:root {
    color-scheme: light;
    --paper: #fcfcfa;
    --ink: #242421;
    --muted: #6b6a64;
    --line: #deded8;
    --soft-line: #ecece7;
    --accent: #a43126;
    --code-bg: #f3f3f0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: "Noto Sans TC", sans-serif;
    line-height: 1.75;
    overflow-wrap: anywhere;
}
img, iframe, svg { max-width: 100%; }
a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { color: #76251e; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.container { width: min(100% - 3rem, 1120px); margin-inline: auto; }
.skip-link {
    position: absolute; z-index: 10; left: 1rem; top: -5rem;
    padding: 0.45rem 0.75rem; background: var(--ink); color: white;
}
.skip-link:focus { top: 1rem; }

.site-header { border-bottom: 1px solid var(--line); }
.site-head-row {
    min-height: 70px; display: flex; justify-content: space-between; align-items: center;
    gap: 1.5rem;
}
.wordmark { color: var(--ink); text-decoration: none; font-weight: 700; letter-spacing: -0.025em; }
.wordmark span { color: var(--muted); font-weight: 400; margin-left: 0.65rem; }
.site-nav { display: flex; flex-wrap: wrap; gap: 1.35rem; align-items: center; }
.site-nav a { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); text-decoration: none; font-size: 0.92rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent); }
.site-nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.45rem; }

h1, h2, h3, h4, h5, h6 { margin: 0; font-family: inherit; color: var(--ink); }
h1 { font-size: clamp(2.25rem, 5.5vw, 4.15rem); line-height: 1.25; letter-spacing: -0.045em; font-weight: 700; }
h2 { font-size: 1.25rem; line-height: 1.45; font-weight: 600; }
h3 { font-size: 1.04rem; line-height: 1.5; font-weight: 600; }
.site-kicker { margin: 0 0 0.8rem; color: var(--accent); font-size: 0.78rem; letter-spacing: 0.09em; }
.lead { max-width: 56ch; margin: 1rem 0 0; color: #55554f; font-size: 1.04rem; }
.home-main { padding-top: clamp(3rem, 8vw, 6.5rem); }
.home-intro { max-width: 720px; padding-bottom: 3.25rem; }
.title-break { display: none; }
.home-intro .lead { max-width: 58ch; }
.home-grid { display: grid; grid-template-columns: minmax(0, 1fr) 245px; gap: clamp(2.5rem, 7vw, 6.5rem); align-items: start; }
.home-content { min-width: 0; }
.content-section { padding: 1.9rem 0 2.25rem; border-top: 1px solid var(--line); min-width: 0; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: 1rem; }
.section-heading h2 { font-size: 1.2rem; }
.text-link { flex: 0 0 auto; color: var(--muted); text-decoration: none; font-size: 0.88rem; }
.text-link:hover { color: var(--accent); }
.note-index { border-top: 1px solid var(--soft-line); }
.note-row {
    display: grid; grid-template-columns: 8.8rem minmax(0, 1fr); align-items: baseline;
    gap: 0.8rem; min-width: 0; padding: 0.8rem 0; border-bottom: 1px solid var(--soft-line);
    color: var(--ink); text-decoration: none;
}
.note-row time, .repo-meta { color: var(--muted); font-size: 0.83rem; }
.note-row-title { font-weight: 500; }
.note-row:hover .note-row-title { color: var(--accent); }
.empty-note { margin: 1rem 0; color: var(--muted); }
.project-list { border-top: 1px solid var(--soft-line); }
.project-row { display: grid; grid-template-columns: 5.4rem minmax(0, 1fr); gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--soft-line); }
.project-row h3 a { color: var(--ink); text-decoration: none; }
.project-row h3 a:hover { color: var(--accent); }
.project-row h3 a span { color: var(--muted); font-size: 0.8em; }
.repo-rank { margin: 0.1rem 0 0; color: var(--accent); font-size: 0.75rem; }
.repo-desc { margin: 0.25rem 0 0; color: #55554f; font-size: 0.92rem; }
.project-row .repo-meta { margin: 0.45rem 0 0; }
.recent-projects .project-row { grid-template-columns: minmax(0, 1fr); }
.recent-update-item[hidden] { display: none; }
.notes-actions { margin: 1rem 0 0; }
.text-button { display: inline-flex; align-items: center; min-height: 44px; padding: 0; border: 0; border-bottom: 1px solid currentColor; background: none; color: var(--accent); font: inherit; cursor: pointer; }

