:root {
  --ink: #102f39;
  --ink-2: #28464d;
  --text: #38545a;
  --muted: #6a7c7e;
  --faint: #93a09f;
  --paper: #fbfaf6;
  --canvas: #f3f0e8;
  --white: #ffffff;
  --wash: #e8efeb;
  --wash-blue: #e8f0f2;
  --line: #ced8d4;
  --line-dark: #aabbb7;
  --teal: #087d79;
  --teal-dark: #075c5c;
  --teal-soft: #d8ece7;
  --acceptance-green: #247847;
  --acceptance-green-soft: #e4f0e7;
  --coral: #c9694d;
  --coral-soft: #f1ddd4;
  --violet: #715e8a;
  --violet-soft: #e5deed;
  --amber: #b98226;
  --shadow: 0 20px 55px rgba(18, 50, 58, 0.10);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Avenir Next", Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --container: 1280px;
  --reading: 760px;
  --nav-height: 66px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 24px);
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.lightbox-open {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #e6a856;
  outline-offset: 4px;
}

::selection {
  color: var(--white);
  background: var(--teal);
}

p,
h1,
h2,
h3,
figure,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3 {
  color: var(--ink);
  text-wrap: balance;
}

h1,
h2 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.038em;
}

h2 {
  font-size: clamp(2.05rem, 3.15vw, 3.3rem);
  line-height: 1.08;
}

h3 {
  font-size: 1.15rem;
  line-height: 1.3;
}

.container {
  width: min(var(--container), calc(100% - 80px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 10px 15px;
  color: var(--white);
  background: var(--ink);
  border-radius: 4px;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

.eyebrow,
.card-label,
.resource-type {
  color: var(--teal-dark);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  line-height: 1.4;
  text-transform: uppercase;
}

/* Hero */

.site-header {
  position: relative;
  min-height: min(940px, 100svh);
  overflow: hidden;
  color: var(--ink-2);
  background:
    radial-gradient(circle at 88% 5%, rgba(122, 157, 147, 0.18), transparent 29%),
    linear-gradient(135deg, #f8f5ee 0%, #f2efe7 58%, #e8eee9 100%);
  border-bottom: 1px solid var(--line);
}

.hero-noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.24;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.12'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(500px, 0.95fr);
  align-items: center;
  gap: clamp(36px, 6vw, 96px);
  min-height: min(890px, calc(100svh - 44px));
  padding-block: 70px 100px;
}

.hero-grid > * {
  min-width: 0;
}

.hero-copy {
  min-width: 0;
  max-width: 720px;
}

.venue-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(34px, 6vh, 68px);
  padding: 8px 13px;
  color: var(--ink-2);
  background: var(--acceptance-green-soft);
  border: 1px solid rgba(36, 120, 71, 0.3);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.venue-line strong {
  color: var(--acceptance-green);
  font-size: 1.08em;
  font-weight: 800;
}

.status-dot {
  width: 7px;
  height: 7px;
  background: var(--acceptance-green);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(36, 120, 71, 0.12);
}

h1 {
  max-width: 720px;
  font-size: clamp(calc(3.125rem - 2px), calc(5.1vw - 4px), calc(5.375rem - 2px));
  line-height: 0.92;
}

h1 > span {
  display: block;
  margin-bottom: 0.12em;
  color: var(--coral);
}

h1 em {
  display: block;
  color: var(--teal-dark);
  font-weight: 400;
}

.hero-claim {
  max-width: 620px;
  margin-top: 22px;
  color: var(--coral);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.5;
  text-transform: uppercase;
}

.hero-dek {
  max-width: 660px;
  margin-top: 16px;
  color: var(--ink-2);
  font-size: clamp(1.08rem, 1.5vw, 1.33rem);
  line-height: 1.5;
  overflow-wrap: break-word;
}

.author-block {
  margin-top: 29px;
  padding-left: 15px;
  border-left: 2px solid var(--coral);
}

.authors {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 650;
}

.authors a {
  text-decoration: underline;
  text-decoration-color: rgba(8, 125, 121, 0.32);
}

.authors a:hover {
  text-decoration-color: currentColor;
}

.affiliation {
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 10px 16px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--line-dark);
  border-radius: 5px;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.button svg {
  width: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.button:hover {
  background: var(--white);
  border-color: var(--teal);
  transform: translateY(-2px);
}

.button-primary {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.button-primary:hover {
  color: var(--white);
  background: var(--teal-dark);
}

.resource-qualifier {
  max-width: 650px;
  margin-top: 13px;
  color: var(--muted);
  font-size: calc(0.75rem + 2px);
  line-height: 1.5;
}

.hero-figure {
  position: relative;
  padding: 18px 18px 13px;
  background: rgba(253, 252, 248, 0.76);
  border: 1px solid rgba(158, 178, 172, 0.66);
  border-radius: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-figure::before,
.hero-figure::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.hero-figure::before {
  top: -7px;
  left: 32px;
  width: 70px;
  height: 14px;
  background: var(--coral-soft);
  border: 1px solid rgba(201, 105, 77, 0.35);
  border-radius: 2px;
}

.hero-figure figcaption {
  padding: 10px 12px 2px;
  color: var(--muted);
  font-family: var(--serif);
  font-size: calc(0.86rem + 2px);
  font-style: italic;
  text-align: center;
}

.hero-figure svg {
  width: 100%;
  height: auto;
  overflow: visible;
}

.diagram-grid path {
  fill: none;
  stroke: #d5dfda;
  stroke-width: 0.7;
}

.svg-kicker {
  fill: var(--muted);
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.4px;
}

.stream-row text {
  fill: var(--ink);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
}

.stream-row path {
  fill: none;
  stroke: var(--coral);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.stream-row:nth-child(even) path {
  stroke: var(--violet);
}

.stream-row circle {
  fill: var(--teal);
}

.flow-connections path,
.output-links path {
  fill: none;
  stroke: #7ba49c;
  stroke-dasharray: 5 6;
  stroke-width: 1.4;
  animation: data-flow 8s linear infinite;
}

.output-links path {
  stroke: var(--violet);
}

@keyframes data-flow {
  to { stroke-dashoffset: -88; }
}

.model-eyebrow {
  fill: #b9d8d2;
  font-family: var(--sans);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
}

.model-name {
  fill: var(--white);
  font-family: var(--serif);
  font-size: 27px;
}

.model-node g rect {
  fill: rgba(255, 255, 255, 0.17);
  stroke: rgba(255, 255, 255, 0.34);
}

.task-nodes circle {
  fill: var(--violet-soft);
  stroke: var(--violet);
  stroke-width: 1;
}

