/* Keith Vaughan — experimental archive
   Design system: tokens in :root, recipes in design/SYSTEM.md */

@import url("https://api.fontshare.com/v2/css?f[]=satoshi@400,500,700&f[]=sentient@400,500&display=swap");
@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  /* —— Color —— */
  --paper: #f9f9f9;
  --sand: #e6e3e0;
  --sand-2: #e0dcd8;
  --sand-deep: #d4cfc9;
  --sand-4: #ccc6bf;
  --ink: #161616;
  --ink-raised: #1c1c1c;
  --ink-3: #242424;
  --void: #0a0a0b;
  --fg: #1e1e1e;
  --fg-muted: #78736e;
  --fg-faint: #a39e99;
  --fg-on-void: #ededed;
  --fg-on-art: color-mix(in srgb, var(--fg-on-void) 88%, var(--void));
  --muted-on-void: #9a9aa0;
  --rule: rgba(255, 255, 255, 0.1);
  --rule-light: #85807b2e;
  --signal: #0d3cfc;
  --signal-hover: #0b34d6;

  --tag-cipher: #307e77;
  --tag-cipher-wash: #c9d4d2;
  --tag-sumosign: #0d3cfc;
  --tag-sumosign-wash: #d4dbf5;
  --tag-frontier: #724577;
  --tag-frontier-wash: #d2c9d4;
  --tag-techops: #774554;
  --tag-techops-wash: #e5c8ca;

  /* —— Type —— */
  --font-sans: "Satoshi", "Helvetica Neue", system-ui, sans-serif;
  --font-serif: "Sentient", "Newsreader", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --step--1: clamp(0.8125rem, 0.78rem + 0.15vw, 0.875rem);
  --step-0: clamp(0.9375rem, 0.9rem + 0.2vw, 1.0625rem);
  --step-1: clamp(1.125rem, 1.05rem + 0.4vw, 1.375rem);
  --step-2: clamp(1.375rem, 1.2rem + 0.9vw, 1.875rem);
  --step-3: clamp(1.75rem, 1.4rem + 1.6vw, 2.75rem);
  --step-4: clamp(2.25rem, 1.7rem + 2.6vw, 3.8rem);

  --leading-tight: 1.05;
  --leading-snug: 1.2;
  --leading-body: 1.55;
  --leading-prose: 1.6;

  /* —— Space scale (4px base) —— */
  --space-1: 0.25rem;   /* 4 */
  --space-2: 0.5rem;    /* 8 */
  --space-3: 0.75rem;   /* 12 */
  --space-4: 1rem;      /* 16 */
  --space-5: 1.25rem;   /* 20 */
  --space-6: 1.5rem;    /* 24 */
  --space-7: 2rem;      /* 32 */
  --space-8: 2.5rem;    /* 40 */
  --space-9: 3rem;      /* 48 */
  --space-10: 4rem;     /* 64 */

  /* Stack gaps (vertical rhythm inside a block) */
  --stack-2xs: var(--space-2);
  --stack-xs: var(--space-3);
  --stack-sm: var(--space-4);
  --stack-md: var(--space-5);
  --stack-lg: var(--space-6);
  --stack-xl: var(--space-8);
  --stack-2xl: var(--space-10);

  /* Section rhythm (page bands) */
  --section-sm: clamp(2.5rem, 4vw, 3.5rem);
  --section-md: clamp(4rem, 7vw, 6rem);
  --section-lg: clamp(5.5rem, 9vw, 8rem);

  /* List / row padding — one value sitewide */
  --row-pad-y: var(--space-6);

  /* Chrome + layout */
  --measure: 66ch;
  --page-max: 72rem;
  --gutter: clamp(1.25rem, 0.9rem + 2vw, 3rem);
  --nav-h: 3.75rem;
  --hairline: 1px;
  --radius-tag: 2px;