.author-aside { padding-top: 1.5rem; }
.author-block { padding-bottom: 1.5rem; border-bottom: 1px solid var(--line); }
.site-avatar-link { display: inline-flex; width: 64px; height: 64px; margin-bottom: 0.9rem; border-radius: 50%; overflow: hidden; }
.site-avatar { display: block; width: 100%; height: 100%; object-fit: cover; }
.author-block h2 { font-size: 1.05rem; }
.aside-handle { margin: 0.1rem 0 0.7rem; color: var(--muted); font-size: 0.84rem; overflow-wrap: anywhere; }
.aside-copy { margin: 0; color: #55554f; font-size: 0.9rem; }
.aside-section { padding: 1.25rem 0; border-bottom: 1px solid var(--line); }
.aside-section h2 { margin-bottom: 0.6rem; font-size: 0.9rem; }
.aside-section p { margin: 0; color: #55554f; font-size: 0.88rem; }
.plain-list { margin: 0; padding-left: 1.15rem; color: #55554f; font-size: 0.87rem; }
.plain-list li + li { margin-top: 0.27rem; }
.link-list a { text-decoration: none; }
.link-list a:hover { text-decoration: underline; }

.site-footer { margin-top: 4rem; padding-top: 1.2rem; padding-bottom: 2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.82rem; }
.site-footer p { margin: 0.3rem 0 0; }
.top-disclaimer, .view-counter { font-size: 0.78rem; }

.interior-main { padding-top: clamp(2.5rem, 7vw, 5rem); }
.page-intro, .article-heading { max-width: 760px; padding-bottom: 2.7rem; }
.page-intro h1, .article-heading h1 { font-size: clamp(2rem, 4.8vw, 3.3rem); }
.page-intro .lead, .article-heading .lead { font-size: 0.98rem; }
.notes-index-section { max-width: 860px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-bottom: 1.8rem; color: var(--muted); font-size: 0.83rem; }
.breadcrumbs a { color: inherit; text-decoration: none; }
.breadcrumbs a:hover { color: var(--accent); }
.subsection-title { margin: 1.7rem 0 0.75rem; font-size: 0.96rem; }
.folder-index { margin-bottom: 1.6rem; }
.folder-index .note-row { grid-template-columns: minmax(0, 1fr) 8rem; }
.about-content { max-width: 760px; }
.about-content .content-section p { max-width: 70ch; margin: 0.5rem 0 0; color: #4f4f49; }
.about-content .plain-list { line-height: 1.9; }

.article-main { max-width: 1200px; }
.article-heading { max-width: 850px; padding-bottom: 2rem; }
.note-page-layout { display: grid; grid-template-columns: 215px minmax(0, 1fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.note-side-toc { min-width: 0; }
.note-side-toc-inner { position: sticky; top: 1.5rem; max-height: calc(100vh - 3rem); overflow: auto; border-left: 1px solid var(--line); padding: 0.1rem 0 0.1rem 0.85rem; color: var(--muted); font-size: 0.82rem; line-height: 1.5; }
.note-side-toc-inner[hidden] { display: none; }
.note-side-toc .toc ul, .note-side-toc .toc ol { list-style: none; margin: 0.35rem 0; padding-left: 0.8rem; }
.note-side-toc .toc > ul, .note-side-toc .toc > ol { margin-top: 0; padding-left: 0; }
.note-side-toc .toc li + li { margin-top: 0.22rem; }
.note-side-toc .toc ul:empty { display: none; }
.note-side-toc-level-4, .note-side-toc-level-5 { display: none; }
.note-side-toc-level-4.is-visible-deep, .note-side-toc-level-5.is-visible-deep { display: list-item; }
.note-side-toc .toc a { display: block; color: var(--muted); text-decoration: none; }
.note-side-toc .toc a:hover, .note-side-toc .toc a.is-active { color: var(--accent); }
.note-view-section { min-width: 0; }
.note-frame-layout { max-width: 960px; }
.note-frame { display: block; width: 100%; min-height: 78vh; border: 1px solid var(--line); background: white; }
.markdown-content { min-width: 0; max-width: 760px; margin-inline: auto; color: var(--ink); line-height: 1.85; }
.markdown-content h1, .markdown-content h2, .markdown-content h3, .markdown-content h4, .markdown-content h5, .markdown-content h6 { margin: 2rem 0 0.65rem; line-height: 1.4; }
.markdown-content h1 { font-size: 2rem; }
.markdown-content h2 { font-size: 1.55rem; }
.markdown-content h3 { font-size: 1.27rem; }
.markdown-content h4 { font-size: 1.1rem; }
.markdown-content h5 { font-size: 1rem; }
.markdown-content h6 { font-size: 0.94rem; color: var(--muted); }
.markdown-content p, .markdown-content ul, .markdown-content ol, .markdown-content blockquote { margin: 0.85rem 0; }
.markdown-content ul, .markdown-content ol { padding-left: 1.65rem; }
.markdown-content li { margin: 0.32rem 0; padding-left: 0.15rem; }
.markdown-content pre { max-width: 100%; overflow-x: auto; background: var(--code-bg); border: 1px solid var(--soft-line); padding: 0.9rem; }
.markdown-content .highlight, .markdown-content details { max-width: 100%; min-width: 0; }
.markdown-content .highlight pre { margin: 0; }
.markdown-content .highlighttable { width: auto; table-layout: auto; border-collapse: collapse; margin: 0; }
.markdown-content .highlighttable td { border: 0; padding: 0; overflow-wrap: normal; }
.markdown-content .highlighttable .linenos { user-select: none; }
.markdown-content .highlighttable .linenodiv pre { border-right: 1px solid var(--line); color: var(--muted); min-width: 2.4rem; padding-right: 0.65rem; text-align: right; }
.markdown-content .highlighttable .code { width: 100%; }
.markdown-content .highlighttable .code pre { border-left: 0; }
.markdown-content code { font-family: Consolas, "Courier New", monospace; font-size: 0.92em; }
.markdown-content :not(pre) > code { background: var(--code-bg); padding: 0.1rem 0.32rem; }
.markdown-content .arithmatex { max-width: 100%; overflow-wrap: normal; }
.markdown-content div.arithmatex { overflow-x: auto; overflow-y: hidden; padding: 0.1rem 0; }
.markdown-content .mermaid { max-width: 100%; min-height: 3rem; margin: 1.25rem 0; padding: 0.8rem; overflow-x: auto; border: 1px solid var(--line); background: white; text-align: center; }
.markdown-content .mermaid:not(.mermaid-rendered) { white-space: pre-wrap; overflow-wrap: anywhere; font-family: Consolas, "Courier New", monospace; font-size: 0.88rem; text-align: left; }
.markdown-content .mermaid svg { display: block; max-width: 100%; height: auto; margin: 0 auto; }
.markdown-content .mermaid-error-message { margin: 0 0 0.65rem; color: #9b2c2c; font-family: inherit; font-weight: 700; }
.markdown-content .mermaid-render-error pre { margin: 0; white-space: pre-wrap; }
.markdown-content mjx-container { max-width: 100%; }
.markdown-content mjx-container[display="true"] { overflow-x: auto; overflow-y: hidden; padding: 0.15rem 0; }
.markdown-content blockquote { border-left: 2px solid var(--accent); padding-left: 1rem; color: #55554f; }
.markdown-content hr { border: 0; border-top: 1px solid var(--line); margin: 1.7rem 0; }
.markdown-content table { width: 100%; table-layout: fixed; border-collapse: collapse; margin: 1rem 0; }
.markdown-content th, .markdown-content td { border: 1px solid var(--line); padding: 0.5rem 0.6rem; text-align: left; overflow-wrap: anywhere; }
.markdown-content img { max-width: 100%; height: auto; }
.markdown-content details { border: 1px solid var(--line); padding: 0.6rem 0.8rem; margin: 0.9rem 0; }
.markdown-content summary { cursor: pointer; font-weight: 600; }
.markdown-content .toc, .markdown-content .toc ul, .markdown-content .toc ol { font-size: 0.92rem; line-height: 1.55; }
.markdown-content .toc ul, .markdown-content .toc ol { margin: 0.35rem 0; padding-left: 1.25rem; }
.markdown-content .toc li + li { margin-top: 0.15rem; }
.markdown-content .toc a, .markdown-content .toc a:hover { text-decoration: none; }

