/* Forgemacs site theme: Tufte-style layout in bharathpalavalli.com's colours.
   Text: ET Book (MIT). Code: Atkinson Hyperlegible Mono (OFL). Licences in ../fonts/. */
@font-face{font-family:"ET Book";src:url(../fonts/etbook.woff) format("woff");font-display:swap}
@font-face{font-family:"ET Book";src:url(../fonts/etbook-i.woff) format("woff");font-style:italic;font-display:swap}
@font-face{font-family:"ET Book";src:url(../fonts/etbook-b.woff) format("woff");font-weight:600 700;font-display:swap}
@font-face{font-family:"Atkinson Hyperlegible Mono";src:url(../fonts/atkmono.woff2) format("woff2");font-weight:200 800;font-display:swap}

/* ---------- Colours ---------- */
/* Light: bharathpalavalli.com – red #a70f0f on grey #e8e8e8, black text */
:root{
  color-scheme:light;
  --bg:#e8e8e8; --text:#000; --muted:#4a4a4a; --accent:#a70f0f; --head:#a70f0f; --rule:#c4c4c4;
  --code-bg:#f4f4f4; --code-text:#1a1a1a; --mark:#a70f0f14;
  --k:#a70f0f; --str:#2d6a2d; --const:#1d4f91; --comment:#5c5c5c; --doc:#4b5a4f; --fn:#6e2f86;
  --var:#8a4b00; --type:#5b3f9e; --warn:#9a3c00; --rx:#6a5a00; --quote:#7a3b2e; --punct:#555; --str2:#245e6a;
}
/* Dark (charcoal): neutral near-black, the red lifted so it stays readable */
:root[data-theme=dark]{
  color-scheme:dark;
  --bg:#1b1b1b; --text:#e8e8e8; --muted:#a8a8a8; --accent:#f2726b; --head:#f2726b; --rule:#3a3a3a;
  --code-bg:#242424; --code-text:#e2e2e2; --mark:#f2726b1f;
  --k:#ff8a80; --str:#a8d892; --const:#93bcf5; --comment:#b0aaa4; --doc:#c4bdb3; --fn:#dcb0f5;
  --var:#f2c374; --type:#c9a8f5; --warn:#ffb36e; --rx:#e6cc66; --quote:#f3a594; --punct:#a9a29b; --str2:#8fd4dc;
}
/* Without a choice saved, follow the system (also works with scripts off) */
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]){
    color-scheme:dark;
    --bg:#1b1b1b; --text:#e8e8e8; --muted:#a8a8a8; --accent:#f2726b; --head:#f2726b; --rule:#3a3a3a;
    --code-bg:#242424; --code-text:#e2e2e2; --mark:#f2726b1f;
    --k:#ff8a80; --str:#a8d892; --const:#93bcf5; --comment:#b0aaa4; --doc:#c4bdb3; --fn:#dcb0f5;
    --var:#f2c374; --type:#c9a8f5; --warn:#ffb36e; --rx:#e6cc66; --quote:#f3a594; --punct:#a9a29b; --str2:#8fd4dc;
  }
}

/* ---------- Page: one text column and a margin for notes, centred together ---------- */
:root{--serif:"ET Book",Palatino,"Palatino Linotype",Georgia,serif;
  --mono:"Atkinson Hyperlegible Mono",ui-monospace,monospace;
  --text-w:40rem;--gap:2.5rem;--note-w:15rem}
*{box-sizing:border-box}
html{scroll-padding-top:1.5rem}
body{margin:0;background:var(--bg);color:var(--text);font:1.25rem/1.75 var(--serif);
  font-kerning:normal;font-variant-ligatures:common-ligatures;text-rendering:optimizeLegibility}
#content,#postamble{width:var(--text-w);max-width:calc(100vw - 2.4rem);
  margin-left:max(1.2rem,calc((100vw - var(--text-w) - var(--gap) - var(--note-w)) / 2))}
#content{padding:3rem 0 2rem}
a{color:var(--accent);text-decoration-thickness:.06em;text-underline-offset:.16em}
h1.title{font-size:2.9rem;line-height:1.15;color:var(--head);font-weight:400;margin:0 0 2.5rem}
h2,h3,h4,h5{line-height:1.3;font-weight:400}
h2{font-size:2.1rem;color:var(--head);margin:3.5rem 0 1rem}
h3{font-size:1.6rem;font-style:italic;margin:2.6rem 0 .6rem}
h4,h5{font-size:1.3rem;font-style:italic;margin:2rem 0 .4rem}
.section-number-2,.section-number-3,.section-number-4,.section-number-5{color:var(--muted);font-style:normal;
  font-variant-numeric:lining-nums tabular-nums;margin-right:.35em;font-size:.8em}
.outline-2+.outline-2::before{content:"";display:block;width:100px;margin:3.5rem auto 0;border-top:5px dotted var(--accent)}
.hlink{margin-left:.35em;font-size:.7em;opacity:0;text-decoration:none;font-style:normal}
h2:hover .hlink,h3:hover .hlink,h4:hover .hlink,h5:hover .hlink,.hlink:focus{opacity:.8}
p{margin:0 0 1.1rem}
ul,ol{padding-left:1.4em}
li{margin:.2rem 0}
blockquote{margin:1.4rem 0;padding-left:1.2rem;border-left:3px solid var(--accent);font-style:italic}
.todo{font:600 .7em/1 var(--mono);color:var(--bg);background:var(--accent);padding:.12em .35em;border-radius:3px;vertical-align:.15em}
.done{font:600 .7em/1 var(--mono);color:var(--muted);border:1px solid var(--rule);padding:.08em .35em;border-radius:3px}