.task-nodes g:nth-of-type(even) circle {
  fill: var(--teal-soft);
  stroke: var(--teal);
}

.task-nodes g text {
  fill: var(--ink-2);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
}

.diagram-caption circle {
  fill: var(--coral);
}

.diagram-caption text {
  fill: var(--muted);
  font-family: var(--serif);
  font-size: 12px;
  font-style: italic;
}

.scroll-cue {
  position: absolute;
  bottom: 20px;
  left: 50%;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-decoration: none;
  text-transform: uppercase;
  transform: translateX(-50%);
}

.scroll-cue span:last-child {
  color: var(--coral);
  font-size: 1rem;
}

/* Sticky navigation */

.section-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(251, 250, 246, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.nav-inner {
  display: flex;
  align-items: center;
  height: 100%;
}

.nav-mark {
  flex: 0 0 auto;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.nav-mark span {
  color: var(--coral);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 2.7vw, 38px);
  min-width: 0;
  margin-inline: auto;
}

.nav-links a,
.nav-paper {
  position: relative;
  color: var(--muted);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 160ms ease;
}

.nav-links a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--coral);
  transform: scaleX(0);
  transition: transform 160ms ease;
}

.nav-links a:hover,
.nav-links a.active,
.nav-paper:hover {
  color: var(--ink);
}

.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-paper {
  flex: 0 0 auto;
  padding: 7px 10px;
  color: var(--teal-dark);
  border: 1px solid var(--line-dark);
  border-radius: 3px;
}

.reading-progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  overflow: hidden;
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--coral));
  transform: scaleX(0);
  transform-origin: left;
}

/* Shared sections */

.section {
  position: relative;
  padding-block: clamp(90px, 11vw, 160px);
}

.section-intro {
  margin-bottom: clamp(50px, 7vw, 90px);
}

.section-intro .eyebrow,
.section-rail .eyebrow {
  margin-bottom: 24px;
}

.section-intro-wide h2 {
  max-width: 1000px;
}

.split-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.66fr);
  align-items: end;
  gap: clamp(45px, 8vw, 120px);
}

.split-intro > p {
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.75;
}

.editorial-grid {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: clamp(50px, 8vw, 120px);
}

.section-rail {
  padding-top: 9px;
}

.rail-note {
  color: var(--muted);
  font-family: var(--serif);
  font-size: calc(0.9rem + 2px);
  font-style: italic;
  line-height: 1.6;
}

.editorial-main > h2 {
  max-width: 920px;
}

.lead {
  max-width: 900px;
  margin-top: 36px;
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: clamp(1.16rem, 1.6vw, 1.55rem);
  line-height: 1.5;
}

/* Accelerator primer */

.section-accelerator {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.accelerator-title-intro {
  max-width: 850px;
}

.accelerator-scale-note {
  display: grid;
  grid-template-columns: minmax(220px, 0.55fr) minmax(0, 1.45fr);
  gap: clamp(38px, 7vw, 105px);
  margin-top: clamp(48px, 6vw, 76px);
  padding-block: clamp(28px, 3.5vw, 42px);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line);
}

.accelerator-scale-note .subsection-label {
  margin-bottom: 11px;
}

.accelerator-scale-note h3 {
  max-width: 330px;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2vw, 1.8rem);
  font-weight: 400;
  line-height: 1.18;
}

.accelerator-scale-copy {
  display: grid;
  gap: 14px;
  max-width: 790px;
  color: var(--ink-2);
  font-size: 1rem;
  line-height: 1.75;
}

.accelerator-scale-copy p {
  margin: 0;
}

.accelerator-figure {
  overflow: hidden;
  background: #f7f6f1;
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: 0 22px 60px rgba(22, 53, 58, 0.06);
}

.accelerator-figure-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding: 22px 26px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.accelerator-figure-heading .subsection-label {
  margin-bottom: 7px;
}

.accelerator-figure-heading h3,
.context-heading {
  font-family: var(--serif);
  font-size: 1.42rem;
  font-weight: 400;
}

.accelerator-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
  color: var(--muted);
  font-size: 0.65rem;
}

.accelerator-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.accelerator-legend i {
  display: block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.legend-particle { background: var(--coral); }
.legend-rf {
  background: var(--coral-soft);
  border: 1px solid var(--coral);
}
.legend-magnet { background: var(--violet); }
.legend-sensor { background: var(--teal); }

.diagram-scroll-hint {
  display: none;
  color: var(--teal-dark);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.accelerator-visual-scroll {
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-color: var(--line-dark) transparent;
  background-color: #f7f6f1;
  background-image:
    linear-gradient(rgba(17, 105, 103, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 105, 103, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
}

.accelerator-visual-scroll:focus-visible {
  outline-offset: -4px;
}

.accelerator-diagram {
  width: 100%;
  min-width: 920px;
  height: auto;
}

.accelerator-stage-labels,
.instrumentation-title {
  fill: var(--teal-dark);
  font-family: var(--sans);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.accelerator-stage-names {
  fill: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
}

.beam-pipe {
  fill: none;
  stroke: #d4ddda;
  stroke-linecap: round;
  stroke-width: 16;
}

.beam-core {
  fill: none;
  stroke: url(#beamGradient);
  stroke-linecap: round;
  stroke-width: 3;
}

.unbent-reference {
  fill: none;
  stroke: #aebbb7;
  stroke-dasharray: 3 5;
  stroke-width: 1;
  opacity: 0.8;
}

.energy-scale {
  fill: var(--muted);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.09em;
}

.energy-scale path {
  fill: none;
  stroke: url(#energyGradient);
  stroke-width: 1.2;
}

#energyArrow path {
  fill: var(--coral);
}

#fieldArrow path {
  fill: var(--violet);
}

.particle-source rect {
  fill: var(--wash-blue);
  stroke: #8caaa9;
  stroke-width: 1.4;
}

.particle-source path {
  fill: none;
  stroke: var(--ink-2);
  stroke-width: 1.3;
}

.particle-source circle {
  fill: var(--coral-soft);
  stroke: var(--coral);
  stroke-width: 1.4;
}

.rf-cavities rect {
  fill: var(--coral-soft);
  stroke: #d08a72;
  stroke-width: 1.2;
}

.rf-cavities path {
  fill: none;
  stroke: var(--coral);
  stroke-width: 1.2;
}

.rf-cavities .rf-field-waves ellipse {
  fill: none;
  stroke: var(--coral);
  stroke-width: 1.3;
  transform-box: fill-box;
  transform-origin: center;
  animation: rf-field-pulse 1.25s ease-in-out infinite;
}

.rf-cavities .rf-field-waves ellipse:nth-child(even) {
  animation-delay: -0.625s;
}

