:root {
  color-scheme: light;
  --bg: oklch(97% 0.009 225);
  --bg-soft: oklch(94% 0.012 225);
  --ink: oklch(19% 0.018 232);
  --ink-muted: oklch(41% 0.024 232);
  --ink-faint: oklch(58% 0.02 232);
  --rule: oklch(84% 0.016 232);
  --surface: oklch(99% 0.006 225);
  --surface-strong: oklch(91% 0.018 232);
  --blue: oklch(58% 0.19 240);
  --blue-dark: oklch(43% 0.16 242);
  --cyan: oklch(68% 0.16 205);
  --violet: oklch(55% 0.12 285);
  --dark: oklch(18% 0.026 238);
  --dark-2: oklch(23% 0.03 238);
  --dark-ink: oklch(93% 0.012 225);
  --dark-muted: oklch(75% 0.018 225);
  --shadow: 0 24px 70px oklch(35% 0.06 240 / 0.14);
  --shadow-quiet: 0 14px 44px oklch(35% 0.05 240 / 0.11);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 80% 4%, oklch(84% 0.075 220 / 0.52), transparent 28rem),
    linear-gradient(180deg, var(--bg), oklch(96% 0.013 232));
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  font-kerning: normal;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

button,
input {
  font: inherit;
}

.skip-link {
  position: fixed;
  inset: var(--space-sm) auto auto var(--space-sm);
  z-index: 10;
  padding: var(--space-sm) var(--space-md);
  background: var(--ink);
  color: var(--surface);
  transform: translateY(-140%);
  transition: transform 180ms ease-out;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 76px;
  margin: 0 auto;
  padding: var(--space-md) max(1rem, calc((100% - var(--max)) / 2));
  border-bottom: 1px solid oklch(86% 0.015 232 / 0.68);
  background: oklch(97% 0.009 225 / 0.84);
  backdrop-filter: blur(18px) saturate(1.12);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  gap: var(--space-sm);
}

.brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid var(--rule);
  background: var(--ink);
  color: var(--surface);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1rem;
  font-weight: 780;
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.brand small {
  color: var(--ink-muted);
  font-size: 0.78rem;
}

.site-nav {
  display: none;
  align-items: center;
  gap: clamp(1rem, 2vw, 2rem);
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.site-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

.site-nav a {
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  inset: auto 0 8px;
  height: 1px;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms var(--ease-out);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.section {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.hero {
  display: grid;
  min-height: min(860px, calc(100svh - 76px));
  align-items: center;
  gap: var(--space-2xl);
  padding-top: clamp(2rem, 5vw, 5rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
}

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

.eyebrow {
  color: var(--blue-dark);
  font-size: 0.78rem;
  font-weight: 780;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1,
h2 {
  max-width: 12ch;
  margin-top: var(--space-sm);
  font-size: clamp(3rem, 8vw, 6.8rem);
  font-weight: 760;
  letter-spacing: 0;
  line-height: 0.92;
  text-wrap: balance;
}

h2 {
  max-width: 13ch;
  font-size: clamp(2.35rem, 5.8vw, 5rem);
  line-height: 0.98;
}

h3 {
  font-size: 1.03rem;
  font-weight: 760;
  line-height: 1.2;
  text-wrap: balance;
}

.hero-statement {
  max-width: 54ch;
  margin-top: var(--space-xl);
  color: var(--ink);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-weight: 680;
  line-height: 1.28;
  text-wrap: pretty;
}

.hero-body,
.section-heading p,
.long-copy,
.final-cta p {
  max-width: 64ch;
  color: var(--ink-muted);
  font-size: 1.08rem;
}

.hero-body {
  margin-top: var(--space-md);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.button {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.78rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 0;
  font-weight: 740;
  line-height: 1.1;
  transition:
    transform 180ms var(--ease-quint),
    background 180ms ease-out,
    border-color 180ms ease-out,
    color 180ms ease-out;
}

.button::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, oklch(100% 0 0 / 0.18), transparent);
  transform: translateX(-120%);
  transition: transform 520ms var(--ease-out);
}

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

.button-secondary {
  border-color: var(--rule);
  background: oklch(100% 0.004 225 / 0.72);
  color: var(--ink);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button:hover::after,
.button:focus-visible::after {
  transform: translateX(120%);
}

.button:active {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid oklch(72% 0.16 215 / 0.72);
  outline-offset: 4px;
}

.hero-visual {
  position: relative;
  min-height: 430px;
  overflow: hidden;
  border: 1px solid var(--rule);
  background:
    linear-gradient(90deg, oklch(96% 0.014 225 / 0.9) 0 51.5%, oklch(90% 0.018 232 / 0.58) 51.5% 52%, transparent 52%),
    linear-gradient(135deg, oklch(99% 0.006 225 / 0.94), oklch(92% 0.025 232 / 0.9)),
    var(--surface);
  box-shadow:
    var(--shadow),
    inset 0 1px 0 oklch(100% 0.006 225 / 0.85),
    inset 0 -1px 0 oklch(72% 0.018 232 / 0.28);
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: linear-gradient(115deg, transparent, black 35%, black 68%, transparent);
  opacity: 0.42;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      -42deg,
      transparent 0 15px,
      oklch(28% 0.025 232 / 0.035) 15px 16px,
      transparent 16px 32px
    );
  opacity: 0.55;
  pointer-events: none;
}

