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
  }

  .history-model {
    background: var(--secondary);
    color: var(--sidebar-fg);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
    font-size: 10px;
  }

  .history-item.active .history-model {
    background: rgba(255, 255, 255, 0.2);
    color: var(--sidebar-active-fg);
  }

  .history-time {
    color: var(--fg-secondary);
    font-size: 10px;
    transition: color 0.2s ease;
    opacity: 0.7;
  }

  .history-item.active .history-time {
    color: rgba(245, 124, 0, 0.7);
    opacity: 1;
  }
  
  /* -------------------------
     Main chat area
  ---------------------------- */
  .main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: transparent;
    transition: margin-left 0.3s ease;
    position: relative;
    z-index: 10;
  }

  .app:has(.sidebar.collapsed) .main {
    margin-left: 0;
    width: 100%;
  }

  .main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: rgba(var(--bg-rgb), 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    gap: 16px;
    min-height: 60px;
    position: relative;
    z-index: 20;
    box-shadow: 0 2px 10px rgba(var(--black-rgb), 0.05);
  }

  /* Header中的侧边栏展开按钮 - 汉堡菜单图标 */
  .sidebar-toggle-header {
    background: transparent;
    color: var(--fg);
    border: none;
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    padding: 0;
    opacity: 0.7;
  }

  .sidebar-toggle-header:hover {
    background: var(--bg-secondary);
    color: var(--fg);
    opacity: 1;
  }

  .sidebar-toggle-header:active {
    transform: scale(0.95);
  }

  .sidebar-toggle-header svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
  }

  .service-selector-section {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 1;
  }

  .service-selector-inline {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
  }

  .service-selector-inline label {
    font-weight: 500;
    color: var(--fg-secondary);
    margin: 0;
    font-size: 14px;
  }

  .service-description-inline {
    color: var(--muted);
    font-size: 13px;
    font-style: italic;
    line-height: 1.4;
    flex: 1;
    min-width: 0;
  }

  .preferences-toggle {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: white;
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    border-radius: var(--radius-sm);
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 6px rgba(var(--primary-rgb), 0.15);
  }

  .preferences-toggle:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-dark) 100%);
    color: white;
    border-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(var(--primary-rgb), 0.18);
  }

  .auth-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    width: min(320px, calc(100vw - 32px));
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--card-bg);
    box-shadow: var(--shadow-lg);
    z-index: 20;
  }

  .auth-panel-title {
    margin-bottom: 4px;
    color: var(--fg);
    font-size: 14px;
    font-weight: 700;
  }

  .auth-panel-subtitle {
    margin-bottom: 12px;
    color: var(--fg-secondary);
    font-size: 13px;
    overflow-wrap: anywhere;
  }

  .auth-mode-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-bottom: 12px;
    padding: 3px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
  }

  .auth-mode-tab {
    min-height: 34px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
    color: var(--fg-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
  }

  .auth-mode-tab:hover {
    color: var(--fg);
    background: rgba(var(--primary-rgb), 0.08);
  }

  .auth-mode-tab.active {
    border-color: rgba(var(--primary-rgb), 0.28);
    background: var(--card-bg);
    color: var(--primary-dark);
    box-shadow: var(--shadow-sm);
  }

  .auth-input {
    width: 100%;
    min-height: 38px;
    margin-bottom: 8px;
    padding: 9px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--fg);
    font-size: 13px;
    outline: none;
    transition: border-color 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease;
  }

  .auth-input::placeholder {
    color: var(--muted);
  }

  .auth-input:focus {
    border-color: var(--border-focus);
    background: var(--card-bg);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.14);
  }

  .auth-error {
    margin-bottom: 8px;
    padding: 8px 10px;
    border: 1px solid rgba(217, 83, 79, 0.24);
    border-radius: var(--radius-sm);
    background: rgba(217, 83, 79, 0.08);
    color: var(--error-dark);
    font-size: 12px;
    line-height: 1.35;
    overflow-wrap: anywhere;
  }