.focus-envelope path {
  fill: none;
  stroke: var(--violet);
  stroke-dasharray: 4 4;
  stroke-width: 1.3;
  opacity: 0.8;
  animation: focus-breathe 2.4s ease-in-out infinite;
}

.dipole-magnet > path {
  fill: var(--violet-soft);
  stroke: var(--violet);
  stroke-linejoin: round;
  stroke-width: 1.4;
}

.dipole-field path {
  fill: none;
  stroke: var(--violet);
  stroke-width: 1.1;
  opacity: 0.7;
}

.quadrupoles path {
  fill: var(--violet-soft);
  stroke: var(--violet);
  stroke-width: 1.4;
}

.beam-diagnostics circle,
.beam-diagnostics rect {
  fill: var(--teal-soft);
  stroke: var(--teal);
  stroke-width: 1.4;
}

.beam-diagnostics path {
  fill: none;
  stroke: var(--teal-dark);
  stroke-width: 1.2;
}

.beam-diagnostics .diagnostic-scan {
  stroke: var(--teal);
  stroke-width: 2;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  animation: diagnostic-scan 1.9s ease-in-out infinite;
}

.beam-target path {
  fill: none;
  stroke: var(--coral);
  stroke-linecap: round;
  stroke-width: 3;
}

.beam-target .target-glow {
  fill: var(--coral-soft);
  stroke: var(--coral);
  stroke-width: 1;
  transform-box: fill-box;
  transform-origin: center;
  animation: target-glow 1.6s ease-out infinite;
}

.beam-target .target-rays {
  stroke-width: 1.5;
  animation: target-pulse 1.6s ease-in-out infinite;
}

.smiley-particle {
  filter: url(#beamGlow);
}

.smiley-particle .particle-body {
  stroke: rgba(116, 45, 35, 0.72);
  stroke-width: 1;
}

.smiley-particle .particle-eye {
  fill: #6f3028;
}

.smiley-particle .particle-smile {
  fill: none;
  stroke: #6f3028;
  stroke-linecap: round;
  stroke-width: 1.15;
}

.instrument-bus {
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.5;
}

#telemetryArrow path {
  fill: var(--teal);
}

.instrument-link {
  fill: none;
  stroke: #81aaa5;
  stroke-dasharray: 4 5;
  stroke-width: 1.2;
  animation: telemetry-link 1.6s linear infinite;
}

.instrumentation circle {
  fill: var(--paper);
  stroke: var(--teal);
  stroke-width: 1.4;
}

.instrumentation text:not(.instrumentation-title) {
  fill: var(--muted);
  font-family: var(--sans);
  font-size: 10px;
  text-anchor: middle;
}

.instrumentation .control-box {
  fill: var(--teal-soft);
  stroke: var(--teal);
  stroke-width: 1.2;
}

.instrumentation .telemetry-pulses circle {
  fill: var(--teal);
  stroke: var(--paper);
  stroke-width: 1.2;
}

.instrumentation .control-status {
  fill: var(--teal);
  stroke: var(--paper);
  stroke-width: 1;
  animation: control-status 1.6s ease-in-out infinite;
}

.instrumentation .control-title {
  fill: var(--teal-dark);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.instrumentation .control-copy {
  fill: var(--text);
  font-size: 9px;
}

.element-actions rect {
  stroke-width: 1;
}

.element-actions text {
  font-family: var(--sans);
  text-anchor: middle;
}

.element-actions .action-element {
  fill: var(--muted);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.element-actions .action-effect {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.element-actions .action-rf rect {
  fill: #f8e8e1;
  stroke: #dfab98;
}

.element-actions .action-rf .action-effect {
  fill: var(--coral);
}

.element-actions .action-magnet rect {
  fill: #eeebf4;
  stroke: #b7aac7;
}

.element-actions .action-magnet .action-effect {
  fill: var(--violet);
}

.element-actions .action-sensor rect {
  fill: var(--teal-soft);
  stroke: #83b6b0;
}

.element-actions .action-sensor .action-effect {
  fill: var(--teal-dark);
}

.accelerator-figure figcaption {
  padding: 17px 26px 19px;
  color: var(--muted);
  background: var(--paper);
  border-top: 1px solid var(--line);
  font-family: var(--serif);
  font-size: calc(0.86rem + 2px);
  font-style: italic;
}

.accelerator-context-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.88fr);
  gap: clamp(55px, 8vw, 115px);
  margin-top: clamp(60px, 7vw, 95px);
}

.accelerator-scale-note + .accelerator-context-grid {
  margin-top: clamp(50px, 6vw, 76px);
}

.context-heading {
  max-width: 520px;
  margin-bottom: 26px;
}

.application-list,
.facility-list {
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line-dark);
  list-style: none;
}

.application-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.application-list article {
  display: grid;
  grid-template-columns: 29px minmax(0, 1fr);
  gap: 11px;
  padding: 21px 24px 23px 0;
  border-bottom: 1px solid var(--line);
}

.application-list article:nth-child(even) {
  padding-right: 0;
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.application-list article > span {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 0.62rem;
}

.application-list h4 {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.04rem;
  font-weight: 400;
  line-height: 1.25;
}

.application-list p {
  margin-top: 7px;
  color: var(--muted);
  font-size: calc(0.72rem + 2px);
  line-height: 1.5;
}

.facility-list li {
  display: grid;
  grid-template-columns: 94px minmax(0, 1fr);
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.facility-list strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.04rem;
  font-weight: 400;
}

.facility-list span {
  color: var(--muted);
  font-size: calc(0.74rem + 2px);
}

@keyframes target-pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

@keyframes rf-field-pulse {
  0%, 100% { opacity: 0.22; transform: scaleX(0.65); }
  50% { opacity: 0.9; transform: scaleX(1); }
}

@keyframes focus-breathe {
  0%, 100% { opacity: 0.58; }
  50% { opacity: 0.95; }
}

@keyframes diagnostic-scan {
  0% { opacity: 0; transform: translateX(-7px); }
  20%, 80% { opacity: 0.85; }
  100% { opacity: 0; transform: translateX(28px); }
}

@keyframes target-glow {
  0% { opacity: 0.75; transform: scale(0.55); }
  75%, 100% { opacity: 0; transform: scale(1.5); }
}

@keyframes telemetry-link {
  to { stroke-dashoffset: -18; }
}

@keyframes control-status {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

/* Glance */

.section-glance {
  background: var(--paper);
}

.glance-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px minmax(0, 1fr) 34px minmax(0, 1fr) 34px minmax(0, 1fr);
  align-items: stretch;
  max-width: 1280px;
  margin-inline: auto;
}