.signal-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.signal-field-lineart span {
  position: absolute;
  width: clamp(46px, 7vw, 82px);
  height: 1px;
  background: oklch(27% 0.022 232 / 0.38);
  transform-origin: left center;
  animation: constructionSweep 5.8s var(--ease-out) infinite;
  animation-delay: calc(var(--i, 0) * -520ms);
}

.signal-field-lineart span:nth-child(1) { --i: 1; left: 8%; top: 22%; transform: rotate(-9deg); }
.signal-field-lineart span:nth-child(2) { --i: 2; left: 16%; top: 69%; transform: rotate(12deg); }
.signal-field-lineart span:nth-child(3) { --i: 3; left: 34%; top: 31%; transform: rotate(4deg); }
.signal-field-lineart span:nth-child(4) { --i: 4; left: 55%; top: 17%; transform: rotate(90deg); }
.signal-field-lineart span:nth-child(5) { --i: 5; left: 70%; top: 66%; transform: rotate(-6deg); }
.signal-field-lineart span:nth-child(6) { --i: 6; left: 82%; top: 38%; transform: rotate(8deg); }

.visual-system-label,
.visual-readout {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  border: 1px solid oklch(78% 0.018 232);
  background: oklch(99% 0.006 225 / 0.86);
  box-shadow: var(--shadow-quiet);
  color: var(--ink-muted);
  font-size: 0.76rem;
  font-weight: 720;
}

.visual-system-label {
  inset: var(--space-lg) auto auto var(--space-lg);
  padding: 0.55rem 0.68rem;
}

.visual-system-label span {
  color: var(--blue-dark);
}

.visual-system-label strong {
  color: var(--ink);
}

.visual-readout {
  inset: auto var(--space-lg) 5.1rem auto;
  padding: 0.5rem 0.65rem;
}

.visual-readout span {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  white-space: nowrap;
}

.visual-readout span::before {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  background: var(--cyan);
  transform: rotate(45deg);
}

.rdd-diagram {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  isolation: isolate;
}

.diagram-grid path {
  fill: none;
  stroke: oklch(73% 0.017 232);
  stroke-width: 1;
  opacity: 0.34;
}

.diagram-zone-labels {
  fill: oklch(38% 0.022 232 / 0.74);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: 0.12em;
}

.diagram-fuzzy {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.diagram-fuzzy circle {
  fill: oklch(97% 0.022 225);
  stroke: oklch(43% 0.09 234);
  stroke-width: 2;
  animation: pointBreathe 3.8s var(--ease-out) infinite;
  transform-box: fill-box;
  transform-origin: center;
}

.fuzzy-line {
  stroke: url("#discoveryInk");
  stroke-width: 3.2;
  stroke-dasharray: 0.025 0.025;
  opacity: 0.62;
  animation: fuzzyDrift 7s linear infinite;
}

.fuzzy-line-b {
  stroke-width: 2;
  opacity: 0.42;
  animation-duration: 6.2s;
  animation-direction: reverse;
}

.fuzzy-line-c {
  stroke: oklch(28% 0.022 232 / 0.48);
  stroke-width: 1.6;
  stroke-dasharray: 0.012 0.034;
  animation-duration: 8.4s;
}

.discovery-thread {
  stroke: oklch(21% 0.024 232);
  stroke-width: 4.5;
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
  animation: flowTrace 2.8s var(--ease-out) 240ms both;
}

.diagram-artifacts rect {
  fill: oklch(99% 0.006 225 / 0.88);
  stroke: oklch(27% 0.022 232 / 0.66);
  stroke-width: 1.6;
}

.diagram-artifacts path,
.engine-ticks {
  fill: none;
  stroke: oklch(27% 0.022 232 / 0.58);
  stroke-width: 1.5;
  stroke-linecap: square;
}

.diagram-flow {
  fill: none;
  stroke: oklch(20% 0.02 232);
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
  animation: flowTrace 2s var(--ease-out) 1.4s both;
}

.diagram-freeze-gate {
  filter: drop-shadow(0 16px 18px oklch(24% 0.03 232 / 0.13));
}

.gate-plate {
  fill: oklch(93% 0.025 232);
  stroke: oklch(19% 0.02 232);
  stroke-width: 2.8;
}

.gate-hatch {
  fill: url("#engineHatch");
  stroke: oklch(43% 0.14 224);
  stroke-width: 2;
  opacity: 0.92;
}

.gate-core-line {
  fill: none;
  stroke: oklch(17% 0.022 232);
  stroke-width: 2.5;
  stroke-dasharray: 1;
  animation: gateScan 2.8s var(--ease-out) 1.9s both infinite;
}

