/* ═══════════════════════════════════════════════════════════════
   专栏空间 (Column Space) - 样式优化版 v2
   优化：
     1. 封面标题字体增大，增加美观装饰
     2. 图片使用 cover 填满容器
     3. 调整封面页布局比例
   ═══════════════════════════════════════════════════════════════ */

/* ─── 模态框基础 ─── */
.column-space-modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 100000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease;
}

.column-space-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(10, 14, 39, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.column-space-container {
    position: relative;
    width: 100%; height: 100%;
    max-width: 1400px; max-height: 90vh;
    margin: auto;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.6), 
                0 0 0 1px rgba(102, 126, 234, 0.1);
}

/* ─── 加载状态 ─── */
.column-space-loading {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%; height: 100%;
    min-height: 400px;
}

.spacetime-fold-icon {
    margin-bottom: 32px;
    filter: drop-shadow(0 0 30px rgba(102, 126, 234, 0.4));
}

.spacetime-fold-text {
    font-size: 20px;
    color: #d4c4a8;
    letter-spacing: 2px;
    font-weight: 300;
    text-align: center;
    animation: textPulse 2s ease-in-out infinite;
}

.spacetime-fold-dots {
    display: flex;
    gap: 8px;
    margin-top: 20px;
}

.spacetime-fold-dots span {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #667eea;
    animation: dotPulse 1.4s ease-in-out infinite;
}

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

@keyframes textPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

@keyframes dotPulse {
    0%, 100% { transform: scale(0.6); opacity: 0.4; }
    50% { transform: scale(1); opacity: 1; }
}

/* ─── 空状态 / 错误状态 ─── */
.column-space-empty,
.column-space-error {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%; height: 100%;
    min-height: 400px;
    padding: 40px;
}

.empty-icon, .error-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.6;
}

.empty-text, .error-text {
    font-size: 18px;
    color: #d4c4a8;
    margin-bottom: 12px;
}

.error-detail {
    font-size: 13px;
    color: #ef4444;
    opacity: 0.8;
    max-width: 400px;
    text-align: center;
    word-break: break-word;
}

.btn-close-space {
    margin-top: 24px;
    padding: 10px 28px;
    border: 1px solid rgba(102, 126, 234, 0.4);
    background: rgba(102, 126, 234, 0.1);
    color: #d4c4a8;
    border-radius: 24px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.btn-close-space:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.6);
    transform: translateY(-2px);
}

/* ─── 目录视图 ─── */
.column-space-directory {
    position: relative;
    width: 100%; height: 100%;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #0a0e27 0%, #11183a 50%, #0a0e27 100%);
    transition: opacity 0.4s ease;
    overflow: hidden;
}

.directory-header {
    display: flex;
    align-items: center;
    padding: 24px 32px;
    border-bottom: 1px solid rgba(102, 126, 234, 0.15);
    background: rgba(10, 14, 39, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex-shrink: 0;
}

.btn-back-close {
    width: 40px; height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(197, 160, 89, 0.3);
    background: rgba(197, 160, 89, 0.08);
    color: #c5a059;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    margin-right: 20px;
    flex-shrink: 0;
}

.btn-back-close:hover {
    background: rgba(197, 160, 89, 0.2);
    transform: rotate(90deg);
    border-color: rgba(197, 160, 89, 0.5);
}

.directory-title {
    flex: 1;
    font-size: 22px;
    font-weight: 500;
    color: #d4c4a8;
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
}

.title-icon {
    color: #c5a059;
    font-size: 24px;
}

.title-sub {
    font-size: 14px;
    color: #667eea;
    font-weight: 400;
    letter-spacing: 1px;
    margin-left: 8px;
    padding-left: 12px;
    border-left: 1px solid rgba(102, 126, 234, 0.3);
}

.directory-list {
    flex: 1;
    overflow-y: auto;
    padding: 20px 32px 40px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.directory-list::-webkit-scrollbar {
    width: 6px;
}

.directory-list::-webkit-scrollbar-track {
    background: transparent;
}

.directory-list::-webkit-scrollbar-thumb {
    background: rgba(102, 126, 234, 0.3);
    border-radius: 3px;
}

.directory-list::-webkit-scrollbar-thumb:hover {
    background: rgba(102, 126, 234, 0.5);
}

/* ─── 目录条目 ─── */
.directory-item {
    position: relative;
    display: flex;
    align-items: center;
    padding: 20px 24px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(102, 126, 234, 0.08);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    animation: slideInUp 0.5s ease backwards;
}

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

.directory-item:hover {
    background: rgba(102, 126, 234, 0.08);
    border-color: rgba(102, 126, 234, 0.25);
    transform: translateX(8px);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.15);
}

.directory-item.latest {
    background: rgba(197, 160, 89, 0.06);
    border-color: rgba(197, 160, 89, 0.2);
}

