/* MDView reading typography ("Reading first", SRS 4.1) - also inlined into standalone HTML exports */
.md-body { --read-size: 17px; --read-lh: 1.75; --read-width: 72ch; font-family: var(--read-font, var(--font-read)); font-size: var(--read-size); line-height: var(--read-lh);
  color: var(--text); max-width: var(--read-width); margin: 0 auto; word-wrap: break-word; overflow-wrap: anywhere; line-break: auto; }
.md-body.f-sans { --read-font: var(--font-ui); }
.md-body.f-serif { --read-font: var(--font-read); }
.md-body.f-mono { --read-font: var(--font-mono); font-size: calc(var(--read-size) - 1px); }
.md-body.w-narrow { --read-width: 60ch; } .md-body.w-normal { --read-width: 72ch; } .md-body.w-wide { --read-width: 100ch; }
.md-body > :first-child { margin-top: 0; }
.md-body h1, .md-body h2, .md-body h3, .md-body h4, .md-body h5, .md-body h6 { font-family: var(--font-ui); line-height: 1.3; letter-spacing: -.015em; margin: 1.8em 0 .6em; scroll-margin-top: calc(var(--header-h, 60px) + 64px); font-weight: 700; }
.md-body h1 { font-size: 2.1em; letter-spacing: -.025em; margin-top: .4em; }
.md-body h2 { font-size: 1.55em; padding-bottom: .3em; border-bottom: 1px solid var(--line); }
.md-body h3 { font-size: 1.25em; } .md-body h4 { font-size: 1.08em; } .md-body h5, .md-body h6 { font-size: 1em; color: var(--text-2); }
.md-body p, .md-body ul, .md-body ol, .md-body blockquote, .md-body .table-scroll, .md-body .code-wrap, .md-body details, .md-body .mermaid-box { margin: 0 0 1.1em; }
.md-body a { color: var(--primary); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.md-body a[target="_blank"]::after { content: "↗"; font-size: .75em; margin-left: 2px; text-decoration: none; display: inline-block; }
.md-body strong { font-weight: 700; }
.md-body del { color: var(--muted); }
.md-body ul, .md-body ol { padding-left: 1.6em; }
.md-body li + li { margin-top: .25em; }
.md-body li > ul, .md-body li > ol { margin: .25em 0 0; }
.md-body .task-list-item { list-style: none; margin-left: -1.4em; }
.md-body .task-list-item input { margin: 0 .5em 0 0; vertical-align: middle; accent-color: var(--primary); width: 16px; height: 16px; }
.md-body blockquote { padding: .6em 1.1em; border-left: 4px solid var(--accent); background: var(--surface); border-radius: 0 10px 10px 0; color: var(--text-2); }
.md-body blockquote > :last-child { margin-bottom: 0; }
.md-body hr { border: 0; height: 1px; background: var(--line); margin: 2.2em 0; }
.md-body img { max-width: 100%; border-radius: 10px; }
.md-body code { font-family: var(--font-mono); font-size: .86em; background: var(--code-bg); padding: .15em .4em; border-radius: 6px; }
.md-body pre { margin: 0; overflow-x: auto; }
.md-body pre code { background: none; padding: 0; font-size: 13.5px; line-height: 1.65; display: block; }
.code-wrap { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--code-bg); font-family: var(--font-ui); }
.code-head { display: flex; align-items: center; gap: 8px; padding: 6px 8px 6px 14px; border-bottom: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.code-lang { font-family: var(--font-mono); text-transform: lowercase; }
.code-btn { display: inline-flex; align-items: center; gap: 5px; border: 0; background: transparent; color: var(--muted); font-size: 12px; padding: 4px 8px; border-radius: 6px; cursor: pointer; min-height: 28px; }
.code-btn:hover { background: var(--surface-2); color: var(--text); }
.code-body { display: flex; }
.code-lines { display: none; padding: 14px 10px 14px 14px; text-align: right; color: var(--muted); opacity: .6; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.65; white-space: pre; user-select: none; border-right: 1px solid var(--line); }
.show-lines .code-lines { display: block; }
.code-body pre { flex: 1; padding: 14px 16px; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
.md-body table { border-collapse: collapse; width: 100%; font-family: var(--font-ui); font-size: .9em; }
