:root {
  --black-ink: #090B0A;
  --graphite: #121715;
  --carbon: #1B211E;
  --signal-lime: #C8F55A;
  --lime-soft: #E5FF9A;
  --burnished-copper: #D9895B;
  --copper-soft: #F2B895;
  --digital-lilac: #A99AEF;
  --lilac-soft: #D5CDFC;
  --mist: #E9EEE8;
  --white: #FAFCF8;
  --muted: #8C9690;
  --line: rgba(255, 255, 255, 0.10);
  --line-dark: rgba(18, 23, 21, 0.14);
  --ink-soft: rgba(9, 11, 10, 0.72);
  --font-display: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  --font-body: Inter, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --wrap: 1380px;
  --pad: clamp(20px, 4.5vw, 72px);
  --section: clamp(88px, 12vw, 168px);
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  max-width: 100%;
  overflow-x: clip;
}

body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--mist);
  background: var(--black-ink);
  text-rendering: optimizeLegibility;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 90;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
}

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

ul,
ol {
  padding: 0;
  list-style: none;
}

::selection {
  background: var(--signal-lime);
  color: var(--black-ink);
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: var(--pad);
  top: 0;
  z-index: 100;
  transform: translateY(-140%);
  background: var(--signal-lime);
  color: var(--black-ink);
  padding: 0.7rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
}

.skip:focus {
  transform: none;
}

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.wrap {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding-inline: var(--pad);
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.4rem;
}

.kicker-dark {
  color: #5f6b64;
}

.display {
  font-family: var(--font-display);
  font-size: clamp(44px, 7.4vw, 108px);
  font-weight: 650;
  letter-spacing: -0.07em;
  line-height: 0.88;
  text-transform: uppercase;
  color: var(--mist);
}

.display-sm {
  font-family: var(--font-display);
  font-size: clamp(32px, 4.6vw, 64px);
  font-weight: 650;
  letter-spacing: -0.06em;
  line-height: 0.92;
  text-transform: uppercase;
}

.display-dark,
.display-sm.display-dark {
  color: var(--black-ink);
}

.lede {
  max-width: 38rem;
  margin-top: 1.6rem;
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  color: var(--muted);
}

.section-mist .lede {
  color: #3f4943;
}

.lede-narrow {
  margin-bottom: 3.5rem;
}

.c-mist { color: var(--mist); }
.c-lime { color: var(--signal-lime); }
.c-copper { color: var(--burnished-copper); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 2px;
  background: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn span {
  display: inline-block;
  transition: transform 0.25s ease;
}

.btn:hover span,
.header-cta:hover span {
  transform: translateX(5px);
}

.btn-lime {
  background: var(--signal-lime);
  color: var(--black-ink);
}

.btn-lime:hover {
  background: var(--lime-soft);
}

.btn-lime:focus-visible {
  outline-color: var(--white);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--mist);
}

.btn-ghost:hover {
  border-color: var(--burnished-copper);
  color: var(--copper-soft);
}

.btn-line {
  border-color: var(--line);
  color: var(--mist);
}

.btn-line:hover {
  border-color: var(--signal-lime);
  color: var(--signal-lime);
}

.btn-dark {
  background: var(--black-ink);
  color: var(--mist);
}

.btn-dark:hover {
  background: var(--graphite);
}

.panel-flag {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--digital-lilac);
  margin-bottom: 1rem;
}

.section[id],
.cap[id],
.finale {
  scroll-margin-top: 4.5rem;
}

.section {
  padding: var(--section) 0;
  position: relative;
}

main:focus {
  outline: none;
}

.section-ink {
  background: var(--black-ink);
}

.section-graphite {
  background:
    radial-gradient(ellipse 80% 60% at 80% 0%, rgba(169, 154, 239, 0.07), transparent 50%),
    var(--graphite);
}

.section-carbon {
  background: var(--carbon);
}

.section-mist {
  background:
    linear-gradient(180deg, rgba(201, 245, 90, 0.06), transparent 28%),
    var(--mist);
  color: var(--black-ink);
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  color: var(--white);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.05rem var(--pad);
  transition: padding 0.25s ease, background-color 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(27, 33, 30, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.site-header.is-scrolled .header-inner {
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--white);
  margin-right: auto;
}

