/* ═══════════════════════════════════════
   SETTINGS.CSS - 设置页（左右分栏）
   ═══════════════════════════════════════ */

/* ─── 设置页布局 ─── */
#view-settings {
  flex-direction: row !important;
  padding: 0 !important;
  overflow: hidden !important;
}

/* 左侧 tab 导航 - 约 80px */
#settings-nav {
  width: 72px;
  flex-shrink: 0;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  padding-top: 16px;
  overflow-y: auto;
}

.settings-nav-item {
  font-family: var(--font-title);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--ink);
  opacity: 0.35;
  padding: 14px 0 14px 16px;
  cursor: pointer;
  letter-spacing: 0.04em;
  border-left: 2px solid transparent;
  transition: opacity 0.2s, border-color 0.2s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  line-height: 1.4;
}

.settings-nav-item.active {
  opacity: 1;
  border-left-color: var(--ink);
}

/* 右侧内容区 - 独立滚动 */
#settings-content {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: calc(80px + env(safe-area-inset-bottom));
}

/* Tab 内容页 */
.stab-page {
  display: none;
}

.stab-page.active {
  display: block;
}

/* ─── 分区标签 ─── */
.sp-section-label {
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--ink-ghost);
  text-transform: uppercase;
  padding: 20px 20px 8px;
  border-bottom: 1px solid var(--rule);
}

/* ─── 行列表 ─── */
.sp-rows {
  border-bottom: 1px solid var(--rule);
  margin-bottom: 4px;
}

.sp-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 20px;
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
}

.sp-row:last-child {
  border-bottom: none;
}

.sp-row-info {
  flex: 1;
  min-width: 0;
}

.sp-row-label {
  font-size: 0.83rem;
  font-weight: 300;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.sp-row-sub {
  font-size: 0.65rem;
  font-weight: 200;
  color: var(--ink-faint);
  margin-top: 2px;
  letter-spacing: 0.03em;
  line-height: 1.6;
}

/* ─── 文字切换组（单选）─── */
.sp-toggle-group {
  display: flex;
  gap: 0;
  flex-shrink: 0;
}

.sp-toggle-btn {
  font-size: 0.72rem;
  font-weight: 300;
  font-family: var(--font-ui);
  color: var(--ink-faint);
  background: none;
  border: none;
  padding: 4px 8px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.sp-toggle-btn.active {
  color: var(--ink);
  font-weight: 400;
}

/* ─── 动作按钮 ─── */
.sp-action-btn {
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink-faint);
  background: none;
  border: 1px solid var(--rule);
  padding: 4px 12px;
  cursor: pointer;
  font-family: var(--font-ui);
  letter-spacing: 0.04em;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.sp-action-btn:hover {
  color: var(--ink);
  border-color: var(--ink-faint);
}

/* ─── 输入框（AI 配置）─── */
.sp-input {
  font-size: 0.78rem;
  font-weight: 300;
  font-family: var(--font-ui);
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  outline: none;
  padding: 4px 0;
  min-width: 0;
  width: 100%;
  max-width: 180px;
  letter-spacing: 0.02em;
  transition: border-color 0.2s;
}

.sp-input:focus {
  border-bottom-color: var(--ink);
}

.sp-input::placeholder {
  color: var(--ink-ghost);
  font-size: 0.68rem;
}

/* AI 配置 textarea */
.sp-textarea {
  font-size: 0.78rem;
  font-weight: 300;
  font-family: var(--font-body);
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  outline: none;
  padding: 4px 0;
  width: 100%;
  resize: none;
  line-height: 1.7;
  letter-spacing: 0.02em;
}

.sp-textarea::placeholder {
  color: var(--ink-ghost);
  font-size: 0.68rem;
}

/* AI 配置行 - textarea 独占一行 */
.sp-row.sp-full {
  flex-direction: column;
  align-items: stretch;
}

/* ─── 旧 overlay 相关（保留但不再使用）─── */
#settings-overlay {
  display: none !important;
}

/* ─── AI 应用按钮 ─── */
.sp-apply-btn {
  border-color: var(--ink-mid);
  color: var(--ink);
  font-weight: 400;
}

/* ─── 人设库 ─── */
.sp-persona-item {
  border-bottom: 1px solid var(--rule);
  padding: 12px 20px;
}

.sp-persona-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.sp-persona-active-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-ghost);
  flex-shrink: 0;
  transition: background 0.2s;
}

.sp-persona-item.active .sp-persona-active-dot {
  background: var(--ink);
}

.sp-persona-name-input {
  flex: 1;
  font-size: 0.83rem;
  font-weight: 300;
  font-family: var(--font-ui);
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  outline: none;
  padding: 2px 0;
  letter-spacing: 0.02em;
  transition: border-color 0.2s;
  cursor: pointer;
}