  /* Motion */
  --ease: cubic-bezier(0.215, 0.61, 0.355, 1);
  --ease-ui: cubic-bezier(0.215, 0.61, 0.355, 1);
  --fast: 0.2s;
  --base: 0.36s;
  --slow: 0.6s;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: var(--leading-body);
  letter-spacing: 0;
  color: var(--fg);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-landing {
  color: var(--fg);
  background: var(--paper);
}

body.is-void {
  color: var(--fg-on-void);
  background: var(--void);
}

body.is-paper {
  color: var(--fg);
  background: var(--paper);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color var(--fast) var(--ease-ui);
}

a:hover {
  color: var(--signal);
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -100%;
  z-index: 100;
  padding: var(--space-2) var(--space-3);
  background: var(--paper);
  color: var(--fg);
  font-size: var(--step--1);
  font-weight: 500;
}

.skip-link:focus {
  top: var(--space-3);
}

/* —— Labels (micro UI) —— */
.label {
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.3;
}

/* —— Chrome ——
   Surfaces:
   - paper pages  → quiet paper bar (matches content)
   - void pages   → quiet void bar
   - landing/essay over art → transparent until scroll, then paper bar
*/
.masthead {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: var(--nav-h);
  padding: 0 var(--gutter);
  pointer-events: none;
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: var(--hairline) solid var(--rule-light);
  transition:
    background var(--base) var(--ease),
    backdrop-filter var(--base) var(--ease),
    border-color var(--base) var(--ease);
}

.masthead > * {
  pointer-events: auto;
}

/* Void archive chrome */
body.is-void .masthead {
  background: color-mix(in srgb, var(--void) 92%, transparent);
  border-bottom-color: var(--rule);
}

/* Art overlays: no bar until scrolled */
body.is-landing:not(.is-scrolled) .masthead,
body.is-essay:not(.is-scrolled) .masthead {
  background: transparent;
  backdrop-filter: none;
  border-bottom-color: transparent;
}

body.is-essay:not(.is-scrolled) .masthead {
  background: linear-gradient(180deg, rgba(10, 10, 11, 0.5), transparent);
}

body.is-landing.is-scrolled .masthead,
body.is-essay.is-scrolled .masthead {
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--rule-light);
}

.wordmark {
  font-family: var(--font-serif);
  font-size: var(--step-0);
  font-weight: 500;
  letter-spacing: -0.02em;
  text-transform: none;
  text-decoration: none;
  color: var(--fg);
  line-height: 1.2;
}

body.is-void .masthead .wordmark,
body.is-landing:not(.is-scrolled) .masthead .wordmark,
body.is-essay:not(.is-scrolled) .masthead .wordmark {
  color: var(--fg-on-void);
}

body.is-landing.is-scrolled .masthead .wordmark,
body.is-essay.is-scrolled .masthead .wordmark {
  color: var(--fg);
}

.masthead .wordmark:hover {
  color: var(--signal);
}

/* Footer brand — light on ink; masthead scroll rules must not apply here */
.wordmark--on-ink,
.site-footer-rich .wordmark {
  font-size: var(--step-1);
  letter-spacing: -0.025em;
  color: var(--fg-on-void);
}

.wordmark--on-ink:hover,
.site-footer-rich .wordmark:hover {
  color: var(--signal);
}

.nav-facets {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-facets a {
  position: relative;
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--fg-muted);
  line-height: 1.3;
  padding: var(--space-2) 0;
}

/* Same micro label as .page-kicker */
body.is-void .nav-facets a,
body.is-landing:not(.is-scrolled) .nav-facets a,
body.is-essay:not(.is-scrolled) .nav-facets a {
  color: var(--muted-on-void);
}

.nav-facets a:hover {
  color: var(--fg);
}

body.is-void .nav-facets a:hover,
body.is-landing:not(.is-scrolled) .nav-facets a:hover,
body.is-essay:not(.is-scrolled) .nav-facets a:hover {
  color: var(--fg-on-void);
}

body.is-landing.is-scrolled .nav-facets a,
body.is-essay.is-scrolled .nav-facets a {
  color: var(--fg-muted);
}

body.is-landing.is-scrolled .nav-facets a:hover,
body.is-essay.is-scrolled .nav-facets a:hover {
  color: var(--fg);
}

