/* ===========================================================================
   Lumina Blog v1.4.0 · v14.css
   新功能的前台样式：阅读进度条 / 阅读工具条 / 目录 / 相关文章 / 灯箱 /
   代码高亮 / 归档页 / 标签云 / 离线页。
   仍然遵守最初的设计规范：纯色（零渐变）· 淡色系 · 极简线条与色块。
   所有颜色都取自 base.css 的 CSS 变量，所以亮色、暗色自动跟随。
   =========================================================================== */

/* ---------------- 阅读进度条（页面最顶部一条细线） ---------------- */
.lb-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    background: var(--primary);
    z-index: 90;
    border-radius: 0 2px 2px 0;
    transition: width .12s linear;
    pointer-events: none;
}

/* ---------------- 右下角统一工具栏（v1.5.6：3 个扁平胶囊按钮） ---------------- */
.lb-reader {
    position: fixed;
    right: 16px;
    bottom: 18px;
    z-index: 80;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
    align-items: center;
    max-width: calc(100vw - 32px);
}

.lb-reader-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    min-width: 58px;
    height: 32px;
    padding: 0 13px;
    border: 1px solid var(--border);
    /* 圆角 = 高度的一半 ⇒ 标准胶囊形（扁的，不是圆球） */
    border-radius: 16px;
    background: var(--card);
    color: var(--text);
    font-family: inherit;
    font-size: .78rem;
    font-weight: 600;
    line-height: 1;
    letter-spacing: .01em;
    cursor: pointer;
    box-shadow: none;
    transition: background-color .16s ease, border-color .16s ease, transform .16s ease;
}

.lb-reader-btn:hover {
    background: var(--primary-soft);
    border-color: var(--primary-soft);
    color: var(--primary-strong);
}

.lb-reader-btn:active {
    transform: scale(.96);
}

.lb-reader-btn.is-on {
    background: var(--primary-bg, var(--primary));
    border-color: var(--primary-bg, var(--primary));
    color: var(--on-primary, #fff);
}

.lb-reader-panel {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: 0 6px 20px rgba(15, 23, 42, .10);
}

.lb-reader-panel.is-open {
    display: flex;
}

html[data-anim="off"] .lb-reader-btn {
    transition: none;
}

/* ---------------- 护眼模式（米黄底，纯色） ---------------- */
body.lb-eyecare {
    --bg: #f6f1e3;
    --bg-soft: #efe8d6;
    --card: #fbf7ec;
    --text: #3f3a2e;
    --muted: #7d7461;
    --border: #e3dac4;
}

/* ---------------- 宽屏阅读 ---------------- */
body.lb-wide .wrap {
    --content-width: 1320px;
}

/* ---------------- 字号调节（只影响正文与列表字号，不动结构） ---------------- */
body {
    --lb-reader-scale: 1;
}

.article-body,
.post-excerpt,
.post-card .post-title {
    font-size: calc(1em * var(--lb-reader-scale));
}

/* ---------------- 图片懒加载的柔和出现 ---------------- */
img.lb-lazy {
    opacity: 0;
    transition: opacity .3s ease;
}

img.lb-lazy.lb-lazy-done {
    opacity: 1;
}

/* ---------------- 灯箱（点击图片放大） ---------------- */
.lb-lightbox {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 22px;
    background: rgba(15, 23, 42, .88);
    cursor: zoom-out;
}

.lb-lightbox img {
    max-width: 96vw;
    max-height: 90vh;
    border-radius: var(--radius-sm);
    background: #fff;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .35);
}

.lb-lightbox-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, .92);
    color: #1e293b;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
}

.article-body img {
    cursor: zoom-in;
}

/* ---------------- 代码块与高亮（自带，零依赖） ---------------- */
.article-body pre {
    position: relative;
    margin: 0 0 1.2em;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-soft);
    color: var(--text);
    overflow-x: auto;
    font-size: .88em;
    line-height: 1.62;
}

.article-body pre code {
    display: block;
    white-space: pre;
    background: none;
    padding: 0;
}

.article-body p > code,
.article-body li > code {
    padding: 2px 6px;
    border-radius: 6px;
    background: var(--primary-soft);
    color: var(--primary-strong);
    font-size: .9em;
}

