:root {
  color-scheme: light dark;
  --canvas: #f2f0e9;
  --surface: #e7e5dc;
  --ink: #171814;
  --muted: #606258;
  --accent: #536a42;
  --line: color-mix(in srgb, var(--ink) 18%, transparent);
  --shell: 78rem;
  --gutter: clamp(1.25rem, 4vw, 4rem);
  --section-space: clamp(5rem, 11vw, 10rem);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  font-synthesis: none;
  line-height: 1.5;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-size: 1rem;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 0.18rem solid var(--accent);
  outline-offset: 0.3rem;
}

.shell {
  width: min(100%, var(--shell));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: 1rem;
  left: 1rem;
  padding: 0.65rem 1rem;
  background: var(--ink);
  color: var(--canvas);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  border-bottom: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.header-inner {
  display: grid;
  min-height: 5.25rem;
  align-items: center;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
}

.wordmark {
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border: 1px solid currentColor;
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: -0.04em;
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease;
}

.wordmark:hover {
  background: var(--ink);
  color: var(--canvas);
}

.decimal-clock {
  color: var(--muted);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

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

.primary-nav ul,
.site-footer ul {
  display: flex;
  margin: 0;
  padding: 0;
  gap: clamp(1rem, 3vw, 2.5rem);
  list-style: none;
}

.primary-nav a,
.site-footer a {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.primary-nav a:hover,
.site-footer a:hover {
  color: var(--ink);
}

.primary-nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 0.12rem;
  text-underline-offset: 0.45rem;
}

.eyebrow,
.section-number {
  margin: 0;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.text-link {
  display: inline-block;
  align-self: end;
  justify-self: start;
  padding-block: 0.25rem;
  border-bottom: 1px solid var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.content {
  padding-bottom: var(--section-space);
}

.home-content {
  padding-top: clamp(3rem, 7vw, 6rem);
}

.home-content .content-section:first-of-type {
  border-top: 0;
}

.content-section {
  display: grid;
  padding-block: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--line);
  grid-template-columns: minmax(5rem, 0.35fr) minmax(0, 1.65fr);
}

.content-section h2 {
  margin: 0 0 1rem;
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.75rem, 3.2vw, 2.75rem);
  font-weight: 400;
  letter-spacing: 0.005em;
  line-height: 1.15;
}

.content-section > div > p,
.entry-preview > p:last-child {
  max-width: 35rem;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
}

.content-section > div > .text-link {
  margin-top: 1.5rem;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-heading h2 {
  margin-bottom: 0;
}

.entry-preview {
  display: grid;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  grid-template-columns: minmax(6rem, 0.35fr) minmax(0, 1.15fr) minmax(12rem, 0.5fr);
  gap: 2rem;
}

.entry-preview .entry-meta {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.entry-preview h3 {
  margin: 0;
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.005em;
  line-height: 1.18;
}

.page-main {
  min-height: calc(100svh - 13.3rem);
  padding-block: clamp(5rem, 11vw, 10rem);
}

.page-header {
  display: grid;
  padding-bottom: var(--section-space);
  grid-template-columns: minmax(5rem, 0.35fr) minmax(0, 1.65fr);
}

.page-header h1 {
  max-width: 12ch;
  margin: 0;
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(2.4rem, 5.1vw, 4.4rem);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.08;
}

.page-body,
.empty-state {
  display: grid;
  padding-block: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
  grid-template-columns: minmax(5rem, 0.35fr) minmax(0, 1.65fr);
}

.page-body h2,
.empty-state h2 {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-body p,
.empty-state p {
  max-width: 38rem;
  margin: 0;
  color: var(--muted);
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.25rem, 2.2vw, 1.8rem);
  line-height: 1.5;
}

.about-groups,
.publication-list {
  border-top: 1px solid var(--line);
}

.link-group {
  display: grid;
  padding-block: clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--line);
  grid-template-columns: minmax(5rem, 0.35fr) minmax(0, 1.65fr);
}

.link-group h2 {
  margin: 0;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.bio-copy {
  max-width: 44rem;
}

.bio-copy p {
  margin: 0;
  color: var(--muted);
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.2rem, 2vw, 1.65rem);
  line-height: 1.55;
}

.bio-copy p + p {
  margin-top: 1.25em;
}

.link-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.link-list li + li {
  margin-top: 0.85rem;
}

.link-list a {
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.25rem, 2.2vw, 1.8rem);
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

.publication {
  display: grid;
  padding-block: clamp(3.5rem, 7vw, 6rem);
  border-bottom: 1px solid var(--line);
  grid-template-columns: minmax(10rem, 0.35fr) minmax(0, 1.65fr);
  gap: clamp(2rem, 6vw, 6rem);
}