/* Active facet: ink + hairline, not signal (signal = action only) */
.nav-facets a[aria-current="page"] {
  color: var(--fg);
}

.nav-facets a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--hairline);
  background: currentColor;
  opacity: 0.55;
}

body.is-void .nav-facets a[aria-current="page"],
body.is-landing:not(.is-scrolled) .nav-facets a[aria-current="page"],
body.is-essay:not(.is-scrolled) .nav-facets a[aria-current="page"] {
  color: var(--fg-on-void);
}

body.is-landing.is-scrolled .nav-facets a[aria-current="page"],
body.is-essay.is-scrolled .nav-facets a[aria-current="page"] {
  color: var(--fg);
}

.nav-toggle {
  display: none;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--fg-muted);
  font-family: var(--font-sans);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.3;
  cursor: pointer;
  padding: var(--space-2) 0;
}

body.is-void .nav-toggle,
body.is-landing:not(.is-scrolled) .nav-toggle,
body.is-essay:not(.is-scrolled) .nav-toggle {
  color: var(--fg-on-void);
}

body.is-landing.is-scrolled .nav-toggle,
body.is-essay.is-scrolled .nav-toggle {
  color: var(--fg-muted);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6) var(--gutter) var(--space-7);
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--fg-faint);
  background: var(--paper);
  border-top: var(--hairline) solid var(--rule-light);
}

.site-footer a {
  text-decoration: none;
  color: inherit;
}

.site-footer a:hover {
  color: var(--signal);
}

.footer-meta {
  display: flex;
  gap: var(--space-5);
  align-items: center;
  flex-wrap: wrap;
}

.footer-meta a.tiny {
  opacity: 0.75;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.01em;
  text-transform: none;
}

/* —— Landing —— */
.landing-hero {
  position: relative;
  min-height: 100dvh;
  color: var(--fg-on-void);
  overflow: clip;
}

.landing-stage {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--void);
}

.landing-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(
      130% 95% at 8% 92%,
      rgba(10, 10, 11, 0.78) 0%,
      rgba(10, 10, 11, 0.42) 38%,
      transparent 68%
    ),
    linear-gradient(
      180deg,
      rgba(10, 10, 11, 0.2) 0%,
      transparent 34%,
      transparent 58%,
      rgba(10, 10, 11, 0.22) 100%
    );
}

.landing-art {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  background-color: var(--void);
  animation: art-breathe var(--slow) var(--ease) both;
}

.landing-copy {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100dvh;
  padding: calc(var(--nav-h) + var(--space-6)) var(--gutter) var(--space-10);
  max-width: min(40rem, 100%);
  animation: copy-in calc(var(--slow) + 0.15s) var(--ease) both;
}

.mono-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--stack-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted-on-void);
}

.mono-dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 14px rgba(13, 60, 252, 0.75);
}

.landing-thesis {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2.1rem, 1.5rem + 2.6vw, 3.55rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: var(--leading-tight);
  color: var(--fg-on-void);
  text-wrap: balance;
}

.landing-support {
  margin: var(--stack-md) 0 0;
  max-width: 48ch;
  font-size: var(--step-0);
  font-weight: 400;
  line-height: var(--leading-snug);
  color: var(--fg-on-art);
}

.landing-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4) var(--space-6);
  margin-top: var(--stack-xl);
}

.text-link {
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--fg-on-void);
}

.text-link:hover {
  color: var(--signal);
}

.mono-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  text-transform: none;
  color: var(--fg-on-art);
}

.mono-link:hover {
  color: var(--signal);
}

.landing-corners {
  position: absolute;
  inset: auto 0 var(--space-5);
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 var(--gutter);
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--fg-on-art);
}

.landing-corners a {
  text-decoration: none;
  color: inherit;
}

.landing-corners a:hover {
  color: var(--signal);
}

/* —— Page shell —— */
.shell {
  width: min(100% - (var(--gutter) * 2), var(--page-max));
  margin-inline: auto;
}