.glance-card {
  position: relative;
  min-width: 0;
  min-height: 380px;
  padding: clamp(24px, 2.6vw, 34px);
  background: #f7f6f1;
  border: 1px solid var(--line);
}

.glance-card:first-child {
  border-radius: 12px 0 0 12px;
}

.glance-card:last-child {
  border-radius: 0 12px 12px 0;
}

.glance-card.featured {
  color: #dbe9e6;
  background: var(--ink);
  border-color: var(--ink);
  box-shadow: 0 12px 32px rgba(18, 50, 58, 0.09);
}

.glance-card.featured h3,
.glance-card.featured .card-label {
  color: var(--white);
}

.glance-card.featured p:last-child {
  color: #bcd0cc;
}

.glance-index {
  position: absolute;
  top: 22px;
  right: 24px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.glance-card h3 {
  margin-top: 13px;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 1.55vw, 1.55rem);
  font-weight: 400;
  line-height: 1.18;
}

.glance-card > p:last-child {
  margin-top: 19px;
  color: var(--muted);
  font-size: calc(0.9rem + 2px);
}

.glance-icon {
  position: relative;
  width: 94px;
  height: 68px;
  margin-bottom: 23px;
}

.glance-icon-specialists {
  display: grid;
  grid-template-columns: repeat(2, 32px);
  grid-template-rows: repeat(2, 24px);
  gap: 8px;
  align-content: center;
}

.glance-icon-specialists span {
  position: relative;
  background: var(--violet-soft);
  border: 1px solid var(--violet);
  border-radius: 4px;
}

.glance-icon-specialists span::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  content: "";
  background: var(--coral);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.glance-icon-problem span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--line-dark);
}

.glance-icon-problem span:nth-child(1) { top: 7px; width: 75%; }
.glance-icon-problem span:nth-child(2) { top: 25px; left: 17px; width: 82%; }
.glance-icon-problem span:nth-child(3) { top: 43px; width: 59%; }
.glance-icon-problem span:nth-child(4) { top: 61px; left: 28px; width: 68%; }

.glance-icon-problem span::after {
  position: absolute;
  top: -3px;
  right: 15%;
  width: 7px;
  height: 7px;
  content: "";
  background: var(--coral);
  border-radius: 50%;
}

.glance-icon-model span {
  position: absolute;
  top: 12px;
  bottom: 12px;
  width: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 12px;
}

.glance-icon-model span:nth-child(1) { left: 2px; }
.glance-icon-model span:nth-child(2) { left: 37px; background: rgba(8, 125, 121, 0.42); }
.glance-icon-model span:nth-child(3) { left: 72px; }

.glance-icon-model::before,
.glance-icon-model::after {
  position: absolute;
  top: 43px;
  width: 15px;
  height: 1px;
  content: "";
  background: var(--coral);
}

.glance-icon-model::before { left: 22px; }
.glance-icon-model::after { left: 57px; }

.glance-icon-impact span {
  position: absolute;
  left: 14px;
  width: 17px;
  height: 17px;
  background: var(--teal-soft);
  border: 1px solid var(--teal);
  border-radius: 50%;
}

.glance-icon-impact span:nth-child(1) { top: 26px; }
.glance-icon-impact span:nth-child(2) { top: 1px; left: 77px; }
.glance-icon-impact span:nth-child(3) { top: 26px; left: 77px; }
.glance-icon-impact span:nth-child(4) { top: 51px; left: 77px; }

.glance-icon-impact::before {
  position: absolute;
  top: 34px;
  left: 31px;
  width: 46px;
  height: 1px;
  content: "";
  background: var(--line-dark);
}

.flow-arrow {
  position: relative;
  z-index: 3;
  align-self: center;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--coral);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 1.2rem;
  transform: translateX(0);
}

/* Challenge */

.section-challenge {
  background: var(--canvas);
  border-block: 1px solid var(--line);
}

.challenge-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 45px;
  border-top: 1px solid var(--line-dark);
}

.challenge-list article {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 15px;
  padding: 30px 35px 30px 0;
  border-bottom: 1px solid var(--line);
}

.challenge-list article:nth-child(even) {
  padding-right: 0;
  padding-left: 35px;
  border-left: 1px solid var(--line);
}

.challenge-number {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.challenge-list p {
  margin-top: 8px;
  color: var(--muted);
  font-size: calc(0.87rem + 2px);
}

/* Method */

.section-method {
  background: var(--paper);
}

.method-sequence {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 75px;
  border-block: 1px solid var(--line);
}

.method-sequence article {
  position: relative;
  min-height: 300px;
  padding: 28px 27px 32px;
}

.method-sequence article + article {
  border-left: 1px solid var(--line);
}

.method-number {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.method-sequence h3 {
  margin-top: 23px;
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 400;
}

.method-sequence p {
  margin-top: 10px;
  color: var(--muted);
  font-size: calc(0.84rem + 2px);
}

.method-glyph {
  position: relative;
  width: 100px;
  height: 56px;
  margin-top: 27px;
}

.mask-glyph {
  display: grid;
  grid-template-columns: repeat(3, 23px);
  grid-template-rows: repeat(2, 23px);
  gap: 4px;
}

.mask-glyph i {
  background: var(--wash-blue);
  border: 1px solid #aac1c4;
}

.mask-glyph i:nth-child(2),
.mask-glyph i:nth-child(6) {
  background: var(--violet-soft);
  border-color: var(--violet);
}

.slot-glyph i {
  position: absolute;
  top: 15px;
  width: 27px;
  height: 27px;
  background: var(--teal-soft);
  border: 1px solid var(--teal);
  border-radius: 50%;
}

.slot-glyph i:nth-child(1) { left: 0; }
.slot-glyph i:nth-child(2) { left: 31px; top: 3px; }
.slot-glyph i:nth-child(3) { left: 31px; top: 32px; }
.slot-glyph b {
  position: absolute;
  top: 10px;
  right: 0;
  width: 28px;
  height: 38px;
  background: var(--ink);
  border-radius: 4px;
}

.slot-glyph::after {
  position: absolute;
  top: 28px;
  left: 57px;
  width: 16px;
  height: 1px;
  content: "";
  background: var(--coral);
}

.time-glyph {
  display: flex;
  align-items: center;
  gap: 6px;
}

.time-glyph i {
  width: 17px;
  height: 40px;
  background: var(--wash);
  border: 1px solid #93ada7;
  border-radius: 8px;
}

.time-glyph i:nth-child(2) { height: 55px; background: var(--teal-soft); }
.time-glyph i:nth-child(3) { height: 32px; }
.time-glyph i:nth-child(4) { height: 47px; background: var(--violet-soft); }