.logo-word {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.06em;
  text-transform: uppercase;
}

.qpulse {
  width: 34px;
  height: 34px;
  flex: none;
  color: currentColor;
  overflow: visible;
}

.qpulse-hero {
  width: 64px;
  height: 64px;
}

.qp-stroke,
.qp-orbit,
.qp-tail {
  fill: none;
  stroke: currentColor;
}

.qp-stroke {
  stroke-width: 2.4;
  stroke-linecap: round;
}

.qp-orbit {
  stroke-width: 1.6;
}

.qp-tail {
  stroke-width: 2.2;
  stroke-linecap: round;
}

.qp-track {
  fill: none;
  stroke: var(--signal-lime);
  stroke-width: 1.15;
  stroke-linecap: round;
}

.qp-pulse {
  fill: var(--signal-lime);
  stroke: none;
}

.nav-desktop {
  display: flex;
  gap: 1.6rem;
}

.nav-desktop a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
}

.nav-desktop a:hover {
  color: var(--mist);
}

.sys-status {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.sys-dot {
  width: 6px;
  height: 6px;
  background: var(--signal-lime);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

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

.header-cta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--signal-lime);
  white-space: nowrap;
}

.header-cta span {
  display: inline-block;
  transition: transform 0.25s ease;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--mist);
  cursor: pointer;
  position: relative;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 1px;
  background: currentColor;
  content: "";
}

.nav-toggle-bars {
  top: 20px;
}

.nav-toggle-bars::before {
  top: -7px;
}

.nav-toggle-bars::after {
  top: 7px;
}

.nav-panel {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: var(--black-ink);
  padding: 1.4rem var(--pad) 2.5rem;
  display: flex;
  flex-direction: column;
}

.nav-panel[hidden] {
  display: none;
}

.nav-panel-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-close {
  background: none;
  border: 0;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
}

.nav-panel-links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 3rem;
}

.nav-panel-links a {
  font-family: var(--font-display);
  font-size: clamp(36px, 9vw, 68px);
  font-weight: 650;
  letter-spacing: -0.07em;
  line-height: 1.02;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--mist);
}

.nav-panel-links a:hover {
  color: var(--signal-lime);
}

.nav-panel-foot {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Hero */
.hero,
.finale {
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(ellipse 70% 55% at 78% 42%, rgba(200, 245, 90, 0.07), transparent 55%),
    radial-gradient(ellipse 45% 40% at 12% 85%, rgba(217, 137, 91, 0.08), transparent 50%),
    radial-gradient(ellipse 40% 35% at 40% 10%, rgba(169, 154, 239, 0.06), transparent 55%),
    var(--black-ink);
  overflow: clip;
}

.signal-field {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
}

.signal-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.sf-grid {
  stroke: rgba(255, 255, 255, 0.055);
  stroke-width: 1;
}

.sf-dot {
  fill: rgba(233, 238, 232, 0.32);
}

.sf-path {
  fill: none;
  stroke-linecap: round;
}

.sf-path-main {
  stroke: rgba(200, 245, 90, 0.5);
  stroke-width: 1.35;
}

.sf-path-copper {
  stroke: rgba(217, 137, 91, 0.38);
  stroke-width: 1.1;
}

.sf-path-lilac {
  stroke: rgba(169, 154, 239, 0.36);
  stroke-width: 1.1;
}

.sf-node-core {
  fill: var(--black-ink);
  stroke: var(--signal-lime);
  stroke-width: 1.4;
}

.sf-node-ring {
  fill: none;
  stroke: rgba(200, 245, 90, 0.35);
  stroke-width: 1;
}

.sf-orbit {
  fill: none;
  stroke: rgba(169, 154, 239, 0.28);
  stroke-width: 1;
}

.sf-pulse {
  fill: var(--signal-lime);
}

.sf-pulse-copper {
  fill: var(--burnished-copper);
}

.sf-label {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
}

.hero-stage {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: grid;
  align-items: end;
  padding-top: 7.2rem;
  padding-bottom: clamp(2rem, 5vh, 3.5rem);
}

