/* =========================
   Theme variables
   ========================= */
:root{
    /* Layout */
    
    --gutter:  2rem;
    --margin:  420px;
    --body-pad: 1rem;
    --content: clamp(
	var(--content-min),
	calc(100vi - 2*var(--body-pad) - 2*(var(--margin) + var(--gutter))),
	var(--content-max)
    );
    --content-min: 60ch;
    --content-max: 880px;
    /* Fullwidth media tuning */
    --bleed: 48px; 
    --fullwidth-cap: 860px;

    /* Colors */
    --bg: #faf9f6;
    --fg: #000000;
    --link: #1a0dab;
    --heading: #004c99;
    --code-bg: #f0f0f0;
    --active-toc: #cacaca;

    /* Notes */
    --note-color: #555;
    --note-bg: transparent;
}

/* =========================
   Base
   ========================= */
html, body{
    background-color: var(--bg);
    color: var(--fg);
    font-size: 16px;
    transition: background-color .3s, color .3s;
    margin: 0;
}

h1, h2, h3{ color: var(--heading); }

a {
  color: var(--link);
  text-decoration: none; /* removes underline by default */
}

a:hover {
  text-decoration: underline; /* only show on hover */
}

/* =========================
   Header / Banner
   ========================= */
.banner-header{
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    padding: .5rem 1rem;
    border-radius: 6px;
}
.banner-logo{
    height: 80px; width: auto;
    margin-right: 1.5rem; border-radius: 50%;
}
nav{
    display: flex; gap: 1rem;
    font-weight: 600; font-size: 1.1rem;
}
#updated{
    font-size: .8rem; color: var(--fg);
    margin: .5rem 0 1rem; font-style: italic;
}
/* Mobile banner */
@media (max-width: 600px){
    .banner-header{ flex-direction: column; align-items: center; text-align: center; }
    .banner-logo{ margin: 0 0 .5rem 0; }
    nav{ flex-wrap: wrap; justify-content: center; gap: .5rem; font-size: 1rem; }
}
/* Make the preamble align with the content column + right rail */
#preamble.status{
    max-width: var(--content);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--body-pad);
    padding-right: var(--body-pad);
    box-sizing: content-box;
}

#preamble .banner-header,
#preamble #updated{
    max-width: 100%;
}

@media (max-width: 1250px){
    #preamble.status{
      padding-right: var(--body-pad);
  }
}

/* =========================
   Footer
   ========================= */
footer{
    color: var(--fg);
    padding: 1rem; margin-top: 2rem;
    border-radius: 6px; text-align: center;
    font-size: .9rem; font-style: italic;
}

/* =========================
   Content column + reserved right margin
   ========================= */
#content.content{
  max-width: var(--content);
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: var(--body-pad);
  padding-right: var(--body-pad);
  box-sizing: content-box;
  position: relative; /* fine to keep */
}


/* Figures & normal images obey text column */
#content .figure,
#content img:not(.fullwidth){
    max-width: 100%;
    height: auto;
}

/* =========================
   Sidenotes (Tufte-like)
   ========================= */
/* HTML pattern:
   label.margin-toggle.sidenote-number + input.margin-toggle + span.sidenote
*/
/* Sidenotes: float-right inside #content, then push them into the right gutter+edge */
.sidenote,
.marginnote{
    float: right;
    width: var(--margin);
    //margin-right: calc(-1 * ( (95vw - var(--content)) / 2 ));
    margin-right: calc(-1 * ((100vi - var(--content)) / 2));
    padding-right: var(--gutter);
    overflow-wrap: break-word;    /* preferred */
    word-wrap: break-word;        /* legacy support */
    word-break: break-word;       /* safety for stubborn cases */
    margin-top: .3rem;
    margin-bottom: .6rem;
    font-size: .95rem;
    line-height: 1.35;
    color: var(--note-color);
    background: var(--note-bg);
    box-sizing: border-box;
}

/* Optional: show the same footnote number in the margin */
.footnote-sidenote::before{
  content: attr(data-fn) " ";
  font-size: 0.85em;
  vertical-align: super;
  margin-right: 0.2rem;
  opacity: 0.85;
}
/* Sidenote numbering */
body{ counter-reset: sidenote-counter; }
.sidenote-number:after{
    counter-increment: sidenote-counter;
    content: counter(sidenote-counter);
    font-size: .85em;
    vertical-align: super;
    margin-left: .15rem;
}

/* Hide checkbox toggles (kept for mobile patterns if added later) */
.margin-toggle{
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

/* Safety: only big blocks should clear floats to avoid gaps */
#content .figure,
#content .org-src-container,
#content img.fullwidth{
    //clear: both;
}