.transfer-glyph i {
  position: absolute;
  right: 0;
  width: 35px;
  height: 14px;
  background: var(--coral-soft);
  border: 1px solid var(--coral);
  border-radius: 7px;
}

.transfer-glyph i:nth-child(1) { top: 2px; }
.transfer-glyph i:nth-child(2) { top: 22px; width: 50px; }
.transfer-glyph i:nth-child(3) { top: 42px; width: 42px; }

.transfer-glyph::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 28px;
  height: 56px;
  content: "";
  background: var(--ink);
  border-radius: 4px;
}

.transfer-glyph::after {
  position: absolute;
  top: 28px;
  left: 28px;
  width: 22px;
  height: 1px;
  content: "";
  background: var(--coral);
}

.research-figure {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 7px;
}

.architecture-figure {
  max-width: 680px;
  margin-inline: auto;
  box-shadow: 0 15px 50px rgba(18, 50, 58, 0.07);
}

.figure-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 82px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.figure-topline > div > span,
.research-figure figcaption > span {
  display: block;
  margin-bottom: 4px;
  color: var(--coral);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.figure-topline h3 {
  font-family: var(--serif);
  font-size: 1.17rem;
  font-weight: 400;
}

.zoom-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  color: var(--teal-dark);
  font-size: 0.72rem;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
}

.zoom-link svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.4;
}

.zoom-link:hover {
  text-decoration: underline;
}

.figure-image-link {
  position: relative;
  display: block;
  padding: 20px;
  background: #fff;
}

.architecture-figure .figure-image-link {
  padding: 20px;
}

.figure-image-link img {
  width: 100%;
  height: auto;
}

.figure-hover-label {
  position: absolute;
  right: 25px;
  bottom: 25px;
  padding: 7px 10px;
  color: var(--white);
  background: rgba(16, 47, 57, 0.9);
  border-radius: 3px;
  font-size: 0.68rem;
  font-weight: 700;
  opacity: 0;
  transform: translateY(5px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.figure-image-link:hover .figure-hover-label,
.figure-image-link:focus-visible .figure-hover-label {
  opacity: 1;
  transform: translateY(0);
}

.research-figure figcaption {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 20px;
  padding: 18px 20px;
  color: var(--muted);
  background: #f7f7f3;
  border-top: 1px solid var(--line);
  font-size: calc(0.8rem + 2px);
  line-height: 1.55;
}

.method-details {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 1120px;
  margin: 38px auto 0;
  border-block: 1px solid var(--line);
}

.method-details article {
  padding: 25px 22px;
}

.method-details article + article {
  border-left: 1px solid var(--line);
}

.method-details p:last-child {
  margin-top: 7px;
  color: var(--muted);
  font-size: calc(0.76rem + 2px);
  line-height: 1.5;
}

.method-details strong {
  color: var(--ink-2);
}

.detail-value {
  color: var(--teal-dark);
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.1vw, 1.9rem);
  line-height: 1;
}

/* Scaling */

.section-scaling {
  background: var(--wash-blue);
  border-block: 1px solid var(--line);
}

.scaling-layout {
  display: grid;
  grid-template-columns: minmax(380px, 0.78fr) minmax(0, 1.22fr);
  align-items: start;
  gap: clamp(38px, 6vw, 82px);
}

.scaling-lead {
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: 1.22rem;
  line-height: 1.55;
}

.equation-card {
  margin-top: 30px;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.equation-row {
  padding: 24px 25px 26px;
}

.equation-row + .equation-row {
  border-top: 1px solid var(--line);
}

.equation-label {
  margin-bottom: 15px;
  color: var(--teal-dark);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.equation {
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.13rem, 1.6vw, 1.5rem);
  line-height: 1.7;
}

.equation-fitted {
  font-size: clamp(0.95rem, 1.12vw, 1.08rem);
}

.equation var {
  font-family: inherit;
}

.equation sup,
.equation sub,
.equation-note sup,
.equation-note sub {
  line-height: 0;
}

.fraction {
  display: inline-grid;
  grid-template-rows: auto auto;
  min-width: 2.25em;
  margin-inline: 0.14em;
  vertical-align: middle;
  line-height: 1.12;
  text-align: center;
}

.fraction > span:first-child {
  padding: 0 0.2em 0.12em;
  border-bottom: 1px solid currentColor;
}

.fraction > span:last-child {
  padding-top: 0.1em;
}

.equation-note {
  margin-top: 14px;
  color: var(--muted);
  font-size: calc(0.72rem + 2px);
  line-height: 1.6;
}

.scaling-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 24px;
  border-block: 1px solid var(--line-dark);
}

.scaling-summary article {
  padding: 19px 16px 20px 0;
}

.scaling-summary article + article {
  padding-right: 0;
  padding-left: 19px;
  border-left: 1px solid var(--line);
}

.scaling-summary strong {
  display: block;
  color: var(--teal-dark);
  font-family: var(--serif);
  font-size: 1.42rem;
  font-weight: 400;
}

.scaling-summary span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: calc(0.7rem + 2px);
  line-height: 1.5;
}

.scaling-caveat {
  margin-top: 25px;
  padding-left: 14px;
  color: var(--muted);
  border-left: 2px solid var(--coral);
  font-size: calc(0.76rem + 2px);
  line-height: 1.65;
}

.scaling-caveat strong {
  color: var(--ink-2);
}

.scaling-figure {
  box-shadow: 0 15px 50px rgba(18, 50, 58, 0.07);
}

.scaling-figure .figure-image-link {
  display: grid;
  place-items: center;
  min-height: 380px;
  padding: 18px;
}

.scaling-figure .figure-image-link img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

/* Pretraining data */

.section-pretraining {
  background: var(--canvas);
  border-top: 1px solid var(--line);
}

.pretraining-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(55px, 8vw, 115px);
  align-items: start;
}

.subsection-label {
  margin-bottom: 14px;
  color: var(--teal-dark);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.corpus-list,
.recipe-list {
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--line-dark);
  list-style: none;
}

.corpus-list li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.corpus-index,
.task-index {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 0.64rem;
}

.corpus-name strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 400;
  line-height: 1.2;
}

.corpus-name small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: calc(0.68rem + 2px);
  line-height: 1.4;
}

.corpus-scale {
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-align: right;
}

.recipe-list li {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 18px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.recipe-list strong {
  color: var(--ink-2);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.recipe-list p {
  color: var(--muted);
  font-size: calc(0.78rem + 2px);
  line-height: 1.55;
}