.shell-narrow {
  width: min(100% - (var(--gutter) * 2), var(--measure));
  margin-inline: auto;
}

/* Single-surface pages (writing index, facts) */
.page {
  padding-top: calc(var(--nav-h) + var(--section-sm));
  padding-bottom: var(--section-md);
}

/* Multi-band pages: first band clears the masthead */
.band {
  padding-block: var(--section-md);
}

.band.page-start,
.page-start {
  padding-top: calc(var(--nav-h) + var(--section-sm));
}

.band--sand {
  background: var(--sand);
  color: var(--fg);
}

.band--paper {
  background: var(--paper);
  color: var(--fg);
}

.band--ink {
  background: var(--ink);
  color: var(--fg-on-void);
}

/* Continuation band: no extra top air after a same-surface section */
.band--pointers {
  padding-top: 0;
}

/* Page / band headers — identical stack */
.page-head,
.band-head {
  margin-bottom: var(--section-sm);
}

.page-kicker {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin: 0 0 var(--stack-xs);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.is-void .page-kicker {
  color: var(--muted-on-void);
}

.page-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--step-4);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: var(--leading-tight);
}

.page-standfirst {
  margin: var(--stack-sm) 0 0;
  max-width: 44ch;
  color: var(--fg-muted);
  font-family: var(--font-sans);
  font-size: var(--step-1);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.4;
}

.is-void .page-standfirst {
  color: var(--muted-on-void);
}

.band-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4) var(--space-7);
}

.band-title-row .page-title {
  font-size: var(--step-3);
}

.band-all {
  color: var(--fg);
}

.home-band .text-link {
  color: var(--fg);
}

.reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition:
    opacity var(--base) var(--ease) var(--reveal-delay, 0ms),
    transform var(--base) var(--ease) var(--reveal-delay, 0ms);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* —— Home essay strip —— */
.home-essay-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: var(--hairline) solid var(--rule-light);
}

.home-essay {
  display: flex;
  flex-direction: column;
  gap: var(--stack-xs);
  padding: var(--row-pad-y) var(--space-5) var(--row-pad-y) 0;
  border-bottom: var(--hairline) solid var(--rule-light);
  text-decoration: none;
  color: inherit;
}

.home-essay + .home-essay {
  padding-left: var(--space-5);
  border-left: var(--hairline) solid var(--rule-light);
}

.home-essay:hover {
  color: inherit;
}

.home-essay .essay-kind {
  color: var(--fg-muted);
}

.home-essay .essay-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--step-1);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: var(--leading-snug);
}

.home-essay:hover .essay-title {
  color: var(--signal);
}

.home-essay .essay-summary {
  margin: 0;
  color: var(--fg-muted);
  font-size: var(--step-0);
  line-height: 1.45;
}

@keyframes art-breathe {
  from {
    opacity: 0;
    transform: scale(1.03);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes copy-in {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* —— Writing index —— */
.essay-list {
  display: grid;
  gap: 0;
  border-top: var(--hairline) solid var(--rule);
}

.is-paper .essay-list {
  border-top-color: var(--rule-light);
}

.essay-row {
  display: grid;
  grid-template-columns: minmax(10rem, 18rem) 1fr;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-items: start;
  padding: var(--row-pad-y) 0;
  border-bottom: var(--hairline) solid var(--rule);
  text-decoration: none;
  color: inherit;
}

.is-paper .essay-row {
  border-bottom-color: var(--rule-light);
}

.essay-row:hover {
  color: inherit;
}

.essay-plate {
  aspect-ratio: 8 / 5;
  background: var(--ink) center / cover no-repeat;
  filter: saturate(0.92);
  transition: transform var(--base) var(--ease), filter var(--base) var(--ease);
}

.essay-row:hover .essay-plate {
  transform: scale(1.015);
  filter: saturate(1);
}

.essay-meta {
  display: flex;
  flex-direction: column;
  gap: var(--stack-xs);
  padding-top: var(--space-1);
}