.directory-item.latest:hover {
    background: rgba(197, 160, 89, 0.12);
    border-color: rgba(197, 160, 89, 0.35);
    box-shadow: 0 4px 20px rgba(197, 160, 89, 0.15);
}

.directory-item.error {
    opacity: 0.5;
    cursor: not-allowed;
}

.item-glow {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: 12px;
    opacity: 0;
    transition: opacity 0.4s ease;
    background: radial-gradient(circle at 50% 0%, rgba(102, 126, 234, 0.15), transparent 70%);
    pointer-events: none;
}

.directory-item:hover .item-glow {
    opacity: 1;
}

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

.item-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.label-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.5px;
    background: rgba(102, 126, 234, 0.15);
    color: #667eea;
    border: 1px solid rgba(102, 126, 234, 0.25);
}

.directory-item.latest .label-badge {
    background: rgba(197, 160, 89, 0.15);
    color: #c5a059;
    border-color: rgba(197, 160, 89, 0.3);
}

.latest-star {
    color: #c5a059;
    font-size: 14px;
    animation: starTwinkle 2s ease-in-out infinite;
}

@keyframes starTwinkle {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

.item-title {
    font-size: 17px;
    font-weight: 500;
    color: #e0e0e0;
    line-height: 1.5;
    margin-bottom: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.item-excerpt {
    font-size: 13px;
    color: #8b92b4;
    line-height: 1.6;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.item-error {
    font-size: 12px;
    color: #ef4444;
    margin-top: 4px;
    opacity: 0.8;
}

.item-arrow {
    flex-shrink: 0;
    margin-left: 16px;
    color: #667eea;
    opacity: 0.4;
    transition: all 0.3s ease;
}

.directory-item:hover .item-arrow {
    opacity: 1;
    transform: translateX(4px);
}

/* ─── 阅读视图 ─── */
.column-space-reader {
    position: relative;
    width: 100%; height: 100%;
    display: none;
    flex-direction: column;
    background: linear-gradient(135deg, #0a0e27 0%, #11183a 50%, #0a0e27 100%);
    transition: opacity 0.4s ease;
    overflow: hidden;
}

.reader-toolbar {
    display: flex;
    align-items: center;
    padding: 16px 32px;
    border-bottom: 1px solid rgba(102, 126, 234, 0.15);
    background: rgba(10, 14, 39, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex-shrink: 0;
    gap: 16px;
}

.btn-back-directory {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid rgba(102, 126, 234, 0.3);
    background: rgba(102, 126, 234, 0.08);
    color: #d4c4a8;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.btn-back-directory:hover {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.5);
    transform: translateX(-2px);
}

.reader-title {
    flex: 1;
    font-size: 15px;
    font-weight: 500;
    color: #d4c4a8;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding: 0 16px;
}

.reader-pagination {
    font-size: 13px;
    color: #667eea;
    font-weight: 500;
    letter-spacing: 1px;
    flex-shrink: 0;
    min-width: 100px;
    text-align: right;
}

/* ─── 书本容器 ─── */
.reader-book {
    flex: 1;
    position: relative;
    overflow: hidden;
    perspective: 1500px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px 24px;  /* 减小内边距，给内容更多空间 */
}

.book-pages {
    position: relative;
    width: 100%;
    max-width: 800px;
    height: 100%;
    max-height: 72vh;  /* 稍微增大 */
    transform-style: preserve-3d;
}

/* ─── 单页样式 ─── */
.book-page {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, #12183a 0%, #1a2048 100%);
    border-radius: 12px;
    box-shadow: 
        0 4px 30px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(102, 126, 234, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    overflow: hidden;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.6s ease;
    transform-origin: left center;
    opacity: 0;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    visibility: hidden;
}

.book-page.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0) rotateY(0);
    z-index: 10;
    visibility: visible;
}

.book-page.prev {
    opacity: 0;
    transform: translateX(-30%) rotateY(25deg) scale(0.9);
    pointer-events: none;
    visibility: hidden;
}

.book-page.next {
    opacity: 0;
    transform: translateX(30%) rotateY(-25deg) scale(0.9);
    pointer-events: none;
    visibility: hidden;
}

/* 页面阴影效果 */
.page-shadow {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    border-radius: 12px;
    box-shadow: inset -30px 0 60px rgba(0, 0, 0, 0.2);
    z-index: 2;
}

.page-content {
    flex: 1;
    overflow-y: auto;
    padding: 0;  /* 封面页内部自己控制padding */
    position: relative;
    z-index: 1;
}

/* 自定义滚动条 */
.page-content::-webkit-scrollbar {
    width: 4px;
}

.page-content::-webkit-scrollbar-track {
    background: transparent;
}

.page-content::-webkit-scrollbar-thumb {
    background: rgba(102, 126, 234, 0.3);
    border-radius: 2px;
}

