/* less chimp, more bonobo — quiet typography */

:root {
  --bg: #fdfcf9;
  --fg: #1c1c1c;
  --muted: #6b6b6b;
  --rule: #d8d3c7;
  --accent: #4a3a28;
  --link: #5a3a1a;
  --link-hover: #2a1a08;
  --measure: 36rem;
}

* { box-sizing: border-box; }

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  font-size: 1.0625rem;
  line-height: 1.7;
  font-feature-settings: "kern", "liga", "onum";
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main, header, footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  padding-top: 4rem;
  padding-bottom: 2rem;
  text-align: left;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.005em;
  margin: 0 0 0.5rem 0;
  color: var(--fg);
}

.site-byline {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  font-style: italic;
}

main { padding-top: 1.5rem; padding-bottom: 4rem; }

article > section { margin: 2.5rem 0; }
article > section:first-of-type { margin-top: 1rem; }

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2.5rem 0 1.25rem;
  line-height: 1.35;
  color: var(--fg);
}

h2 .sec-num {
  display: inline-block;
  min-width: 1.75rem;
  color: var(--muted);
  font-weight: 400;
  font-variant-numeric: oldstyle-nums;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--fg);
}

p {
  margin: 0 0 1.15rem;
  hyphens: auto;
}

strong { font-weight: 600; color: var(--fg); }
em { font-style: italic; }

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-color: rgba(90, 58, 26, 0.35);
  text-underline-offset: 0.15em;
  transition: color 120ms ease, text-decoration-color 120ms ease;
}
a:hover, a:focus {
  color: var(--link-hover);
  text-decoration-color: currentColor;
}

hr {
  border: none;
  border-top: 1px solid var(--rule);
  width: 4rem;
  margin: 3rem 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.essay-toc {
  margin: 2rem 0;
}
.essay-toc .toc-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin: 0 0 0.75rem;
  font-style: normal;
}
.essay-toc ol {
  list-style: none;
  padding: 0;
  margin: 0;
}
.essay-toc li {
  padding: 0.2rem 0;
  font-size: 0.97rem;
  display: flex;
  align-items: baseline;
}
.essay-toc .toc-num {
  color: var(--muted);
  flex: 0 0 auto;
  min-width: 2.1rem;
  font-variant-numeric: oldstyle-nums;
}

.species-photo {
  margin: 2rem 0;
}
.species-photo img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 2px;
}
.species-photo figcaption {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.6rem;
  line-height: 1.55;
  font-style: italic;
}
.species-photo figcaption a {
  color: var(--muted);
  text-decoration-color: rgba(107, 107, 107, 0.4);
}
.species-photo figcaption a:hover,
.species-photo figcaption a:focus {
  color: var(--fg);
}

.cite-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 1.5rem;
  padding-top: 0.75rem;
  border-top: 1px dotted var(--rule);
}
.cite-intro { color: var(--muted); font-style: italic; }

ul.bib {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}
ul.bib li {
  font-size: 0.92rem;
  line-height: 1.55;
  margin: 0 0 0.75rem;
  padding-left: 1.25rem;
  text-indent: -1.25rem;
  color: #333;
  overflow-wrap: anywhere;
}
ul.bib li a {
  color: var(--link);
  text-decoration-color: rgba(90, 58, 26, 0.3);
}

.site-footer {
  border-top: 1px solid var(--rule);
  padding-top: 2rem;
  padding-bottom: 3rem;
  font-size: 0.88rem;
  color: var(--muted);
  text-align: left;
}
.site-footer p { margin: 0 0 0.4rem; }
.site-footer .links a { color: var(--muted); }
.site-footer .links a:hover { color: var(--fg); }
.site-footer .tedx-note { font-style: italic; margin-top: 0.75rem; }

::selection { background: #f0e7d4; color: var(--fg); }

@media (max-width: 480px) {
  html { font-size: 17px; }
  .site-header { padding-top: 2.5rem; padding-bottom: 1.5rem; }
  main, header, footer { padding-left: 1.25rem; padding-right: 1.25rem; }
  h2 { font-size: 1.15rem; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15140f;
    --fg: #e8e5dc;
    --muted: #908a7b;
    --rule: #3a362d;
    --accent: #d2c5a8;
    --link: #d4b888;
    --link-hover: #f0deb8;
  }
  ul.bib li { color: #c9c4b6; }
  ::selection { background: #4a3a1a; color: var(--fg); }
}

@media print {
  body { background: #fff; color: #000; }
  a { color: #000; text-decoration: none; }
  hr { border-color: #bbb; }
  .essay-toc { display: none; }
}