/**
 * chat.css — 首页对话输入 + 聊天页样式
 * 参照豆包聊天对话框设计
 */

/* ===== 首页：全屏布局 ===== */
.home-page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 20px 200px;
  background: #F7F8FA;
}

/* ===== 首页：Logo 区域 ===== */
.home-logo-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 24px;
}

.home-logo-img {
  width: 56px;
  height: 56px;
}

/* ===== 首页：输入区域 ===== */
.home-input-section {
  width: 100%;
  max-width: 420px;
}

.home-textarea-wrap {
  position: relative;
  background: var(--color-card);
  border-radius: 20px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  padding: 14px 16px;
  padding-bottom: 38px;
  transition: box-shadow 0.2s ease;
}

.home-textarea-wrap:focus-within {
  box-shadow: 0 2px 16px rgba(0, 100, 137, 0.12);
}

.home-textarea {
  width: 100%;
  border: none;
  outline: none;
  resize: none;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-ink);
  background: transparent;
  font-family: inherit;
  min-height: 72px;
  max-height: 160px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.home-textarea::placeholder {
  color: var(--color-placeholder);
}

/* 发送按钮：固定在文本框右下角 */
.home-send-btn {
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.15s ease, opacity 0.15s ease;
  color: #fff;
}

.home-send-btn:active {
  transform: scale(0.9);
  opacity: 0.85;
}

.home-send-btn:disabled {
  background: var(--color-border);
  cursor: not-allowed;
}

.send-icon {
  width: 13px;
  height: 13px;
  color: #fff;
}

/* ===== 首页：继续上次对话 ===== */
.home-continue-btn {
  margin-top: 16px;
  font-size: 13px;
  color: #333333;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px 8px 8px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
  display: flex;
  align-items: center;
  gap: 4px;
}

.home-continue-btn .arrow-icon {
  width: 12px;
  height: 12px;
  color: var(--color-muted);
  flex-shrink: 0;
}

.home-continue-btn:active {
  transform: scale(0.97);
  opacity: 0.7;
}


/* ===== 聊天页面 ===== */
.chat-page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: #F7F8FA;
  padding-top: var(--header-height);
}

.chat-back {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
  flex-shrink: 0;
}

.chat-back:active {
  background: var(--color-divider);
}

/* 聊天消息区 */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px;
  padding-bottom: calc(80px + var(--safe-bottom));
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* 消息行 */
.msg-row {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  animation: msgIn 0.3s ease;
}

.msg-row.user {
  flex-direction: row-reverse;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* AI消息（默认：短消息白色气泡） */
.msg-bubble.ai {
  max-width: 85%;
  padding: 10px 14px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-ink);
  background: #FFFFFF;
  border-radius: 16px;
  border-top-left-radius: 4px;
  word-break: break-word;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* AI消息（长消息：无背景，全宽展开，参考DeepSeek格式） */
.msg-bubble.ai.ai-long {
  max-width: 100%;
  padding: 0;
  line-height: 1.75;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}

/* 长消息段落排版 */
.msg-bubble.ai.ai-long .ai-paragraph {
  margin: 0 0 10px 0;
  text-align: justify;
}
.msg-bubble.ai.ai-long .ai-paragraph:last-child {
  margin-bottom: 0;
}

/* 长消息：小节标题 */
.msg-bubble.ai.ai-long .ai-section-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--color-ink);
  margin-top: 14px;
  margin-bottom: 6px;
  padding-left: 8px;
  border-left: 3px solid var(--color-primary);
}

/* 长消息：列表项 */
.msg-bubble.ai.ai-long .ai-list-item {
  padding-left: 4px;
  margin-bottom: 6px;
  color: var(--color-ink);
}

/* 用户消息：保留气泡 */
.msg-bubble.user {
  max-width: 75%;
  padding: 10px 14px;
  font-size: 15px;
  line-height: 1.6;
  background: var(--color-primary);
  color: #fff;
  border-radius: 16px;
  border-top-right-radius: 4px;
  word-break: break-word;
}

/* 打字指示器 */
.typing-dots {
  display: flex;
  gap: 4px;
  padding: 4px 0;
}

.typing-dots span {
  width: 7px;
  height: 7px;
  background: var(--color-placeholder);
  border-radius: 50%;
  animation: typing 1.2s infinite;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}


/* ===== 聊天页底部输入区（固定悬浮） ===== */
.chat-input-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(247, 248, 250, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  padding: 10px 12px;
  padding-bottom: calc(10px + var(--safe-bottom));
  display: flex;
  align-items: flex-end;
  z-index: 100;
}

.chat-input-wrap {
  flex: 1;
  background: var(--color-card);
  border-radius: 20px;
  padding: 7px 7px 7px 14px;
  min-height: 44px;
  max-height: 120px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.2s ease;
}