.essay-kind {
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-on-void);
}

.is-paper .essay-kind {
  color: var(--fg-muted);
}

.essay-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--step-2);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.12;
}

.essay-row:hover .essay-title {
  color: var(--signal);
}

.essay-summary {
  margin: 0;
  max-width: 48ch;
  color: var(--muted-on-void);
  font-size: var(--step-0);
  line-height: 1.45;
}

.is-paper .essay-summary {
  color: var(--fg-muted);
}

/* —— Essay article —— */
.essay-hero {
  position: relative;
  min-height: clamp(65vh, 75vh, 88vh);
  margin: 0 0 var(--section-sm);
  color: var(--fg-on-void);
  overflow: clip;
}

.essay-hero-stage {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--void);
}

.essay-hero-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(
      130% 95% at 8% 92%,
      rgba(10, 10, 11, 0.78) 0%,
      rgba(10, 10, 11, 0.42) 38%,
      transparent 68%
    ),
    linear-gradient(
      180deg,
      rgba(10, 10, 11, 0.2) 0%,
      transparent 34%,
      transparent 58%,
      rgba(10, 10, 11, 0.22) 100%
    );
}

.essay-hero-art {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  background-color: var(--void);
  animation: art-breathe var(--slow) var(--ease) both;
}

.essay-hero-copy {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: clamp(65vh, 75vh, 88vh);
  width: min(100% - (var(--gutter) * 2), var(--measure));
  margin-inline: auto;
  padding: calc(var(--nav-h) + var(--space-6)) var(--gutter) var(--space-10);
  animation: copy-in calc(var(--slow) + 0.15s) var(--ease) both;
}

.essay-hero-copy .essay-kind {
  color: var(--fg-on-art);
}

.essay-hero-copy h1 {
  margin: var(--stack-2xs) 0 var(--stack-xs);
  font-family: var(--font-serif);
  font-size: var(--step-3);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: var(--leading-tight);
  color: var(--fg-on-void);
  text-wrap: balance;
}

.essay-hero-copy .essay-lede {
  margin: 0;
  max-width: 42ch;
  color: var(--fg-on-art);
  font-family: var(--font-sans);
  font-size: var(--step-1);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.4;
}

.essay-body {
  width: min(100% - (var(--gutter) * 2), var(--measure));
  margin: 0 auto var(--section-md);
}

.prose {
  line-height: var(--leading-prose);
}

.prose p {
  margin: 0 0 1.15em;
  letter-spacing: -0.005em;
}

.prose h2 {
  margin: 2.25em 0 0.7em;
  font-family: var(--font-serif);
  font-size: var(--step-1);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: var(--leading-snug);
}

.prose a {
  color: var(--signal);
}

.prose a:hover {
  color: var(--signal-hover);
}

.essay-end {
  margin-top: var(--stack-2xl);
  padding-top: var(--stack-lg);
  border-top: var(--hairline) solid var(--rule-light);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-4);
  align-items: center;
  justify-content: space-between;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-tag);
}

.tag-cipher {
  color: var(--tag-cipher);
  background: var(--tag-cipher-wash);
}

.tag-sumosign {
  color: var(--signal);
  background: var(--tag-sumosign-wash);
}

.tag-frontier {
  color: var(--tag-frontier);
  background: var(--tag-frontier-wash);
}

.tag-techops {
  color: var(--tag-techops);
  background: var(--tag-techops-wash);
}

.ai-facts-link {
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--fg-muted);
}

.ai-facts-link:hover {
  color: var(--signal);
}

/* —— Feature / principle grids —— */
.band--ink .page-kicker,
.band--ink .page-standfirst,
.band--ink .pillar-body,
.band--ink .principle-body,
.band--ink .work-role,
.band--ink .work-blurb {
  color: var(--muted-on-void);
}

.band--ink .home-work-list,
.band--ink .home-work-row {
  border-color: var(--rule);
}