.gate-lock {
  fill: none;
  stroke: oklch(17% 0.022 232);
  stroke-width: 2;
  stroke-linecap: square;
  animation: gateLock 4.6s var(--ease-out) infinite;
  transform-box: fill-box;
  transform-origin: center;
}

.gate-lock-2 {
  animation-delay: 160ms;
}

#engineHatch path {
  stroke: oklch(38% 0.06 225 / 0.56);
  stroke-width: 1;
}

.production-flow {
  fill: none;
  stroke: oklch(20% 0.022 232);
  stroke-width: 2.5;
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
  animation: flowTrace 1.8s var(--ease-out) 2.25s both;
}

.production-flow-b {
  animation-delay: 2.45s;
}

.production-flow-c {
  animation-delay: 2.65s;
}

.diagram-engine {
  fill: none;
  stroke-linejoin: round;
}

.engine-module {
  fill: oklch(99% 0.006 225);
  stroke: oklch(17% 0.022 232);
  stroke-width: 2.4;
  animation: moduleSettle 4.8s var(--ease-out) infinite;
  transform-box: fill-box;
  transform-origin: center;
}

.engine-module:nth-child(2) {
  animation-delay: 180ms;
}

.engine-module:nth-child(3) {
  animation-delay: 360ms;
}

.engine-hatch-fill {
  fill: url("#engineHatch");
  stroke: oklch(17% 0.022 232);
  stroke-width: 1.4;
}

.engine-bus {
  fill: none;
  stroke: oklch(17% 0.022 232);
  stroke-width: 2;
}

.engine-port {
  fill: oklch(94% 0.025 224);
  stroke: oklch(43% 0.14 224);
  stroke-width: 2;
  animation: portPulse 3.6s var(--ease-out) infinite;
  transform-box: fill-box;
  transform-origin: center;
}

.diagram-labels {
  fill: var(--ink-muted);
  font-size: 14px;
  font-weight: 720;
}

.signal-field span {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--blue);
  opacity: 0.22;
  animation: signalPulse 4.8s var(--ease-out) infinite;
  animation-delay: calc(var(--i, 0) * -320ms);
}

.signal-field span:nth-child(1) { --i: 1; left: 10%; top: 18%; }
.signal-field span:nth-child(2) { --i: 2; left: 21%; top: 64%; }
.signal-field span:nth-child(3) { --i: 3; left: 31%; top: 24%; }
.signal-field span:nth-child(4) { --i: 4; left: 42%; top: 72%; }
.signal-field span:nth-child(5) { --i: 5; left: 54%; top: 31%; }
.signal-field span:nth-child(6) { --i: 6; left: 62%; top: 55%; }
.signal-field span:nth-child(7) { --i: 7; left: 75%; top: 18%; }
.signal-field span:nth-child(8) { --i: 8; left: 84%; top: 68%; }
.signal-field span:nth-child(9) { --i: 9; left: 14%; top: 82%; }
.signal-field span:nth-child(10) { --i: 10; left: 92%; top: 39%; }
.signal-field span:nth-child(11) { --i: 11; left: 46%; top: 12%; }
.signal-field span:nth-child(12) { --i: 12; left: 68%; top: 83%; }

.diagram-grid path {
  fill: none;
  stroke: oklch(78% 0.018 232);
  stroke-width: 1;
  opacity: 0.45;
}

.diagram-noise circle {
  fill: var(--ink-faint);
  opacity: 0.42;
}

.diagram-flow {
  fill: none;
  stroke: url("#signalLine");
  stroke-width: 6;
  stroke-linecap: round;
  filter: url("#softGlow");
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
  animation: flowTrace 3.6s var(--ease-out) 420ms both;
}

.diagram-node {
  fill: var(--surface);
  stroke: var(--blue);
  stroke-width: 5;
  filter: drop-shadow(0 10px 16px oklch(58% 0.16 240 / 0.18));
}

.node-loop {
  fill: oklch(97% 0.04 220);
}

.diagram-gate {
  fill: oklch(94% 0.03 250);
  stroke: var(--violet);
  stroke-width: 3;
}

.diagram-gate-core {
  fill: var(--ink);
  opacity: 0.9;
}

.diagram-stack rect {
  fill: oklch(98% 0.01 225);
  stroke: var(--ink);
  stroke-width: 2;
  filter: drop-shadow(0 8px 10px oklch(35% 0.03 232 / 0.08));
}

.diagram-labels {
  fill: var(--ink-muted);
  font-size: 18px;
  font-weight: 720;
}

.visual-caption {
  position: absolute;
  inset: auto var(--space-lg) var(--space-lg);
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.visual-caption span {
  border: 1px solid var(--rule);
  background: oklch(99% 0.006 225 / 0.82);
  padding: 0.45rem 0.6rem;
  color: var(--ink-muted);
  font-size: 0.78rem;
  font-weight: 720;
}

.section-dark {
  width: 100%;
  max-width: none;
  margin-top: 0;
  padding-inline: max(1rem, calc((100% - var(--max)) / 2));
  background:
    linear-gradient(180deg, oklch(18% 0.026 238 / 0.3), transparent 8rem),
    radial-gradient(circle at 85% 20%, oklch(42% 0.1 240 / 0.4), transparent 28rem),
    linear-gradient(135deg, var(--dark), oklch(15% 0.022 245));
  color: var(--dark-ink);
}

