h2 {
  font-size: 180%;
  /* separator instead of <hr> tag */
  border-bottom: solid 5px #cbcacc;
  padding-bottom: 5px;
  margin-bottom: 5px;
}

h3 {
  font-size: 160%;
  margin-bottom: 0;
}

h4 {
  font-size: 140%;
  margin-bottom: 0;
}

h5 {
  font-size: 120%;
  margin-bottom: 0;
}

table {
  border: 1px solid #aaa;
  border-collapse:collapse;
}

table th {
  background-color: #706f6f;
  color: #cbcacc;
  border: 1px solid #aaa;
  padding:4px;
}

table td {
  border: 1px solid #aaa;
  padding:4px;
}

:root {
  --contents-width: 25em;
}

body[data-style="common"] {
  margin-left: var(--contents-width);
  padding: 1em;
  overflow-x: auto;
  width: calc(100vw - 25em);
  min-height: 100vh;
  box-sizing: border-box;
}

p.contents {
  flex: 0 0 25em;
  position: fixed;
  top: 0;
  left: 0;
  overflow-y: auto;
  background-color: #f5f5f5;
  border-right: 1px solid #ccc;
  box-sizing: border-box;
  width: var(--contents-width);
  background-color: #f0f0f0;
  height: 100vh;
  padding: 1em;
  font-family: sans-serif;
  font-weight: bold;
  z-index: 1;
}

ol.contents {
  flex: 0 0 25em;
  position: fixed;
  top: 2.5em;
  left: 1.0em;
  overflow-y: auto;
  background-color: #f5f5f5;
  border-right: 1px solid #ccc;
  box-sizing: border-box;
  width: 24em;
  background-color: #f0f0f0;
  height: calc(100vh - 2.5em);
  padding: 1em;
  font-family: sans-serif;
  z-index: 2;
}

main, footer {
  flex: 1;
  box-sizing: border-box;
}

hr {
  border: none;
  height: 5px;
  background-color: #cbcacc;
}

/* Remove bullets in case that img is in list, */
ul li:has(img) {
  list-style-type: none;
}

.caution {
  font-size: 150%;
  color: red;
}

.board-list {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  padding-bottom: 1rem;
}

.img-list {
  flex: 0 0 400px;
  width: 400px;
  text-align: center;
}

.img-list img {
  width: 400px;
  height: auto;
}

.table-list {
  flex: 0 0 auto;
  min-width: 500px;
  white-space: nowrap;
}

p, ul, ol {
  margin-top: 0;
  margin-bottom: 0;
}

.highlight {
  overflow: auto;
  padding: 0.1em;
  margin: 0.3em;
  border-radius: 3px;
}

.indented-0 {
  margin-left: 4.5ex;
}

.indented-1 {
  margin-left: 3ex;
}

.indented-2 {
  margin-left: 6ex;
}

.indented-3 {
  margin-left: 9ex;
}

.indented-ex {
  margin-left: 25ex;
}


@media screen and (max-width: 768px) {
  .contents {
    display: none;
  }


  body[data-style="common"] {
    font-size: 14px;
    padding: 10px;
    margin: 0;
    width: 100vw;
  }

  img {
    max-width: 100%;
    height: auto;
  }

  .language-plaintext {
    background-color: #cbcacc;
    padding: 0.1em;
    overflow-x: auto;  
    max-width: 100%;
    box-sizing: border-box;
  }
}

/* 
 * Header section/subsection number
 *
 * Note: h1 is not used as of now
 */
/* Setup variables */
html {
    counter-reset: chapter section subsection subsubsection;
}

/* Add number from counter value */
h2::before {
    counter-set: section 0;
    counter-increment: chapter;
    content: counter(chapter) ". ";
}
h3::before {
    counter-set: subsection 0;
    counter-increment: section;
    content: counter(chapter) "." counter(section) ". ";
}
h4::before {
    counter-set: subsubsection 0;
    counter-increment: subsection;
    content: counter(chapter) "." counter(section) "." counter(subsection)  ". ";
}
h5::before {
    counter-increment: subsubsection;
    content: counter(chapter) "." counter(section) "." counter(subsection)  "." counter(subsubsection) ". ";
}

/*
 * TOC section number
 */
#markdown-toc {
  list-style-type: none;
}
#markdown-toc ol {
  list-style-type: none;
  counter-reset: index;
}
#markdown-toc li {
  list-style-type: none;
  counter-increment: index;
}
#markdown-toc li::before {
  content: counters(index, ".") ". ";
}