.band--ink .work-name {
  color: var(--fg-on-void);
}

.band--ink .home-work-arrow {
  color: var(--muted-on-void);
}

.band--ink .page-title,
.band--ink .pillar-title,
.band--ink .principle-title {
  color: var(--fg-on-void);
}

.band--ink .text-link {
  color: var(--fg-on-void);
}

.band--ink .index-num {
  color: var(--signal);
}

.index-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  margin-bottom: var(--stack-xs);
}

.feature-grid {
  border-top: var(--hairline) dashed var(--sand-deep);
  border-bottom: var(--hairline) dashed var(--sand-deep);
}

.feature-row {
  display: grid;
  grid-template-columns: minmax(12rem, 0.95fr) 1.35fr;
  gap: 0;
  border-bottom: var(--hairline) dashed var(--sand-deep);
}

.feature-row:last-child {
  border-bottom: 0;
}

.feature-lead,
.feature-copy {
  padding: var(--section-sm) clamp(1.25rem, 3vw, 2.5rem);
}

.feature-lead {
  border-right: var(--hairline) dashed var(--sand-deep);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--stack-md);
}

.feature-icon {
  width: 2rem;
  height: 2rem;
  color: var(--fg);
  flex-shrink: 0;
}

.feature-icon svg {
  display: block;
  width: 100%;
  height: 100%;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1.35rem, 1.1rem + 1.1vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--fg);
  max-width: 12ch;
}

.feature-thesis {
  margin: 0 0 var(--stack-xs);
  font-family: var(--font-sans);
  font-size: clamp(1.15rem, 1rem + 0.7vw, 1.45rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: var(--leading-snug);
  color: var(--fg);
}

.feature-body {
  margin: 0;
  max-width: 42ch;
  color: var(--fg-muted);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: var(--leading-body);
}

.feature-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5) var(--space-7);
  padding: var(--section-sm) clamp(1.25rem, 3vw, 2.5rem);
  border-top: var(--hairline) dashed var(--sand-deep);
}

.feature-cta-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.feature-cta-sub {
  margin: var(--stack-2xs) 0 0;
  color: var(--fg-muted);
  font-size: var(--step-0);
}

.btn-ink {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  background: var(--ink);
  color: var(--fg-on-void);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-tag);
  transition: background var(--fast) var(--ease-ui);
}

.btn-ink:hover {
  background: var(--signal);
  color: var(--fg-on-void);
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: var(--hairline) solid var(--rule-light);
}

.band--ink .pillar-grid {
  border-top-color: var(--rule);
}

.pillar {
  padding: var(--row-pad-y) var(--space-6) 0 0;
}

.pillar + .pillar {
  padding-left: var(--space-6);
  border-left: var(--hairline) solid var(--rule-light);
}

.band--ink .pillar + .pillar {
  border-left-color: var(--rule);
}

.pillar-title {
  margin: 0 0 var(--stack-xs);
  font-family: var(--font-serif);
  font-size: var(--step-1);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.pillar-body {
  margin: 0;
  color: var(--fg-muted);
  font-size: var(--step-0);
  line-height: 1.45;
  max-width: 32ch;
}

.principle-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: var(--hairline) dashed var(--sand-deep);
  border-bottom: var(--hairline) dashed var(--sand-deep);
}

.principle {
  display: grid;
  grid-template-columns: minmax(12rem, 0.95fr) 1.35fr;
  gap: 0;
  padding: 0;
  border-bottom: var(--hairline) dashed var(--sand-deep);
}

.principle:last-child {
  border-bottom: 0;
}

.principle-lead,
.principle-copy {
  padding: var(--section-sm) clamp(1.25rem, 3vw, 2.5rem);
}

.principle-lead {
  border-right: var(--hairline) dashed var(--sand-deep);
  display: flex;
  flex-direction: column;
  gap: var(--stack-sm);
  align-items: flex-start;
}

.principle-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1.25rem, 1.05rem + 0.9vw, 1.65rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 14ch;
}

.principle-body {
  margin: 0;
  color: var(--fg-muted);
  font-size: var(--step-0);
  line-height: var(--leading-body);
  max-width: 42ch;
}

