@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("../assets/fonts/plus-jakarta-300.woff2") format("woff2");
  font-style: normal;
  font-weight: var(--uk-font-weight-light);
  font-display: swap;
}

@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("../assets/fonts/plus-jakarta-400.woff2") format("woff2");
  font-style: normal;
  font-weight: var(--uk-font-weight-regular);
  font-display: swap;
}

@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("../assets/fonts/plus-jakarta-500.woff2") format("woff2");
  font-style: normal;
  font-weight: var(--uk-font-weight-medium);
  font-display: swap;
}

@font-face {
  font-family: "Plus Jakarta Sans";
  src: url("../assets/fonts/plus-jakarta-600.woff2") format("woff2");
  font-style: normal;
  font-weight: var(--uk-font-weight-semibold);
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("../assets/fonts/jetbrains-mono-400.woff2") format("woff2");
  font-style: normal;
  font-weight: var(--uk-font-weight-regular);
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("../assets/fonts/jetbrains-mono-500.woff2") format("woff2");
  font-style: normal;
  font-weight: var(--uk-font-weight-medium);
  font-display: swap;
}

/* ============================================================================
 * unikode.ai homepage: premium minimal placeholder.
 * Light surface, charcoal ink, neutral gray hairlines. Monochrome by design;
 * the single blue accent is reserved for the focus ring only. Hero copy animation
 * is pure CSS; the hero graph is a 3D wireframe driven by site.js. Both collapse
 * under prefers-reduced-motion.
 * Tokens come from @unikode/design (vendor/unikode-design/*.css).
 * The long-form research article surface below this block is untouched.
 * ========================================================================== */

:root {
  color-scheme: light;
  --home-shell: 1200px;
  --home-edge: clamp(20px, 5vw, 64px);
  --home-ink: var(--uk-color-fg-primary);
  --home-muted: var(--uk-color-fg-secondary);
  --home-faint: var(--uk-color-fg-secondary);
  --home-line: var(--uk-color-border-subtle);
  --home-line-strong: var(--uk-color-border-default);
  --home-surface: var(--uk-color-bg-surface);
  --home-surface-muted: var(--uk-color-bg-surface-muted);
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: var(--article-scroll-offset, 96px);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--uk-color-bg-page);
  color: var(--home-ink);
  font-family: var(--uk-font-family-sans);
  font-size: var(--uk-type-body-large, 16px);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

:focus-visible {
  outline: var(--uk-a11y-focus-width) solid var(--uk-color-focus-ring);
  outline-offset: var(--uk-a11y-focus-offset);
  border-radius: var(--uk-radius-control);
}

.skip-link {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: var(--uk-z-tooltip);
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 8px 14px;
  background: var(--home-surface);
  color: var(--home-ink);
  border: 1px solid var(--home-ink);
  border-radius: var(--uk-radius-control);
  font-weight: var(--uk-font-weight-medium);
  text-decoration: none;
  transform: translateY(-120px);
}

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

/* ─── Shared brand lockup (homepage + article reuse .brand) ─────────────── */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  text-decoration: none;
  color: var(--home-ink);
}

.brand img {
  display: block;
  width: 30px;
  height: 30px;
}

.brand span {
  font-size: 17px;
  font-weight: var(--uk-font-weight-semibold);
  letter-spacing: -0.01em;
}

/* ============================================================================
 * Homepage surface (scoped under body.home)
 * ========================================================================== */
.home {
  display: flex;
  flex-direction: column;
  min-height: 100svh;
}

.home main {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* ─── Header ────────────────────────────────────────────────────────────── */
.home .site-head {
  position: sticky;
  top: 0;
  z-index: var(--uk-z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px var(--home-edge);
  background: var(--uk-color-bg-page);
  background: color-mix(in srgb, var(--uk-color-bg-page) 88%, transparent);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--home-line-strong);
}

.home .head-cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--home-muted);
  border-radius: var(--uk-radius-control);
  font-size: 13px;
  font-weight: var(--uk-font-weight-medium);
  color: var(--home-ink);
  text-decoration: none;
  white-space: nowrap;
  transition:
    background var(--uk-duration-short) var(--uk-easing-standard),
    border-color var(--uk-duration-short) var(--uk-easing-standard);
}

.home .head-cta:hover {
  background: var(--home-surface-muted);
  border-color: var(--home-ink);
}

.home .head-cta:active {
  transform: scale(var(--uk-motion-scale-press));
}

/* ─── Hero ──────────────────────────────────────────────────────────────── */
.home .hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(40px, 6vw, 72px);
  align-items: center;
  width: 100%;
  max-width: var(--home-shell);
  margin: 0 auto;
  padding: clamp(44px, 8vh, 96px) var(--home-edge) clamp(28px, 4vh, 56px);
}

@media (min-width: 1024px) {
  .home .hero {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  }
}

.home .hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
  max-width: 36rem;
}

.home .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 -6px;
  font-family: var(--uk-font-family-mono);
  font-size: 11px;
  font-weight: var(--uk-font-weight-medium);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--home-faint);
}

.home .hero-eyebrow__dot {
  width: 7px;
  height: 7px;
  border-radius: var(--uk-radius-circular);
  background: var(--home-ink);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--home-ink) 12%, transparent);
  animation: eyebrow-pulse 3.6s var(--uk-easing-standard) infinite;
}

.home .hero-title {
  margin: 0;
  font-size: clamp(40px, 6.4vw, 72px);
  line-height: 1.04;
  font-weight: var(--uk-font-weight-light);
  letter-spacing: -0.025em;
  color: var(--home-ink);
  text-wrap: balance;
}

.home .hero-lead {
  margin: 0;
  max-width: 34rem;
  font-size: clamp(17px, 1.5vw, 19px);
  line-height: 1.62;
  font-weight: var(--uk-font-weight-regular);
  color: var(--home-muted);
}

.home .hero-model {
  margin: 4px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--home-line-strong);
  font-size: 15px;
  font-weight: var(--uk-font-weight-medium);
  letter-spacing: 0.005em;
  color: var(--home-ink);
}

.home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: 8px;
}

.home .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--uk-radius-control);
  font-size: 14px;
  font-weight: var(--uk-font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition:
    background var(--uk-duration-short) var(--uk-easing-standard),
    border-color var(--uk-duration-short) var(--uk-easing-standard),
    color var(--uk-duration-short) var(--uk-easing-standard),
    transform var(--uk-duration-short) var(--uk-easing-standard);
}

.home .btn--primary {
  background: var(--uk-color-charcoal-900);
  color: var(--uk-color-bone);
  border-color: var(--uk-color-charcoal-900);
}

.home .btn--primary:hover {
  background: var(--uk-color-charcoal-800);
  transform: translateY(-1px);
}

.home .btn--primary:active {
  transform: translateY(0) scale(var(--uk-motion-scale-press));
}

.home .hero-textlink {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 0 4px;
  font-size: 14px;
  font-weight: var(--uk-font-weight-medium);
  color: var(--home-muted);
  text-decoration: none;
  transition: color var(--uk-duration-short) var(--uk-easing-standard);
}

.home .hero-textlink::after {
  content: "\2192";
  transition: transform var(--uk-duration-short) var(--uk-easing-standard);
}

.home .hero-textlink:hover,
.home .hero-textlink:focus-visible {
  color: var(--home-ink);
}

.home .hero-textlink:hover::after,
.home .hero-textlink:focus-visible::after {
  transform: translateX(3px);
}

.home .hero-textlink:active {
  color: var(--home-ink);
}

/* ─── Knowledge-graph visual ────────────────────────────────────────────── */
.home .hero-visual {
  display: flex;
  justify-content: center;
}