  /* 偏好设置遮罩层 */
  .preferences-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(var(--black-rgb), 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: block;
    animation: fadeIn 0.3s ease;
    transition: z-index 0.3s ease, filter 0.3s ease, opacity 0.3s ease;
  }

  /* 当地图打开时，偏好设置窗口应该在地图图层下并被虚化 */
  body.map-open .preferences-overlay {
    z-index: 9997;
    filter: blur(2px);
    opacity: 0.6;
    pointer-events: none; /* 禁用交互，因为地图在上面 */
  }

  body.map-open .preferences-overlay .preferences-panel {
    pointer-events: none;
  }

  .preferences-panel {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0;
    width: 100%;
    height: 100%;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .preferences-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    cursor: move;
    user-select: none;
  }
  
  /* Rnd组件的resize handle样式 */
  .preferences-overlay .react-resizable-handle {
    background: rgba(var(--primary-rgb), 0.1);
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    transition: background 0.2s ease, border-color 0.2s ease;
  }
  
  .preferences-overlay .react-resizable-handle:hover {
    background: rgba(var(--primary-rgb), 0.2);
    border-color: rgba(var(--primary-rgb), 0.4);
  }
  
  .preferences-overlay .react-resizable-handle-se {
    width: 20px;
    height: 20px;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%23C27A36' d='M13 13H3V3h10v10zM4 4v8h8V4H4z'/%3E%3Cpath fill='%23C27A36' d='M11 11H5V5h6v6z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 12px 12px;
  }
  
  .preferences-overlay .react-resizable-handle-sw {
    width: 20px;
    height: 20px;
    left: 0;
    bottom: 0;
  }
  
  .preferences-overlay .react-resizable-handle-nw {
    width: 20px;
    height: 20px;
    left: 0;
    top: 0;
  }
  
  .preferences-overlay .react-resizable-handle-ne {
    width: 20px;
    height: 20px;
    right: 0;
    top: 0;
  }
  
  .preferences-overlay .react-resizable-handle-w,
  .preferences-overlay .react-resizable-handle-e {
    width: 4px;
    cursor: ew-resize;
  }
  
  .preferences-overlay .react-resizable-handle-n,
  .preferences-overlay .react-resizable-handle-s {
    height: 4px;
    cursor: ns-resize;
  }
  
  .preferences-overlay .react-resizable-handle-nw,
  .preferences-overlay .react-resizable-handle-ne,
  .preferences-overlay .react-resizable-handle-sw,
  .preferences-overlay .react-resizable-handle-se {
    cursor: nwse-resize;
  }
  
  .preferences-overlay .react-resizable-handle-ne,
  .preferences-overlay .react-resizable-handle-sw {
    cursor: nesw-resize;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    flex-shrink: 0;
    position: relative;
  }

  .preferences-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--fg);
  }

  .close-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--error);
    color: white;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.2s ease;
    z-index: 10;
  }

  .close-btn:hover {
    background: var(--error-dark);
    transform: scale(1.1);
  }

  .preferences-panel .filters {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
  }

  @keyframes fadeIn {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
    }
  }

  @keyframes slideUp {
    from {
      opacity: 0;
      transform: translateY(20px) scale(0.95);
    }
    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }

  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* -------------------------
     Messages
  ---------------------------- */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  /* 移除max-width限制，让容器占满整个宽度 */
  width: 100%;
  /* 确保滚动条在右侧 */
  direction: ltr;
  text-align: left;
  /* 自定义滚动条样式 */
  scrollbar-width: thin;
  scrollbar-color: rgba(var(--primary-rgb), 0.3) rgba(var(--bg-rgb), 0.5);
  position: relative;
  z-index: 10;
}

/* 限制消息气泡的最大宽度，但保持滚动条在屏幕右侧 */
.messages .bubble {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Webkit浏览器滚动条样式 */
.messages::-webkit-scrollbar {
  width: 8px;
}

.messages::-webkit-scrollbar-track {
  background: rgba(var(--bg-rgb), 0.5);
  border-radius: 4px;
}

