/* Improve long-form reading without changing the installed vignette format. */
.navbar-brand {
  align-items: center;
  display: inline-flex;
  gap: 0.5rem;
  padding-bottom: 0;
  padding-top: 0;
  position: relative;
  top: 0.55rem;
}

.navbar-brand::before {
  background: #ffffff url("https://www.neche.org/wp-content/uploads/2023/06/CU_Seal_Red_SM-768x768.webp") center / contain no-repeat;
  border-radius: 50%;
  content: "";
  display: inline-block;
  height: 2rem;
  width: 2rem;
}

#main {
  font-size: 1.125rem;
  line-height: 1.65;
}

#main > .section.level2 > h2 {
  font-size: 1.8rem;
  margin-top: 2.25rem;
}

#main > .section.level2 > .section.level3 > h3:not([data-toc-skip]) {
  font-size: 1.4rem;
  margin-top: 1.75rem;
}

#main > .section.level2 > .section.level3 > .section.level4 > h4 {
  font-size: 1.2rem;
}

#main .section.level5 > h5 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
}

#main .section.level6 > h6 {
  font-size: 1rem;
  margin-top: 1.25rem;
}

.section-number {
  margin-right: 0.25rem;
}

/* Show only the active heading's branch in the article TOC. */
.template-article #toc > .nav .nav {
  display: none !important;
}

.template-article #toc > .nav li.toc-open > .nav {
  display: flex !important;
  flex-direction: column;
}

.template-article #toc .nav li {
  position: relative;
}

.template-article #toc .nav .nav {
  margin-left: 0.75rem;
}

.template-article #toc .nav .nav > li > .nav-link {
  margin-left: 0;
}

.template-article #toc .nav li > .nav-link {
  padding-left: 1.25rem;
}

.toc-toggle {
  background: transparent;
  border: 0;
  color: inherit;
  height: 1.75rem;
  padding: 0;
  position: absolute;
  left: 0.25rem;
  top: 0;
  width: 1rem;
}

.toc-toggle::before {
  content: "\25B8";
}

li.toc-open > .toc-toggle::before {
  content: "\25BE";
}

#main pre,
#main pre code {
  background: #191919;
  color: #f5f5f5;
  font-size: 0.9em;
  line-height: 1.5;
}

/* Base graphics are transparent PNGs with dark axes and labels. */
#main img[src*="figure-html"] {
  background: #ffffff;
}

/* Keep code and bibliographic output readable on the Darkly background. */
#main pre.sourceCode span {
  color: #f5f5f5 !important;
}

#main .citation,
#main .csl-entry,
#main .references {
  color: #f5f5f5;
}