/**
 * UI Framework - 统一UI组件样式库
 * 为所有前端页面提供一致的UI组件样式
 * 版本: 1.0.0
 */

/* ============================================
   步骤指示器 (Steps Bar)
   ============================================ */
.steps-bar {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 24px 20px 16px;
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  flex: 0 0 auto;
  cursor: pointer;
}

.step-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
  transition: all 0.3s;
}

.step-item.active .step-dot {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(102,126,234,0.4);
}

.step-item.done .step-dot {
  background: var(--success);
  color: #ffffff;
}

.step-name {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
  white-space: nowrap;
  transition: color 0.3s;
}

.step-item.active .step-name {
  color: var(--accent);
  font-weight: 600;
}

.step-item.done .step-name {
  color: var(--success);
}

.step-divider {
  width: 40px;
  height: 2px;
  background: var(--border);
  margin: 15px 8px 0;
  transition: background 0.3s;
  flex-shrink: 0;
}

.step-divider.active {
  background: var(--success);
}

/* ============================================
   底部悬浮栏 (Bottom Bar)
   ============================================ */
.uf-bottom-bar {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-width, 0);
  right: 0;
  background: #ffffff;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.1);
  padding: 12px 16px;
  display: none;
  z-index: 999;
  transition: left 0.3s;
}

body.has-app-sidebar.sidebar-collapsed .uf-bottom-bar {
  left: var(--sidebar-collapsed, 0);
}

.uf-bottom-bar.show {
  display: block;
}

.uf-bottom-bar .btn-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   页面弹窗 (Page Modal)
   ============================================ */
.uf-page-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.uf-page-modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.uf-page-modal-container {
  background: #fff;
  border-radius: 16px;
  width: 90%;
  max-width: 900px;
  height: 85vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  transition: transform 0.3s;
}

.uf-page-modal-overlay.show .uf-page-modal-container {
  transform: scale(1);
}

.uf-page-modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid #eee;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.uf-page-modal-title {
  font-size: 16px;
  font-weight: 600;
}

.uf-page-modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: #f5f5f5;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.uf-page-modal-close:hover {
  background: #e0e0e0;
}

.uf-page-modal-body {
  flex: 1;
  overflow: hidden;
}

.uf-page-modal-body iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ============================================
   页面头部 (Page Header)
   ============================================ */
.uf-page-header {
  position: relative;
  padding: 20px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.uf-page-header .header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.uf-page-header .header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.uf-page-header .back-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}

.uf-page-header .back-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.uf-page-header .header-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.uf-page-header .header-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.uf-page-header .header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ============================================
   通用卡片 (Card)
   ============================================ */
.uf-card {
  width: 100%;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.uf-card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ============================================
   表单元素 (Form Elements)
   ============================================ */
.uf-form-group {
  margin-bottom: 16px;
}

.uf-form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 8px;
}

.uf-input,
.uf-select,
.uf-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  color: var(--text);
  background: #fafafa;
  transition: all 0.2s;
  font-family: inherit;
}

.uf-input:focus,
.uf-select:focus,
.uf-textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: white;
  box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
}

.uf-textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.6;
}

.uf-form-hint {
  font-size: 12px;
  color: #999;
  margin-top: 4px;
}

/* ============================================
   按钮 (Buttons)
   ============================================ */
.uf-btn {
  padding: 12px 24px;
  border-radius: 10px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.uf-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.uf-btn:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  transition-duration: 0.1s;
}

.uf-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.uf-btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent));
  color: white;
  box-shadow: 0 4px 12px rgba(102,126,234,0.3);
}

.uf-btn-primary:hover {
  box-shadow: 0 8px 20px rgba(102,126,234,0.4);
  filter: brightness(1.05);
}

.uf-btn-primary:active {
  filter: brightness(0.95);
}

.uf-btn-secondary {
  background: var(--surface, #f0f0f0);
  color: var(--text);
}

.uf-btn-secondary:hover {
  background: var(--border, #e0e0e0);
}

.uf-btn-outline {
  background: white;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.uf-btn-outline:hover {
  background: rgba(102,126,234,0.08);
  border-color: var(--accent);
}

.uf-btn-success {
  background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(76,175,80,0.3);
}

.uf-btn-success:hover {
  box-shadow: 0 8px 20px rgba(76,175,80,0.4);
  filter: brightness(1.05);
}

.uf-btn-danger {
  background: linear-gradient(135deg, #f44336 0%, #e57373 100%);
  color: white;
}