.chat-input-wrap:focus-within {
  box-shadow: 0 2px 16px rgba(0, 100, 137, 0.12);
}

.chat-input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 15px;
  line-height: 20px;
  background: transparent;
  color: var(--color-ink);
  resize: none;
  font-family: inherit;
  min-height: 30px;
  max-height: 100px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 5px 0;
}

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

/* 发送按钮 */
.chat-send-btn {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.15s ease, opacity 0.15s ease;
  color: #fff;
}

.chat-send-btn:active {
  transform: scale(0.9);
  opacity: 0.85;
}

.chat-send-btn:disabled {
  background: var(--color-border);
  cursor: not-allowed;
}

.chat-send-btn .send-icon {
  width: 14px;
  height: 14px;
}

/* ===== 书籍卡片区域 ===== */
.chat-book-cards {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}

/* 单张书籍卡片 */
.chat-book-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

/* 学习计划卡片（移除左侧色条） */
.chat-book-card-plan {
}

/* 卡片头部：书名 + 标签 */
.chat-book-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.chat-book-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
  flex: 1;
  min-width: 0;
}

/* 学习计划步骤 */
.chat-plan-step {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background: #E8F4F8;
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  flex-shrink: 0;
}

/* 作者 */
.chat-book-card-author {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 8px;
}

/* 书籍介绍正文（大字+深色） */
.chat-book-card-desc {
  font-size: 14px;
  color: var(--color-ink);
  line-height: 1.6;
}

/* 卡片操作按钮区 */
.chat-book-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  align-items: center;
}

/* 卡片小标题：书籍介绍 */
.chat-card-label-intro {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink);
  margin-top: 10px;
  margin-bottom: 4px;
}

/* 卡片小标题：推荐理由（与书籍介绍统一） */
.chat-card-label-reason {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink);
  margin-top: 10px;
  margin-bottom: 4px;
}

/* 反馈按钮 */
.chat-feedback-btn {
  font-size: 13px;
  color: var(--color-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 5px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}

.chat-feedback-btn:active {
  transform: scale(0.97);
  background: var(--color-divider);
}

/* 勾选图标 */
.chat-feedback-btn .check-icon {
  display: none;
  width: 12px;
  height: 12px;
}

/* 激活状态：圆形 + 小勾 + 主色图标 + 半透明浅色背景 */
.chat-feedback-btn-active {
  color: var(--color-primary);
  background: rgba(0, 100, 137, 0.08);
  border-color: transparent;
  border-radius: 50%;
  padding: 5px;
  font-size: 0;
}

.chat-feedback-btn-active .check-icon {
  display: block;
  stroke: var(--color-primary);
}

/* 已读卡片：半透明 */
.chat-book-card-read {
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

/* 加入书架按钮 */
.chat-shelf-btn {
  font-size: 13px;
  color: #fff;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-pill);
  padding: 5px 18px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
}

.chat-shelf-btn:active {
  opacity: 0.85;
  transform: scale(0.97);
}

.chat-shelf-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.chat-shelf-btn-done {
  background: var(--color-success);
}

/* 深度解读入口（分割线+箭头，无背景） */
.chat-analysis-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--color-divider);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
}

.chat-analysis-link:active {
  opacity: 0.7;
  transform: scale(0.98);
}

.chat-analysis-link-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.chat-analysis-link-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.chat-analysis-link-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}

.chat-analysis-link-hint {
  font-size: 12px;
  color: var(--color-placeholder);
}

.chat-analysis-link-arrow {
  width: 18px;
  height: 18px;
  color: var(--color-placeholder);
  flex-shrink: 0;
}

/* 观点提炼入口 */
.chat-insight-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--color-divider);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
}

.chat-insight-link:active {
  opacity: 0.7;
  transform: scale(0.98);
}

.chat-insight-link-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}

/* ===== 标签 ===== */
.chat-book-tag {
  font-size: 12px;
  border-radius: var(--radius-pill);
  padding: 2px 10px;
  flex-shrink: 0;
  font-weight: 500;
}

/* 共情标签（暖色） */
.chat-tag-empathy {
  background: var(--color-empathy-bg);
  color: var(--color-empathy-text);
}

/* 破局标签（冷色） */
.chat-tag-breakthrough {
  background: var(--color-breakthrough-bg);
  color: var(--color-breakthrough-text);
}

/* 学习计划：入门（绿） */
.chat-tag-intro {
  background: #E8F8F0;
  color: #10B981;
}

/* 学习计划：深化（蓝） */
.chat-tag-deep {
  background: #E8F4F8;
  color: #006489;
}

/* 学习计划：进阶（紫） */
.chat-tag-advanced {
  background: #F0EDF8;
  color: #6C5CE7;
}