.home .graph {
  width: 100%;
  max-width: 540px;
  aspect-ratio: 1 / 1;
}

@supports not (aspect-ratio: 1 / 1) {
  .home .graph {
    min-height: 360px;
  }
}

.home .graph__svg {
  display: block;
  width: 100%;
  height: 100%;
  color: var(--home-ink);
  overflow: visible;
}

/* 3D wireframe graph: site.js owns every node position, radius and opacity
   (depth shading) and every edge's endpoints, so each edge always runs cleanly
   between two real nodes. Flat ink only, no gradients; CSS sets just the base
   paint, the script sets all geometry and per-element opacity each frame. */
.home .graph__edge {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
}

.home .graph__node {
  fill: var(--home-ink);
}

/* ─── Footer ────────────────────────────────────────────────────────────── */
.home .site-foot {
  width: 100%;
  max-width: var(--home-shell);
  margin: 0 auto;
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 32px;
  padding: 40px var(--home-edge) 48px;
}

.home .brand--foot span {
  font-size: 15px;
}

.home .brand--foot img {
  width: 22px;
  height: 22px;
}

.home .foot-legal {
  flex-basis: 100%;
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--home-line-strong);
  font-family: var(--uk-font-family-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--home-faint);
}

/* ─── Entrance motion for hero copy ─────────────────────────────────────── */
.home .hero-eyebrow,
.home .hero-title,
.home .hero-lead,
.home .hero-model,
.home .hero-actions {
  animation: hero-rise var(--uk-duration-long) var(--uk-easing-emphasized) backwards;
}

.home .hero-title {
  animation-delay: 80ms;
}
.home .hero-lead {
  animation-delay: 180ms;
}
.home .hero-model {
  animation-delay: 260ms;
}
.home .hero-actions {
  animation-delay: 340ms;
}

/* ─── Keyframes ─────────────────────────────────────────────────────────── */
@keyframes eyebrow-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--home-ink) 12%, transparent);
  }
  50% {
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--home-ink) 4%, transparent);
  }
}

@keyframes hero-rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ─── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 1023px) {
  .home .hero {
    grid-template-columns: 1fr;
  }

  .home .hero-copy {
    max-width: 40rem;
  }

  .home .graph {
    max-width: 440px;
    opacity: 0.92;
  }
}

@media (max-width: 600px) {
  .home .head-cta {
    display: none;
  }

  .home .hero {
    padding-top: 40px;
  }

  .home .graph {
    max-width: 300px;
    opacity: 0.92;
  }
}

/* ─── Reduced motion: settle to final state, no looping ─────────────────── */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .home .hero-eyebrow__dot,
  .home .hero-eyebrow,
  .home .hero-title,
  .home .hero-lead,
  .home .hero-model,
  .home .hero-actions {
    animation: none !important;
  }

  /* The graph engine itself renders a single static, fully assembled frame
     under reduced motion (no rotation, no entrance). */
}
/* ─── Request-access form page ──────────────────────────────────────────── */
.request main {
  display: flex;
  justify-content: center;
}

.request-shell {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: clamp(40px, 7vh, 80px) var(--home-edge) clamp(40px, 6vh, 72px);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.request-intro {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.request-title {
  margin: 0;
  font-size: clamp(30px, 4.5vw, 42px);
  line-height: 1.08;
  font-weight: var(--uk-font-weight-light);
  letter-spacing: -0.02em;
  color: var(--home-ink);
}

.request-lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--home-muted);
}

.request-card {
  background: var(--home-surface);
  border: 1px solid var(--home-line);
  border-radius: var(--uk-radius-card);
  box-shadow: var(--uk-elevation-1);
}

.request-card__body {
  padding: clamp(20px, 4vw, 32px);
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 7px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 600px) {
  .field-row {
    grid-template-columns: 1fr 1fr;
  }
}

.field__label {
  font-size: 12px;
  font-weight: var(--uk-font-weight-medium);
  letter-spacing: 0.01em;
  color: var(--home-ink);
}

.request input,
.request textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid var(--home-line-strong);
  border-radius: var(--uk-radius-control);
  background: var(--home-surface);
  color: var(--home-ink);
  font: var(--uk-font-weight-regular) 15px/1.5 var(--uk-font-family-sans);
  transition:
    border-color var(--uk-duration-short) var(--uk-easing-standard),
    box-shadow var(--uk-duration-short) var(--uk-easing-standard);
}

.request textarea {
  min-height: 104px;
  resize: vertical;
}

.request input::placeholder,
.request textarea::placeholder {
  color: var(--home-faint);
}

.request input:hover,
.request textarea:hover {
  border-color: var(--home-muted);
}

.request input:focus,
.request textarea:focus {
  outline: none;
  border-color: var(--uk-color-focus-ring);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--uk-color-focus-ring) 30%, transparent);
}

/* Post-interaction validity only: :user-invalid never fires on first paint,
   so required fields are not pre-reddened before the visitor has typed. */
.request input:user-invalid,
.request textarea:user-invalid {
  border-color: var(--uk-color-error);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--uk-color-error) 22%, transparent);
}

.request-submit {
  width: 100%;
  margin-top: 4px;
}

.request-submit:disabled {
  opacity: var(--uk-opacity-60);
  cursor: not-allowed;
}

.request-fineprint {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--home-faint);
}

.request-error {
  margin: 0;
  padding: 10px 14px;
  border: 1px solid var(--uk-color-error);
  border-radius: var(--uk-radius-control);
  background: color-mix(in srgb, var(--uk-color-error) 8%, var(--home-surface));
  color: var(--uk-color-error);
  font-size: 13px;
  line-height: 1.5;
}

.uk-hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ─── Success modal ─────────────────────────────────────────────────────── */
body.uk-modal-open {
  overflow: hidden;
}

.uk-modal {
  position: fixed;
  inset: 0;
  z-index: var(--uk-z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.uk-modal[hidden] {
  display: none;
}

.uk-modal__backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--uk-color-charcoal-900) 38%, transparent);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.uk-modal__panel {
  position: relative;
  width: 100%;
  max-width: 400px;
  padding: 36px 32px 32px;
  background: var(--home-surface);
  border: 1px solid var(--home-line);
  border-radius: var(--uk-radius-card);
  box-shadow: var(--uk-elevation-3);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  animation: modal-in var(--uk-duration-medium) var(--uk-easing-emphasized);
}

.uk-modal__mark {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--uk-color-charcoal-900);
  color: var(--uk-color-bone);
}

.uk-modal__mark svg {
  width: 24px;
  height: 24px;
}

.uk-modal__title {
  margin: 4px 0 0;
  font-size: 22px;
  font-weight: var(--uk-font-weight-medium);
  letter-spacing: -0.01em;
  color: var(--home-ink);
}

.uk-modal__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--home-muted);
}

.uk-modal__done {
  margin-top: 12px;
  min-width: 140px;
}

@keyframes modal-in {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .uk-modal__panel {
    animation: none;
  }
}

