:root,
[data-theme='light'] {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.25vw, 1rem);
  --text-base: clamp(1.0625rem, 1rem + 0.2vw, 1.1875rem);
  --text-lg: clamp(1.25rem, 1.05rem + 0.75vw, 1.625rem);
  --text-xl: clamp(1.75rem, 1.25rem + 1.6vw, 2.75rem);
  --text-2xl: clamp(2.75rem, 1.4rem + 4vw, 5rem);
  --text-hero: clamp(4rem, 1rem + 9vw, 9rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-body: 'Manrope', 'Helvetica Neue', sans-serif;

  --color-bg: #f1eee5;
  --color-surface: #f8f5ed;
  --color-surface-2: #e6e2d6;
  --color-ink: #14231e;
  --color-text: #26322d;
  --color-muted: #677169;
  --color-faint: #8d958f;
  --color-border: rgba(20, 35, 30, 0.16);
  --color-accent: #286d52;
  --color-accent-strong: #174c39;
  --color-accent-soft: #cfdfd4;
  --color-copper: #a36138;
  --color-night: #0f1714;
  --color-night-text: #e9e6dc;

  --content: 1160px;
  --prose: 680px;
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
}

[data-theme='dark'] {
  --color-bg: #111713;
  --color-surface: #18201b;
  --color-surface-2: #202a24;
  --color-ink: #f0eee5;
  --color-text: #d3d8d3;
  --color-muted: #98a49c;
  --color-faint: #727d76;
  --color-border: rgba(236, 241, 236, 0.16);
  --color-accent: #78b89a;
  --color-accent-strong: #9ed0b5;
  --color-accent-soft: #263e32;
  --color-copper: #d09061;
  --color-night: #090e0b;
  --color-night-text: #f0eee5;
}

.skip-link {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 100;
  transform: translateY(-160%);
  padding: var(--space-3) var(--space-4);
  color: var(--color-bg);
  background: var(--color-ink);
}

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

.read-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 90;
  height: 3px;
  background: transparent;
}

.read-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--color-accent);
  transform-origin: left;
}

.site-header {
  position: fixed;
  inset: var(--space-3) var(--space-4) auto;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  padding: 0 var(--space-3) 0 var(--space-4);
  color: #f4f1e9;
  background: rgba(10, 16, 13, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 28px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-header nav > a {
  display: none;
  color: rgba(255, 255, 255, 0.72);
  font-size: var(--text-xs);
  font-weight: 600;
  text-decoration: none;
}

.site-header nav > a:hover {
  color: #fff;
}

.icon-button {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: var(--radius-sm);
}

.icon-button:hover {
  background: rgba(255, 255, 255, 0.08);
}

.icon-button svg {
  width: 20px;
}

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  color: var(--color-night-text);
  background: var(--color-night);
}

.hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 54% center;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 12, 9, 0.94) 0%, rgba(6, 12, 9, 0.68) 38%, rgba(6, 12, 9, 0.08) 72%),
    linear-gradient(0deg, rgba(6, 12, 9, 0.62), transparent 45%);
}

.hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100svh;
  max-width: var(--content);
  margin-inline: auto;
  padding: var(--space-32) var(--space-5) var(--space-24);
}

.kicker,
.section-label,
.mini-label {
  font-size: var(--text-xs);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.kicker {
  margin-bottom: var(--space-5);
  color: #9dc5aa;
}

.hero h1 {
  max-width: 11ch;
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 1rem + 7.4vw, 8rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.9;
}

.dek {
  max-width: 42ch;
  margin-top: var(--space-6);
  color: rgba(244, 241, 233, 0.78);
  font-size: var(--text-lg);
  line-height: 1.45;
}

.byline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin-top: var(--space-10);
  color: rgba(244, 241, 233, 0.66);
  font-size: var(--text-xs);
  font-weight: 600;
}

.byline span + span::before {
  content: '·';
  margin-right: var(--space-5);
}

.scroll-cue {
  position: absolute;
  right: var(--space-6);
  bottom: var(--space-6);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  color: rgba(244, 241, 233, 0.72);
  font-size: var(--text-xs);
  font-weight: 600;
  text-decoration: none;
}

.scroll-cue svg {
  width: 18px;
  animation: drift 1.8s ease-in-out infinite;
}

@keyframes drift {
  50% { transform: translateY(5px); }
}

.article-grid {
  display: grid;
  max-width: var(--content);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.opening {
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
}

.drop-lede {
  max-width: 35ch;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1.24;
}

.drop-cap {
  float: left;
  margin: -0.12em var(--space-3) -0.18em 0;
  color: var(--color-accent);
  font-size: 3.2em;
  line-height: 0.9;
}

.opening-thesis {
  max-width: 34ch;
  margin-top: var(--space-10);
  padding-top: var(--space-5);
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-lg);
}

.thesis-band {
  padding: clamp(var(--space-20), 10vw, var(--space-32)) var(--space-5);
  color: var(--color-night-text);
  background: var(--color-night);
}