/* ---------- Code ---------- */
code,kbd,pre,samp{font-family:var(--mono);font-size:.74em}
:not(pre)>code{background:var(--code-bg);color:var(--code-text);padding:.06em .3em;border-radius:3px;
  overflow-wrap:anywhere;font-size:.78em}
/* Code reaches into the margin, so it starts below any margin note above it */
.org-src-container,pre.example,.table-wrap{width:calc(var(--text-w) + var(--gap) + var(--note-w));
  max-width:calc(100vw - 2.4rem);clear:right}
.org-src-container{margin:1.5rem 0;border-radius:8px;background:var(--code-bg);overflow:hidden}
.src-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.45rem .9rem;
  font:600 .7rem/1 var(--mono);color:var(--muted);border-bottom:1px solid var(--rule);letter-spacing:.03em}
.src-copy{font:inherit;color:inherit;background:none;border:1px solid var(--rule);border-radius:5px;padding:.3rem .55rem;cursor:pointer}
.src-copy:hover,.src-copy:focus{color:var(--accent);border-color:var(--accent)}
pre{margin:0;padding:.9rem 1rem;overflow:auto;line-height:1.55;color:var(--code-text);background:var(--code-bg);tab-size:2}
pre.example{margin:1.4rem 0;border-radius:8px}
/* Syntax colours: Org writes one class per Emacs face (org-html-htmlize-output-type 'css) */
.org-keyword{color:var(--k)}
.org-string,.org-sh-quoted-exec{color:var(--str)}
.org-builtin{color:var(--const)}
.org-constant{color:var(--quote)}
.org-doc{color:var(--doc);font-style:italic}
.org-comment,.org-comment-delimiter{color:var(--comment);font-style:italic}
.org-function-name{color:var(--fn)}
.org-variable-name{color:var(--var)}
.org-type{color:var(--type)}
.org-warning,.org-negation-char{color:var(--warn)}
.org-regexp-grouping-construct,.org-regexp-grouping-backslash{color:var(--rx)}
.org-org-hide{color:var(--muted)}
.org-org-level-1{color:var(--k);font-weight:700}.org-org-level-2{color:var(--const)}
.org-org-level-3{color:var(--fn)}.org-org-level-4{color:var(--var)}
/* Markdown inside code blocks */
.org-markdown-markup,.org-markdown-list,.org-markdown-header-delimiter,.org-markdown-footnote-marker,
.org-sh-escaped-newline{color:var(--punct)}
.org-markdown-header-face-1{color:var(--const);font-weight:700}
.org-markdown-link{color:var(--k);text-decoration:underline}
.org-markdown-url,.org-markdown-plain-url{color:var(--str2)}
.org-markdown-code,.org-markdown-pre,.org-markdown-inline-code{background:var(--mark)}
.org-markdown-italic{font-style:italic}

/* ---------- Tables: booktabs – a rule above, one under the header, one below ---------- */
.table-wrap{overflow-x:auto;margin:1.6rem 0}
table{border-collapse:collapse;border:0;font-size:.9em;font-variant-numeric:lining-nums tabular-nums;
  border-top:2px solid var(--text);border-bottom:2px solid var(--text)}
thead th{border-bottom:1px solid var(--text);font-weight:600}
th,td{padding:.35rem 1.1rem .35rem 0;border:0;text-align:left;vertical-align:top}
th:last-child,td:last-child{padding-right:0}
tbody tr:first-child td{padding-top:.6rem}
tbody tr:last-child td{padding-bottom:.6rem}
caption{caption-side:bottom;font-style:italic;color:var(--muted);text-align:left;padding-top:.4rem}

/* ---------- Margin notes (made from the Org footnotes) ---------- */
sup{line-height:0}
.footref{font-variant-numeric:lining-nums}
.sidenote{float:right;clear:right;width:var(--note-w);margin-right:calc(-1 * (var(--note-w) + var(--gap)));
  margin-top:.25rem;margin-bottom:1rem;font-size:.95rem;line-height:1.45;color:var(--muted);overflow-wrap:anywhere}
.sidenote .sn-n{color:var(--accent);font-weight:600;margin-right:.3em;font-variant-numeric:lining-nums}
body.has-sidenotes #footnotes{display:none}
@media (max-width:72rem){
  .sidenote{float:none;display:block;width:auto;margin:.6rem 0 .8rem;padding-left:.9rem;border-left:2px solid var(--accent)}
}