/* Long-form research article surface. */
.article-page {
  --article-bg: var(--md3-color-background);
  --article-surface: var(--md3-color-surface);
  --article-surface-muted: var(--md3-color-surface-container-low);
  --article-ink: var(--md3-color-on-surface);
  --article-muted: var(--md3-color-on-surface-variant);
  --article-line: var(--md3-color-outline);
  --article-line-soft: var(--md3-color-outline-variant);
  --article-accent: var(--md3-color-secondary);
  /* AA-safe accent for text. The raw accent (#007ACC) is ~4.3:1 on the page
     surface — below WCAG AA (4.5:1) for normal text. Deepen it toward the
     governed deep blue so accent text (kicker, source tags, citation states)
     clears AA, while --article-accent stays for fills, borders, and focus. */
  --article-accent-text: color-mix(in srgb, var(--article-accent) 86%, var(--uk-color-blue-dark));
  --article-radius: var(--uk-radius-control);
  --article-edge: clamp(var(--uk-space-16), 4vw, var(--uk-space-40));
  --article-panel-inset: clamp(var(--uk-space-16), 2.6vw, var(--uk-space-24));
  --article-row-inset-x: clamp(var(--uk-space-12), 2vw, var(--uk-space-20));
  --article-row-inset-y: var(--uk-space-16);
  --article-readable: var(--uk-a11y-readable-measure);
  --article-indent-section: clamp(var(--uk-space-12), 2.2vw, var(--uk-space-32));
  --article-indent-nested: clamp(var(--uk-space-8), 1.4vw, var(--uk-space-24));
  --article-indent-tight: clamp(var(--uk-space-6), 1vw, var(--uk-space-16));
  --article-motion-reveal: var(--md3-motion-duration-medium4);
  --article-motion-data: var(--md3-motion-duration-medium3);
  --article-motion-state: var(--md3-motion-duration-short2);
  --article-motion-line: var(--md3-motion-duration-medium2);
  --article-motion-stack: var(--md3-motion-duration-medium3);
  --article-focus-rise: var(--uk-space-12);
  --article-depth-y: var(--uk-space-0);
  --article-depth-z: var(--uk-space-0);
  --article-depth-scale: 1;
  --article-depth-tilt: 0deg;
  --article-surface-shadow: 0 var(--uk-space-4) var(--uk-space-16)
    color-mix(in srgb, var(--article-ink) 4%, transparent);
  background: var(--article-bg);
  color: var(--article-ink);
}

.article-page [id] {
  scroll-margin-top: var(--article-scroll-offset);
}

.article-site-head {
  align-items: center;
  background: color-mix(in srgb, var(--article-bg) 88%, transparent);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: var(--uk-space-2) solid var(--article-line-soft);
  color: var(--article-ink);
  display: flex;
  justify-content: space-between;
  min-height: calc(var(--md3-touch-target-min) + var(--uk-space-8));
  padding:
    max(var(--uk-space-8), env(safe-area-inset-top))
    max(var(--article-edge), env(safe-area-inset-right))
    var(--uk-space-8)
    max(var(--article-edge), env(safe-area-inset-left));
  position: sticky;
  top: var(--uk-space-0);
  z-index: 20;
}

.article-progress {
  bottom: calc(var(--uk-space-2) * -1);
  height: var(--uk-space-2);
  left: var(--uk-space-0);
  overflow: hidden;
  position: absolute;
  right: var(--uk-space-0);
}

.article-progress span {
  background: var(--article-ink);
  display: block;
  height: 100%;
  transform: scaleX(var(--article-progress, 0));
  transform-origin: left center;
  will-change: transform;
  width: 100%;
}

.article-shell {
  margin-inline: auto;
  max-width: var(--uk-container-max-wide);
  width: 100%;
}

.article-hero {
  display: grid;
  gap: var(--uk-space-48);
  grid-template-columns: minmax(var(--uk-space-0), 760px) minmax(300px, 380px);
  justify-content: center;
  padding:
    calc(var(--uk-space-64) + var(--uk-space-16))
    var(--article-edge)
    var(--uk-space-64);
}

.article-hero__copy {
  max-width: 760px;
}

.article-kicker,
.section-label {
  color: var(--article-accent-text);
  font-size: var(--md3-type-label-large-font-size);
  font-weight: var(--uk-font-weight-semibold);
  letter-spacing: var(--uk-letter-spacing-normal);
  line-height: var(--md3-type-label-large-line-height);
  margin-bottom: var(--uk-space-16);
}

.article-page h1 {
  color: var(--article-ink);
  font-size: var(--md3-type-display-large-font-size);
  font-weight: var(--uk-font-weight-light);
  letter-spacing: var(--uk-letter-spacing-normal);
  line-height: var(--uk-line-height-tight);
  margin-bottom: var(--uk-space-24);
  max-width: 16ch;
}

.article-deck {
  color: var(--article-muted);
  font-size: var(--md3-type-title-large-font-size);
  line-height: var(--md3-type-title-large-line-height);
  margin-bottom: var(--uk-space-24);
  max-width: 690px;
}

.article-meta {
  color: var(--article-muted);
  display: flex;
  flex-wrap: wrap;
  font-size: var(--md3-type-label-large-font-size);
  gap: var(--uk-space-8) var(--uk-space-16);
}

.article-meta span {
  align-items: center;
  display: inline-flex;
  gap: var(--uk-space-8);
}

.article-meta span:not(:last-child)::after {
  background: var(--article-line);
  content: "";
  display: inline-block;
  height: var(--uk-space-4);
  width: var(--uk-space-4);
}

.citation:hover,
.citation:focus-visible,
.source-card a:hover,
.source-card a:focus-visible {
  color: var(--article-accent-text);
  text-decoration-color: var(--article-accent-text);
}

.evidence-table {
  align-self: end;
  background: var(--article-surface);
  border: var(--uk-space-2) solid var(--article-line-soft);
  border-top-color: var(--article-ink);
  border-radius: var(--article-radius);
  box-shadow: var(--article-surface-shadow);
  display: grid;
  margin: var(--uk-space-0);
  overflow: clip;
  padding: var(--uk-space-20);
}

.evidence-table .section-label {
  color: var(--article-ink);
  margin-bottom: var(--uk-space-8);
}

.evidence-row {
  align-items: baseline;
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  color: inherit;
  display: grid;
  gap: var(--uk-space-8) var(--uk-space-16);
  grid-template-columns: minmax(72px, 0.38fr) minmax(var(--uk-space-0), 1fr);
  min-height: var(--md3-touch-target-min);
  margin-inline: calc(var(--article-row-inset-x) * -1);
  padding: var(--article-row-inset-y) var(--article-row-inset-x);
  text-decoration: none;
  transition:
    background-color var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short3) var(--md3-motion-easing-standard);
}

.evidence-row__metric {
  color: var(--article-ink);
  font-family: var(--uk-font-family-mono);
  font-size: var(--md3-type-headline-medium-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-headline-medium-line-height);
  white-space: nowrap;
}

.evidence-row__claim {
  color: var(--article-muted);
  font-size: var(--md3-type-body-large-font-size);
  line-height: var(--md3-type-body-large-line-height);
}

.evidence-row__source {
  color: var(--article-accent-text);
  font-size: var(--md3-type-label-medium-font-size);
  font-weight: var(--uk-font-weight-semibold);
  grid-column: 2;
}

.article-layout {
  display: grid;
  justify-content: center;
  padding: var(--uk-space-16) var(--article-edge) var(--uk-space-80);
}

.article-content {
  display: grid;
  gap: var(--uk-space-64);
  max-width: min(760px, var(--article-readable));
  perspective: 1400px;
  perspective-origin: 50% 42vh;
  width: 100%;
}

/* On-this-page section nav. A collapsible "On this page" disclosure on
   compact/tablet, and an open sticky section rail on wide desktop — one
   orientation system per the long-form surface guide. */
.article-rail {
  border: var(--uk-space-2) solid var(--article-line-soft);
  border-radius: var(--article-radius);
  margin-bottom: var(--uk-space-32);
  max-width: min(760px, var(--article-readable));
  width: 100%;
}