.section-dark .eyebrow,
.section-dark .section-heading p {
  color: var(--dark-muted);
}

.section-heading {
  display: grid;
  gap: var(--space-md);
  max-width: 780px;
}

.section-heading p,
.long-copy p,
.hero-body,
.truth-list p,
.concept-grid p,
.use-grid p,
.lifecycle p {
  text-wrap: pretty;
}

.section-heading-wide {
  max-width: 980px;
}

.section-heading h2,
.section-dark h2 {
  margin-top: 0;
}

.contrast-table {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.contrast-column {
  border: 1px solid oklch(48% 0.035 238);
  padding: clamp(1.25rem, 4vw, 2rem);
  background:
    linear-gradient(180deg, oklch(25% 0.032 238), oklch(21% 0.026 238)),
    oklch(23% 0.03 238);
}

.contrast-column-accent {
  border-color: oklch(68% 0.16 205);
  background: oklch(25% 0.043 230);
}

.contrast-column h3 {
  color: var(--dark-ink);
  font-size: 1.25rem;
}

.contrast-column ul {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  color: var(--dark-muted);
}

.contrast-column li {
  display: flex;
  gap: var(--space-sm);
  align-items: baseline;
}

.contrast-column li::before {
  content: "";
  flex: 0 0 0.45rem;
  width: 0.45rem;
  height: 0.45rem;
  background: currentColor;
  transform: rotate(45deg);
}

.split {
  display: grid;
  gap: var(--space-2xl);
}

.core-idea {
  padding-top: clamp(5rem, 9vw, 8rem);
}

.long-copy {
  display: grid;
  gap: var(--space-md);
}

.model-section {
  border-top: 1px solid var(--rule);
}

.lifecycle {
  display: grid;
  gap: 0;
  margin-top: var(--space-2xl);
  counter-reset: stage;
  background:
    linear-gradient(90deg, transparent 0 8%, var(--rule) 8% 92%, transparent 92%) 0 4.5rem / 100% 1px no-repeat;
  border: 1px solid var(--rule);
}

.lifecycle li {
  display: grid;
  gap: var(--space-sm);
  min-height: 236px;
  padding: clamp(1.25rem, 3vw, 2rem);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background:
    linear-gradient(180deg, oklch(99% 0.006 225), oklch(96% 0.012 225)),
    var(--surface);
  transition:
    transform 220ms var(--ease-quint),
    background 220ms ease-out,
    box-shadow 220ms ease-out;
}

.lifecycle li:nth-child(3n) {
  border-right: 0;
}

.lifecycle li:nth-last-child(-n + 3) {
  border-bottom: 0;
}

.lifecycle li:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 38px oklch(35% 0.045 240 / 0.1);
}

.lifecycle span {
  color: var(--blue-dark);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.lifecycle p,
.concept-grid p,
.truth-list p,
.use-grid p,
.roadmap span,
.outcome-list span {
  color: var(--ink-muted);
}

.concept-grid,
.use-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  margin-top: var(--space-2xl);
  background: var(--rule);
  border: 1px solid var(--rule);
}

.concept-grid article,
.use-grid article {
  min-height: 180px;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: var(--surface);
}

.concept-grid h3,
.use-grid h3 {
  margin-bottom: var(--space-sm);
}

.concept-ledger {
  grid-template-columns: 1fr;
  background: transparent;
  border: 0;
  gap: 0;
}

.concept-ledger article {
  display: grid;
  grid-template-columns: 4rem minmax(10rem, 0.7fr) minmax(14rem, 1fr);
  align-items: baseline;
  min-height: auto;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--rule);
  background: transparent;
}

.concept-ledger article:last-child {
  border-bottom: 1px solid var(--rule);
}

.concept-ledger span {
  color: var(--blue-dark);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.08em;
}

.concept-ledger h3 {
  margin: 0;
}

.not-section {
  width: min(calc(100% - 2rem), calc(var(--max) + 80px));
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.truth-list {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.truth-list div {
  display: grid;
  grid-template-columns: minmax(5rem, 0.6fr) minmax(10rem, 1fr) minmax(14rem, 1.3fr);
  gap: var(--space-lg);
  align-items: baseline;
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--rule);
}

.truth-list span {
  color: var(--blue-dark);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.outcome-list,
.roadmap {
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.outcome-list div,
.roadmap div {
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-lg);
  background: var(--surface);
}

.outcome-list div {
  min-height: 156px;
  align-content: space-between;
}

.roadmap {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: var(--space-2xl);
}

.final-cta {
  width: min(calc(100% - 2rem), calc(var(--max) + 80px));
}

.cta-panel {
  display: grid;
  gap: var(--space-2xl);
  padding: clamp(1.5rem, 5vw, 4rem);
  background:
    radial-gradient(circle at 82% 20%, oklch(67% 0.16 205 / 0.2), transparent 16rem),
    linear-gradient(120deg, oklch(19% 0.026 238), oklch(25% 0.045 240)),
    var(--dark);
  color: var(--dark-ink);
}