.messages::-webkit-scrollbar-thumb {
  background: rgba(var(--primary-rgb), 0.3);
  border-radius: 4px;
  transition: background 0.3s ease;
}

.messages::-webkit-scrollbar-thumb:hover {
  background: rgba(var(--primary-rgb), 0.5);
}

  .bubble {
    margin-bottom: 16px;
    animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    position: relative;
  }

  /* 用户消息 - 右对齐 */
  .bubble[data-role="user"] {
    align-items: flex-end;
  }

  /* AI消息 - 左对齐 */
  .bubble[data-role="assistant"] {
    align-items: flex-start;
  }

  .who {
    font-size: 11px;
    color: var(--muted);
    margin-bottom: 6px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .content {
    max-width: 80%;
    padding: 12px 16px;
    line-height: 1.5;
    font-size: 14px;
    word-wrap: break-word;
    border-radius: 18px;
    position: relative;
  }

  /* 用户消息样式 - 右侧，白色背景 */
  .bubble[data-role="user"] .content {
    background: rgba(var(--bg-rgb), 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(var(--primary-rgb), 0.12);
    color: var(--fg);
    border-bottom-right-radius: 4px;
    box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.08), 0 1px 3px rgba(var(--black-rgb), 0.06);
    transition: all 0.3s ease;
  }

  .bubble[data-role="user"] .content:hover {
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.12), 0 2px 6px rgba(var(--black-rgb), 0.08);
    transform: translateY(-1px);
  }

  /* AI消息样式 - 左侧，浅灰色背景 */
  .bubble[data-role="assistant"] .content {
    background: rgba(var(--bg-secondary-rgb), 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(var(--primary-rgb), 0.1);
    color: var(--fg);
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.06), 0 1px 3px rgba(var(--black-rgb), 0.04);
    transition: all 0.3s ease;
  }

  .bubble[data-role="assistant"] .content:hover {
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.1), 0 2px 6px rgba(var(--black-rgb), 0.06);
    transform: translateY(-1px);
  }

  .message-content-row {
    max-width: 80%;
    display: flex;
    align-items: flex-start;
    gap: 8px;
  }

  .message-content-row .content {
    max-width: 100%;
  }

  /* Recommendation results need a definite (not shrink-to-fit) width so the card
     grid always has room for 2 columns — otherwise sparse cards (e.g. music with
     no cover art) collapse the container and fall back to a single column. */
  .message-content-row--result {
    width: 80%;
    max-width: 80%;
  }

  .message-content-row--result .content {
    width: 100%;
    max-width: 100%;
  }

  .bubble[data-role="user"] .message-content-row {
    justify-content: flex-end;
  }

  .bubble[data-role="assistant"] .message-content-row {
    justify-content: flex-start;
  }

  /* 复制消息按钮（位于每条消息底部，跟随气泡左右对齐） */
  .message-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
  }

  /* Feedback shares the actions row with the regenerate/copy icons. */
  .message-actions .feedback-controls {
    margin-top: 0;
  }

  .message-copy-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    opacity: 0.55;
    transition: opacity 0.15s ease, color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  }

  .message-copy-button:hover {
    opacity: 1;
    color: var(--primary);
    border-color: var(--line);
    background: var(--card-bg);
  }

  .message-copy-button:focus-visible {
    opacity: 1;
    outline: 2px solid var(--primary);
    outline-offset: 1px;
  }

  .message-edit-textarea {
    width: 100%;
    min-width: min(420px, 64vw);
    resize: vertical;
    border: 1px solid rgba(var(--primary-rgb), 0.18);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font: inherit;
    background: rgba(var(--bg-rgb), 0.96);
    color: var(--fg);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  }

  .message-edit-textarea:focus {
    border-color: var(--primary);
    background: var(--card-bg);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.14);
  }

  .message-edit-actions,
  .message-edit-entry {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .message-edit-actions {
    justify-content: flex-end;
    margin-top: 8px;
  }

