/* ============================================================
   一堆古书 · 书库（封面网格）—— 单独样式
   依赖 style.css 的 CSS 变量；书库页禁装饰性动画，仅允许
   卡片悬停 transform 0.2s 与点击反馈。
   ============================================================ */

/* ---------- 布局容器 ---------- */
.lib-grid-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.lib-title {
  font-family: var(--font-serif);
  font-size: 30px;
  letter-spacing: 6px;
  margin: 22px 0 4px;
}

.lib-sub {
  color: var(--ink-soft);
  font-size: 13px;
  margin: 0 0 18px;
}

/* ---------- 书目范围切换（本站藏书 / 待入库） ---------- */
.lib-mode {
  display: flex;
  gap: 6px;
  margin: 0 0 12px;
}

.lib-mode-btn {
  border: 1px solid var(--line);
  background: var(--paper-light);
  color: var(--ink-soft);
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 20px;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.lib-mode-btn:hover { color: var(--accent); }

.lib-mode-btn.is-active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.lib-reconly {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--ink-soft);
  cursor: pointer;
  user-select: none;
}

/* ---------- 筛选栏 ---------- */
.lib-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

.lib-tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.lib-tab {
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink-soft);
  font-size: 14px;
  padding: 5px 13px;
  border-radius: 20px;
  cursor: pointer;
  letter-spacing: 1px;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.lib-tab:hover { color: var(--accent); }

.lib-tab.is-active {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(158, 43, 37, 0.05);
}

.lib-sort {
  border: 1px solid var(--line);
  background: var(--paper-light);
  color: var(--ink);
  font-size: 13px;
  padding: 5px 8px;
  border-radius: 6px;
  cursor: pointer;
}

.lib-search {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 5px 12px;
  background: var(--paper-light);
}

.lib-search input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 13px;
  width: 150px;
  color: var(--ink);
}

/* ---------- 封面网格 ---------- */
.lib-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

/* ---------- 卡片 ---------- */
.book-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.book-card:active { transform: scale(0.98); }

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(26, 26, 26, 0.12);
}

/* ---------- 封面（纯 CSS 渲染） ---------- */
.book-card-cover {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f7f3ea;
  box-shadow: 0 2px 8px rgba(26, 26, 26, 0.14);
}

.book-card-cover::before {
  content: '';
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 5px;
  pointer-events: none;
}

/* 五部分类 + 总书库配色 */
.cover-jing   { background: #26466b; }
.cover-shi    { background: #9a5b2e; }
.cover-zi     { background: #2f5340; }
.cover-ji     { background: #4c3a63; }
.cover-cong   { background: #4a4a4a; }
.cover-all    { background: #8a6d3b; }

.cover-title {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: "Kaiti SC", "STKaiti", "KaiTi", "TW-Kai", "DFKai-SB", serif;
  font-size: 23px;
  letter-spacing: 5px;
  max-height: 74%;
  overflow: hidden;
  white-space: nowrap;
}

/* 长书名降字号，避免竖排溢出 */
.cover-title.long { font-size: 17px; letter-spacing: 3px; }

/* 🔒 铁律：作者名必须置于封面【右下角】，严禁放正中间。
   原因：书名竖排居中（writing-mode: vertical-rl），长书名会向下压住正中的作者名。
   做法：竖排贴右缘（right），并让出右下角来源角标（📗/📘，right:7px bottom:7px）的位置（bottom:30px）。
   三处渲染共用本类 —— library.js（cardHTML / pendingCardHTML）+ book.js（heroHTML）；
   封面为 CSS 实时渲染（无图片产物），改此一处即全库统一生效，无需逐本重新生成。 */
.cover-author {
  position: absolute;
  right: 9px;
  bottom: 30px;
  writing-mode: vertical-rl;
  font-size: 11px;
  opacity: 0.86;
  max-height: 42%;
  overflow: hidden;
  white-space: nowrap;
}

.cover-cat {
  position: absolute;
  top: 9px;
  left: 9px;
  font-size: 10px;
  letter-spacing: 1px;
  opacity: 0.85;
  writing-mode: vertical-rl;
}