.cta-panel h2 {
  max-width: 11ch;
}

.cta-panel p {
  color: var(--dark-muted);
  margin-top: var(--space-md);
}

.cta-panel .eyebrow {
  color: var(--cyan);
}

.signup-form {
  display: grid;
  align-content: center;
  gap: var(--space-sm);
}

.form-honeypot {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.signup-form label {
  color: var(--dark-muted);
  font-size: 0.84rem;
  font-weight: 730;
}

.form-row {
  display: grid;
  gap: var(--space-sm);
}

.signup-form input {
  width: 100%;
  min-height: 3.2rem;
  border: 1px solid oklch(48% 0.035 238);
  border-radius: 0;
  background: oklch(16% 0.022 238);
  color: var(--dark-ink);
  padding: 0.8rem 1rem;
}

.signup-form input::placeholder {
  color: oklch(68% 0.018 225);
}

.signup-form input[aria-invalid="true"] {
  border-color: oklch(67% 0.18 28);
  box-shadow: 0 0 0 3px oklch(67% 0.18 28 / 0.18);
}

.signup-form .button-primary {
  background: var(--cyan);
  color: oklch(14% 0.024 238);
}

.form-message {
  min-height: 1.4rem;
  color: var(--dark-muted);
  font-size: 0.9rem;
}

.form-message.is-error {
  color: oklch(82% 0.12 35);
}

.form-message.is-success {
  color: oklch(82% 0.13 190);
}

.workshop-link {
  justify-self: start;
  min-height: 44px;
  color: var(--dark-ink);
  font-weight: 740;
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

.site-footer {
  display: grid;
  gap: var(--space-lg);
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--rule);
  color: var(--ink-muted);
}

.site-footer strong {
  color: var(--ink);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}

.site-footer a {
  min-height: 32px;
  color: var(--ink);
  font-weight: 650;
}

.footer-note {
  max-width: 70ch;
  font-size: 0.92rem;
}

body.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 520ms var(--ease-out),
    transform 520ms var(--ease-out);
  transition-delay: calc(var(--reveal-index, 0) * 45ms);
}

body.reveal-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes flowTrace {
  from {
    stroke-dashoffset: 1;
  }

  to {
    stroke-dashoffset: 0;
  }
}

@keyframes constructionSweep {
  0%,
  100% {
    opacity: 0.12;
    scale: 0.72 1;
  }

  42% {
    opacity: 0.5;
    scale: 1 1;
  }
}

@keyframes fuzzyDrift {
  from {
    stroke-dashoffset: 0;
  }

  to {
    stroke-dashoffset: -0.4;
  }
}

@keyframes pointBreathe {
  0%,
  100% {
    opacity: 0.54;
    transform: scale(0.92);
  }

  45% {
    opacity: 1;
    transform: scale(1.08);
  }
}

@keyframes gateScan {
  0% {
    stroke-dashoffset: 1;
    opacity: 0.35;
  }

  45%,
  72% {
    stroke-dashoffset: 0;
    opacity: 1;
  }

  100% {
    stroke-dashoffset: 0;
    opacity: 0.35;
  }
}

@keyframes gateLock {
  0%,
  28%,
  100% {
    opacity: 0.55;
    transform: scaleX(0.82);
  }

  42%,
  76% {
    opacity: 1;
    transform: scaleX(1);
  }
}

@keyframes moduleSettle {
  0%,
  100% {
    transform: translateX(0);
  }

  36% {
    transform: translateX(2px);
  }

  52% {
    transform: translateX(0);
  }
}

@keyframes portPulse {
  0%,
  100% {
    opacity: 0.72;
    transform: scale(0.94);
  }

  48% {
    opacity: 1;
    transform: scale(1.06);
  }
}

@keyframes signalPulse {
  0%,
  100% {
    opacity: 0.14;
    transform: scale(0.82);
  }

  42% {
    opacity: 0.48;
    transform: scale(1.35);
  }
}

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

@media (min-width: 720px) {
  .site-nav {
    display: flex;
  }

  .hero {
    grid-template-columns: minmax(0, 0.98fr) minmax(330px, 0.82fr);
  }

  .contrast-table,
  .split,
  .cta-panel {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .lifecycle {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lifecycle li:nth-child(2n) {
    border-right: 0;
  }

  .lifecycle li:nth-child(3n) {
    border-right: 1px solid var(--rule);
  }

  .lifecycle li:nth-last-child(-n + 3) {
    border-bottom: 1px solid var(--rule);
  }

  .lifecycle li:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .form-row {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 1040px) {
  .lifecycle {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .lifecycle li:nth-child(2n) {
    border-right: 1px solid var(--rule);
  }

  .lifecycle li:nth-child(3n) {
    border-right: 0;
  }

  .lifecycle li:nth-last-child(-n + 3) {
    border-bottom: 0;
  }

  .outcome-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 719px) {
  .site-header {
    position: static;
    border-bottom: 0;
    background: transparent;
    backdrop-filter: none;
  }