.md-body th, .md-body td { padding: 10px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.md-body th { background: var(--surface); font-weight: 600; }
.md-body tr:last-child td { border-bottom: 0; }
.md-body tbody tr:nth-child(even) td { background: color-mix(in srgb, var(--surface) 50%, transparent); }
.md-body .footnotes { font-size: .88em; color: var(--text-2); }
.md-body .footnotes-sep { margin-top: 3em; }
.md-body .footnote-ref a, .md-body .footnote-backref { text-decoration: none; }
.md-body eqn { display: inline; }
.md-body section > eqn, .md-body .math-block { display: block; text-align: center; overflow-x: auto; margin: 1em 0; }
.md-body .katex { font-size: 1.08em; }
.mermaid-box { padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--elev, #fff); overflow-x: auto; text-align: center; }
.mermaid-box pre.mermaid:not([data-processed]) { font-family: var(--font-mono); font-size: 13px; color: var(--muted); text-align: left; white-space: pre-wrap; }
.mermaid-error { border-left: 3px solid var(--danger); }
.front-matter { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); font-family: var(--font-ui); font-size: 14px; }
.front-matter summary { padding: 10px 14px; cursor: pointer; font-weight: 600; color: var(--text-2); display: flex; gap: 8px; align-items: center; }
.front-matter table { width: 100%; border-collapse: collapse; }
.front-matter th { width: 30%; color: var(--muted); font-weight: 500; }
.front-matter th, .front-matter td { padding: 8px 14px; border-top: 1px solid var(--line); text-align: left; }
/* highlight.js tokens (GitHub-like, light + dark through variables) */
.hljs { color: var(--text); }
.hljs-comment, .hljs-quote { color: #6a737d; font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-type, .hljs-meta .hljs-keyword, .hljs-doctag, .hljs-template-tag { color: #cf222e; }
.hljs-string, .hljs-regexp, .hljs-addition, .hljs-meta .hljs-string { color: #0a3069; }
.hljs-number, .hljs-literal, .hljs-variable, .hljs-template-variable, .hljs-attr, .hljs-attribute, .hljs-selector-attr, .hljs-selector-class, .hljs-selector-id { color: #0550ae; }
.hljs-title, .hljs-title.function_, .hljs-section { color: #8250df; }
.hljs-built_in, .hljs-symbol, .hljs-bullet, .hljs-name, .hljs-tag { color: #116329; }
.hljs-deletion { color: #82071e; background: #ffebe9; }
.hljs-emphasis { font-style: italic; } .hljs-strong { font-weight: 700; }
:root[data-theme="dark"] .hljs-keyword, :root[data-theme="dark"] .hljs-selector-tag, :root[data-theme="dark"] .hljs-type, :root[data-theme="dark"] .hljs-doctag { color: #ff7b72; }
:root[data-theme="dark"] .hljs-string, :root[data-theme="dark"] .hljs-regexp, :root[data-theme="dark"] .hljs-addition { color: #a5d6ff; }
:root[data-theme="dark"] .hljs-number, :root[data-theme="dark"] .hljs-literal, :root[data-theme="dark"] .hljs-variable, :root[data-theme="dark"] .hljs-attr, :root[data-theme="dark"] .hljs-attribute, :root[data-theme="dark"] .hljs-selector-class { color: #79c0ff; }
:root[data-theme="dark"] .hljs-title, :root[data-theme="dark"] .hljs-title.function_, :root[data-theme="dark"] .hljs-section { color: #d2a8ff; }
:root[data-theme="dark"] .hljs-built_in, :root[data-theme="dark"] .hljs-name, :root[data-theme="dark"] .hljs-tag { color: #7ee787; }
:root[data-theme="dark"] .hljs-comment { color: #8b949e; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .hljs-keyword, :root:not([data-theme="light"]) .hljs-selector-tag, :root:not([data-theme="light"]) .hljs-type { color: #ff7b72; }
  :root:not([data-theme="light"]) .hljs-string, :root:not([data-theme="light"]) .hljs-regexp { color: #a5d6ff; }
  :root:not([data-theme="light"]) .hljs-number, :root:not([data-theme="light"]) .hljs-literal, :root:not([data-theme="light"]) .hljs-variable, :root:not([data-theme="light"]) .hljs-attr, :root:not([data-theme="light"]) .hljs-attribute { color: #79c0ff; }