.article-rail__title {
  align-items: center;
  color: var(--article-ink);
  cursor: pointer;
  display: flex;
  font-size: var(--md3-type-label-large-font-size);
  font-weight: var(--uk-font-weight-semibold);
  gap: var(--uk-space-12);
  justify-content: space-between;
  list-style: none;
  min-height: var(--md3-touch-target-min);
  padding: var(--uk-space-12) var(--uk-space-16);
}

.article-rail__title::-webkit-details-marker {
  display: none;
}

.article-rail__title::after {
  border-bottom: var(--uk-space-2) solid var(--article-muted);
  border-right: var(--uk-space-2) solid var(--article-muted);
  content: "";
  flex: none;
  height: var(--uk-space-8);
  transform: translateY(calc(var(--uk-space-2) * -1)) rotate(45deg);
  transition: transform var(--article-motion-state) var(--md3-motion-easing-standard);
  width: var(--uk-space-8);
}

.article-rail[open] > .article-rail__title::after {
  transform: translateY(var(--uk-space-2)) rotate(-135deg);
}

.article-rail__title:hover {
  color: var(--article-ink);
}

.article-rail__title:focus-visible {
  border-radius: var(--article-radius);
  outline: var(--uk-a11y-focus-width) solid var(--uk-color-focus-ring);
  outline-offset: calc(var(--uk-a11y-focus-offset) * -1);
}

.article-rail__list {
  border-block-start: var(--uk-space-2) solid var(--article-line-soft);
  display: none;
  flex-direction: column;
  list-style: none;
  margin: var(--uk-space-0);
  padding: var(--uk-space-4) var(--uk-space-16) var(--uk-space-12);
}

.article-rail[open] > .article-rail__list {
  display: flex;
}

.article-rail__link {
  align-items: center;
  color: var(--article-muted);
  display: flex;
  font-size: var(--md3-type-label-large-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-label-large-line-height);
  min-height: var(--md3-touch-target-min);
  padding: var(--uk-space-8) var(--uk-space-0);
  text-decoration: none;
  transition:
    color var(--article-motion-state) var(--md3-motion-easing-standard),
    border-color var(--article-motion-state) var(--md3-motion-easing-standard);
}

.article-rail__link:hover {
  color: var(--article-ink);
}

.article-rail__link[aria-current="true"] {
  color: var(--article-ink);
  font-weight: var(--uk-font-weight-semibold);
}

.article-rail__link:focus-visible {
  border-radius: var(--article-radius);
  outline: var(--uk-a11y-focus-width) solid var(--uk-color-focus-ring);
  outline-offset: var(--uk-a11y-focus-offset);
}

@media (min-width: 1280px) {
  .article-layout {
    column-gap: clamp(var(--uk-space-24), 2.4vw, var(--uk-space-40));
    grid-template-columns:
      clamp(150px, 13vw, 190px)
      min(760px, var(--article-readable))
      clamp(150px, 13vw, 190px);
  }

  .article-content {
    grid-column: 2;
  }

  /* Wide desktop: open sticky rail, no card chrome or toggle affordance. */
  .article-rail {
    align-self: start;
    border: 0;
    grid-column: 1;
    margin-bottom: var(--uk-space-0);
    max-height: calc(100vh - var(--article-scroll-offset, 96px) - var(--uk-space-48));
    max-width: none;
    overflow-y: auto;
    position: sticky;
    top: calc(var(--article-scroll-offset, 96px) + var(--uk-space-24));
  }

  .article-rail__title {
    color: var(--article-muted);
    cursor: default;
    font-size: var(--md3-type-label-medium-font-size);
    min-height: auto;
    padding: var(--uk-space-0) var(--uk-space-0) var(--uk-space-4) var(--uk-space-16);
  }

  .article-rail__title::after {
    display: none;
  }

  .article-rail__list {
    border-block-start: 0;
    border-inline-start: var(--uk-space-2) solid var(--article-line-soft);
    padding: var(--uk-space-0);
  }

  .article-rail__link {
    border-inline-start: var(--uk-space-2) solid transparent;
    margin-inline-start: calc(var(--uk-space-2) * -1);
    padding-inline-start: var(--uk-space-16);
  }

  .article-rail__link[aria-current="true"] {
    border-inline-start-color: var(--article-ink);
    font-weight: var(--uk-font-weight-medium);
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-rail__link,
  .article-rail__title::after {
    transition: none;
  }
}

.article-section {
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  padding-top: var(--uk-space-48);
  position: relative;
}

.article-section:first-child {
  border-top: 0;
  padding-top: var(--uk-space-0);
}

.article-page h2 {
  color: var(--article-ink);
  font-size: var(--md3-type-headline-large-font-size);
  font-weight: var(--uk-font-weight-light);
  letter-spacing: var(--uk-letter-spacing-normal);
  line-height: var(--md3-type-headline-large-line-height);
  margin-bottom: var(--uk-space-20);
  max-width: 22ch;
}

.article-page h3 {
  color: var(--article-ink);
  font-size: var(--md3-type-title-medium-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-title-medium-line-height);
  margin-bottom: var(--uk-space-8);
}

.article-content p,
.source-card p,
.task-row p,
.effect-ladder p,
.denominator-row p,
.principle-grid p,
.finding-list p {
  color: var(--article-muted);
  font-size: var(--md3-type-body-large-font-size);
  line-height: 1.7;
  margin-bottom: var(--uk-space-20);
}

.article-lede {
  color: var(--article-ink);
  font-size: var(--md3-type-title-large-font-size);
  line-height: 1.62;
}

.research-abstract {
  background: var(--article-surface);
  border-top: var(--uk-space-2) solid var(--article-ink);
  box-shadow: var(--article-surface-shadow);
  padding: var(--article-panel-inset) var(--article-panel-inset) calc(var(--article-panel-inset) - var(--uk-space-4));
  position: relative;
}

.finding-list {
  border-bottom: var(--uk-space-2) solid var(--article-line-soft);
  display: grid;
  margin: var(--uk-space-32) var(--uk-space-0);
}

.finding-list article {
  align-items: baseline;
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  display: grid;
  gap: var(--uk-space-16);
  grid-template-columns: 48px minmax(var(--uk-space-0), 1fr);
  min-height: var(--md3-touch-target-min);
  padding: var(--uk-space-16) var(--uk-space-0);
}

.finding-list span {
  color: var(--article-accent-text);
  font-family: var(--uk-font-family-mono);
  font-size: var(--md3-type-label-medium-font-size);
}

.finding-list p {
  color: var(--article-ink);
  font-size: var(--md3-type-title-medium-font-size);
  line-height: var(--md3-type-title-medium-line-height);
  margin-bottom: var(--uk-space-0);
}

.finding-list--strong {
  margin-top: var(--uk-space-40);
}

.insight-panel {
  background: var(--article-surface);
  border-left: var(--uk-space-4) solid var(--article-ink);
  box-shadow: var(--article-surface-shadow);
  margin: var(--uk-space-32) var(--uk-space-0) var(--uk-space-0);
  padding: var(--article-panel-inset) var(--article-panel-inset) var(--article-panel-inset) var(--uk-space-24);
}

.insight-panel p:last-child {
  color: var(--article-ink);
  margin-bottom: var(--uk-space-0);
}