.uf-btn-danger:hover {
  box-shadow: 0 8px 20px rgba(244,67,54,0.4);
  filter: brightness(1.05);
}

/* ============================================
   选择按钮组 (Toggle Button Groups)
   ============================================ */
.uf-toggle-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.uf-toggle-btn {
  padding: 8px 16px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  background: white;
  color: var(--text);
}

.uf-toggle-btn:hover {
  border-color: var(--accent);
}

.uf-toggle-btn.active {
  background: var(--accent);
  color: white;
  border-color: transparent;
}

/* 性别选择 */
.uf-gender-group {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.uf-gender-btn {
  flex: 1;
  padding: 10px;
  border: 2px solid var(--border);
  border-radius: 10px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: white;
  font-size: 14px;
}

.uf-gender-btn:hover {
  border-color: var(--accent);
}

.uf-gender-btn.active {
  border-color: var(--accent);
  background: rgba(102,126,234,0.06);
  color: var(--accent);
  font-weight: 600;
}

/* ============================================
   章节列表 (Chapter List)
   ============================================ */
.uf-chapter-list {
  margin-top: 16px;
}

.uf-chapter-item {
  display: flex;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 8px;
  background: white;
  transition: all 0.2s;
}

.uf-chapter-item:hover {
  border-color: var(--accent);
}

.uf-chapter-item.generated {
  border-left: 3px solid var(--success);
}

.uf-chapter-index {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  margin-right: 12px;
  flex-shrink: 0;
}

.uf-chapter-info {
  flex: 1;
  min-width: 0;
}

.uf-chapter-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.uf-chapter-status {
  font-size: 12px;
  color: var(--text-secondary);
}

.uf-chapter-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.uf-chapter-action-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  font-size: 14px;
}

.uf-chapter-action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================
   创意卡片 (Idea Card)
   ============================================ */
.uf-idea-card {
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: all 0.2s;
  background: white;
}

.uf-idea-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.uf-idea-card.selected {
  border-color: var(--accent);
  background: rgba(102,126,234,0.06);
  box-shadow: 0 0 0 1px rgba(102,126,234,0.2);
}

.uf-idea-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.uf-idea-card-content {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   大纲显示 (Outline Display)
   ============================================ */
.uf-outline-section {
  margin-bottom: 16px;
}

.uf-outline-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.uf-outline-value {
  padding: 12px;
  background: #fafafa;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ============================================
   导出统计 (Export Stats)
   ============================================ */
.uf-export-stats {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.uf-export-stat {
  flex: 1;
  text-align: center;
  padding: 16px;
  background: var(--bg);
  border-radius: 12px;
}

.uf-export-stat-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
}

.uf-export-stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ============================================
   信息框 (Info Box)
   ============================================ */
.uf-info-box {
  background: rgba(102,126,234,0.05);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.uf-info-box.warning {
  background: rgba(245,158,11,0.05);
  border-left-color: var(--warning);
}

.uf-info-box.success {
  background: rgba(34,197,94,0.05);
  border-left-color: var(--success);
}

/* ============================================
   AI生成中动画 (AI Generating)
   ============================================ */
.uf-ai-generating {
  text-align: center;
  padding: 40px;
}

.uf-ai-generating-text {
  font-size: 14px;
  color: var(--text-secondary);
}

.uf-ai-generating-dots::after {
  content: '';
  animation: ufDots 1.5s infinite;
}

@keyframes ufDots {
  0% { content: '.'; }
  33% { content: '..'; }
  66% { content: '...'; }
  100% { content: '.'; }
}

/* ============================================
   隐藏类
   ============================================ */
.uf-hidden {
  display: none !important;
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 768px) {
  .steps-bar {
    padding: 16px 12px 12px;
  }

  .step-divider {
    width: 20px;
    margin: 15px 4px 0;
  }

  .step-name {
    font-size: 11px;
  }

  .uf-bottom-bar .btn-group {
    flex-direction: column;
  }

  .uf-btn {
    width: 100%;
  }

  .uf-page-modal-container {
    width: 95%;
    height: 90vh;
  }

  .uf-page-modal-header {
    padding: 12px 16px;
  }

  .uf-export-stats {
    flex-direction: column;
  }
}

/* ============================================
   布局修正 - 内容铺满全屏
   覆盖 common.css 中 .card 的 max-width: 800px 限制
   ============================================ */
@media (min-width: 768px) {
  body.has-app-sidebar .card {
    max-width: none;
    margin-left: 0;
    margin-right: 0;
  }
}