  .message-edit-entry {
    flex: 0 0 auto;
    margin-top: 2px;
  }

  .message-branch-switcher {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 2px;
    padding: 2px 4px;
    border: 1px solid rgba(var(--primary-rgb), 0.12);
    border-radius: var(--radius-pill);
    background: rgba(var(--bg-rgb), 0.84);
    box-shadow: var(--shadow-sm);
  }

  .message-branch-button {
    width: 26px;
    height: 26px;
    font-size: 13px;
    background: transparent;
    color: var(--fg-secondary);
  }

  .message-branch-button:hover:not(:disabled) {
    background: rgba(var(--primary-rgb), 0.1);
    border-color: rgba(var(--primary-rgb), 0.14);
    color: var(--primary);
    box-shadow: none;
  }

  .message-branch-count {
    min-width: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    color: var(--fg-secondary);
    line-height: 1;
    user-select: none;
  }

  .message-edit-button {
    width: 34px;
    height: 34px;
    border: 1px solid transparent;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease, opacity 0.18s ease;
  }

  .message-edit-button i {
    pointer-events: none;
  }

  .message-edit-button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.22);
  }

  .message-edit-button:hover:not(:disabled) {
    transform: translateY(-1px) scale(1.04);
  }

  .message-edit-button:active:not(:disabled) {
    transform: translateY(0) scale(0.94);
    box-shadow: var(--shadow-sm);
  }

  .message-edit-button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    box-shadow: none;
  }

  .message-edit-button-primary {
    background: var(--primary);
    border-color: rgba(var(--primary-rgb), 0.18);
    color: var(--text-white);
    box-shadow: 0 4px 10px rgba(var(--primary-rgb), 0.22);
  }

  .message-edit-button-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 7px 14px rgba(var(--primary-rgb), 0.24);
  }

  .message-edit-button-secondary {
    background: rgba(var(--bg-rgb), 0.94);
    border-color: rgba(var(--primary-rgb), 0.16);
    color: var(--fg-secondary);
    box-shadow: var(--shadow-sm);
  }

  .message-edit-button-secondary:hover:not(:disabled) {
    background: var(--primary-light);
    border-color: rgba(var(--primary-rgb), 0.32);
    color: var(--primary-dark);
    box-shadow: 0 5px 12px rgba(var(--primary-rgb), 0.14);
  }

  .message-edit-button-ghost {
    width: 30px;
    height: 30px;
    background: transparent;
    color: var(--muted);
  }

  .message-edit-button-ghost:hover:not(:disabled) {
    background: rgba(var(--primary-rgb), 0.1);
    border-color: rgba(var(--primary-rgb), 0.14);
    color: var(--primary);
    box-shadow: 0 4px 10px rgba(var(--primary-rgb), 0.12);
  }

  .bubble:last-child {
    margin-bottom: 120px;
  }
  
  /* -------------------------
     Composer (input area)
  ---------------------------- */
  .composer {
    border-top: 1px solid var(--border-light);
    background: rgba(var(--bg-rgb), 0.95);
    backdrop-filter: blur(10px);
    padding: 20px 24px;
    position: sticky;
    bottom: 0;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    z-index: 20;
    box-shadow: 0 -2px 10px rgba(var(--black-rgb), 0.05);
  }

  .composer-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(var(--bg-rgb), 0.9);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(var(--primary-rgb), 0.2);
    border-radius: var(--radius-lg);
    padding: 12px 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.1), 0 1px 3px rgba(var(--black-rgb), 0.05);
  }

  .composer-inner:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.15), 0 4px 12px rgba(var(--primary-rgb), 0.2);
    background: rgba(var(--bg-rgb), 0.95);
    transform: translateY(-1px);
  }
  
  /* Voice input button */
  .voice-btn {
    background: var(--white);
    border: 1px solid var(--gray-border);
    color: var(--gray-text);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    flex-shrink: 0;
    box-shadow: 0 1px 2px rgba(var(--black-rgb), 0.05);
  }
  
  .voice-btn svg {
    width: 20px;
    height: 20px;
  }
  
  .voice-btn:hover:not(:disabled) {
    background: var(--gray-light-2);
    border-color: var(--primary);
    color: var(--primary);
    transform: scale(1.05);
    box-shadow: 0 2px 4px rgba(var(--black-rgb), 0.1);
  }
  