.citation {
  align-items: center;
  color: var(--article-ink);
  display: inline-flex;
  font-size: var(--md3-type-label-large-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-label-large-line-height);
  margin-inline: var(--uk-space-2);
  min-height: var(--uk-space-24);
  padding-inline: var(--uk-space-2);
  text-decoration-color: var(--article-accent-text);
  text-underline-offset: var(--uk-space-4);
  transition:
    color var(--article-motion-state) var(--md3-motion-easing-standard),
    text-decoration-color var(--article-motion-state) var(--md3-motion-easing-standard);
}

.citation:active,
.source-card a:active {
  color: var(--article-accent-text);
}

.data-figure {
  background: var(--article-surface);
  border: var(--uk-space-2) solid var(--article-line-soft);
  border-top-color: var(--article-ink);
  border-radius: var(--article-radius);
  box-shadow: var(--article-surface-shadow);
  margin: var(--uk-space-32) var(--uk-space-0);
  overflow: clip;
  padding: var(--article-panel-inset);
}

.data-figure figcaption {
  display: grid;
  gap: var(--uk-space-8);
  margin-bottom: var(--uk-space-24);
}

.data-figure figcaption span,
.data-note {
  color: var(--article-muted);
  font-size: var(--md3-type-label-medium-font-size);
  line-height: var(--md3-type-label-medium-line-height);
}

.data-figure figcaption strong {
  color: var(--article-ink);
  font-size: var(--md3-type-title-large-font-size);
  font-weight: var(--uk-font-weight-light);
  line-height: var(--md3-type-title-large-line-height);
  max-width: 28ch;
}

.figure-takeaway {
  color: var(--article-muted);
  font-size: var(--md3-type-body-medium-font-size);
  line-height: var(--md3-type-body-medium-line-height);
  margin-bottom: var(--uk-space-0);
  max-width: 60ch;
}

.bar-chart {
  border-bottom: var(--uk-space-2) solid var(--article-line-soft);
  display: grid;
}

.bar-row {
  align-items: center;
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  color: inherit;
  display: grid;
  gap: var(--uk-space-12) var(--uk-space-16);
  grid-template-columns: minmax(190px, 0.9fr) minmax(160px, 1fr) minmax(64px, auto);
  min-height: calc(var(--md3-touch-target-min) + var(--uk-space-12));
  padding: var(--article-row-inset-y) var(--article-row-inset-x);
  text-decoration: none;
  transition:
    background-color var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short3) var(--md3-motion-easing-standard);
}

.bar-row:hover .bar-row__fill,
.bar-row:focus-visible .bar-row__fill {
  opacity: 1;
}

.bar-row__label {
  color: var(--article-ink);
  font-size: var(--md3-type-body-medium-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-body-medium-line-height);
}

.bar-row__track {
  background: var(--article-line-soft);
  border-radius: var(--article-radius);
  display: block;
  height: var(--uk-space-12);
  overflow: hidden;
  width: 100%;
}

.bar-row__fill {
  background: var(--article-ink);
  border-radius: inherit;
  display: block;
  height: 100%;
  opacity: var(--uk-opacity-85);
  transform-origin: left center;
  transition:
    opacity var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--article-motion-reveal) var(--md3-motion-easing-decelerate);
}

.bar-row__value {
  color: var(--article-ink);
  font-family: var(--uk-font-family-mono);
  font-size: var(--md3-type-title-medium-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-title-medium-line-height);
  text-align: right;
}

.bar-row--88 .bar-row__fill {
  width: 88%;
}

.bar-row--50 .bar-row__fill {
  width: 50%;
}

.bar-row--39 .bar-row__fill {
  width: 39%;
}

.bar-row--33 .bar-row__fill {
  width: 33%;
}

.bar-row--26 .bar-row__fill {
  width: 26%;
}

.bar-row--15 .bar-row__fill {
  width: 15%;
}

.bar-row--6 .bar-row__fill {
  width: 6%;
}

.denominator-ledger,
.task-ledger,
.effect-ladder,
.failure-ledger {
  background: var(--md3-color-surface-container-lowest);
  border-bottom: var(--uk-space-2) solid var(--article-line-soft);
  display: grid;
}

.denominator-row {
  align-items: start;
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  color: inherit;
  display: grid;
  gap: var(--uk-space-16);
  grid-template-columns: minmax(140px, 0.75fr) minmax(82px, 0.36fr) minmax(180px, 1.15fr);
  min-height: calc(var(--md3-touch-target-min) + var(--uk-space-8));
  padding: var(--article-row-inset-y) var(--article-row-inset-x);
  text-decoration: none;
  transition:
    background-color var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short3) var(--md3-motion-easing-standard);
}

.denominator-row--head {
  color: var(--article-muted);
  font-size: var(--md3-type-label-medium-font-size);
  font-weight: var(--uk-font-weight-semibold);
  min-height: var(--md3-touch-target-min);
  text-transform: none;
}

.denominator-row span {
  color: var(--article-muted);
  font-size: var(--md3-type-body-medium-font-size);
  line-height: var(--md3-type-body-medium-line-height);
}

.denominator-row strong {
  color: var(--article-ink);
  font-family: var(--uk-font-family-mono);
  font-size: var(--md3-type-title-large-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-title-large-line-height);
}

.variance-chart {
  border-bottom: var(--uk-space-2) solid var(--article-line-soft);
  display: grid;
}

.variance-row {
  align-items: center;
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  color: inherit;
  display: grid;
  gap: var(--uk-space-12) var(--uk-space-16);
  grid-template-columns: minmax(190px, 0.9fr) minmax(180px, 1fr) minmax(64px, auto);
  min-height: calc(var(--md3-touch-target-min) + var(--uk-space-12));
  padding: var(--article-row-inset-y) var(--article-row-inset-x);
  text-decoration: none;
  transition:
    background-color var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short3) var(--md3-motion-easing-standard);
}

.variance-row__label {
  color: var(--article-ink);
  font-size: var(--md3-type-body-medium-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-body-medium-line-height);
}

.variance-row__track {
  background: var(--article-line-soft);
  border-radius: var(--article-radius);
  display: block;
  height: var(--uk-space-16);
  overflow: hidden;
  position: relative;
  width: 100%;
}

.variance-row__track::before {
  background: var(--article-muted);
  content: "";
  height: 100%;
  left: 33%;
  opacity: var(--uk-opacity-55);
  position: absolute;
  top: 0;
  width: var(--uk-space-2);
  z-index: 2;
}

.variance-row__fill {
  background: var(--article-ink);
  border-radius: inherit;
  display: block;
  height: 100%;
  opacity: var(--uk-opacity-85);
  position: absolute;
  top: 0;
  transform-origin: left center;
  transition:
    opacity var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--article-motion-reveal) var(--md3-motion-easing-decelerate);
}

.variance-row:hover .variance-row__fill,
.variance-row:focus-visible .variance-row__fill {
  opacity: 1;
}

.variance-row__value {
  color: var(--article-ink);
  font-family: var(--uk-font-family-mono);
  font-size: var(--md3-type-title-medium-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-title-medium-line-height);
  text-align: right;
}

.variance-row--qje .variance-row__fill {
  left: 33%;
  width: 20%;
}

.variance-row--software .variance-row__fill {
  left: 33%;
  width: 35%;
}

.variance-row--marketing .variance-row__fill {
  left: 33%;
  width: 67%;
}

.variance-row--metr .variance-row__fill {
  background: var(--article-muted);
  left: 8%;
  width: 25%;
}

.task-row {
  align-items: baseline;
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  color: inherit;
  display: grid;
  gap: var(--uk-space-8) var(--uk-space-16);
  grid-template-columns: minmax(160px, 0.8fr) minmax(112px, auto) minmax(220px, 1fr);
  min-height: calc(var(--md3-touch-target-min) + var(--uk-space-8));
  padding: var(--article-row-inset-y) var(--article-row-inset-x);
  text-decoration: none;
  transition:
    background-color var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short3) var(--md3-motion-easing-standard);
}