.mask-bank {
  margin-top: clamp(50px, 6vw, 78px);
}

.mask-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line-dark);
}

.mask-grid div {
  min-height: 108px;
  padding: 21px 24px;
}

.mask-grid div + div {
  border-left: 1px solid var(--line);
}

.mask-grid strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 400;
}

.mask-grid span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: calc(0.72rem + 2px);
  line-height: 1.45;
}

.pretraining-note,
.transfer-note {
  max-width: 930px;
  margin-top: 22px;
  padding-left: 14px;
  color: var(--muted);
  border-left: 2px solid var(--coral);
  font-size: calc(0.76rem + 2px);
  line-height: 1.65;
}

/* Missing-data imputation */

.section-imputation {
  background: linear-gradient(180deg, #edf3f0 0%, var(--paper) 42%);
  border-top: 1px solid var(--line);
}

.imputation-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.68fr) minmax(0, 1.32fr);
  gap: clamp(42px, 6vw, 82px);
  align-items: start;
}

.imputation-copy {
  position: sticky;
  top: calc(var(--nav-height) + 30px);
}

.imputation-lead {
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: 1.18rem;
  line-height: 1.58;
}

.imputation-masks {
  margin-top: 30px;
  border-block: 1px solid var(--line-dark);
}

.imputation-masks article {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 14px;
  padding: 19px 0;
}

.imputation-masks article + article {
  border-top: 1px solid var(--line);
}

.imputation-masks article > span {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  color: var(--coral);
  background: var(--coral-soft);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: -0.1em;
}

.imputation-masks strong {
  color: var(--ink);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.imputation-masks p {
  margin-top: 4px;
  color: var(--muted);
  font-size: calc(0.74rem + 2px);
  line-height: 1.5;
}

.imputation-result {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
  margin-top: 28px;
  padding: 21px 22px;
  color: var(--white);
  background: var(--teal-dark);
  border-radius: 6px;
}

.imputation-result strong {
  font-family: var(--serif);
  font-size: 1.65rem;
  font-weight: 400;
  white-space: nowrap;
}

.imputation-result p {
  color: rgba(255, 255, 255, 0.78);
  font-size: calc(0.7rem + 2px);
  line-height: 1.45;
}

.imputation-facilities {
  margin-top: 28px;
}

.imputation-facilities .subsection-label {
  margin-bottom: 7px;
}

.imputation-facilities > p:last-child {
  color: var(--muted);
  font-size: calc(0.73rem + 2px);
  line-height: 1.65;
}

.imputation-facilities span {
  margin-inline: 5px;
  color: var(--coral);
}

.imputation-figure {
  box-shadow: 0 18px 55px rgba(18, 50, 58, 0.09);
}

.imputation-figure .figure-image-link {
  padding: 14px;
  background: #eef3f0;
}

.imputation-figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  transition: opacity 150ms ease;
}

.imputation-figure img.is-loading {
  opacity: 0.35;
}

.imputation-selector {
  padding: 14px 16px;
  background: #f7f7f3;
  border-bottom: 1px solid var(--line);
}

.imputation-selector-row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.imputation-selector-row + .imputation-selector-row {
  margin-top: 9px;
}

.imputation-selector-row > p {
  padding-top: 7px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.imputation-button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.imputation-button-group button {
  min-height: 30px;
  padding: 6px 10px;
  color: var(--teal-dark);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 3px;
  font: 700 0.64rem/1.2 var(--sans);
  letter-spacing: 0.025em;
  cursor: pointer;
  transition: color 140ms ease, background 140ms ease, border-color 140ms ease;
}

.imputation-button-group button span {
  margin-left: 3px;
  color: var(--muted);
  font-weight: 500;
}

.imputation-button-group button:hover:not(:disabled) {
  border-color: var(--teal);
}

.imputation-button-group button[aria-pressed="true"] {
  color: var(--white);
  background: var(--teal-dark);
  border-color: var(--teal-dark);
}

.imputation-button-group button[aria-pressed="true"] span {
  color: rgba(255, 255, 255, 0.72);
}

.imputation-button-group button:disabled {
  color: var(--faint);
  background: transparent;
  cursor: not-allowed;
  opacity: 0.55;
}

.imputation-stepper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 16px;
  background: var(--white);
  border-top: 1px solid var(--line);
}

.imputation-stepper > p strong,
.imputation-stepper > p span {
  display: block;
}

.imputation-stepper > p strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 400;
}

.imputation-stepper > p span {
  margin-top: 1px;
  color: var(--muted);
  font-size: calc(0.66rem + 2px);
}

.imputation-stepper > div {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 9px;
}

.imputation-stepper button {
  display: grid;
  width: 32px;
  height: 32px;
  padding: 0;
  place-items: center;
  color: var(--teal-dark);
  background: var(--teal-soft);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}

.imputation-stepper button:hover {
  color: var(--white);
  background: var(--teal-dark);
}

.imputation-stepper output {
  min-width: 50px;
  color: var(--teal-dark);
  font-family: var(--mono);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-align: center;
}

/* Fault and cavity identification */

.section-identification {
  background: var(--canvas);
  border-top: 1px solid var(--line);
}

.identification-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 0.65fr);
  gap: clamp(42px, 6vw, 82px);
  align-items: start;
  max-width: 1120px;
  margin-inline: auto;
}

.identification-figure {
  width: 100%;
  max-width: 620px;
  box-shadow: 0 18px 55px rgba(18, 50, 58, 0.08);
}

.identification-figure .figure-image-link {
  padding: 16px;
}

.identification-figure img {
  width: 100%;
  height: auto;
}

.identification-lead {
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: 1.18rem;
  line-height: 1.6;
}

.identification-results {
  margin-top: 30px;
  border-block: 1px solid var(--line-dark);
}

.identification-results article {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 18px;
  align-items: center;
  padding: 19px 0;
}

.identification-results article + article {
  border-top: 1px solid var(--line);
}

.identification-results strong {
  color: var(--teal-dark);
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 400;
  line-height: 1;
  white-space: nowrap;
}

.identification-results span {
  color: var(--muted);
  font-size: calc(0.73rem + 2px);
  line-height: 1.48;
}

.cavity-result {
  margin-top: 30px;
  padding: 22px 24px 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--coral);
  border-radius: 5px;
}

.cavity-result .subsection-label {
  margin-bottom: 5px;
}

.cavity-result h3 {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
}

.cavity-result > p:last-child {
  margin-top: 8px;
  color: var(--muted);
  font-size: calc(0.76rem + 2px);
  line-height: 1.58;
}

.cavity-result strong {
  color: var(--ink-2);
}

/* Downstream tasks */

.section-tasks {
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.task-pathways {
  border-top: 1px solid var(--line-dark);
}