.home-work-list {
  display: grid;
  gap: 0;
  border-top: var(--hairline) solid var(--rule-light);
}

.home-work-row {
  display: grid;
  grid-template-columns: minmax(9rem, 13rem) 6.5rem 1fr auto;
  gap: var(--space-4) var(--space-5);
  align-items: baseline;
  padding: var(--row-pad-y) 0;
  border-bottom: var(--hairline) solid var(--rule-light);
  text-decoration: none;
  color: inherit;
}

.home-work-row:hover {
  color: inherit;
}

.home-work-row:hover .work-name {
  color: var(--signal);
}

.home-work-arrow {
  color: var(--fg-faint);
  font-size: var(--step--1);
}

.track-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--hairline) solid var(--rule-light);
}

.track-list li {
  display: grid;
  grid-template-columns: 4.5rem minmax(8rem, 14rem) 1fr;
  gap: var(--space-4) var(--space-5);
  padding: var(--row-pad-y) 0;
  border-bottom: var(--hairline) solid var(--rule-light);
}

.track-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--fg-muted);
  padding-top: 0.15rem;
}

.track-co {
  font-weight: 500;
  letter-spacing: -0.015em;
}

.track-role {
  color: var(--fg-muted);
}

.cred-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: 0;
}

.cred-chip {
  display: inline-flex;
  padding: 0.35rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-muted);
  background: var(--sand);
  border-radius: var(--radius-tag);
}

.band--sand .cred-chip {
  background: var(--paper);
}

/* —— Rich footer —— */
.site-footer-rich {
  background: var(--ink);
  color: var(--muted-on-void);
  border-top: 0;
  padding: var(--section-sm) var(--gutter) var(--space-6);
  display: block;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--space-7) var(--space-6);
  width: min(100%, var(--page-max));
  margin: 0 auto var(--stack-xl);
}

.footer-brand-blurb {
  margin: var(--stack-xs) 0 0;
  max-width: 28ch;
  font-size: var(--step--1);
  line-height: 1.45;
  color: var(--muted-on-void);
}

.footer-col h4 {
  margin: 0 0 var(--stack-xs);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-on-void);
}

.footer-col a {
  display: block;
  margin-bottom: var(--stack-xs);
  font-size: var(--step-0);
  font-weight: 400;
  letter-spacing: -0.01em;
  text-decoration: none;
  text-transform: none;
  color: var(--muted-on-void);
}

.footer-col a:hover {
  color: var(--signal);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3) var(--space-6);
  width: min(100%, var(--page-max));
  margin: 0 auto;
  padding-top: var(--stack-md);
  border-top: var(--hairline) solid var(--rule);
  font-size: var(--step--1);
  font-weight: 500;
}

.footer-bottom a {
  text-decoration: none;
  color: inherit;
}

.footer-bottom a:hover {
  color: var(--signal);
}

.footer-bottom .tiny {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-right: var(--space-4);
  text-transform: none;
  letter-spacing: 0.01em;
}

/* —— Work —— */
.work-list {
  border-top: var(--hairline) solid var(--rule-light);
}

.work-row {
  display: grid;
  grid-template-columns: minmax(10rem, 14rem) 7rem 1fr;
  gap: var(--space-4) var(--space-6);
  padding: var(--row-pad-y) 0;
  border-bottom: var(--hairline) solid var(--rule-light);
  text-decoration: none;
  color: inherit;
}

.work-row:hover {
  color: inherit;
}

.work-name {
  font-weight: 500;
  letter-spacing: -0.015em;
}

.work-row:hover .work-name {
  color: var(--signal);
}

.work-role {
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
  padding-top: 0.15rem;
}

.work-blurb {
  margin: 0;
  color: var(--fg-muted);
  line-height: 1.45;
}

/* —— About / facts —— */
.bio p {
  margin: 0 0 1.15em;
  max-width: var(--measure);
  line-height: var(--leading-prose);
}

.bio .disambiguation {
  color: var(--fg-muted);
  font-size: var(--step--1);
  letter-spacing: 0.02em;
}