.thesis-inner {
  max-width: 980px;
  margin-inline: auto;
}

.thesis-band .section-label {
  color: #82b294;
}

.thesis-band h2 {
  max-width: 14ch;
  margin-top: var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
}

.thesis-band p:not(.section-label) {
  max-width: 58ch;
  margin-top: var(--space-8);
  color: rgba(233, 230, 220, 0.72);
}

.thesis-band .thesis-line {
  color: var(--color-night-text);
  font-size: var(--text-lg);
}

.thesis-band .opening-refrain,
.thesis-band blockquote {
  color: var(--color-night-text);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.4;
}

.thesis-band blockquote {
  max-width: 58ch;
  margin-top: var(--space-8);
  padding: var(--space-5) 0 var(--space-5) var(--space-6);
  border-left: 1px solid #82b294;
}

.essay-section {
  position: relative;
  padding-block: clamp(var(--space-20), 10vw, var(--space-32));
}

.section-index {
  margin-bottom: var(--space-8);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
}

.prose {
  max-width: var(--prose);
}

.prose .section-label,
.sequence-head .section-label,
.system-copy .section-label,
.constitution .section-label,
.closing .section-label,
.notes .section-label {
  margin-bottom: var(--space-4);
  color: var(--color-accent);
}

.prose h2,
.sequence-head h2,
.system-copy h2,
.constitution h2,
.closing h2,
.notes h2 {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.025em;
}

.prose p {
  margin-top: var(--space-6);
  line-height: 1.78;
}

.prose em {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.08em;
}

.key-sentence {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.45 !important;
}

.note-ref {
  margin-left: 0.12em;
  color: var(--color-accent);
  font-size: 0.72em;
  font-weight: 700;
  text-decoration: none;
  vertical-align: super;
}

.margin-quote,
.fact-block {
  align-self: start;
  max-width: 340px;
  margin-top: var(--space-12);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-accent);
}

.margin-quote p {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1.2;
}

.fact-block {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: var(--space-4);
}

.fact-value {
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1;
  white-space: nowrap;
}

.fact-block p {
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.feature-figure {
  display: grid;
  max-width: var(--content);
  margin: 0 auto clamp(var(--space-12), 8vw, var(--space-24));
  padding-inline: var(--space-5);
}

.feature-figure img {
  width: 100%;
  max-height: 78svh;
  object-fit: cover;
  object-position: center 63%;
  background: var(--color-surface-2);
}

.feature-figure figcaption {
  max-width: 60ch;
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: var(--text-xs);
}

.distance-sequence {
  overflow: hidden;
  padding: clamp(var(--space-20), 10vw, var(--space-32)) var(--space-5);
  background: var(--color-surface);
}

.sequence-head,
.distance-sequence ol {
  max-width: var(--content);
  margin-inline: auto;
}

.sequence-intro {
  max-width: 62ch;
  margin-top: var(--space-5);
  color: var(--color-muted);
  font-size: var(--text-base);
  line-height: 1.65;
}

.distance-sequence ol {
  position: relative;
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-16);
  list-style: none;
}

.distance-sequence ol::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 7px;
  width: 1px;
  content: '';
  background: var(--color-border);
}

.distance-sequence li {
  position: relative;
  padding-left: var(--space-8);
}

.node {
  position: absolute;
  top: 0.4em;
  left: 1px;
  width: 13px;
  height: 13px;
  background: var(--color-surface);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
}

.era {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-muted);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.distance-sequence strong {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
}

.distance-sequence li p {
  max-width: 28ch;
  margin-top: var(--space-2);
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.interlude {
  max-width: 980px;
  margin: clamp(var(--space-12), 8vw, var(--space-24)) auto;
  padding: var(--space-12) var(--space-5);
  color: var(--color-night-text);
  background: var(--color-accent-strong);
}

.interlude .section-label {
  color: #b8d6c4;
}

.interlude blockquote {
  max-width: 20ch;
  margin-top: var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  line-height: 1.12;
}

.interlude > p:last-child {
  max-width: 58ch;
  margin-top: var(--space-8);
  color: rgba(240, 238, 229, 0.75);
}

.system-visual {
  display: grid;
  max-width: var(--content);
  margin: var(--space-12) auto var(--space-24);
  padding: var(--space-12) var(--space-5);
  border-block: 1px solid var(--color-border);
}

.system-copy p:last-child {
  max-width: 52ch;
  margin-top: var(--space-5);
  color: var(--color-muted);
}

.loop {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-10);
}

.loop-stage {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 0 var(--space-4);
  padding: var(--space-4);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.loop-stage span {
  grid-row: span 2;
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 700;
}

.loop-stage strong {
  color: var(--color-ink);
  font-size: var(--text-sm);
}

.loop-stage small {
  color: var(--color-muted);
  font-size: var(--text-xs);
}

.constitution {
  max-width: var(--content);
  margin: var(--space-12) auto var(--space-24);
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-5);
  color: var(--color-night-text);
  background: var(--color-night);
}