  :root:not([data-theme="light"]) .hljs-title, :root:not([data-theme="light"]) .hljs-section { color: #d2a8ff; }
  :root:not([data-theme="light"]) .hljs-built_in, :root:not([data-theme="light"]) .hljs-name, :root:not([data-theme="light"]) .hljs-tag { color: #7ee787; }
  :root:not([data-theme="light"]) .hljs-comment { color: #8b949e; }
}

/* ---------- reader page layout ---------- */
.reader-top { position: sticky; top: var(--header-h); z-index: 300; display: flex; align-items: center; gap: 6px; padding: 8px clamp(12px, 3vw, 32px); background: var(--glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); transition: transform .22s var(--ease), opacity .22s; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
.reader-top::-webkit-scrollbar { display: none; }
.reader-top.hide { transform: translateY(-110%); opacity: 0; pointer-events: none; }
.reader-top .doc-title { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 32ch; font-size: 14px; }
.reader-top .sep { width: 1px; height: 22px; background: var(--line); margin: 0 4px; flex: none; }
.read-progress { position: fixed; top: var(--header-h); left: 0; height: 3px; background: var(--grad); z-index: 400; width: 0; transition: width .1s linear; }
.reader-main { padding: 28px clamp(16px, 4vw, 56px) 120px; position: relative; }
.reader-main.split { display: grid; grid-template-columns: 1fr 1fr; gap: 0; padding: 0; }
.reader-main.split > .pane { height: calc(100vh - var(--header-h) - 53px); overflow-y: auto; padding: 24px 28px 80px; }
.reader-main.split > .src-pane { border-right: 1px solid var(--line); background: var(--surface); }
.src-view { font-family: var(--font-mono); font-size: 13.5px; line-height: 1.7; white-space: pre-wrap; word-break: break-word; margin: 0 auto; max-width: 100ch; color: var(--text-2); counter-reset: ln; }
.src-view .ln { display: block; padding-left: 4.2em; position: relative; }
.src-view .ln::before { counter-increment: ln; content: counter(ln); position: absolute; left: 0; width: 3.2em; text-align: right; color: var(--muted); opacity: .55; }
@media (max-width: 1023px) { .reader-main.split { grid-template-columns: 1fr; } .reader-main.split > .src-pane { display: none; } }
.continue-card { display: flex; align-items: center; gap: 12px; padding: 12px 14px; margin: 0 auto 22px; max-width: 72ch; border-radius: 14px; background: var(--grad-soft); border: 1px solid var(--primary-100); animation: pop .25s var(--ease); }
mark.find-hit { background: #FDE68A; color: inherit; border-radius: 3px; padding: 0 1px; }
mark.find-hit.cur { background: #F59E0B; box-shadow: 0 0 0 2px #F59E0B; }
:root[data-theme="dark"] mark.find-hit { background: rgba(251,191,36,.35); }
mark.note-hl { background: color-mix(in srgb, var(--nc, var(--accent)) 22%, transparent); border-bottom: 2px solid var(--nc, var(--accent)); color: inherit; cursor: pointer; border-radius: 2px; }
.note-marker { position: absolute; right: -36px; width: 26px; height: 26px; border-radius: 50%; background: var(--nc, var(--accent)); color: #fff; display: grid; place-items: center; font: 600 11px var(--font-ui); cursor: pointer; box-shadow: 0 2px 8px rgba(124,58,237,.35); border: 2px solid var(--bg); z-index: 5; }
.note-marker:hover { transform: scale(1.1); }
.md-body { position: relative; }
@media (max-width: 900px) { .note-marker { right: -8px; width: 22px; height: 22px; } }
.sel-pop { position: absolute; z-index: 700; display: flex; gap: 2px; padding: 4px; border-radius: 12px; background: var(--text); box-shadow: var(--shadow-pop); animation: pop .12s var(--ease); }
.sel-pop button { display: inline-flex; align-items: center; gap: 6px; border: 0; background: transparent; color: var(--bg); padding: 6px 10px; border-radius: 8px; cursor: pointer; font-size: 13px; font-weight: 500; min-height: 34px; }
.sel-pop button:hover { background: rgba(255,255,255,.12); }