.page-number {
    position: absolute;
    bottom: 16px;
    right: 24px;
    font-size: 12px;
    color: rgba(102, 126, 234, 0.5);
    font-weight: 500;
    letter-spacing: 1px;
    z-index: 3;
}

/* ═══════════════════════════════════════════════════════════════
   【优化】封面页样式 - 单标题布局：标题在上方，领域紧跟下方，北极星在底部
   ═══════════════════════════════════════════════════════════════ */

.page-cover {
    display: flex;
    flex-direction: column;
    height: 100%;
    text-align: center;
    overflow: hidden;
    box-sizing: border-box;
    position: relative;
}

/* ─── 顶部标题区域 ─── */
/* 给 .page-cover 内的所有可能标题元素添加大标题样式 */
.page-cover > h2,
.page-cover > .cover-subtitle,
.page-cover > .cover-title,
.cover-header .cover-title,
.cover-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: #f0e6d3;
    line-height: 1.3;
    margin: 0;
    padding: 32px 48px 0;
    text-shadow: 
        0 2px 10px rgba(0, 0, 0, 0.5),
        0 0 40px rgba(197, 160, 89, 0.15);
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    letter-spacing: 1px;
    text-align: center;
}

/* 领域标签 - 紧跟标题下方，确保可见 */
.page-cover > .cover-meta,
.cover-header .cover-meta,
.cover-title-area .cover-meta {
    font-size: 15px;
    color: #c5a059;
    letter-spacing: 2px;
    font-weight: 500;
    text-transform: uppercase;
    opacity: 1;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
    margin-top: 12px;
    margin-bottom: 16px;
    padding: 0 48px;
    text-align: center;
    display: block;
    visibility: visible;
    line-height: 1.5;
}

/* ─── 图片区域：填满中间空间 ─── */
.cover-image-wrapper {
    width: 100%;
    flex: 1;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

/* 图片填满容器，保持比例，允许少量裁剪 */
.cover-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* 图片上的渐变遮罩 */
.cover-image-wrapper::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 30%;
    background: linear-gradient(to bottom, 
        transparent 0%, 
        rgba(18, 24, 58, 0.3) 50%,
        rgba(18, 24, 58, 0.6) 100%);
    pointer-events: none;
}

/* ─── 底部区域：包含领域和装饰 ─── */
/* 如果 .cover-title-area 还在HTML中，改为正常文档流 */
.cover-title-area {
    position: relative;
    bottom: auto;
    left: auto;
    right: auto;
    padding: 16px 48px 32px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: transparent;
}

/* 隐藏原来位于 .cover-title-area 内的大标题（如果还存在） */
.cover-title-area .cover-title {
    display: none;
}

/* 如果 .cover-meta 在 .cover-title-area 内，确保它显示 */
.cover-title-area .cover-meta {
    display: block;
    margin-top: 0;
    margin-bottom: 16px;
    visibility: visible;
    opacity: 1;
}

/* 装饰线 */
.cover-decoration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 0;
}

.deco-line {
    width: 60px;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(197, 160, 89, 0.6), transparent);
}

.deco-star {
    color: #c5a059;
    font-size: 20px;
    opacity: 0.8;
    text-shadow: 0 0 10px rgba(197, 160, 89, 0.3);
}
/* ─── 内容页样式 ─── */
.page-content-body {
    font-size: 16px;
    line-height: 1.9;
    color: #c5c8d6;
    padding: 40px 48px;  /* 内容页的内边距 */
}

.page-content-body p {
    margin-bottom: 1.2em;
    text-align: justify;
}

.page-content-body h1,
.page-content-body h2,
.page-content-body h3,
.page-content-body h4,
.page-content-body h5,
.page-content-body h6 {
    color: #d4c4a8;
    margin: 1.5em 0 0.8em;
    line-height: 1.4;
}

.page-content-body h1 {
    font-size: 1.5em;
    border-left: 4px solid #c5a059;
    padding-left: 12px;
}

.page-content-body h2 {
    font-size: 1.3em;
    border-left: 3px solid rgba(197, 160, 89, 0.6);
    padding-left: 10px;
}

.page-content-body h3 {
    font-size: 1.15em;
    color: #d4c4a8;
}

.page-content-body strong,
.page-content-body b {
    color: #d4c4a8;
    font-weight: 600;
}

.page-content-body blockquote {
    margin: 1.2em 0;
    padding: 12px 20px;
    border-left: 3px solid #667eea;
    background: rgba(102, 126, 234, 0.08);
    color: #b0b8d0;
    font-style: italic;
    border-radius: 0 8px 8px 0;
}

.page-content-body ul,
.page-content-body ol {
    margin: 1em 0;
    padding-left: 2em;
}