.task-pathways article {
  display: grid;
  grid-template-columns: 38px minmax(210px, 0.72fr) minmax(0, 1.2fr) minmax(170px, 0.52fr);
  gap: clamp(22px, 3.6vw, 52px);
  align-items: start;
  padding: 32px 0 35px;
  border-bottom: 1px solid var(--line);
}

.task-mode {
  margin-bottom: 8px;
  color: var(--teal-dark);
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
}

.task-heading h3 {
  font-family: var(--serif);
  font-size: 1.38rem;
  font-weight: 400;
  line-height: 1.15;
}

.task-description {
  color: var(--muted);
  font-size: calc(0.82rem + 2px);
  line-height: 1.65;
}

.task-outcome {
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.task-outcome strong {
  display: block;
  color: var(--teal-dark);
  font-family: var(--serif);
  font-size: 1.42rem;
  font-weight: 400;
  line-height: 1.1;
}

.task-outcome span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: calc(0.68rem + 2px);
  line-height: 1.45;
}

.transfer-note {
  margin-top: 28px;
}

.transfer-note strong {
  color: var(--ink-2);
}

/* Footer */

.site-footer {
  color: #a8bcb8;
  background: #0a252d;
}

.footer-main {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 50px;
  padding-block: 65px;
}

.footer-mark {
  color: var(--white);
  font-family: var(--serif);
  font-size: 2rem;
  text-decoration: none;
}

.footer-main > div:first-child p {
  max-width: 450px;
  margin-top: 10px;
  font-size: calc(0.78rem + 2px);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 24px;
}

.footer-links a {
  color: #c7d8d5;
  font-size: 0.72rem;
  font-weight: 700;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--white);
}

.footer-meta {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding-block: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  font-size: calc(0.68rem + 2px);
}

/* Lightbox */

.lightbox {
  width: min(94vw, 1500px);
  max-width: none;
  height: min(92vh, 1100px);
  max-height: none;
  margin: auto;
  padding: 0;
  overflow: hidden;
  color: var(--white);
  background: #0c242b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  box-shadow: 0 25px 90px rgba(0, 0, 0, 0.46);
}

.lightbox::backdrop {
  background: rgba(5, 20, 25, 0.88);
  backdrop-filter: blur(5px);
}

.lightbox[open] {
  display: grid;
  grid-template-rows: 58px 1fr;
}

.lightbox-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 0 18px 0 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.lightbox-toolbar p {
  overflow: hidden;
  font-family: var(--serif);
  font-size: 1rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lightbox-close {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px;
  color: #d5e2df;
  background: transparent;
  border: 0;
  cursor: pointer;
  font: 700 0.68rem var(--sans);
  text-transform: uppercase;
}

.lightbox-close svg {
  width: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.4;
}

.lightbox-stage {
  overflow: auto;
  padding: 24px;
  overscroll-behavior: contain;
}

.lightbox-stage img {
  width: auto;
  max-width: none;
  min-width: min(1200px, 100%);
  height: auto;
  margin-inline: auto;
  background: var(--white);
}

/* Responsive */

@media (max-width: 1120px) {
  .container {
    width: min(var(--container), calc(100% - 52px));
  }

  .site-header {
    min-height: auto;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(420px, 0.75fr);
    min-height: 820px;
    gap: 35px;
    padding-block: 60px 85px;
  }

  h1 {
    font-size: clamp(calc(2.975rem - 2px), calc(5.8vw - 4px), calc(4.675rem - 2px));
  }

  .hero-figure {
    padding: 10px 10px 8px;
  }

  .glance-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .flow-arrow {
    display: none;
  }

  .glance-card,
  .glance-card:first-child,
  .glance-card:last-child {
    border-radius: 8px;
  }

  .method-sequence {
    grid-template-columns: 1fr 1fr;
  }

  .method-sequence article:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .method-sequence article:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .pretraining-grid {
    gap: 52px;
  }

  .task-pathways article {
    grid-template-columns: 32px minmax(200px, 0.75fr) minmax(0, 1fr);
    gap: 22px 32px;
  }

  .task-outcome {
    grid-column: 2 / -1;
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 15px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .task-outcome span {
    margin-top: 0;
  }

}

@media (max-width: 850px) {
  :root {
    --nav-height: 60px;
  }

  .container {
    width: min(var(--container), calc(100% - 36px));
  }

  .site-header {
    padding-bottom: 30px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
    padding-block: 55px 70px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .venue-line {
    margin-bottom: 45px;
  }

  h1 {
    max-width: 690px;
    font-size: clamp(calc(3.075rem - 2px), calc(8vw - 4px), calc(4.375rem - 2px));
  }

  .hero-figure {
    min-width: 0;
    width: min(100%, 650px);
    margin: 15px auto 0;
  }

  .scroll-cue {
    display: none;
  }

  .nav-inner {
    width: 100%;
  }

  .nav-mark,
  .nav-paper {
    display: none;
  }

  .nav-links {
    justify-content: flex-start;
    width: 100%;
    overflow-x: auto;
    padding-inline: 18px;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .split-intro {
    grid-template-columns: 1fr;
    gap: 27px;
  }

  .accelerator-figure-heading {
    display: grid;
    align-items: start;
    justify-content: stretch;
    gap: 15px;
  }

  .accelerator-legend {
    justify-content: flex-start;
  }

  .diagram-scroll-hint {
    display: block;
  }

  .accelerator-context-grid {
    grid-template-columns: 1fr;
    gap: 58px;
  }

  .accelerator-scale-note {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .accelerator-scale-note h3 {
    max-width: 540px;
  }

  .scaling-layout {
    grid-template-columns: 1fr;
  }

  .scaling-copy {
    max-width: 720px;
  }

  .editorial-grid {
    grid-template-columns: 1fr;
    gap: 35px;
  }

  .section-rail {
    max-width: 560px;
  }

  .section-rail .eyebrow {
    margin-bottom: 10px;
  }

  .glance-flow {
    grid-template-columns: minmax(0, 1fr);
  }

  .glance-card {
    min-height: 0;
  }

  .glance-card.featured {
    transform: none;
  }

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

  .challenge-list article:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .method-details {
    grid-template-columns: 1fr 1fr;
  }

  .method-details article:nth-child(3) {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .method-details article:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .pretraining-grid {
    grid-template-columns: 1fr;
    gap: 58px;
  }