.tok-key { color: #b4467a; font-weight: 600; }
.tok-str { color: #2e7d5b; }
.tok-num { color: #b06000; }
.tok-cmt { color: var(--muted); font-style: italic; }
.tok-fn  { color: #3f5fbf; }

:root[data-theme="dark"] .tok-key,
:root[data-scheme-auto="dark"] .tok-key { color: #f3a0c8; }
:root[data-theme="dark"] .tok-str,
:root[data-scheme-auto="dark"] .tok-str { color: #93dcb5; }
:root[data-theme="dark"] .tok-num,
:root[data-scheme-auto="dark"] .tok-num { color: #f0c079; }
:root[data-theme="dark"] .tok-fn,
:root[data-scheme-auto="dark"] .tok-fn { color: #a8c2ff; }

.lb-copy-code {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 3px 9px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--card);
    color: var(--muted);
    font-family: inherit;
    font-size: .74rem;
    cursor: pointer;
}

.lb-copy-code:hover {
    color: var(--primary-strong);
    border-color: var(--primary);
}

/* ---------------- 文章目录 ---------------- */
.lb-toc {
    margin: 0 0 20px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-soft);
}

.lb-toc-title {
    margin: 0 0 8px;
    font-size: .92rem;
    color: var(--muted);
    font-weight: 600;
}

.lb-toc-list {
    margin: 0;
    padding-left: 18px;
    font-size: .92rem;
}

.lb-toc-list li {
    margin: 3px 0;
}

.lb-toc-l3 {
    list-style: circle;
    margin-left: 12px;
}

/* ---------------- 相关文章 ---------------- */
.lb-related {
    margin-top: 20px;
}

.lb-related-title {
    margin: 0 0 10px;
    font-size: 1rem;
}

.lb-related-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.lb-related-item {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-soft);
    transition: transform .16s ease, border-color .16s ease;
}

.lb-related-item:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.lb-related-item a {
    font-weight: 600;
    font-size: .95rem;
    display: block;
    margin-bottom: 4px;
}

.lb-related-item span {
    font-size: .78rem;
    color: var(--muted);
}

/* ---------------- 归档页 ---------------- */
.lb-archive-month {
    margin: 0 0 8px;
    font-size: 1rem;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.lb-archive-month em {
    font-style: normal;
    font-size: .8rem;
    color: var(--muted);
}

.lb-archive-list {
    margin: 0 0 20px;
    padding-left: 20px;
    font-size: .95rem;
}

.lb-archive-list li {
    margin: 4px 0;
}

.lb-archive-list time {
    color: var(--muted);
    font-size: .82rem;
    margin-right: 8px;
}

/* ---------------- 标签云 ---------------- */
.lb-tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.lb-tag-cloud a {
    display: inline-flex;
    align-items: baseline;
    gap: 5px;
    padding: 6px 13px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-soft);
    color: var(--text);
    font-weight: 500;
}

.lb-tag-cloud a:hover {
    background: var(--primary-soft);
    color: var(--primary-strong);
    border-color: var(--primary);
}

.lb-tag-cloud a .lb-tag-count {
    font-size: .74rem;
    color: var(--muted);
}

.lb-tag-cloud a.size-1 { font-size: .86rem; }
.lb-tag-cloud a.size-2 { font-size: .96rem; }
.lb-tag-cloud a.size-3 { font-size: 1.06rem; }
.lb-tag-cloud a.size-4 { font-size: 1.18rem; }
.lb-tag-cloud a.size-5 { font-size: 1.3rem; }

/* ---------------- 页脚的归档 / 标签 / RSS 入口 ---------------- */
.lb-footer-links {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 8px;
    font-size: .86rem;
}

/* ---------------- 离线页 ---------------- */
.lb-offline {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 8px;
}

/* ---------------- 移动端微调 ---------------- */
@media (max-width: 720px) {
    .lb-reader {
        right: 10px;
        bottom: 12px;
        gap: 5px;
    }

    .lb-reader-btn {
        min-width: 52px;
        height: 30px;
        padding: 0 11px;
        font-size: .74rem;
        border-radius: 15px;
    }

    .lb-related-list {
        grid-template-columns: 1fr;
    }
}