.find-bar { display: flex; align-items: center; gap: 6px; }
.find-bar .input { min-height: 34px; width: 200px; padding: 5px 10px; }
.toc { list-style: none; margin: 0; padding: 0 0 0 2px; position: relative; font-size: 13.5px; }
.toc::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--line); border-radius: 2px; }
.toc .rail { position: absolute; left: 0; top: 0; width: 2px; background: var(--grad); border-radius: 2px; transition: height .15s; }
.toc a { display: block; padding: 5px 10px 5px 14px; color: var(--muted); text-decoration: none; border-radius: 0 8px 8px 0; line-height: 1.35; position: relative; }
.toc a:hover { color: var(--text); background: var(--surface-2); }
.toc a.on { color: var(--primary); font-weight: 600; }
.toc a.on::before { content: ""; position: absolute; left: -2px; top: 4px; bottom: 4px; width: 3px; border-radius: 3px; background: var(--primary); }
.toc .l2 { padding-left: 24px; } .toc .l3 { padding-left: 34px; } .toc .l4, .toc .l5, .toc .l6 { padding-left: 44px; font-size: 12.5px; }
.panel-tabs { display: flex; gap: 2px; padding: 10px 12px 0; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--surface); z-index: 2; }
.panel-tabs button { border: 0; background: none; padding: 10px 12px; font-weight: 500; font-size: 14px; color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; display: inline-flex; gap: 6px; align-items: center; min-height: 44px; }
.panel-tabs button.on { color: var(--primary); border-bottom-color: var(--primary); }
.panel-body { padding: 14px 14px 40px; }
.doc-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 16px; }
.doc-stats div { background: var(--elev); border: 1px solid var(--line); border-radius: 10px; padding: 8px; text-align: center; }
.doc-stats b { display: block; font-size: 16px; font-variant-numeric: tabular-nums; }
.doc-stats span { font-size: 11px; color: var(--muted); }
.note-item { padding: 12px; border-radius: 12px; background: var(--elev); border: 1px solid var(--line); border-left: 4px solid var(--nc, var(--accent)); margin-bottom: 10px; }
.note-item.on { box-shadow: 0 0 0 2px var(--primary-100); }
.note-item blockquote { margin: 0 0 8px; font-size: 13px; color: var(--text-2); font-family: var(--font-read); padding-left: 8px; border-left: 2px solid var(--line-2); }
.note-item .textarea { min-height: 70px; font-size: 14px; }
.note-item .meta { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); margin-top: 6px; flex-wrap: wrap; }
.note-item .rendered { font-size: 14px; }
.note-item .rendered p { margin: 0 0 6px; }
.save-state { font-size: 12px; color: var(--muted); display: inline-flex; gap: 4px; align-items: center; }
.save-state.saving { color: var(--warning); } .save-state.saved { color: var(--success); } .save-state.offline { color: var(--danger); }
.orphan { border-left-style: dashed; }
.prefs-pop { width: 300px; padding: 14px; }
.prefs-pop .field { margin-bottom: 12px; }
.prefs-pop input[type=range] { width: 100%; accent-color: var(--primary); }
body.focus-mode .hdr, body.focus-mode .side, body.focus-mode .right, body.focus-mode #banners { display: none !important; }
body.focus-mode .shell { grid-template-columns: 1fr !important; }
body.focus-mode .reader-top { top: 0; }
body.focus-mode .read-progress { top: 0; }
body.focus-mode { --header-h: 0px; }
.local-banner { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding: 12px 16px; margin: 0 auto 20px; max-width: 72ch; border-radius: 14px; border: 1px dashed var(--primary); background: var(--primary-50); font-family: var(--font-ui); font-size: 14px; }
@media print {
  .reader-top, .read-progress, .note-marker, .code-head, .continue-card, .local-banner, .sel-pop { display: none !important; }
  .md-body { max-width: none; font-size: 12pt; }
  .reader-main { padding: 0; }
  .md-body a[target="_blank"]::after { content: ""; }
  .code-wrap, .table-scroll, .mermaid-box { break-inside: avoid; }
}