  .brand small {
    display: none;
  }

  h1 {
    font-size: clamp(2.75rem, 13.8vw, 4.15rem);
  }

  h2 {
    font-size: clamp(2.25rem, 12vw, 3.7rem);
  }

  .hero {
    min-height: auto;
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .hero-visual {
    min-height: 0;
  }

  .rdd-diagram {
    height: 252px;
  }

  .visual-system-label,
  .visual-readout {
    display: none;
  }

  .visual-caption {
    display: none;
  }

  .truth-list div {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .concept-ledger article {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
    padding: var(--space-lg) 0;
  }

  .lifecycle {
    background: var(--rule);
  }

  .lifecycle li,
  .lifecycle li:nth-child(2n),
  .lifecycle li:nth-child(3n),
  .lifecycle li:nth-last-child(-n + 2),
  .lifecycle li:nth-last-child(-n + 3) {
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .lifecycle li:last-child {
    border-bottom: 0;
  }

  .button,
  .signup-form .button-primary {
    width: 100%;
  }
}

/* Refined utility pass: clean, value-first, and intentionally restrained. */
:root {
  --bg: oklch(97.8% 0.006 230);
  --bg-soft: oklch(94.8% 0.009 230);
  --ink: oklch(18% 0.016 235);
  --ink-muted: oklch(40% 0.018 235);
  --ink-faint: oklch(60% 0.014 235);
  --rule: oklch(86% 0.01 235);
  --surface: oklch(99% 0.003 235);
  --blue: oklch(53% 0.13 224);
  --blue-dark: oklch(36% 0.1 224);
  --cyan: oklch(66% 0.11 194);
  --violet: oklch(46% 0.08 268);
  --shadow: 0 26px 80px oklch(35% 0.035 235 / 0.11);
  --shadow-quiet: 0 12px 34px oklch(35% 0.03 235 / 0.09);
}

body {
  background:
    radial-gradient(circle at 82% 8%, oklch(82% 0.052 210 / 0.42), transparent 30rem),
    linear-gradient(180deg, oklch(98% 0.004 235), var(--bg));
  font-family: "IBM Plex Sans", "Aptos", "Segoe UI", sans-serif;
}

.site-header {
  min-height: 70px;
  border-color: oklch(87% 0.01 235 / 0.76);
  background: oklch(98% 0.004 235 / 0.9);
}

.brand {
  gap: 0.85rem;
}

.brand-mark {
  width: 2.7rem;
  height: 2.7rem;
  border-color: var(--ink);
  overflow: hidden;
  background: var(--surface);
  color: var(--ink);
  font-size: 0;
  padding: 0.2rem;
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand strong {
  font-weight: 700;
}

.brand small,
.site-nav {
  font-size: 0.86rem;
}

.section {
  padding: 6.75rem 0;
}

.hero {
  min-height: min(820px, calc(100svh - 70px));
  gap: 4rem;
  padding-top: 4.5rem;
  padding-bottom: 3.25rem;
}

h1,
h2 {
  font-family: "IBM Plex Serif", Georgia, serif;
  font-weight: 600;
  letter-spacing: 0;
}

h1 {
  max-width: 11.5ch;
  font-size: 5.55rem;
  line-height: 0.95;
}

h2 {
  max-width: 14ch;
  font-size: 4.2rem;
  line-height: 1;
}

h3 {
  font-weight: 700;
}

.eyebrow {
  color: var(--blue-dark);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.hero-statement {
  max-width: 48ch;
  margin-top: 1.65rem;
  font-size: 1.38rem;
  font-weight: 600;
  line-height: 1.35;
}

.hero-body,
.section-heading p,
.long-copy,
.final-cta p {
  font-size: 1.04rem;
  line-height: 1.65;
}

.button {
  min-height: 3.05rem;
  padding: 0.82rem 1.1rem;
  font-weight: 700;
}

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

.button-secondary {
  background: transparent;
}

.hero-visual {
  min-height: 410px;
  border-color: oklch(82% 0.012 235);
  background:
    linear-gradient(90deg, transparent 0 51.8%, oklch(67% 0.03 235 / 0.32) 51.8% 52%, transparent 52%),
    linear-gradient(135deg, oklch(99% 0.003 235 / 0.96), oklch(94% 0.013 225 / 0.96));
  box-shadow: var(--shadow), inset 0 1px 0 oklch(100% 0 0 / 0.88);
}

.hero-visual::before {
  background-size: 34px 34px;
  opacity: 0.28;
}

.hero-visual::after {
  opacity: 0.18;
}

.visual-system-label,
.visual-readout,
.visual-caption span {
  border-color: oklch(82% 0.012 235);
  background: oklch(99% 0.003 235 / 0.9);
  box-shadow: 0 10px 26px oklch(35% 0.025 235 / 0.08);
  font-weight: 650;
}