.sp-persona-name-input:focus {
  border-bottom-color: var(--rule);
  cursor: text;
}

.sp-persona-item.active .sp-persona-name-input {
  font-weight: 400;
}

.sp-persona-activate {
  font-size: 0.68rem;
  font-weight: 300;
  color: var(--ink-faint);
  cursor: pointer;
  letter-spacing: 0.04em;
  padding: 2px 6px;
  border: 1px solid transparent;
  transition: all 0.2s;
  flex-shrink: 0;
  white-space: nowrap;
}

.sp-persona-item.active .sp-persona-activate {
  color: var(--ink);
  border-color: var(--rule);
}

.sp-persona-delete {
  font-size: 0.68rem;
  color: var(--ink-ghost);
  cursor: pointer;
  padding: 2px 4px;
  flex-shrink: 0;
}

.sp-persona-content-input {
  width: 100%;
  font-size: 0.75rem;
  font-weight: 200;
  font-family: var(--font-body);
  color: var(--ink-mid);
  background: transparent;
  border: none;
  border-top: 1px solid var(--rule);
  outline: none;
  padding: 8px 0 4px;
  resize: none;
  line-height: 1.65;
  letter-spacing: 0.02em;
}

.sp-persona-content-input::placeholder {
  color: var(--ink-ghost);
}

.sp-persona-add {
  font-size: 0.75rem;
  font-weight: 300;
  color: var(--ink-faint);
  padding: 14px 20px;
  cursor: pointer;
  letter-spacing: 0.04em;
  border-top: 1px solid var(--rule);
  transition: color 0.2s;
}

.sp-persona-add:hover {
  color: var(--ink);
}

/* ─── 配色 chip 行 ─── */
.sp-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 20px 16px;
}

/* ═══ 字体系统（三槽 + 方案管理 + 字体库）═══ */

/* 已保存方案横排 */
.font-scheme-row {
  display: flex;
  gap: 10px;
  padding: 4px 20px 12px;
  overflow-x: auto;
  scrollbar-width: none;
  min-height: 36px;
}
.font-scheme-row::-webkit-scrollbar { display: none; }

.font-scheme-chip {
  font-size: 0.68rem;
  font-weight: 300;
  color: var(--ink-faint);
  padding: 5px 12px;
  border: 1px solid var(--rule);
  border-radius: 20px;
  cursor: pointer;
  background: transparent;
  font-family: var(--font-ui);
  transition: all 0.18s;
  white-space: nowrap;
  flex-shrink: 0;
  position: relative;
}
.font-scheme-chip.active {
  border-color: var(--ink);
  color: var(--ink);
}
.font-scheme-chip .fsc-del {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-faint);
  color: var(--bg);
  font-size: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.15s;
  border: none;
  cursor: pointer;
  line-height: 1;
}
.font-scheme-chip:hover .fsc-del { opacity: 1; }

/* 三槽卡片 */
.font-slots-card {
  margin: 0 20px 12px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 16px;
}
.font-slot-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.font-slot-label {
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  white-space: nowrap;
  min-width: 28px;
}
.font-select {
  flex: 1;
  border: none;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  outline: none;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--ink);
  padding: 4px 0 5px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23b8b5ae' stroke-width='1.2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 4px center;
  padding-right: 18px;
}
.font-select:focus { border-bottom-color: var(--ink); }

/* 操作行 */
.font-action-row {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
}
.font-action-btn {
  font-size: 0.7rem;
  font-weight: 300;
  color: var(--ink-faint);
  padding: 5px 12px;
  border: 1px solid var(--rule);
  border-radius: 20px;
  cursor: pointer;
  background: transparent;
  font-family: var(--font-ui);
  transition: all 0.18s;
}
.font-action-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* 字体库弹层 */
#font-lib-overlay { display: none; }
#font-lib-overlay.open { display: flex !important; }
.font-lib-popup {
  background: var(--bg);
  border-radius: 20px 20px 0 0;
  padding: 24px 24px 32px;
  width: 100%;
  max-width: 480px;
  max-height: 80vh;
  overflow-y: auto;
}
.font-lib-title {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
  margin-bottom: 16px;
}
.font-lib-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 16px;
}
.font-lib-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}
.font-lib-item-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.font-lib-item-name {
  font-size: 0.82rem;
  font-weight: 300;
  color: var(--ink);
}
.font-lib-item-url {
  font-size: 0.62rem;
  font-weight: 200;
  color: var(--ink-ghost);
  font-family: monospace;
}
.font-lib-item-del {
  font-size: 0.68rem;
  font-weight: 300;
  color: var(--ink-faint);
  padding: 4px 10px;
  border: 1px solid var(--rule);
  border-radius: 20px;
  cursor: pointer;
  background: transparent;
  font-family: var(--font-ui);
  transition: all 0.18s;
  flex-shrink: 0;
}
.font-lib-item-del:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.font-lib-close {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 10px;
  border: none;
  border-top: 1px solid var(--rule);
  background: transparent;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 300;
  color: var(--ink-faint);
  cursor: pointer;
  transition: color 0.15s;
}