.task-row span {
  color: var(--article-muted);
  font-size: var(--md3-type-label-large-font-size);
  font-weight: var(--uk-font-weight-semibold);
  line-height: var(--md3-type-label-large-line-height);
}

.task-row strong {
  color: var(--article-ink);
  font-family: var(--uk-font-family-mono);
  font-size: var(--md3-type-title-large-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-title-large-line-height);
}

.task-row p {
  font-size: var(--md3-type-body-medium-font-size);
  line-height: var(--md3-type-body-medium-line-height);
  margin-bottom: var(--uk-space-0);
}

.failure-row {
  align-items: baseline;
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  color: inherit;
  display: grid;
  gap: var(--uk-space-8) var(--uk-space-16);
  grid-template-columns: minmax(138px, 0.7fr) minmax(104px, auto) minmax(240px, 1fr);
  min-height: calc(var(--md3-touch-target-min) + var(--uk-space-12));
  padding: var(--article-row-inset-y) var(--article-row-inset-x);
  text-decoration: none;
  transition:
    background-color var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short3) var(--md3-motion-easing-standard);
}

.failure-row span {
  color: var(--article-muted);
  font-size: var(--md3-type-label-large-font-size);
  font-weight: var(--uk-font-weight-semibold);
  line-height: var(--md3-type-label-large-line-height);
}

.failure-row strong {
  color: var(--article-ink);
  font-family: var(--uk-font-family-mono);
  font-size: var(--md3-type-headline-small-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-headline-small-line-height);
}

.failure-row p {
  color: var(--article-muted);
  font-size: var(--md3-type-body-medium-font-size);
  line-height: var(--md3-type-body-medium-line-height);
  margin-bottom: var(--uk-space-0);
}

.effect-ladder {
  margin-top: var(--uk-space-32);
}

.effect-ladder article {
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  display: grid;
  gap: var(--uk-space-8);
  grid-template-columns: minmax(120px, 0.48fr) minmax(180px, 0.72fr) minmax(220px, 1fr);
  padding: var(--uk-space-20) var(--article-row-inset-x);
}

.effect-ladder span {
  color: var(--article-muted);
  font-size: var(--md3-type-label-medium-font-size);
  font-weight: var(--uk-font-weight-semibold);
  line-height: var(--md3-type-label-medium-line-height);
}

.effect-ladder strong {
  color: var(--article-ink);
  font-size: var(--md3-type-title-medium-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-title-medium-line-height);
}

.effect-ladder p {
  font-size: var(--md3-type-body-medium-font-size);
  line-height: var(--md3-type-body-medium-line-height);
  margin-bottom: var(--uk-space-0);
}

.metric-grid {
  background: var(--md3-color-surface-container-lowest);
  border-bottom: var(--uk-space-2) solid var(--article-line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(var(--uk-space-0), 1fr));
}

.metric-card {
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  color: inherit;
  display: grid;
  gap: var(--uk-space-8);
  min-height: calc(var(--uk-space-80) + var(--uk-space-56));
  padding: var(--uk-space-24);
  text-decoration: none;
  transition:
    background-color var(--md3-motion-duration-short3) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short3) var(--md3-motion-easing-standard);
}

.metric-card:nth-child(odd) {
  border-right: var(--uk-space-2) solid var(--article-line-soft);
}

.metric-card:nth-child(even) {
  padding-right: var(--uk-space-24);
}

.metric-card span {
  color: var(--article-muted);
  font-size: var(--md3-type-label-medium-font-size);
  font-weight: var(--uk-font-weight-semibold);
  line-height: var(--md3-type-label-medium-line-height);
}

.metric-card strong {
  color: var(--article-ink);
  font-family: var(--uk-font-family-mono);
  font-size: var(--md3-type-headline-medium-font-size);
  font-weight: var(--uk-font-weight-medium);
  line-height: var(--md3-type-headline-medium-line-height);
}

.metric-card p,
.data-note {
  margin-bottom: var(--uk-space-0);
}

.metric-card p {
  color: var(--article-muted);
  font-size: var(--md3-type-body-medium-font-size);
  line-height: var(--md3-type-body-medium-line-height);
}

.metric-card:hover,
.metric-card:focus-visible,
.denominator-row:hover,
.denominator-row:focus-visible,
.task-row:hover,
.task-row:focus-visible,
.failure-row:hover,
.failure-row:focus-visible,
.bar-row:hover,
.bar-row:focus-visible,
.variance-row:hover,
.variance-row:focus-visible {
  background: var(--article-surface-muted);
  outline: 0;
}

/* Press feedback for the citation-jump rows. Background-only (no transform),
   so a tap on touch devices confirms the press without the hover-only shift. */
.denominator-row:active,
.task-row:active,
.failure-row:active,
.bar-row:active,
.variance-row:active,
.evidence-row:active {
  background: var(--article-surface-muted);
}

.metric-card:focus-visible,
.denominator-row:focus-visible,
.task-row:focus-visible,
.failure-row:focus-visible,
.bar-row:focus-visible,
.variance-row:focus-visible,
.evidence-row:focus-visible {
  outline: var(--uk-a11y-focus-width) solid var(--uk-color-focus-ring);
  outline-offset: var(--uk-a11y-focus-offset);
}

@media (hover: hover) and (pointer: fine) {
  .metric-card:hover,
  .metric-card:focus-visible,
  .denominator-row:hover,
  .denominator-row:focus-visible,
  .task-row:hover,
  .task-row:focus-visible,
  .failure-row:hover,
  .failure-row:focus-visible,
  .bar-row:hover,
  .bar-row:focus-visible,
  .variance-row:hover,
  .variance-row:focus-visible {
    transform: translateX(var(--uk-space-2));
  }
}

.data-note {
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  padding-top: var(--uk-space-12);
}

.principle-grid {
  border-bottom: var(--uk-space-2) solid var(--article-line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(var(--uk-space-0), 1fr));
  margin: var(--uk-space-24) var(--uk-space-0);
}

.principle-grid article {
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  padding: var(--uk-space-20) var(--uk-space-20) var(--uk-space-20) var(--uk-space-0);
}

.principle-grid article:nth-child(odd) {
  border-right: var(--uk-space-2) solid var(--article-line-soft);
}

.principle-grid article:nth-child(even) {
  padding-left: var(--uk-space-20);
}

.principle-grid p {
  font-size: var(--md3-type-body-medium-font-size);
  margin-bottom: var(--uk-space-0);
}

.limitations-section {
  border: var(--uk-space-2) solid var(--article-line-soft);
  border-radius: var(--article-radius);
  background: var(--article-surface);
  box-shadow: var(--article-surface-shadow);
  padding: var(--article-panel-inset);
}

.limitations-section p:last-child {
  margin-bottom: var(--uk-space-0);
}

.sources-section {
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  padding-top: var(--uk-space-48);
  position: relative;
}

.source-grid {
  background: var(--article-surface);
  border-bottom: var(--uk-space-2) solid var(--article-line-soft);
  border-radius: var(--article-radius);
  box-shadow: var(--article-surface-shadow);
  display: grid;
  margin-top: var(--uk-space-24);
  overflow: clip;
}