.diagram-grid path {
  stroke: oklch(78% 0.012 235);
  opacity: 0.38;
}

.diagram-noise circle {
  fill: oklch(46% 0.03 224);
  opacity: 0.24;
}

.diagram-flow {
  stroke-width: 4.4;
  filter: drop-shadow(0 12px 18px oklch(53% 0.1 224 / 0.18));
}

.diagram-node {
  stroke-width: 3.2;
  filter: drop-shadow(0 8px 13px oklch(53% 0.08 224 / 0.14));
}

.diagram-gate {
  fill: oklch(95% 0.018 252);
  stroke-width: 2.2;
}

.diagram-gate-core {
  fill: oklch(30% 0.04 244);
  opacity: 0.82;
}

.diagram-stack rect {
  fill: oklch(98.5% 0.004 235);
  stroke: oklch(30% 0.028 235);
  stroke-width: 1.45;
  filter: drop-shadow(0 7px 9px oklch(35% 0.02 235 / 0.07));
}

.diagram-labels {
  fill: oklch(38% 0.02 235);
  font-size: 15px;
  font-weight: 650;
}

.value-strip {
  display: grid;
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.value-strip div {
  display: grid;
  gap: 0.7rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--rule);
}

.value-strip div:last-child {
  border-bottom: 0;
}

.value-strip span {
  color: var(--blue-dark);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.value-strip strong {
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 650;
  line-height: 1.3;
}

.section-dark {
  margin-top: 5.75rem;
  background:
    linear-gradient(180deg, oklch(18% 0.02 238 / 0.18), transparent 8rem),
    radial-gradient(circle at 88% 18%, oklch(46% 0.09 224 / 0.26), transparent 27rem),
    linear-gradient(135deg, oklch(17% 0.022 238), oklch(14% 0.018 245));
}

.contrast-column,
.contrast-column-accent,
.lifecycle li,
.concept-grid article,
.use-grid article,
.outcome-list div,
.roadmap div {
  box-shadow: none;
}

.contrast-column {
  background: oklch(21% 0.023 238);
}

.contrast-column-accent {
  background: oklch(23% 0.031 230);
}

.lifecycle {
  background: var(--rule);
}

.lifecycle li {
  background: var(--surface);
}

.lifecycle li:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px oklch(35% 0.028 235 / 0.08);
}

.concept-ledger article {
  grid-template-columns: 4rem minmax(12rem, 0.62fr) minmax(15rem, 1fr);
}

.use-grid article {
  min-height: 150px;
}

.cta-panel {
  background:
    radial-gradient(circle at 84% 18%, oklch(66% 0.11 194 / 0.18), transparent 17rem),
    linear-gradient(120deg, oklch(17% 0.022 238), oklch(22% 0.034 232));
}

@media (min-width: 720px) {
  .value-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .value-strip div {
    min-height: 116px;
    padding: 1.15rem 1.35rem;
    border-right: 1px solid var(--rule);
    border-bottom: 0;
  }

  .value-strip div:first-child {
    padding-left: 0;
  }

  .value-strip div:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

@media (min-width: 1040px) {
  h1 {
    font-size: 5.9rem;
  }

  h2 {
    font-size: 4.45rem;
  }

  .hero:has(.hero-visual-image) {
    grid-template-columns: minmax(0, 0.86fr) minmax(520px, 1.08fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .hero:has(.hero-visual-image) .hero-copy {
    max-width: 610px;
  }

  .hero-visual-image {
    width: min(54vw, 640px);
    justify-self: end;
  }
}

@media (max-width: 719px) {
  .site-header {
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  .section {
    padding: 4.75rem 0;
  }

  .hero {
    padding-top: 2.5rem;
  }

  h1 {
    font-size: 3.35rem;
    line-height: 0.98;
  }

  h2 {
    font-size: 2.72rem;
    line-height: 1.02;
  }

  .hero-statement {
    font-size: 1.18rem;
  }

  .value-strip {
    margin-top: 1rem;
  }

  .section-dark {
    margin-top: 4.5rem;
  }

  .concept-ledger article {
    grid-template-columns: 1fr;
  }
}

/* Layout rail pass: prevent dense blocks from pressing against page edges. */
:root {
  --page-gutter: clamp(1rem, 4vw, 4rem);
  --section-rail: min(calc(100% - (var(--page-gutter) * 2)), var(--max));
  --wide-rail: min(calc(100% - (var(--page-gutter) * 2)), calc(var(--max) + 96px));
  --block-inset: clamp(0rem, 2vw, 2rem);
}

.section,
.value-strip,
.site-footer {
  width: var(--section-rail);
}

.section-dark,
.not-section,
.final-cta {
  width: var(--wide-rail);
  max-width: none;
  padding-inline: clamp(1.25rem, 4.4vw, 4rem);
}

.section-dark {
  margin-top: 5rem;
  margin-bottom: clamp(3.5rem, 7vw, 5.5rem);
}

.model-section {
  padding-top: clamp(5.5rem, 9vw, 8rem);
}

.core-idea {
  padding-top: clamp(5.75rem, 9vw, 8.25rem);
  padding-bottom: clamp(5.25rem, 8vw, 7.5rem);
}