.cover-badge {
  position: absolute;
  right: 7px;
  bottom: 7px;
  font-size: 15px;
  line-height: 1;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.35));
}

/* 待入库卡片：左上角「推荐」星标 + 整体虚线感 */
.cover-star {
  position: absolute;
  left: 7px;
  top: 6px;
  font-size: 14px;
  line-height: 1;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.35));
}

.book-card.is-pending .book-card-cover {
  outline: 1px dashed rgba(255, 255, 255, 0.45);
  outline-offset: -5px;
}

/* 待入库卡片是 div 包裹（内含跳转用 <a> + 「复制入库命令」按钮） */
.book-card .card-main {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.card-cmd {
  margin-top: 6px;
  border: 1px dashed var(--line);
  background: transparent;
  color: var(--ink-soft);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.card-cmd:hover { color: var(--accent); border-color: var(--accent); }
.card-cmd.is-copied { color: #2f7a3e; border-color: #2f7a3e; }

/* 悬停显示的简介 */
.book-card-summary {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 26px 10px 10px;
  font-size: 11px;
  line-height: 1.5;
  color: #fff;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.72));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.book-card:hover .book-card-summary { opacity: 1; }

/* ---------- 卡片底部信息 ---------- */
.book-card-body {
  padding: 8px 2px 0;
}

.book-card-name {
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 1px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.book-card-meta {
  color: var(--ink-soft);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 2px;
}

.book-card-meta .src-tag { color: var(--accent); }

/* ---------- 分页（控件 CSS ≤ 50 行） ---------- */
.lib-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.lib-pagination[hidden] { display: none; }

.page-btn {
  border: 1px solid var(--line);
  background: var(--paper-light);
  color: var(--ink);
  min-width: 34px;
  height: 34px;
  padding: 0 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
}

.page-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }

.page-btn:disabled { opacity: 0.35; cursor: default; }

.page-num {
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink);
  min-width: 34px;
  height: 34px;
  padding: 0 6px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}

.page-num:hover { color: var(--accent); }

.page-num.is-active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.page-total {
  color: var(--ink-soft);
  font-size: 13px;
  margin-left: 4px;
}

/* ---------- 空状态 / 加载 ---------- */
.lib-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--ink-soft);
  padding: 60px 20px;
  font-size: 14px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) { .lib-grid { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 900px)  { .lib-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 720px)  { .lib-grid { grid-template-columns: repeat(3, 1fr); gap: 14px; } }
@media (max-width: 480px)  { .lib-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }

/* ============================================================
   书目详情页 · 大封面 hero
   ============================================================ */
.book-hero {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  margin: 16px 0 26px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.book-hero-cover {
  position: relative;
  flex-shrink: 0;
  width: 176px;
  aspect-ratio: 3 / 4;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f7f3ea;
  box-shadow: 0 4px 16px rgba(26, 26, 26, 0.16);
}

.book-hero-cover::before {
  content: '';
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 5px;
  pointer-events: none;
}

.book-hero-cover .cover-title { font-size: 30px; letter-spacing: 6px; }
.book-hero-cover .cover-title.long { font-size: 22px; letter-spacing: 4px; }

.book-hero-info { flex: 1; min-width: 0; }

.book-hero-title {
  font-family: var(--font-serif);
  font-size: 32px;
  letter-spacing: 4px;
  margin: 0 0 8px;
  line-height: 1.3;
}

.book-hero-author {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 12px;
}

.book-hero-summary {
  font-size: 14px;
  line-height: 1.9;
  margin: 0 0 14px;
  color: var(--ink);
}

.book-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.book-hero-tags span {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 12px;
  background: #f0ece6;
  color: var(--ink-soft);
}

.book-hero-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.btn-read {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 9px 22px;
  border-radius: 22px;
  font-size: 15px;
  letter-spacing: 1px;
  transition: background 0.2s ease;
}

.btn-read:hover { background: var(--accent-dark); }

@media (max-width: 560px) {
  .book-hero { gap: 18px; }
  .book-hero-cover { width: 120px; }
  .book-hero-cover .cover-title { font-size: 22px; letter-spacing: 4px; }
  .book-hero-title { font-size: 24px; letter-spacing: 2px; }
}