/* =========================
   Fullwidth media (centered, modest bleed, no collision)
   ========================= */
.fullwidth{
    display: block;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    height: auto;
    margin: 1.25rem 0 1.75rem;
    width: 100%;
    max-width: min(
	calc(var(--content) + var(--bleed) * 2),     /* centered bleed */
	var(--fullwidth-cap),                        /* absolute cap */
	calc(100vw - 2 * var(--body-pad))            /* never cause horizontal scroll */
    );
}
.figure .fullwidth{ width: inherit; }           /* if img sits inside a figure */
.figure figcaption{
    text-align: center; font-size: .95rem; color: #666; margin-top: .4rem;
}

@media (max-width: 1250px){
  #content.content{
    padding-right: var(--body-pad);
  }
  .sidenote,
  .marginnote{
    float: none;
    clear: both;
    width: auto;
    display: block;          /* ⬅ make them start on a new line */
    margin: 0.5rem 0 0.75rem; /* spacing above/below */
    padding-left: 0.75rem;
    border-left: 3px solid rgba(0,0,0,.08);
    margin-right: 0;
  }
  .fullwidth{
    max-width: calc(100vw - 2 * var(--body-pad));
  }
}


/* Ultra-wide comfort tweaks */
/* @media (min-width: 1600px){ */
/*     :root{ --content: 720px; --margin: 360px; } */
/* } */

/* =========================
   Code highlighting (Org-mode classes)
   ========================= */
.org-comment        { color: #b22222; }      /* comments */
.org-string         { color: #8b2252; }      /* string literals */
.org-keyword        { color: #a020f0; }      /* keywords */
.org-builtin        { color: #483d8b; }      /* builtins */
.org-constant       { color: #008b8b; }      /* constants / numbers */
.org-function-name  { color: #0000ff; }      /* function names */
.org-variable-name  { color: sienna; }       /* variables */
.org-type           { color: #228b22; }      /* types/classes */
.org-preprocessor   { color: #483d8b; }      /* #define, import, etc. */
.org-doc            { color: #8b2252; }      /* docstrings */
.org-warning        { color: #ff8c00; font-weight: 700; } /* warnings */

/* Inline code */
:not(pre) > code{
    padding: 2px 5px; margin: 0 1px;
    border: 1px solid #ddd; border-radius: 3px;
    background-clip: padding-box;
    color: #333; font-size: 80%;
}
pre {
    background-color: var(--bg);
}
/* Code blocks */
.org-src-container{
    border: 1px solid #ccc;
    box-shadow: 3px 3px 3px #eee;
    font-family: Lucida Console, monospace;
    font-size: 80%;
    margin: 1em auto;
    padding: .1em .5em;
    position: relative;
}
.org-src-container > pre{ overflow: auto; }

/* Language badges (optional) */
.org-src-container > pre:before{
    display: block; position: absolute; top: 0; right: 0;
    background-color: #b3b3b3; color: #fff;
    padding: 0 .5em; border-bottom-left-radius: 8px; border: 0;
    font-size: 80%;
}
.org-src-container > pre.src-bash:before        { content: "bash"; }
.org-src-container > pre.src-sh:before          { content: "sh"; }
.org-src-container > pre.src-shell:before       { content: "shell"; }
.org-src-container > pre.src-python:before      { content: "Python"; }
.org-src-container > pre.src-emacs-lisp:before  { content: "Emacs Lisp"; }
.org-src-container > pre.src-js:before,
.org-src-container > pre.src-javascript:before  { content: "Javascript"; }
.org-src-container > pre.src-typescript:before  { content: "Typescript"; }
.org-src-container > pre.src-html:before        { content: "HTML"; }
.org-src-container > pre.src-css:before         { content: "CSS"; }
.org-src-container > pre.src-c:before           { content: "C"; }
.org-src-container > pre.src-cpp:before         { content: "C++"; }
.org-src-container > pre.src-java:before        { content: "Java"; }
.org-src-container > pre.src-rust:before        { content: "Rust"; }
.org-src-container > pre.src-R:before           { content: "R"; }

/* Org copy button on blocks */
.copy-btn{
    position: absolute; top: .4em; right: .4em;
    background-color: var(--code-bg); color: var(--heading);
    border: 1px solid var(--heading); border-radius: 4px;
    padding: .2em .6em; font-size: .8rem; cursor: pointer; z-index: 10;
    transition: background-color .3s;
}
.copy-btn:hover{ background-color: var(--heading); color: var(--code-bg); }

/* Org’s default pre label removal if duplicated elsewhere */
pre.src::before{ content: none !important; }
pre.src{
    padding: 1.5em 1em 1em;
    font-family: "Fira Mono","Courier New",monospace;
    font-size: .9rem; line-height: 1.4;
    overflow-x: auto; white-space: pre-wrap;
}