.contrast-table,
.model-section .lifecycle,
.concepts-section .concept-ledger,
.use-section .use-grid,
.roadmap-section .roadmap {
  margin-inline: var(--block-inset);
}

.not-section .truth-list {
  margin-inline: var(--block-inset);
}

.value-strip div:first-child {
  padding-left: clamp(1rem, 2vw, 1.35rem);
}

.value-strip div:last-child {
  padding-right: clamp(1rem, 2vw, 1.35rem);
}

.split {
  column-gap: clamp(3rem, 8vw, 7rem);
}

.outcomes-section .split {
  align-items: start;
}

.outcomes-section .outcome-list {
  margin-top: 0.35rem;
}

@media (min-width: 720px) {
  .value-strip div:first-child {
    padding-left: 1.35rem;
  }

  .value-strip div:last-child {
    padding-right: 1.35rem;
  }
}

@media (max-width: 719px) {
  :root {
    --page-gutter: 1rem;
    --block-inset: 0;
  }

  .section-dark,
  .not-section,
  .final-cta {
    padding-inline: 1rem;
  }

  .section-dark {
    margin-top: 3.5rem;
  }

  .value-strip div:first-child,
  .value-strip div:last-child {
    padding-inline: 0;
  }
}

/* Hero operating-model image with restrained overdrive motion. */
.hero-visual-image {
  aspect-ratio: 1672 / 941;
  min-height: 0;
  overflow: hidden;
  background: oklch(99% 0.003 235);
}

.hero-visual-image::before,
.hero-visual-image::after {
  display: none;
}

.hero-diagram-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: saturate(1.02) contrast(1.02);
}

.hero-visual-image picture {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-diagram-motion {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  mix-blend-mode: multiply;
}

.motion-loop {
  position: absolute;
  left: 12.3%;
  top: 31.5%;
  width: 27%;
  aspect-ratio: 1;
  border: 2px solid oklch(62% 0.15 214 / 0.45);
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.82);
  animation: loopResolve 4.8s var(--ease-out) infinite;
}

.motion-loop-inner {
  left: 17.6%;
  top: 46.4%;
  width: 15.5%;
  border-color: oklch(68% 0.14 190 / 0.5);
  animation-delay: 820ms;
}

.motion-gate {
  position: absolute;
  left: 46.25%;
  top: 18.5%;
  width: 11.8%;
  height: 66%;
  border-radius: 999px;
  background:
    radial-gradient(circle at 50% 50%, oklch(75% 0.16 196 / 0.46), transparent 34%),
    linear-gradient(90deg, transparent, oklch(72% 0.15 196 / 0.34), transparent);
  filter: blur(10px);
  opacity: 0.54;
  animation: gateBreathe 3.6s var(--ease-out) infinite;
}

.motion-beam {
  position: absolute;
  left: 53.2%;
  top: 52.3%;
  width: 12.5%;
  height: 2.4%;
  background: linear-gradient(90deg, transparent, oklch(72% 0.15 196 / 0.82), oklch(60% 0.16 215 / 0.86), transparent);
  box-shadow:
    0 0 14px oklch(72% 0.15 196 / 0.55),
    0 0 28px oklch(72% 0.15 196 / 0.36);
  opacity: 0;
  transform: scaleX(0.35);
  transform-origin: left center;
  animation: beamCommit 3.6s var(--ease-quint) infinite;
}

.motion-check {
  position: absolute;
  right: 2.15%;
  top: 49.2%;
  width: 5.2%;
  aspect-ratio: 1;
  border: 2px solid oklch(68% 0.14 190 / 0.48);
  border-radius: 50%;
  box-shadow: 0 0 24px oklch(68% 0.14 190 / 0.35);
  opacity: 0;
  transform: scale(0.9);
  animation: checkArrive 3.6s var(--ease-out) infinite;
}

@keyframes loopResolve {
  0% {
    opacity: 0;
    transform: scale(0.76) rotate(0deg);
  }

  34% {
    opacity: 0.5;
  }

  64%,
  100% {
    opacity: 0;
    transform: scale(1.12) rotate(34deg);
  }
}

@keyframes gateBreathe {
  0%,
  100% {
    opacity: 0.26;
    transform: scaleX(0.86);
  }

  42%,
  68% {
    opacity: 0.72;
    transform: scaleX(1);
  }
}

@keyframes beamCommit {
  0%,
  30% {
    opacity: 0;
    transform: scaleX(0.22);
  }

  46%,
  72% {
    opacity: 0.9;
    transform: scaleX(1);
  }

  100% {
    opacity: 0;
    transform: scaleX(1.04);
  }
}

@keyframes checkArrive {
  0%,
  58% {
    opacity: 0;
    transform: scale(0.82);
  }

  72% {
    opacity: 0.78;
    transform: scale(1.05);
  }

  100% {
    opacity: 0;
    transform: scale(1.22);
  }
}

@media (max-width: 719px) {
  .hero-visual-image {
    aspect-ratio: 1672 / 941;
  }

  .motion-loop,
  .motion-loop-inner,
  .motion-gate,
  .motion-check {
    display: none;
  }
}