.pointer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--hairline) solid var(--rule-light);
}

.pointer-list li {
  border-bottom: var(--hairline) solid var(--rule-light);
}

.pointer-list a {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--row-pad-y) 0;
  text-decoration: none;
  font-size: var(--step-0);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.facts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--step-0);
}

.facts-table th,
.facts-table td {
  padding: var(--row-pad-y) 0;
  border-bottom: var(--hairline) solid var(--rule-light);
  text-align: left;
  vertical-align: top;
  line-height: 1.45;
}

.facts-table th {
  width: 11rem;
  padding-right: var(--space-6);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.facts-table ul {
  margin: 0;
  padding-left: 1.1rem;
}

.facts-note {
  margin-top: var(--stack-xl);
  color: var(--fg-muted);
  font-size: var(--step--1);
  line-height: 1.45;
}

/* —— Mobile —— */
@media (max-width: 820px) {
  .nav-toggle {
    display: block;
  }

  .nav-facets {
    position: fixed;
    inset: var(--nav-h) 0 auto;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-2) var(--gutter) var(--space-4);
    background: color-mix(in srgb, var(--paper) 96%, transparent);
    backdrop-filter: blur(12px);
    border-bottom: var(--hairline) solid var(--rule-light);
  }

  body.is-void .nav-facets,
  body.is-landing:not(.is-scrolled) .nav-facets,
  body.is-essay:not(.is-scrolled) .nav-facets {
    background: color-mix(in srgb, var(--void) 94%, transparent);
    border-bottom-color: var(--rule);
  }

  body.is-landing.is-scrolled .nav-facets,
  body.is-essay.is-scrolled .nav-facets {
    background: color-mix(in srgb, var(--paper) 96%, transparent);
    border-bottom-color: var(--rule-light);
  }

  .nav-facets.is-open {
    display: flex;
  }

  .nav-facets li {
    width: 100%;
  }

  .nav-facets a {
    display: block;
    width: 100%;
    padding: var(--space-4) 0;
    border-bottom: var(--hairline) solid var(--rule-light);
  }

  body.is-void .nav-facets a,
  body.is-landing:not(.is-scrolled) .nav-facets a,
  body.is-essay:not(.is-scrolled) .nav-facets a {
    border-bottom-color: var(--rule);
  }

  .nav-facets a[aria-current="page"]::after {
    display: none;
  }

  .nav-facets a[aria-current="page"] {
    color: var(--signal);
  }

  body.is-void .nav-facets a[aria-current="page"],
  body.is-landing:not(.is-scrolled) .nav-facets a[aria-current="page"],
  body.is-essay:not(.is-scrolled) .nav-facets a[aria-current="page"] {
    color: var(--fg-on-void);
  }

  .essay-row,
  .work-row {
    grid-template-columns: 1fr;
  }

  .essay-plate {
    max-width: 22rem;
  }

  .home-essay-list {
    grid-template-columns: 1fr;
  }

  .home-essay,
  .home-essay + .home-essay {
    padding: var(--row-pad-y) 0;
    border-left: 0;
  }

  .landing-corners {
    flex-direction: column;
    align-items: flex-start;
  }

  .pillar-grid {
    grid-template-columns: 1fr;
  }

  .pillar,
  .pillar + .pillar {
    padding: var(--row-pad-y) 0;
    border-left: 0;
  }

  .feature-row,
  .principle {
    grid-template-columns: 1fr;
  }

  .feature-lead,
  .principle-lead {
    border-right: 0;
    border-bottom: var(--hairline) dashed var(--sand-deep);
    padding-bottom: var(--stack-md);
  }

  .feature-title,
  .principle-title {
    max-width: none;
  }

  .feature-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .home-work-row,
  .track-list li {
    grid-template-columns: 1fr;
    gap: var(--stack-2xs);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .site-footer:not(.site-footer-rich) {
    flex-direction: column;
    align-items: flex-start;
  }

  .landing-copy {
    padding-bottom: 6.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}