@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("../fonts/AtkinsonHyperlegible-Regular.woff2") format("woff2"),
       url("../fonts/AtkinsonHyperlegible-Regular.woff") format("woff"),
       url("../fonts/AtkinsonHyperlegible-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("../fonts/AtkinsonHyperlegible-Italic.woff2") format("woff2"),
       url("../fonts/AtkinsonHyperlegible-Italic.woff") format("woff"),
       url("../fonts/AtkinsonHyperlegible-Italic.ttf") format("truetype");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("../fonts/AtkinsonHyperlegible-Bold.woff2") format("woff2"),
       url("../fonts/AtkinsonHyperlegible-Bold.woff") format("woff"),
       url("../fonts/AtkinsonHyperlegible-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("../fonts/AtkinsonHyperlegible-BoldItalic.woff2") format("woff2"),
       url("../fonts/AtkinsonHyperlegible-BoldItalic.woff") format("woff"),
       url("../fonts/AtkinsonHyperlegible-BoldItalic.ttf") format("truetype");
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Libre Baskerville";
  src: url("../fonts/LibreBaskerville-Regular.woff2") format("woff2"),
       url("../fonts/LibreBaskerville-Regular.woff") format("woff"),
       url("../fonts/LibreBaskerville-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Libre Baskerville";
  src: url("../fonts/LibreBaskerville-Italic.woff2") format("woff2"),
       url("../fonts/LibreBaskerville-Italic.woff") format("woff"),
       url("../fonts/LibreBaskerville-Italic.ttf") format("truetype");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "Libre Baskerville";
  src: url("../fonts/LibreBaskerville-Bold.woff2") format("woff2"),
       url("../fonts/LibreBaskerville-Bold.woff") format("woff"),
       url("../fonts/LibreBaskerville-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--background);
  color: var(--text-color);
  font-family: "Atkinson Hyperlegible", system-ui, sans-serif;
  line-height: 1.65;
}

.container {
  max-width: 72ch;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.site-header {
  position: relative;
  background-color: var(--background);
  background-image: var(--banner-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-bottom: 1px solid var(--border-grey);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(245, 245, 245, 0.82);
}

.site-header .container {
  position: relative;
  padding-top: 3rem;
  padding-bottom: 2.5rem;
}

.site-footer {
  border-top: 1px solid var(--border-grey);
  color: var(--muted-text);
  font-size: 0.85rem;
}

.site-title {
  font-family: "Libre Baskerville", serif;
  font-size: 1.6rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--heading-color);
}

.site-tagline {
  color: var(--muted-text);
  font-size: 0.9rem;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Libre Baskerville", serif;
  color: var(--heading-color);
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.25;
}

article h1 {
  font-size: 2.1rem;
}

section h1 {
  font-size: 1.8rem;
}

sup a.footnote-reference {
  text-decoration: none;
  font-weight: 700;
}

.footnotes {
  border-top: 1px solid var(--border-grey);
  margin-top: 2rem;
  padding-top: 1.5rem;
  font-size: 0.95rem;
  color: var(--muted-text);
}

.footnotes ol {
  margin-left: 1.25rem;
}

.footnotes li {
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--link-color);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--muted-text);
}

a:focus-visible,
.timeline-link:focus-visible,
.chapter-nav a:focus-visible {
  outline: 2px solid var(--heading-color);
  outline-offset: 3px;
}

.meta,
.summary {
  color: var(--muted-text);
  font-size: 0.9rem;
}

.content {
  margin-top: 2rem;
}

.sources {
  border-top: 1px solid var(--border-grey);
  margin-top: 2rem;
  padding-top: 1.5rem;
}

.sources h2 {
  margin-top: 0;
}

.sources ol {
  margin-left: 1.25rem;
}

.sources-global li {
  scroll-margin-top: 6rem;
}

.source-note {
  margin: 0.5rem 0 0;
  color: var(--muted-text);
  font-size: 0.95rem;
}

ul, ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

pre, code {
  background: var(--code-bg);
  color: var(--text-color);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco,
               Consolas, "Liberation Mono", monospace;
}

pre {
  padding: 1rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.post-listing {
  margin-bottom: 2rem;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18rem;
  gap: 2rem;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.page-main {
  min-width: 0;
}

.timeline {
  position: sticky;
  top: 2rem;
  align-self: start;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border-grey);
  color: var(--muted-text);
  font-size: 0.9rem;
}

.timeline h2 {
  margin-top: 0;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline ol {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.timeline li {
  position: relative;
  margin-bottom: 1.5rem;
  padding-left: 1rem;
}

.timeline-link {
  color: inherit;
  text-decoration: none;
  display: block;
}

.timeline-link:hover .timeline-day,
.timeline-link:hover p {
  color: var(--link-color);
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -1.55rem;
  top: 0.35rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: var(--heading-color);
}

.timeline-day {
  display: block;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 0.25rem;
}

.timeline p {
  margin: 0;
}

.chapter-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.5rem;
  margin: 2rem 0 1rem;
  font-size: 0.95rem;
}

.chapter-nav a {
  color: var(--link-color);
  text-decoration: none;
  border-bottom: 1px solid var(--link-color);
}

.chapter-nav a:hover {
  color: var(--muted-text);
  border-bottom-color: var(--muted-text);
}

.nav-disabled {
  color: var(--muted-text);
}

.nav-prev {
  justify-self: start;
}

.nav-index {
  justify-self: center;
}

.nav-next {
  justify-self: end;
}

@media (max-width: 640px) {
  .page-layout {
    grid-template-columns: 1fr;
  }

  .page-layout {
    padding: 1.5rem 1rem;
  }

  .timeline {
    position: static;
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--border-grey);
    padding-top: 1.5rem;
    margin-top: 2rem;
  }

  .timeline li {
    padding-left: 0;
  }

  .timeline li::before {
    display: none;
  }

  .chapter-nav {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
}