  .voice-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }
  
  .voice-btn.listening {
    background: var(--error-light-bg);
    border-color: var(--primary);
    color: var(--primary);
    animation: pulse 1.5s infinite;
    box-shadow: 0 0 0 0 rgba(var(--primary-rgb), 0.7);
  }
  
  @keyframes pulse {
    0% {
      box-shadow: 0 0 0 0 rgba(var(--primary-rgb), 0.7);
    }
    70% {
      box-shadow: 0 0 0 10px rgba(var(--primary-rgb), 0);
    }
    100% {
      box-shadow: 0 0 0 0 rgba(var(--primary-rgb), 0);
    }
  }

  .composer input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 15px;
    color: var(--fg);
    line-height: 1.5;
  }

  .composer input::placeholder {
    color: var(--muted);
  }

  .send {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.25);
  }

  .send:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-dark) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.35);
  }

  .send:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(var(--primary-rgb), 0.25);
  }

  .send:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
  }
  
  /* -------------------------
     Results cards
  ---------------------------- */
  .card-grid {
    display: grid;
    /* min(100%, 260px) keeps cards from overflowing on very narrow phones */
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
    gap: 16px;
    margin-top: 12px;
  }
  
  .card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-card);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--border-focus);
  }

  .badge {
    display: inline-block;
    background: var(--primary);
    color: var(--text-white);
    border-radius: var(--radius-sm);
    padding: 4px 8px;
    font-size: 11px;
    font-weight: 500;
  }
  
  /* -------------------------
     Skeleton Loading
  ---------------------------- */
  .skeleton {
    height: 12px;
    background: var(--border);
    border-radius: 4px;
    animation: shimmer 1.2s infinite;
  }
  
  @keyframes shimmer {
    0% {
      opacity: 0.4;
    }
    50% {
      opacity: 0.8;
    }
    100% {
      opacity: 0.4;
    }
  }
  
  /* -------------------------
     Animations
  ---------------------------- */
  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .delete-dialog-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1900;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
    background: rgba(47, 42, 38, 0.36);
    backdrop-filter: blur(5px);
  }

  .delete-dialog {
    width: min(440px, 100%);
    border-radius: 8px;
    border: 1px solid rgba(var(--primary-rgb), 0.18);
    background: rgba(var(--bg-rgb), 0.98);
    box-shadow: 0 18px 44px rgba(47, 42, 38, 0.22), 0 4px 12px rgba(var(--primary-rgb), 0.12);
    padding: 18px;
    color: var(--fg);
  }

  .delete-dialog-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 12px;
  }

  .delete-dialog-kicker {
    margin-bottom: 4px;
    color: var(--primary-dark);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .delete-dialog h2 {
    margin: 0;
    color: var(--fg);
    font-size: 1.15rem;
    line-height: 1.25;
  }

  .delete-dialog-close {
    width: 30px;
    height: 30px;
    border: 1px solid rgba(var(--primary-rgb), 0.14);
    border-radius: 6px;
    background: var(--card-bg);
    color: var(--fg-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
  }

  .delete-dialog-close:hover:not(:disabled) {
    border-color: rgba(var(--primary-rgb), 0.28);
    color: var(--fg);
  }

  .delete-dialog-copy {
    margin: 0 0 12px;
    color: var(--fg-secondary);
    font-size: 0.95rem;
    line-height: 1.45;
    overflow-wrap: anywhere;
  }

  .delete-dialog-note {
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 0.86rem;
    line-height: 1.4;
  }

  .delete-dialog-note {
    margin-bottom: 8px;
    border: 1px solid rgba(var(--primary-rgb), 0.18);
    background: rgba(var(--primary-rgb), 0.08);
    color: var(--primary-dark);
  }

  .delete-dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 16px;
  }

  .delete-dialog-actions button {
    border-radius: 8px;
    padding: 9px 14px;
    font-size: 0.9rem;
    font-weight: 650;
    cursor: pointer;
  }