.source-card {
  border-top: var(--uk-space-2) solid var(--article-line-soft);
  outline: 0;
  padding: var(--uk-space-20) var(--article-row-inset-x) var(--uk-space-20) calc(var(--article-row-inset-x) + var(--uk-space-8));
  position: relative;
  transition:
    border-color var(--article-motion-state) var(--md3-motion-easing-standard),
    background-color var(--article-motion-state) var(--md3-motion-easing-standard);
}

.source-card::before {
  background: var(--article-accent);
  content: "";
  inset-block: var(--uk-space-20);
  inset-inline-start: var(--article-row-inset-x);
  opacity: var(--uk-opacity-0);
  position: absolute;
  transition: opacity var(--article-motion-state) var(--md3-motion-easing-standard);
  width: var(--uk-space-4);
}

.source-card:target,
.source-card.is-active {
  border-color: var(--article-accent);
}

.source-card:target::before,
.source-card.is-active::before {
  opacity: var(--uk-opacity-100);
}

.source-card:focus-visible {
  outline: var(--uk-a11y-focus-width) solid var(--uk-color-focus-ring);
  outline-offset: var(--uk-a11y-focus-offset);
}

.source-card p {
  font-size: var(--md3-type-body-medium-font-size);
}

.source-card a {
  align-items: center;
  color: var(--article-ink);
  display: inline-flex;
  font-size: var(--md3-type-label-large-font-size);
  font-weight: var(--uk-font-weight-medium);
  min-height: var(--md3-touch-target-min);
  text-decoration-color: var(--article-line);
  text-underline-offset: var(--uk-space-4);
}

.source-card:hover,
.source-card:focus-within {
  background: var(--article-surface-muted);
}

.article-section:not(.limitations-section)::before,
.sources-section::before {
  background: linear-gradient(
    to bottom,
    transparent,
    var(--article-line-soft) var(--uk-space-20),
    var(--article-line-soft) calc(100% - var(--uk-space-20)),
    transparent
  );
  content: "";
  inset-block: var(--uk-space-48) var(--uk-space-0);
  inset-inline-start: calc(var(--article-indent-section) - var(--article-indent-tight));
  opacity: var(--uk-opacity-38);
  pointer-events: none;
  position: absolute;
  transform: scaleY(var(--section-line-scale, 1));
  transform-origin: center top;
  transition:
    opacity var(--article-motion-state) var(--md3-motion-easing-standard),
    transform var(--article-motion-line) var(--md3-motion-easing-decelerate);
  width: var(--uk-space-2);
}

.article-section:first-child::before {
  inset-block-start: var(--uk-space-0);
}

.article-section.is-current::before,
.sources-section.is-current::before {
  opacity: var(--uk-opacity-60);
}

.article-section > .section-label,
.sources-section > .section-label {
  transition: color var(--article-motion-state) var(--md3-motion-easing-standard);
}

.article-section.is-current > .section-label,
.sources-section.is-current > .section-label {
  color: var(--article-ink);
}

.article-section > :where(p:not(.section-label), .research-abstract, .finding-list, .insight-panel, .data-figure, .effect-ladder, .principle-grid),
.sources-section > :where(p:not(.section-label), .source-grid) {
  margin-inline-start: var(--article-indent-section);
}

.article-section > :where(p:not(.section-label)),
.sources-section > :where(p:not(.section-label)) {
  max-width: calc(100% - var(--article-indent-section));
}

.research-abstract > p:not(.section-label) {
  margin-inline-start: var(--article-indent-nested);
  max-width: calc(100% - var(--article-indent-nested));
}

.data-figure,
.finding-list,
.insight-panel,
.effect-ladder,
.principle-grid {
  position: relative;
  transform-style: preserve-3d;
}

.data-figure::before,
.finding-list::before,
.effect-ladder::before,
.principle-grid::before {
  background: var(--article-line-soft);
  content: "";
  inset-block: var(--uk-space-20) var(--uk-space-12);
  inset-inline-start: calc(var(--article-indent-nested) - var(--article-indent-tight));
  opacity: var(--depth-rail-opacity, var(--uk-opacity-24));
  pointer-events: none;
  position: absolute;
  transform: scaleY(var(--nested-line-scale, 1));
  transform-origin: center top;
  transition:
    opacity var(--article-motion-state) var(--md3-motion-easing-standard),
    transform var(--article-motion-line) var(--md3-motion-easing-decelerate);
  width: var(--uk-space-2);
}

.data-figure > :where(.denominator-ledger, .bar-chart, .failure-ledger, .task-ledger, .variance-chart, .metric-grid, .data-note) {
  margin-inline-start: var(--article-indent-nested);
}

.is-ready .will-reveal {
  --reveal-y: var(--article-focus-rise);
  --section-line-scale: 0.74;
  --nested-line-scale: 0.68;
  opacity: var(--uk-opacity-0);
  transform: translate3d(0, var(--article-focus-rise), 0);
  transition:
    opacity var(--article-motion-line) var(--md3-motion-easing-standard),
    transform var(--article-motion-reveal) var(--md3-motion-easing-decelerate);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: transform;
}

.is-ready .will-reveal.is-visible {
  --reveal-y: 0px;
  --section-line-scale: 1;
  --nested-line-scale: 1;
  opacity: var(--uk-opacity-100);
  transform: translate3d(0, var(--uk-space-0), 0);
  will-change: auto;
}

.is-ready .motion-depth {
  --reveal-y: 0px;
  --depth-y: var(--article-depth-y);
  --depth-z: var(--article-depth-z);
  --depth-scale: var(--article-depth-scale);
  --depth-tilt: var(--article-depth-tilt);
  --stack-y: var(--uk-space-0);
  --stack-layer: 0;
  --stack-opacity: 0.3;
  --stack-shadow-y: var(--uk-space-0);
  --stack-shadow-blur: var(--uk-space-0);
  --stack-shadow-opacity: 0%;
  box-shadow:
    0 var(--stack-shadow-y) var(--stack-shadow-blur)
    color-mix(in srgb, var(--article-ink) var(--stack-shadow-opacity), transparent),
    var(--article-surface-shadow);
  transform:
    translate3d(0, calc(var(--reveal-y) + var(--depth-y) + var(--stack-y)), var(--depth-z))
    scale(var(--depth-scale))
    rotateX(var(--depth-tilt));
  transform-origin: center top;
  transform-style: preserve-3d;
  z-index: var(--stack-layer);
}

.is-ready .will-reveal.motion-depth.is-visible {
  transform:
    translate3d(0, calc(var(--reveal-y) + var(--depth-y) + var(--stack-y)), var(--depth-z))
    scale(var(--depth-scale))
    rotateX(var(--depth-tilt));
  transition:
    opacity var(--article-motion-line) var(--md3-motion-easing-standard),
    transform var(--article-motion-reveal) var(--md3-motion-easing-decelerate);
}

.is-ready .motion-depth.is-depth-tracking {
  transition:
    opacity var(--article-motion-line) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short2) var(--md3-motion-easing-standard),
    box-shadow var(--article-motion-state) var(--md3-motion-easing-standard);
  will-change: auto;
}

.article-page.is-scroll-active .motion-depth.is-depth-tracking {
  transition:
    opacity var(--article-motion-line) var(--md3-motion-easing-standard),
    transform var(--md3-motion-duration-short2) var(--md3-motion-easing-standard),
    box-shadow var(--article-motion-state) var(--md3-motion-easing-standard);
}

.article-page.is-scroll-settled .motion-depth.is-depth-tracking {
  transition:
    opacity var(--article-motion-line) var(--md3-motion-easing-standard),
    transform var(--article-motion-stack) var(--md3-motion-easing-decelerate),
    box-shadow var(--article-motion-stack) var(--md3-motion-easing-decelerate);
}