/* 添加外链 */
.font-custom-section {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}
.font-custom-label {
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.font-url-input {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: transparent;
  outline: none;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink);
  padding: 8px 10px;
  resize: none;
  line-height: 1.6;
  transition: border-color 0.2s;
}
.font-url-input:focus { border-color: var(--ink); }
.font-url-row {
  display: flex;
  gap: 6px;
  align-items: center;
}
.font-name-input {
  width: 80px;
  border: none;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  outline: none;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink);
  padding: 4px 0 5px;
  transition: border-color 0.2s;
  flex-shrink: 0;
}
.font-name-input:focus { border-bottom-color: var(--ink); }
.font-url-add-btn {
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink-faint);
  padding: 4px 12px;
  border: 1px solid var(--rule);
  border-radius: 20px;
  cursor: pointer;
  background: transparent;
  font-family: var(--font-ui);
  transition: all 0.18s;
  white-space: nowrap;
  flex-shrink: 0;
}
.font-url-add-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.font-custom-hint {
  font-size: 0.6rem;
  font-weight: 200;
  color: var(--ink-ghost);
  margin-top: 6px;
  line-height: 1.6;
}

/* 字体文件上传行 */
.font-file-row {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
.font-file-label {
  display: inline-flex;
  align-items: center;
  flex: 1;
  min-width: 0;
  border: 1px dashed var(--rule);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink-faint);
  transition: border-color 0.2s, color 0.2s;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.font-file-label:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* 字体方案命名弹窗 */
#font-scheme-name-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 800;
  display: none;
  align-items: center;
  justify-content: center;
}
#font-scheme-name-overlay.open { display: flex; }
.font-scheme-name-popup {
  background: var(--bg);
  border-radius: 14px;
  padding: 24px;
  width: 280px;
  max-width: 90vw;
}
.font-scheme-name-title {
  font-family: var(--font-title);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.font-scheme-name-input {
  width: 100%;
  box-sizing: border-box;
  border: none;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  outline: none;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 300;
  color: var(--ink);
  padding: 6px 0;
  margin-bottom: 18px;
  transition: border-color 0.2s;
}
.font-scheme-name-input:focus { border-bottom-color: var(--ink); }
.font-scheme-name-btns {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}
.font-scheme-name-btns button {
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink-faint);
  padding: 5px 14px;
  border: 1px solid var(--rule);
  border-radius: 20px;
  cursor: pointer;
  background: transparent;
  font-family: var(--font-ui);
  transition: all 0.18s;
}
.font-scheme-name-btns button:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* 配色色板预设 */
.sp-swatch-presets {
  display: flex;
  gap: 10px;
  padding: 12px 20px 8px;
  flex-wrap: wrap;
}

.sp-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--rule);
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.15s, border-color 0.15s;
}

.sp-swatch:hover {
  transform: scale(1.15);
  border-color: var(--ink-mid);
}

/* 已保存配色 chip */
.sp-color-chip {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--rule);
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: transform 0.15s;
}

.sp-color-chip.active {
  border-color: var(--ink);
  transform: scale(1.1);
}

.sp-color-chip .chip-del {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 12px;
  height: 12px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 50%;
  font-size: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-faint);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
}

.sp-color-chip:hover .chip-del {
  opacity: 1;
}

/* ─── 封面风格按钮激活态 ─── */
.cover-style-btn.active {
  border-color: var(--ink);
  color: var(--ink);
  font-weight: 400;
}

/* ─── 布尔开关按钮（开启/关闭两态） ─── */
/* 基础态（关闭）：空心边框，文字暗淡 */
.sp-bool-btn {
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink-faint);
  background: none;
  border: 1px solid var(--rule);
  padding: 4px 12px;
  cursor: pointer;
  font-family: var(--font-ui);
  letter-spacing: 0.04em;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
  border-radius: 2px;
}

/* 激活态（开启）：实心背景，文字反色 */
.sp-bool-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
  font-weight: 400;
}

.sp-bool-btn:hover:not(.active) {
  border-color: var(--ink-faint);
  color: var(--ink-mid);
}