  .imputation-layout {
    grid-template-columns: 1fr;
  }

  .imputation-copy {
    position: static;
    max-width: 720px;
  }

  .imputation-figure {
    width: min(100%, 760px);
    margin-inline: auto;
  }

  .identification-layout {
    grid-template-columns: 1fr;
  }

  .identification-copy {
    max-width: 760px;
  }

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

  .mask-grid div:nth-child(3) {
    border-left: 0;
  }

  .mask-grid div:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .task-pathways article {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 17px 18px;
  }

  .task-index {
    grid-row: 1 / span 3;
  }

  .task-heading,
  .task-description,
  .task-outcome {
    grid-column: 2;
  }

  .task-outcome {
    display: block;
  }

  .task-outcome span {
    margin-top: 6px;
  }
}

@media (max-width: 580px) {
  .container {
    width: calc(100vw - 28px);
    max-width: var(--container);
  }

  body {
    font-size: 15px;
  }

  h2 {
    font-size: clamp(2rem, 8.5vw, 2.65rem);
    line-height: 1.08;
  }

  .section {
    padding-block: 80px;
  }

  .site-header {
    padding-bottom: 0;
  }

  .hero-grid {
    padding-block: 35px 55px;
  }

  .venue-line {
    margin-bottom: 34px;
    font-size: 0.72rem;
  }

  h1 {
    font-size: clamp(calc(2.625rem - 2px), calc(13.5vw - 4px), calc(3.625rem - 2px));
  }

  .hero-claim {
    margin-top: 17px;
    font-size: 0.65rem;
  }

  .hero-dek {
    margin-top: 14px;
    font-size: 1rem;
  }

  .authors {
    display: block;
  }

  .authors > * {
    display: block;
  }

  .authors span[aria-hidden] {
    display: none;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-actions .button:last-child {
    grid-column: auto;
  }

  .button {
    padding-inline: 12px;
    font-size: 0.75rem;
  }

  .resource-qualifier {
    font-size: calc(0.7rem + 2px);
  }

  .hero-figure {
    margin-top: 4px;
    padding: 5px;
    border-radius: 8px;
  }

  .hero-figure figcaption {
    padding-inline: 8px;
    font-size: calc(0.72rem + 2px);
  }

  .nav-links {
    gap: 22px;
  }

  .nav-links a {
    font-size: 0.66rem;
  }

  .section-intro {
    margin-bottom: 50px;
  }

  .accelerator-figure-heading {
    padding: 18px;
  }

  .accelerator-figure-heading h3,
  .context-heading {
    font-size: 1.26rem;
  }

  .accelerator-legend {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 14px;
  }

  .accelerator-diagram {
    min-width: 820px;
  }

  .accelerator-figure figcaption {
    padding: 15px 18px 17px;
    font-size: calc(0.78rem + 2px);
  }

  .accelerator-context-grid {
    margin-top: 58px;
  }

  .accelerator-scale-note {
    margin-top: 42px;
    padding-block: 25px;
  }

  .accelerator-scale-copy {
    gap: 12px;
    font-size: 0.94rem;
    line-height: 1.7;
  }

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

  .application-list article,
  .application-list article:nth-child(even) {
    padding: 18px 0 20px;
    border-left: 0;
  }

  .facility-list li {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .glance-card {
    min-height: 0;
    padding: 25px;
    overflow-wrap: anywhere;
  }

  .section-glance .section-intro-wide h2 {
    font-size: clamp(1.9rem, 8vw, 2.25rem);
    max-width: calc(100vw - 28px);
    overflow-wrap: anywhere;
    text-wrap: pretty;
  }

  .section-glance .glance-flow,
  .section-glance .glance-card {
    width: 100%;
    max-width: calc(100vw - 28px);
  }

  .glance-icon {
    margin-bottom: 24px;
  }

  .lead {
    margin-top: 28px;
    font-size: 1.3rem;
  }

  .challenge-list {
    margin-top: 50px;
  }

  .challenge-list article {
    padding-right: 0;
  }

  .method-sequence {
    grid-template-columns: 1fr;
  }

  .method-sequence article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .method-sequence article {
    min-height: 260px;
  }

  .figure-topline {
    align-items: flex-start;
    padding: 14px;
  }

  .figure-topline h3 {
    font-size: 1rem;
  }

  .zoom-link {
    font-size: 0;
  }

  .zoom-link svg {
    width: 22px;
  }

  .architecture-figure .figure-image-link,
  .figure-image-link {
    padding: 10px;
  }

  .research-figure figcaption {
    grid-template-columns: 1fr;
    gap: 5px;
    padding: 15px;
  }

  .figure-hover-label {
    display: none;
  }

  .method-details {
    grid-template-columns: 1fr;
  }

  .method-details article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .equation-row {
    padding: 20px 18px 22px;
  }

  .equation,
  .equation-fitted {
    font-size: 1rem;
  }

  .scaling-summary {
    grid-template-columns: 1fr;
  }

  .scaling-summary article + article {
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .scaling-figure .figure-image-link {
    min-height: 0;
  }

  .corpus-list li {
    grid-template-columns: 26px minmax(0, 1fr);
    gap: 12px;
    padding: 16px 0;
  }

  .corpus-scale {
    grid-column: 2;
    text-align: left;
  }

  .recipe-list li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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

  .mask-grid div {
    min-height: 0;
    padding: 18px 0;
  }

  .mask-grid div + div,
  .mask-grid div:nth-child(3) {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .imputation-result {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .imputation-figure .figure-image-link {
    padding: 6px;
  }

  .imputation-selector {
    padding: 12px;
  }

  .imputation-selector-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .imputation-selector-row > p {
    padding-top: 0;
  }

  .imputation-button-group button {
    padding-inline: 9px;
  }

  .imputation-stepper {
    gap: 10px;
    padding-inline: 12px;
  }

  .identification-figure .figure-image-link {
    padding: 6px;
  }

  .identification-results article {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .task-pathways article {
    grid-template-columns: 25px minmax(0, 1fr);
    padding: 26px 0 29px;
  }

  .task-heading h3 {
    font-size: 1.24rem;
  }

  .task-outcome strong {
    font-size: 1.28rem;
  }

  .footer-main,
  .footer-meta {
    display: block;
  }

  .footer-links {
    justify-content: flex-start;
    margin-top: 35px;
  }

  .footer-meta p + p {
    margin-top: 5px;
  }

  .lightbox {
    width: 96vw;
    height: 94vh;
  }

  .lightbox-stage {
    padding: 10px;
  }

  .lightbox-stage img {
    min-width: 950px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .section-nav,
  .scroll-cue,
  .zoom-link,
  .lightbox {
    display: none !important;
  }

  .site-header,
  .site-footer {
    color: #111;
    background: #fff;
  }

  .section {
    padding-block: 40px;
    break-inside: avoid;
  }
}