/* =========================
   Lists with post meta chips
   ========================= */
.post-date{ color: pink; font-size: .9em; margin-left: 8px; }

/* Post tag chip no longer needs a clearfix */
.post-tag{
    float: right;
    display: inline-block;
    background-color: #f0f0f0;
    color: #444;
    border-radius: 5px;
    padding: 2px 6px;
    margin-left: 6px;
    font-size: 0.8em;
}

.filetags {
  margin-top: .5rem;
  display: flex;
  flex-wrap: wrap;
  gap: .3rem .4rem;
  font-size: .9rem;
  color: #666;
}
.filetags .tag {
  display: inline-block;
  padding: .1rem .45rem;
  border-radius: .5rem;
  background: #f0f0f0;
  line-height: 1.6;
}


/* Shared base styles for all lists */
ul, ol {
  margin: 1rem 0 1.5rem 1.5rem; /* space above/below and indent */
  padding: 0;
  line-height: 1.5;
}

/* Unordered lists: custom bullet */
ul {
  list-style: none; /* remove default bullet */
}
ul li {
  position: relative;
  padding-left: 1.2em; /* space for custom bullet */
}
ul li::before {
  content: "•"; /* bullet character */
  position: absolute;
  left: 0;
  top: 0;
  color: var(--heading); /* matches your headings color */
  font-weight: bold;
}

/* Ordered lists: styled numbers */
ol {
  counter-reset: list-counter;
  list-style: none; /* remove default numbering */
}
ol li {
  counter-increment: list-counter;
  position: relative;
  padding-left: 1.8em; /* space for custom number */
}
ol li::before {
  content: counter(list-counter) ".";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--heading);
  font-weight: bold;
}

/* List items: keep your float containment and spacing */
li {
  margin-bottom: 8px;
  display: flow-root; /* contains floats like .post-tag */
}

/* Remove the old clearfix ::after */
li::after {
  content: none;
}

/* Nested lists: smaller bullet/number and reduced spacing */
li ul,
li ol {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}
li ul li::before {
  content: "–"; /* en dash for nested bullets */
  font-weight: normal;
  color: var(--note-color);
}
li ol li::before {
  font-weight: normal;
  color: var(--note-color);
}
/* Epigraph container: center and limit width */
.epigraph {
  margin: 2rem auto;
  max-width: 80%; /* narrower than full text width */
  font-style: italic;
}

/* Main blockquote style */
.epigraph blockquote {
  margin: 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--heading);
  background-color: rgba(0, 0, 0, 0.02); /* subtle background */
  color: var(--fg);
  line-height: 1.6;
}

/* Footer inside blockquote: author/source */
.epigraph blockquote footer {
  margin-top: 0.75rem;
  font-style: normal; /* turn off italic for attribution */
  font-size: 0.9em;
  color: var(--note-color);
  text-align: right;
}

/* Cite: make source title distinct */
.epigraph blockquote cite {
  font-style: italic;
  font-weight: 500;
  color: var(--link);
}

/* Optional: remove automatic quotes from <blockquote> in some browsers */
.epigraph blockquote::before,
.epigraph blockquote::after {
  content: none;
}
/* =========================================
   Dark mode — manual (data-theme) wins
   ========================================= */
:root {
  /* optional: shared tokens for borders/chips */
  --border: #d7d7d7;
  --chip-bg: #f0f0f0;
  --chip-fg: #444;
  --muted: #666;
}

:root[data-theme="dark"]{
  --bg: #0f1115;
  --fg: #e6e6e6;
  --link: #8ab4ff;
  --heading: #9ecbff;
  --code-bg: #1a1d24;

  --note-color: #c2c7cf;
  --note-bg: transparent;

  --border: #2a2f3a;
  --chip-bg: #1f2330;
  --chip-fg: #cfd3da;
  --muted: #a9b0bb;
    --active-toc: #313131;

}

/* Auto scheme if no manual override is set */
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg: #0f1115;
    --fg: #e6e6e6;
    --link: #8ab4ff;
    --heading: #9ecbff;
    --code-bg: #1a1d24;

    --note-color: #c2c7cf;
    --note-bg: transparent;

    --border: #2a2f3a;
    --chip-bg: #1f2330;
    --chip-fg: #cfd3da;
    --muted: #a9b0bb;
  }
}