.is-ready .article-section.is-current > .data-figure.motion-depth,
.is-ready .article-section.is-current > .finding-list.motion-depth,
.is-ready .article-section.is-current > .insight-panel.motion-depth,
.is-ready .article-section.is-current > .effect-ladder.motion-depth,
.is-ready .article-section.is-current > .principle-grid.motion-depth {
  box-shadow:
    0 var(--stack-shadow-y) var(--stack-shadow-blur)
    color-mix(in srgb, var(--article-ink) var(--stack-shadow-opacity), transparent),
    0 var(--uk-space-4) var(--uk-space-16) color-mix(in srgb, var(--article-ink) 4%, transparent);
}

.is-ready .data-figure.will-reveal :where(.bar-row__fill, .variance-row__fill) {
  transform: scaleX(0.04);
}

.is-ready .data-figure.will-reveal.is-visible :where(.bar-row__fill, .variance-row__fill) {
  transform: scaleX(1);
}

.is-ready .data-figure.will-reveal.is-visible :where(.bar-row:nth-child(2), .variance-row:nth-child(2)) :where(.bar-row__fill, .variance-row__fill) {
  transition-delay: calc(var(--reveal-delay, 0ms) + 72ms);
}

.is-ready .data-figure.will-reveal.is-visible :where(.bar-row:nth-child(3), .variance-row:nth-child(3)) :where(.bar-row__fill, .variance-row__fill) {
  transition-delay: calc(var(--reveal-delay, 0ms) + 108ms);
}

.is-ready .data-figure.will-reveal.is-visible :where(.bar-row:nth-child(4), .variance-row:nth-child(4)) :where(.bar-row__fill, .variance-row__fill) {
  transition-delay: calc(var(--reveal-delay, 0ms) + 144ms);
}

.is-ready .data-figure.will-reveal.is-visible :where(.bar-row:nth-child(5), .variance-row:nth-child(5)) :where(.bar-row__fill, .variance-row__fill) {
  transition-delay: calc(var(--reveal-delay, 0ms) + 180ms);
}

@media (min-width: 840px) and (prefers-reduced-motion: no-preference) {
  .is-ready .article-section--visual .data-figure.motion-depth {
    --depth-z: calc(var(--uk-space-6) * -1);
    transform-origin: center top;
  }

  .is-ready .article-section--visual .data-figure.motion-depth.is-depth-tracking {
    will-change: auto;
  }
}

@media (max-width: 1200px) {
  .article-hero {
    grid-template-columns: 1fr;
    max-width: 840px;
  }

  .evidence-table {
    align-self: stretch;
  }
}

@media (min-width: 761px) and (max-width: 1100px) {
  .article-hero {
    gap: var(--uk-space-32);
    padding-bottom: var(--uk-space-56);
    padding-top: var(--uk-space-56);
  }

  .article-page h1 {
    font-size: var(--md3-type-headline-large-font-size);
    max-width: 18ch;
  }

  .article-deck {
    font-size: var(--md3-type-title-medium-font-size);
    max-width: 62ch;
  }

  .evidence-table {
    grid-template-columns: repeat(2, minmax(var(--uk-space-0), 1fr));
  }

  .evidence-table .section-label {
    grid-column: 1 / -1;
  }

  .evidence-row {
    align-items: start;
    grid-template-columns: 1fr;
    padding: var(--uk-space-12) var(--article-row-inset-x);
  }

  .evidence-row__source {
    grid-column: 1;
  }
}

@media (max-width: 760px) {
  .article-page {
    --article-edge: var(--uk-space-16);
    --article-indent-section: var(--uk-space-12);
    --article-indent-nested: var(--uk-space-8);
    --article-indent-tight: var(--uk-space-6);
  }

  .article-hero {
    gap: var(--uk-space-32);
    padding-bottom: var(--uk-space-40);
    padding-top: var(--uk-space-40);
  }

  .article-page h1 {
    font-size: var(--md3-type-headline-large-font-size);
    max-width: 100%;
  }

  .article-deck,
  .article-lede {
    font-size: var(--md3-type-title-medium-font-size);
  }

  .evidence-row {
    align-items: start;
    grid-template-columns: 1fr;
    min-height: calc(var(--md3-touch-target-min) + var(--uk-space-4));
    padding: var(--uk-space-12) var(--article-row-inset-x);
  }

  .evidence-row__source {
    grid-column: 1;
  }

  .evidence-row__metric {
    font-size: var(--md3-type-title-large-font-size);
  }

  .evidence-row__claim {
    font-size: var(--md3-type-body-medium-font-size);
    line-height: var(--md3-type-body-medium-line-height);
  }

  .article-layout {
    padding-bottom: var(--uk-space-64);
    padding-top: var(--uk-space-0);
  }

  .article-content {
    gap: var(--uk-space-56);
    perspective: 900px;
    perspective-origin: 50% 46vh;
  }

  .article-section {
    padding-top: var(--uk-space-40);
  }

  .finding-list article {
    grid-template-columns: 1fr;
  }

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

  .denominator-row,
  .task-row,
  .failure-row,
  .effect-ladder article {
    grid-template-columns: 1fr;
  }

  .variance-row,
  .bar-row {
    align-items: start;
    grid-template-columns: 1fr auto;
  }

  .variance-row__track,
  .bar-row__track {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .metric-card,
  .metric-card:nth-child(even),
  .metric-card:nth-child(odd) {
    border-right: 0;
    padding-left: var(--uk-space-20);
    padding-right: var(--uk-space-20);
  }

  .principle-grid article,
  .principle-grid article:nth-child(even) {
    border-right: 0;
    padding-left: var(--uk-space-0);
    padding-right: var(--uk-space-0);
  }
}

@media (max-width: 420px) {
  .article-page {
    --article-indent-section: var(--uk-space-8);
    --article-indent-nested: var(--uk-space-6);
    --article-indent-tight: var(--uk-space-4);
  }

  .article-page h1 {
    font-size: var(--md3-type-headline-large-font-size);
  }
}

@media (prefers-reduced-motion: reduce) {
  .source-card,
  .source-card::before,
  .citation,
  .article-progress span,
  .article-section::before,
  .sources-section::before,
  .data-figure::before,
  .finding-list::before,
  .effect-ladder::before,
  .principle-grid::before,
  .will-reveal,
  .is-ready .will-reveal,
  .is-ready .will-reveal.is-visible,
  .is-ready .motion-depth,
  .is-ready .motion-depth.is-depth-tracking,
  .article-page.is-scroll-active .motion-depth.is-depth-tracking,
  .article-page.is-scroll-settled .motion-depth.is-depth-tracking,
  .is-ready .will-reveal.motion-depth,
  .is-ready .will-reveal.motion-depth.is-visible,
  .bar-row__fill,
  .variance-row__fill,
  .evidence-row,
  .denominator-row,
  .task-row,
  .failure-row,
  .metric-card,
  .bar-row,
  .variance-row {
    transition: none;
  }

  .will-reveal,
  .is-ready .will-reveal,
  .is-ready .will-reveal.is-visible,
  .is-ready .motion-depth,
  .is-ready .motion-depth.is-depth-tracking,
  .article-page.is-scroll-active .motion-depth.is-depth-tracking,
  .article-page.is-scroll-settled .motion-depth.is-depth-tracking,
  .is-ready .will-reveal.motion-depth,
  .is-ready .will-reveal.motion-depth.is-visible {
    opacity: 1;
    box-shadow: none;
    transform: none;
  }

  .bar-row__fill,
  .variance-row__fill {
    transform: none;
  }
}