the-sourdough-framework/book/style.css

/* 
Color scheme 
#bab5a9;
#d5e3c6 

 */

/* ************** */
/* *** Fonts  *** */
/* ************** */

/* Font size tricks from https://www.madebymike.com.au/writing/precise-control-responsive-typography/ 
 * The font size will be adjusted to the screen size.
 * */
:root{
  font-size: 16px;
}

/* the min width is calculated as:
 * font-size / ( number of viewport units / 100 )
 * it means 16 / (1.5/100)
 */
@media (min-width: 1200px){
  :root {
    font-size: 1.5vw;
  }
}

/* Maximal font size should be 24px, so stop font scalling at some point (24 / (1.5/100)) */

@media (min-width: 1500px){
  :root {
    font-size: 20px;
  }
}

/* ************** */
/* *** Layout *** */
/* ************** */

body{
  /* max-width:52rem; */
  margin:0;
  padding:0;
  /* display:grid; */
  /* grid-auto-rows: auto; */
}

@media screen and (min-width: 57rem) {
  body{
    display:grid;
    grid-template-columns: 15rem 1fr;
  }
  main.main-content, main.titlepage, div.footnotes{max-width:40rem;grid-column: 2}
  main.titlepage {grid-row: 1;}
  nav.TOC{
    grid-row:1;
    grid-column: 1;
    min-height:100vh;
  }
}


/* ****************** */
/* *** Formatting *** */
/* ****************** */

main.main-content,main.titlepage,div.footnotes{
  padding:1rem;
}

p.indent, p.noindent{text-indent:0}
/* code{font-size:1.4rem;} */
/* figure pre.listings{font-size: 1.4rem;} */
figure.texsource, figure.shellcommand, figure.htmlsource, figure.luasource, figure.textsource{
  margin:0.5rem 0; 
  padding-left:0.5rem; 
  overflow:auto;
}
figure pre.listings{font-size: 1em;}

.chapterToc, .sectionToc, .subsectionToc{margin:0;padding:0;}
nav.TOC{
  padding:0.5rem;
  font-size:0; /* trick to remove vertical space above TOC entries */
}

 .chapterToc ~ .likesectionToc, .chapterToc ~ .sectionToc, .likechapterToc ~ .likesectionToc, .likechapterToc ~ .sectionToc {padding-left:2em;margin-left:0}
 .chapterToc ~ .likesectionToc ~ .likesubsectionToc, .chapterToc ~ .likesectionToc ~ .subsectionToc, .chapterToc ~ .sectionToc ~ .likesubsectionToc, .chapterToc ~ .sectionToc ~ .subsectionToc, .likechapterToc ~ .likesectionToc ~ .likesubsectionToc, .likechapterToc ~ .likesectionToc ~ .subsectionToc, .likechapterToc ~ .sectionToc ~ .likesubsectionToc, .likechapterToc ~ .sectionToc ~ .subsectionToc {padding-left:4em;margin-left:0;}

nav.TOC span{
  display:block;
  margin-top:0;
  font-size:0.8rem;
}

nav.TOC a, nav.TOC a:visited{
  text-decoration:none;
}

/* ************** */
/* *** Colors *** */
/* ************** */


/* body{background-color:#dce8d0;} */
/* It seems that dark background is better to my eyes */
body{background-color:#B8CDA3;} 

main.main-content, div.footnotes, main.titlepage{
  background-color:white;
}

nav.TOC,nav.TOC a, nav.TOC a:visited{
  background-color:#22211f;
  color:#cec1aa;
}

nav.TOC span:hover, nav.TOC span:hover *{
  background-color:#66635d;
}



figure.texsource, figure.shellcommand, figure.htmlsource, figure.luasource, figure.textsource{
  border:1px solid #cec1aa; 
  background-color:#d5e3c6;
}

/* ***************** */
/* *** Dark mode *** */
/* ***************** */

/* Code from https://ar.al/2021/08/24/implementing-dark-mode-in-a-handful-of-lines-of-css-with-css-filters/ */

@media (prefers-color-scheme: dark) {
  /* Invert all elements on the body while attempting to not alter the hue substantially. */
  body {
    filter: invert(100%) hue-rotate(180deg);
  }

  /* Workarounds and optical adjustments. */

  /* Firefox workaround: Set the background colour for the html
     element separately because, unlike other browsers, Firefox
     doesn’t apply the filter to the root element’s background. */
  html {
    background-color: #111;
  }

  /* Do not invert media (revert the invert). */
  img, video, iframe {
    filter: invert(100%) hue-rotate(180deg);
  }


  /* Re-enable code block backgrounds. */
  pre {
    filter: invert(6%);
  }

  /* Improve contrast on list item markers. */
  li::marker {
    color: #666;
  }
}