  .delete-dialog-actions button:disabled {
    cursor: not-allowed;
    opacity: 0.68;
  }

  .delete-dialog-secondary {
    border: 1px solid rgba(var(--primary-rgb), 0.16);
    background: var(--card-bg);
    color: var(--fg);
  }

  .delete-dialog-secondary:hover:not(:disabled) {
    border-color: rgba(var(--primary-rgb), 0.32);
    background: var(--primary-light);
  }

  .delete-dialog-danger {
    border: 1px solid rgba(177, 60, 54, 0.28);
    background: var(--error);
    color: var(--text-white);
    box-shadow: 0 4px 10px rgba(177, 60, 54, 0.18);
  }

  .delete-dialog-danger:hover:not(:disabled) {
    background: var(--error-dark);
  }
  
  .task-notification-tray {
    position: fixed;
    left: 18px;
    bottom: 18px;
    z-index: 1700;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: min(360px, calc(100vw - 36px));
    pointer-events: none;
  }

  .task-notification {
    pointer-events: auto;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: start;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: rgba(var(--bg-rgb), 0.96);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    animation: notificationIn 260ms cubic-bezier(0.22, 1, 0.36, 1);
  }

  /* 自动消失 / 手动关闭时的淡出动画（时长需与 NOTIFICATION_EXIT_MS 一致） */
  .task-notification.is-leaving {
    pointer-events: none;
    animation: notificationOut 260ms ease forwards;
  }

  @keyframes notificationIn {
    from {
      opacity: 0;
      transform: translateX(-16px) scale(0.98);
    }
    to {
      opacity: 1;
      transform: translateX(0) scale(1);
    }
  }

  @keyframes notificationOut {
    from {
      opacity: 1;
      transform: translateX(0) scale(1);
    }
    to {
      opacity: 0;
      transform: translateX(-16px) scale(0.98);
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .task-notification,
    .task-notification.is-leaving {
      animation-duration: 1ms;
    }
  }

  .task-notification.success {
    border-color: rgba(58, 155, 110, 0.32);
  }

  .task-notification.error {
    border-color: rgba(220, 77, 77, 0.35);
  }

  .task-notification-content {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .task-notification-content strong {
    font-size: 0.92rem;
    color: var(--fg);
  }

  .task-notification-content span {
    font-size: 0.84rem;
    color: var(--muted);
    line-height: 1.35;
  }

  .task-notification-content code {
    font-size: 0.72rem;
    color: var(--muted);
    word-break: break-all;
  }

  .task-notification-actions {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .task-notification-actions button {
    border: 1px solid var(--line);
    background: var(--card-bg);
    color: var(--fg);
    border-radius: 6px;
    padding: 5px 8px;
    cursor: pointer;
    font-size: 0.8rem;
    line-height: 1;
  }

  .task-notification-actions button:hover {
    border-color: var(--primary);
    color: var(--primary);
  }

  /* -------------------------
     Responsive
  ---------------------------- */
  @media (max-width: 768px) {
    .sidebar {
      position: fixed;
      left: 0;
      top: 0;
      height: 100vh;
      z-index: 1000;
      transform: translateX(-100%);
      transition: transform 0.3s ease;
      width: 280px;
    }

    .sidebar:not(.collapsed) {
      transform: translateX(0);
    }

    .sidebar.collapsed {
      width: 0;
      transform: translateX(-100%);
    }

    /* 移动端header中的按钮样式 */
    .sidebar-toggle-header {
      width: 36px;
      height: 36px;
    }

    .sidebar-toggle-header svg {
      width: 18px;
      height: 18px;
    }

    /* 移动端侧边栏关闭按钮样式 */
    .sidebar-close-btn {
      width: 36px;
      height: 36px;
    }

    .sidebar-close-btn svg {
      width: 20px;
      height: 20px;
    }

    .app:has(.sidebar:not(.collapsed)) .main {
      margin-left: 0;
    }

    .main-header {
      padding: 12px 16px;
      flex-direction: column;
      gap: 12px;
      align-items: stretch;
    }