@media (max-width: 800px) {
    .home-grid { grid-template-columns: minmax(0, 1fr) 220px; gap: 2rem; }
    .note-page-layout { grid-template-columns: 175px minmax(0, 1fr); gap: 1.7rem; }
}
@media (max-width: 680px) {
    .container { width: min(100% - 2rem, 1120px); }
    .site-head-row { min-height: auto; padding-block: 1rem; align-items: flex-start; flex-direction: column; gap: 0.75rem; }
    .site-nav { gap: 1.15rem; }
    .home-main { padding-top: 3rem; }
    .home-intro { padding-bottom: 2rem; }
    .home-grid { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
    .author-aside { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 1.5rem; padding-top: 0.5rem; }
    .author-block { grid-column: 1 / -1; }
    .aside-section { min-width: 0; }
    .note-page-layout { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
    .note-side-toc { order: 0; }
    .note-side-toc-inner { position: static; max-height: 14rem; }
    .markdown-content { max-width: none; }
    .markdown-content table { display: block; overflow-x: auto; }
}
@media (max-width: 420px) {
    .container { width: min(100% - 1.5rem, 1120px); }
    .wordmark span { margin-left: 0.35rem; }
    .site-nav { width: 100%; justify-content: space-between; gap: 0.5rem; }
    .site-nav a { font-size: 0.84rem; }
    h1 { font-size: 2.25rem; }
    .title-break { display: initial; }
    .note-row { grid-template-columns: 6.3rem minmax(0, 1fr); gap: 0.45rem; }
    .note-row time { font-size: 0.72rem; }
    .folder-index .note-row { grid-template-columns: minmax(0, 1fr); gap: 0.35rem; }
    .folder-index .note-row-title { grid-column: 1; grid-row: 1; }
    .folder-index .note-row time { grid-column: 1; grid-row: 2; font-size: 0.68rem; }
    .project-row { grid-template-columns: 4.3rem minmax(0, 1fr); gap: 0.65rem; }
    .author-aside { column-gap: 1rem; }
}