.constitution header {
  max-width: 780px;
}

.constitution h2 {
  color: var(--color-night-text);
}

.constitution-grid {
  display: grid;
  gap: var(--space-10);
  margin-top: var(--space-16);
}

.constitution-grid > div {
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.constitution .mini-label {
  color: #8fc2a3;
}

.constitution h3 {
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
}

.constitution-grid p {
  margin-top: var(--space-4);
  color: rgba(240, 238, 229, 0.68);
  font-size: var(--text-sm);
}

.closing {
  padding: clamp(var(--space-24), 12vw, 10rem) var(--space-5);
  background: var(--color-accent-soft);
}

.closing-inner {
  max-width: 780px;
  margin-inline: auto;
}

.closing-inner > p:not(.section-label) {
  margin-top: var(--space-6);
  line-height: 1.78;
}

.closing blockquote {
  margin-block: var(--space-16);
  padding-block: var(--space-8);
  color: var(--color-ink);
  border-block: 1px solid var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1.35;
}

.final-line {
  color: var(--color-ink);
  font-weight: 700;
}

.notes {
  padding: clamp(var(--space-20), 10vw, var(--space-32)) var(--space-5);
}

.notes-inner {
  max-width: 900px;
  margin-inline: auto;
}

.notes ol {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-10);
  padding-left: var(--space-6);
}

.notes li {
  padding-left: var(--space-2);
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.65;
}

.notes a {
  color: var(--color-accent-strong);
  text-underline-offset: 0.2em;
}

.editorial-note {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-sm);
}

footer {
  display: grid;
  gap: var(--space-8);
  padding: var(--space-12) var(--space-5);
  color: rgba(240, 238, 229, 0.68);
  background: var(--color-night);
  font-size: var(--text-sm);
}

footer > div {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

footer strong {
  color: var(--color-night-text);
}

.footer-mark {
  width: 36px;
  color: #83b997;
}

footer > p {
  max-width: 42ch;
}

@media (min-width: 720px) {
  .site-header {
    inset-inline: var(--space-6);
  }

  .site-header nav > a {
    display: block;
  }

  .hero-copy {
    padding-inline: var(--space-10);
  }

  .article-grid,
  .feature-figure,
  .sequence-head,
  .distance-sequence ol,
  .system-visual,
  .constitution {
    padding-inline: var(--space-10);
  }

  .opening {
    grid-template-columns: minmax(0, 1.8fr) minmax(240px, 0.8fr);
    gap: var(--space-16);
    align-items: end;
  }

  .opening-thesis {
    margin-top: 0;
  }

  .essay-section {
    grid-template-columns: 56px minmax(0, var(--prose)) minmax(220px, 1fr);
    gap: var(--space-8);
  }

  .section-index {
    padding-top: 2px;
  }

  .margin-quote,
  .fact-block {
    margin-top: var(--space-24);
  }

  .feature-figure {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: var(--space-6);
    align-items: end;
  }

  .feature-figure img {
    grid-row: 1;
  }

  .distance-sequence ol {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-5);
  }

  .distance-sequence ol::before {
    top: 7px;
    right: var(--space-10);
    bottom: auto;
    left: var(--space-10);
    width: auto;
    height: 1px;
  }

  .distance-sequence li {
    padding: var(--space-8) 0 0;
  }

  .node {
    top: 1px;
    left: 0;
  }

  .system-visual {
    grid-template-columns: 0.85fr 1.5fr;
    gap: var(--space-16);
    align-items: start;
  }

  .loop {
    grid-template-columns: repeat(5, 1fr);
    margin-top: 0;
  }

  .loop-stage {
    grid-template-columns: 1fr;
    align-content: start;
    min-height: 160px;
    border-bottom: 0;
    border-left: 1px solid var(--color-border);
  }

  .loop-stage span {
    grid-row: auto;
    margin-bottom: var(--space-8);
  }

  .loop-stage small {
    margin-top: var(--space-2);
  }

  .constitution-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }

  footer {
    grid-template-columns: 1fr auto;
    align-items: end;
    padding-inline: var(--space-10);
  }
}

@media (min-width: 1200px) {
  .site-header {
    right: var(--space-8);
    left: var(--space-8);
  }

  .hero-copy {
    padding-inline: 0;
  }

  .article-grid,
  .feature-figure,
  .sequence-head,
  .distance-sequence ol,
  .system-visual,
  .constitution {
    padding-inline: 0;
  }
}

@media print {
  :root {
    --color-bg: #fff;
    --color-surface: #fff;
    --color-text: #202622;
    --color-ink: #111;
  }

  .site-header,
  .read-progress,
  .scroll-cue {
    display: none;
  }

  .hero {
    min-height: 70vh;
    break-after: page;
  }

  .essay-section,
  .closing,
  .notes {
    break-inside: avoid;
  }

  a {
    text-decoration: none;
  }
}