    .service-selector-section {
      flex-direction: column;
      align-items: stretch;
      gap: 12px;
    }

    .service-selector-inline {
      justify-content: center;
    }

    .service-description-inline {
      text-align: center;
      font-size: 12px;
    }

    .composer {
      padding: 16px;
    }

    .messages {
      padding: 16px;
      /* 移动端也保持滚动条在右侧 */
      direction: ltr;
      text-align: left;
      /* 移动端也移除max-width限制 */
      width: 100%;
    }
    
    .messages .bubble {
      max-width: 100%;
      margin-left: 0;
      margin-right: 0;
    }

    /* Rnd wrapper is sized to the viewport on mobile; fill it fully */
    .preferences-panel {
      width: 100%;
      max-height: none;
    }

    .preferences-panel .filters {
      padding: 16px;
    }

    .preferences-header {
      padding: 16px 20px;
      /* panel is not draggable on mobile */
      cursor: default;
    }

    .close-btn {
      top: 8px;
      right: 8px;
      width: 28px;
      height: 28px;
      font-size: 16px;
    }
  }

/* Confirmation dialog styles */
.confirmation-message {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
}

.confirmation-text {
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 12px;
  color: var(--fg);
}

.confirmation-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.confirm-btn, .cancel-btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.confirm-btn {
  background: var(--primary);
  color: white;
}

.confirm-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.cancel-btn {
  background: var(--muted);
  color: white;
}

.cancel-btn:hover {
  background: var(--border);
  transform: translateY(-1px);
}

/* Thinking process styles */
.thinking-container {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
}

.thinking-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-weight: 500;
  color: var(--fg);
  font-size: 13px;
}

.thinking-icon {
  font-size: 24px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.thinking-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.thinking-step {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 4px 0;
  transition: all 0.3s ease;
}

.thinking-step.thinking {
  background: transparent;
  border: none;
}

.thinking-step.completed {
  background: transparent;
  border: none;
}

.thinking-step.error {
  background: transparent;
  border: none;
}

.step-indicator {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: bold;
  flex-shrink: 0;
  margin-top: 1px;
}

.thinking-step.thinking .step-indicator {
  background: var(--primary);
  color: white;
  animation: spin 1s linear infinite;
}

.thinking-step.completed .step-indicator {
  background: var(--success-bright);
  color: white;
}

.thinking-step.error .step-indicator {
  background: var(--error-bright);
  color: white;
}

.thinking-complete {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 4px 0;
  background: transparent;
  border: none;
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.step-content {
  flex: 1;
}

.step-description {
  font-weight: 500;
  color: var(--fg);
  margin-bottom: 2px;
  font-size: 13px;
}

.step-details {
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
}

/* 处理状态样式 */
.processing-container {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  transition: all 0.3s ease;
}

.processing-container .thinking-steps {
  margin-top: 16px;
  animation: fadeInUp 0.5s ease;
}

.processing-container .thinking-step {
  animation: slideInLeft 0.4s ease;
  transition: all 0.3s ease;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.processing-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-weight: 500;
  color: var(--fg);
  font-size: 13px;
}

.processing-icon {
  font-size: 20px;
  animation: spin 2s linear infinite;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--gray-border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.processing-message {
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
}

/* Preferences loading */
.preferences-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  gap: 16px;
}

.preferences-loading p {
  color: var(--muted);
  font-size: 14px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Preferences actions */
.preferences-actions {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}

.submit-preferences-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.submit-preferences-btn:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.submit-preferences-btn:disabled {
  background: var(--muted);
  cursor: not-allowed;
  transform: none;
}

/* 移动端响应式 */
@media (max-width: 768px) {
  .content {
    max-width: 85%;
  }
  
  .confirmation-actions {
    flex-direction: column;
  }
  
  .confirm-btn, .cancel-btn {
    width: 100%;
  }
  
  .thinking-header {
    font-size: 12px;
  }
  
  .step-description {
    font-size: 12px;
  }
  
  .step-details {
    font-size: 11px;
  }
}