.page-content-body li {
    margin-bottom: 0.5em;
}

.page-content-body code {
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.9em;
    color: #e0c080;
}

.page-content-body pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1em 0;
}

.page-content-body pre code {
    background: none;
    padding: 0;
}

.page-content-body hr {
    border: none;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(197, 160, 89, 0.3), transparent);
    margin: 2em 0;
}

.page-content-body a {
    color: #667eea;
    text-decoration: none;
    border-bottom: 1px solid rgba(102, 126, 234, 0.3);
    transition: border-color 0.2s ease;
}

.page-content-body a:hover {
    border-bottom-color: #667eea;
}

/* ─── 导航按钮 ─── */
.reader-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    padding: 16px 32px;
    border-top: 1px solid rgba(102, 126, 234, 0.15);
    background: rgba(10, 14, 39, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex-shrink: 0;
}

.btn-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 24px;
    border: 1px solid rgba(102, 126, 234, 0.3);
    background: rgba(102, 126, 234, 0.08);
    color: #d4c4a8;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
}

.btn-nav:hover:not(:disabled) {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
}

.btn-nav:active:not(:disabled) {
    transform: translateY(0);
}

.btn-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-nav.prev svg {
    transition: transform 0.3s ease;
}

.btn-nav.prev:hover:not(:disabled) svg {
    transform: translateX(-3px);
}

.btn-nav.next svg {
    transition: transform 0.3s ease;
}

.btn-nav.next:hover:not(:disabled) svg {
    transform: translateX(3px);
}

/* ─── 翻页动画 ─── */
.book-page.flip-left-out {
    animation: flipLeftOut 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.book-page.flip-left-in {
    animation: flipLeftIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.book-page.flip-right-in {
    animation: flipRightIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes flipLeftOut {
    from { transform: translateX(0) rotateY(0); opacity: 1; visibility: visible; }
    to { transform: translateX(-100%) rotateY(-90deg); opacity: 0; visibility: hidden; }
}

@keyframes flipLeftIn {
    from { transform: translateX(100%) rotateY(90deg); opacity: 0; visibility: hidden; }
    to { transform: translateX(0) rotateY(0); opacity: 1; visibility: visible; }
}

@keyframes flipRightIn {
    from { transform: translateX(-100%) rotateY(-90deg); opacity: 0; visibility: hidden; }
    to { transform: translateX(0) rotateY(0); opacity: 1; visibility: visible; }
}

/* ═══════════════════════════════════════════════════════════════
   响应式适配 - 移动端
   ═══════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .column-space-container {
        max-height: 100vh;
        border-radius: 0;
    }

    .directory-header {
        padding: 16px 20px;
    }

    .directory-title {
        font-size: 18px;
    }

    .title-sub {
        display: none;
    }

    .directory-list {
        padding: 16px 20px 30px;
    }

    .directory-item {
        padding: 16px 18px;
    }

    .item-title {
        font-size: 15px;
    }

    .reader-toolbar {
        padding: 12px 16px;
    }

    .reader-title {
        font-size: 13px;
        padding: 0 8px;
    }

    .reader-book {
        padding: 8px 12px;
    }

    .book-pages {
        max-height: 78vh;
    }

    /* 移动端封面页 */
    .page-cover > h2,
    .page-cover > .cover-subtitle,
    .page-cover > .cover-title,
    .cover-header .cover-title,
    .cover-header h2 {
        font-size: 24px;
        padding: 20px 24px 0;
    }

    .page-cover > .cover-meta,
    .cover-header .cover-meta,
    .cover-title-area .cover-meta {
        font-size: 13px;
        margin-top: 8px;
        margin-bottom: 12px;
        padding: 0 24px;
        opacity: 1;
        visibility: visible;
        display: block;
    }

    .cover-image-wrapper::after {
        height: 40%;
    }

    .cover-title-area {
        padding: 12px 24px 24px;
    }

    .deco-line {
        width: 40px;
    }
@media (max-width: 480px) {
    .page-content-body {
        font-size: 14px;
        line-height: 1.8;
        padding: 20px 16px;
    }

    .page-cover > h2,
    .page-cover > .cover-subtitle,
    .page-cover > .cover-title,
    .cover-header .cover-title,
    .cover-header h2 {
        font-size: 20px;
    }

    .cover-title-area {
        padding: 10px 20px 20px;
    }

    .page-cover > .cover-meta,
    .cover-header .cover-meta,
    .cover-title-area .cover-meta {
        font-size: 12px;
        margin-top: 6px;
        margin-bottom: 10px;
        padding: 0 16px;
        opacity: 1;
        visibility: visible;
        display: block;
    }
    

    .btn-back-directory span {
        display: none;
    }

    .reader-pagination {
        min-width: auto;
        font-size: 12px;
    }
}