/* ─── 存储用量面板 ─── */
.storage-usage-card {
  background: var(--card-bg, rgba(0,0,0,0.03));
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 14px 16px;
  margin-top: 4px;
}

.storage-usage-bar-wrap {
  height: 6px;
  background: var(--rule);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.storage-usage-bar {
  height: 100%;
  background: var(--ink-mid);
  border-radius: 3px;
  width: 0%;
  transition: width 0.4s ease;
}

.storage-usage-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  font-weight: 300;
  color: var(--ink-faint);
  letter-spacing: 0.03em;
  margin-bottom: 10px;
}

.storage-breakdown {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
  border-top: 1px solid var(--rule);
  padding-top: 10px;
}

.storage-breakdown-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.68rem;
  font-weight: 300;
  color: var(--ink-mid);
}

.storage-breakdown-label {
  width: 80px;
  flex-shrink: 0;
  color: var(--ink-faint);
}

.storage-breakdown-bar-wrap {
  flex: 1;
  height: 3px;
  background: var(--rule);
  border-radius: 2px;
  overflow: hidden;
}

.storage-breakdown-bar {
  height: 100%;
  border-radius: 2px;
  background: var(--ink-ghost);
}

.storage-breakdown-size {
  width: 52px;
  text-align: right;
  flex-shrink: 0;
}

/* 危险操作按钮 */
.sp-action-danger {
  color: #c44;
  border-color: rgba(204,68,68,0.3);
}

.sp-action-danger:hover {
  color: #e33;
  border-color: #e33;
  background: rgba(204,68,68,0.06);
}

/* ─── 书目信息面板 ─── */
#book-meta-panel {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 400;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#book-meta-panel.open {
  display: flex;
}

#book-meta-popup {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 10px;
  width: 100%;
  max-width: 480px;
  max-height: 82vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 20px;
}

#book-meta-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

#book-meta-title {
  font-family: var(--font-title);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.04em;
}

.book-meta-close-btn {
  font-size: 0.8rem;
  color: var(--ink-faint);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 6px;
  font-family: var(--font-ui);
  transition: color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.book-meta-close-btn:hover {
  color: var(--ink);
}

.book-meta-section-label {
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-ghost);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 10px;
}

.book-meta-fields {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.book-meta-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.book-meta-label {
  width: 52px;
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 300;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
  padding-top: 6px;
}

.book-meta-input,
.book-meta-textarea {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  outline: none;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 300;
  color: var(--ink);
  padding: 4px 2px;
  transition: border-color 0.15s;
  line-height: 1.5;
}

.book-meta-input:focus,
.book-meta-textarea:focus {
  border-bottom-color: var(--ink-mid);
}

.book-meta-input::placeholder,
.book-meta-textarea::placeholder {
  color: var(--ink-ghost);
}

.book-meta-textarea {
  resize: none;
  width: 100%;
}

.book-meta-radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 4px;
}

.book-meta-radio-opt {
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink-mid);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  letter-spacing: 0.04em;
}

.book-meta-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

.book-meta-ai-btn {
  font-size: 0.7rem;
  font-weight: 300;
  color: var(--ink-mid);
  background: transparent;
  border: 1px solid var(--rule);
  padding: 5px 12px;
  cursor: pointer;
  font-family: var(--font-ui);
  border-radius: 3px;
  transition: color 0.15s, border-color 0.15s;
  letter-spacing: 0.04em;
  -webkit-tap-highlight-color: transparent;
}

.book-meta-ai-btn:hover {
  color: var(--ink);
  border-color: var(--ink-faint);
}

.book-meta-ai-btn:disabled {
  opacity: 0.45;
  cursor: default;
}

.book-meta-cancel-btn,
.book-meta-save-btn {
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--ink-faint);
  background: none;
  border: 1px solid var(--rule);
  padding: 5px 14px;
  cursor: pointer;
  font-family: var(--font-ui);
  border-radius: 3px;
  transition: color 0.15s, border-color 0.15s;
  letter-spacing: 0.04em;
  -webkit-tap-highlight-color: transparent;
}

.book-meta-cancel-btn:hover {
  color: var(--ink);
  border-color: var(--ink-faint);
}

.book-meta-save-btn {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
  font-weight: 400;
}

.book-meta-save-btn:hover {
  opacity: 0.85;
}

/* ─── 书封书目角标 ─── */
.book-meta-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(0,0,0,0.18);
  color: rgba(255,255,255,0.85);
  font-size: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  transition: background 0.15s;
  font-style: italic;
  font-weight: 600;
  backdrop-filter: blur(2px);
}

.book-meta-badge:hover {
  background: rgba(0,0,0,0.38);
}