.link-group:last-child,
.publication:last-child {
  border-bottom: 0;
}

.publication-meta {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.publication-meta time {
  color: var(--accent);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-variant-numeric: tabular-nums;
}

.publication-meta p {
  margin: 0.65rem 0 0;
}

.publication-content h2 {
  max-width: 22ch;
  margin: 0;
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.8rem, 3.6vw, 3.1rem);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.1;
}

.authors {
  margin: 1.25rem 0 clamp(2.5rem, 5vw, 4rem);
  color: var(--muted);
  font-size: 0.9rem;
}

.publication-content h3 {
  margin: 0 0 0.85rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.publication-content > p:not(.authors) {
  max-width: 48rem;
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.65;
}

.doi-link {
  display: inline-block;
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  overflow-wrap: anywhere;
  text-underline-offset: 0.25em;
}

.entry-preview h3 a {
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.note-list {
  border-top: 1px solid var(--line);
}

.empty-state {
  padding-block: clamp(3.5rem, 7vw, 6rem);
}

.empty-state p {
  max-width: 36rem;
  margin: 0;
  color: var(--muted);
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
}

.note-card {
  display: grid;
  padding-block: clamp(3.5rem, 7vw, 6rem);
  grid-template-columns: minmax(10rem, 0.35fr) minmax(0, 1.65fr);
  gap: clamp(2rem, 6vw, 6rem);
}

.note-meta,
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  color: var(--accent);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.note-card h2 {
  max-width: 24ch;
  margin: 0;
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.8rem, 3.6vw, 3.1rem);
  font-weight: 400;
  line-height: 1.1;
}

.note-card h2 a {
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.note-card > div > p {
  max-width: 42rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: 1.1rem;
  line-height: 1.6;
}

.article-main {
  padding-block: clamp(5rem, 10vw, 9rem);
}

.article-header,
.article-body {
  width: min(100%, 48rem);
  margin-inline: auto;
}

.article-header {
  padding-bottom: clamp(4rem, 9vw, 7rem);
}

.article-header h1 {
  margin: 1.5rem 0 2rem;
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.04;
}

.article-lede {
  margin: 0;
  color: var(--muted);
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  line-height: 1.5;
}

.article-body {
  font-family: Charter, "Bitstream Charter", Georgia, serif;
  font-size: clamp(1.05rem, 1.4vw, 1.18rem);
  line-height: 1.75;
}

.article-body h2 {
  margin: 3.5rem 0 1.1rem;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1.35rem, 2.5vw, 1.8rem);
  font-weight: 500;
  line-height: 1.25;
}

.article-body p {
  margin: 0 0 1.35rem;
}

.article-body ol,
.article-body ul {
  padding-left: 1.35rem;
}

.article-body li + li {
  margin-top: 1rem;
}

.article-note {
  padding-left: 1.25rem;
  border-left: 0.2rem solid var(--accent);
  color: var(--muted);
  font-style: italic;
}

.article-disclosure {
  margin-top: clamp(4rem, 8vw, 7rem);
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

.article-disclosure h2 {
  color: var(--ink);
}

.article-sources {
  margin-top: clamp(3rem, 6vw, 5rem);
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.article-sources a {
  color: var(--ink);
  text-underline-offset: 0.2em;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  min-height: 8rem;
}

.footer-inner > p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

@media (max-width: 47rem) {
  .header-inner {
    min-height: auto;
    padding-block: 0.75rem 0.8rem;
    grid-template-areas:
      "brand nav"
      "clock clock";
    grid-template-columns: 1fr auto;
    gap: 0.65rem 1rem;
  }

  .wordmark {
    grid-area: brand;
  }

  .decimal-clock {
    grid-area: clock;
    justify-self: start;
  }

  .primary-nav {
    grid-area: nav;
  }

  .primary-nav ul {
    gap: clamp(0.55rem, 2.5vw, 1rem);
  }

  .primary-nav a {
    font-size: clamp(0.62rem, 2.1vw, 0.7rem);
    letter-spacing: 0.035em;
  }

  .content-section {
    gap: 1.5rem;
    grid-template-columns: 1fr;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }

  .entry-preview {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .page-header,
  .page-body,
  .empty-state,
  .link-group,
  .publication {
    gap: 1.5rem;
    grid-template-columns: 1fr;
  }

  .note-card {
    gap: 1.5rem;
    grid-template-columns: 1fr;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #171814;
    --surface: #22231e;
    --ink: #eeede6;
    --muted: #b5b6aa;
    --accent: #a4bd8a;
  }
}