/* Tweak components that used fixed light colors */
.figure figcaption{ color: var(--muted); }
.post-tag{
  background-color: var(--chip-bg);
  color: var(--chip-fg);
}
.org-src-container{
  border: 1px solid var(--border);
  box-shadow: 3px 3px 3px rgba(0,0,0,.15);
}
:not(pre) > code{
  border: 1px solid var(--border);
  background-color: var(--code-bg);
  color: var(--fg);
}
.epigraph blockquote{
  border-left-color: var(--heading);
  background-color: color-mix(in oklab, var(--bg) 94%, var(--fg) 6%);
  color: var(--fg);
}
.epigraph blockquote footer{ color: var(--muted); }

/* Mobile sidenote rule uses a light border; make it theme-aware */
@media (max-width: 1250px){
  .sidenote, .marginnote{
    border-left: 3px solid color-mix(in oklab, var(--fg) 12%, transparent);
  }
}

/* Theme toggle button positioning + transparent background */
.theme-toggle {
  position: fixed;
  top: 0.75rem;
  right: 1rem;
  z-index: 1000;
  border: 1px solid var(--border, #ccc);
  background: transparent;
  color: var(--fg);
  padding: .35rem .7rem;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}
.theme-toggle:hover {
  background-color: rgba(0,0,0,0.05); /* subtle hover tint */
  color: var(--heading);
  border-color: var(--heading);
}

/* Mobile: place next to nav links */
@media (max-width: 600px) {
  .theme-toggle {
    position: static;
    order: 2; /* after nav links in flex layout */
    margin-left: .5rem;
    padding: .3rem .6rem;
    background: transparent;
  }

  .banner-header {
    flex-wrap: wrap;
    justify-content: center;
  }
  .banner-header nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
  }
}
/* Margin/sidenote images */
.sidenote .mn-fig,
.marginnote .mn-fig{
  margin: 0;
}
.sidenote .mn-img,
.marginnote .mn-img{
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border, #d7d7d7);
  border-radius: 6px;
  background: var(--bg);
}
.sidenote .mn-fig figcaption,
.marginnote .mn-fig figcaption{
  margin-top: .35rem;
  font-size: .85rem;
  color: var(--muted, #666);
  line-height: 1.35;
}

/* Mobile: these already stack under content via your media query; nothing special needed,
   but we can soften the border a touch to match the mobile sidenote rule */
@media (max-width: 1250px){
  .sidenote .mn-img,
  .marginnote .mn-img{
    border-color: color-mix(in oklab, var(--fg) 12%, transparent);
  }
}
.sidenote img {
  margin-top: 0.35rem;
  display: block;
}
/* .sidenote.footnote-sidenote img { */
/*   margin-top: 0.35rem; */
/*   display: block; */
/* } */


/* =========================
   Left sticky Table of Contents (desktop)
   ========================= */
#table-of-contents{
  /* push into the left gutter, mirroring .sidenote on the right */
  float: left;
  width: var(--margin);
  //margin-left: calc(-1 * ( (95vw - var(--content)) / 2 ));
  margin-left: calc(-1 * ((100vi - var(--content)) / 2));
  padding-left: var(--gutter);
  box-sizing: border-box;

  /* sticky behavior */
  position: sticky;
  top: 5.5rem;                  /* clear your banner/header */
  max-height: calc(100vh - 6rem);
  overflow: auto;

  /* look & feel */
  font-size: .95rem;
  border-right: 1px solid var(--border, #d7d7d7);
  padding-top: .25rem;
}

#table-of-contents > h2{
  margin: 0 0 .5rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: .02em;
  color: var(--muted, #666);
}

#text-table-of-contents ul{
  list-style: none;
  margin: 0;
  padding-left: 0;
}
#text-table-of-contents li{
  margin: .25rem 0;
}
#text-table-of-contents a{
  text-decoration: none;      /* no underline by default */
}
#text-table-of-contents a:hover{
  text-decoration: underline;
}

/* Indent nested ToC levels a bit */
#text-table-of-contents ul ul { margin-left: .75rem; opacity: .9; }

/* Headings offset so anchors don’t hide under the sticky header */
h2[id], h3[id], h4[id] { scroll-margin-top: 6.5rem; }

/* =========================
   Mobile / narrow view
   ========================= */
@media (max-width: 1250px){
  #table-of-contents{
    float: none;
    position: static;          /* no sticky on small screens */
    width: auto;
    margin: 0 0 1rem;
    padding: .5rem .75rem;
    border-right: 0;
    border-left: 3px solid color-mix(in oklab, var(--fg) 12%, transparent);
    background: color-mix(in oklab, var(--bg) 96%, var(--fg) 4%);
    border-radius: 4px;
  }
}
#text-table-of-contents a.is-active{
  // font-weight: 700;
  text-decoration: underline;
    background-color: var(--active-toc);
    //border: 1px solid var(--border, #ccc);
 
}