/* ---------- Contents and search panel ---------- */
.toc{position:fixed;top:0;bottom:0;left:0;width:20rem;max-width:88vw;overflow:auto;z-index:30;
  background:var(--bg);border-right:1px solid var(--rule);padding:1.3rem 1rem 3rem;font-size:1rem;
  transform:translateX(-102%);transition:transform .25s ease;visibility:hidden}
body.open .toc{transform:none;box-shadow:0 0 50px #0004;visibility:visible}
.toc .toc-title{margin-bottom:.5rem}
.toc .toc-title a{color:var(--head);font-style:italic;font-size:1.25rem;text-decoration:none}
.toc input{width:100%;font:.8rem var(--mono);color:var(--text);background:var(--code-bg);border:1px solid var(--rule);
  border-radius:6px;padding:.5rem .6rem;margin:.3rem 0 .8rem}
.toc input:focus{outline:2px solid var(--accent);outline-offset:1px}
.toc ul{list-style:none;margin:0;padding-left:.85rem}
.toc #text-table-of-contents{padding-left:1rem}
.toc #text-table-of-contents>ul{padding-left:0}
.toc li{margin:0;position:relative}
.toc a{display:block;padding:.16rem .5rem;color:var(--text);text-decoration:none;line-height:1.35;
  border-left:2px solid transparent;border-radius:0 4px 4px 0}
.toc a:hover{color:var(--accent)}
.toc a.active{color:var(--accent);border-left-color:var(--accent);background:var(--mark)}
.toc li>ul{display:none}
.toc #text-table-of-contents>ul>li>ul,.toc li.open>ul,.toc li.shown>ul{display:block}
.toc .twisty{position:absolute;left:-1.05rem;top:.12rem;width:1rem;height:1.3rem;padding:0;border:0;background:none;
  color:var(--muted);cursor:pointer;transition:transform .15s}
.toc .twisty::before{content:"";position:absolute;left:.25rem;top:.45rem;width:.38rem;height:.38rem;
  border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(-45deg)}
.toc .twisty:hover{color:var(--accent)}
.toc li.open>.twisty,.toc li.shown>.twisty,.toc #text-table-of-contents>ul>li>.twisty{transform:rotate(90deg)}
.toc.searching #text-table-of-contents{display:none}
.toc .results{list-style:none;margin:0;padding:0}
.toc .results a{border-left:0;padding:.45rem .5rem;border-bottom:1px solid var(--rule);border-radius:0}
.toc .results a:hover,.toc .results a:focus{background:var(--mark)}
.toc .r-title{display:block;font-weight:600;font-size:.88rem;color:var(--accent)}
.toc .r-snip{display:block;font-size:.85rem;color:var(--muted);overflow-wrap:anywhere}
.toc .r-snip mark{background:var(--mark);color:var(--text);font-weight:600;border-radius:2px}
.toc .r-none{color:var(--muted);font-style:italic;padding:.5rem}
::highlight(search){background-color:#ffd54a;color:#000}
.toc h2{display:none}
.toc-btn,.mode-btn,.top-btn{font:600 .78rem/1 var(--mono);color:var(--text);background:var(--bg);border:1px solid var(--rule);
  border-radius:999px;padding:.55rem .85rem;cursor:pointer;position:fixed;z-index:25}
.toc-btn:hover,.mode-btn:hover,.top-btn:hover{color:var(--accent);border-color:var(--accent)}
.toc-btn{left:1rem;bottom:1rem}
.mode-btn{right:1rem;top:1rem}
/* Back to the top: shown once the page has been scrolled */
.top-btn{right:1rem;bottom:1rem;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s}
.top-btn.shown{opacity:1;visibility:visible}
/* Author, date and contact under the title (the same as the footer) */
.byline{color:var(--muted);font-size:1rem;margin:-1.8rem 0 2.5rem}
.byline .sep{margin:0 .5em}
.scrim{position:fixed;inset:0;background:#0005;z-index:29;display:none}
body.open .scrim{display:block}
/* Without scripts, the contents stay at the top of the page as Org wrote them */
#table-of-contents h2{font-size:1.4rem}

#postamble{color:var(--muted);font-size:.95rem;border-top:1px solid var(--rule);padding:1rem 0 4rem}
#postamble p{margin:.2rem 0}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.toc,.toc-btn,.mode-btn,.scrim,.src-copy{display:none}
  .sidenote{float:none;display:block;width:auto;margin:.4rem 0;padding-left:.8rem;border-left:2px solid #999}}