.hero-copy {
  min-width: 0;
  container-type: inline-size;
}

.hero-brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
  font-family: var(--font-display);
  font-size: clamp(36px, 5.6vw, 76px);
  font-weight: 650;
  letter-spacing: -0.07em;
  text-transform: uppercase;
  color: var(--mist);
  line-height: 1;
}

.hero-display,
.finale-display {
  font-family: var(--font-display);
  font-size: clamp(42px, 10vw, 150px);
  font-weight: 650;
  letter-spacing: -0.075em;
  line-height: 0.84;
  text-transform: uppercase;
}

@container (min-width: 0) {
  .hero-display {
    font-size: clamp(42px, 14.2cqi, 150px);
  }
}

.hero-display .line,
.finale-display .line {
  display: block;
}

.hero-lead {
  max-width: 34rem;
  margin-top: 1.6rem;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  color: #b7c0ba;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
  margin-top: 2rem;
}

/* Approach */
.clarity-word {
  margin-top: clamp(2.5rem, 6vw, 5rem);
  font-family: var(--font-display);
  font-size: clamp(64px, 16vw, 220px);
  font-weight: 650;
  letter-spacing: -0.08em;
  line-height: 0.8;
  text-transform: uppercase;
  color: var(--signal-lime);
}

/* Thinking stack */
.stack-section {
  padding-top: 0;
}

.think-track {
  position: relative;
  height: 1px;
  background: var(--line-dark);
  margin: 3rem 0 2.5rem;
}

.think-signal {
  position: absolute;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -4px;
  background: var(--signal-lime);
  animation: rail-run 5s linear infinite;
}

.think-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem 1.5rem;
  counter-reset: none;
}

.think-idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: #6a756e;
  margin-bottom: 0.85rem;
}

.think-list h3 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 650;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  line-height: 0.95;
}

.think-list p {
  margin-top: 0.7rem;
  color: #3f4943;
}

@keyframes rail-run {
  from { left: 0; }
  to { left: calc(100% - 9px); }
}

/* Capabilities */
.cap-index {
  display: grid;
  margin-top: 1rem;
}

.cap {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr) minmax(0, 18rem);
  gap: 1rem 1.5rem;
  align-items: start;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
  cursor: default;
}

.cap:last-child {
  border-bottom: 1px solid var(--line);
}

.cap-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding-top: 0.35rem;
}

.cap h3 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 650;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  line-height: 1;
}

.cap-body p {
  margin-top: 0.55rem;
  max-width: 36rem;
  color: var(--muted);
}

.cap-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  justify-content: flex-end;
  opacity: 0;
  transform: translateX(14px);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.cap:hover .cap-keys,
.cap:focus-within .cap-keys {
  opacity: 1;
  transform: none;
}

.cap-keys li {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.cap-keys li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--signal-lime);
}

/* Control center */
.control {
  margin-top: 3rem;
  border: 1px solid var(--line);
  background: rgba(9, 11, 10, 0.55);
  padding: 1.2rem 1.2rem 1.4rem;
}

.control-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.4rem;
}

.control-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.control-tabs {
  display: flex;
  gap: 0.2rem;
  overflow-x: auto;
}

.control-tabs button {
  background: none;
  border: 0;
  border-bottom: 1px solid transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
  white-space: nowrap;
}

.control-tabs button[aria-selected="true"] {
  color: var(--signal-lime);
  border-bottom-color: var(--signal-lime);
}

.control-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(180px, 0.7fr);
  gap: 1.5rem;
}

.process-viz {
  height: 180px;
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
}

.process-log {
  display: grid;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.process-log li {
  padding-left: 1rem;
  position: relative;
}

.process-log li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 6px;
  height: 6px;
  background: var(--line);
}

.process-log li.is-on {
  color: var(--mist);
}

.process-log li.is-on::before {
  background: var(--signal-lime);
}

.process-note {
  margin-top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Flow */
.flow-nodes {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}

.flow-nodes li {
  min-height: 180px;
  border: 1px solid var(--line);
  padding: 1.1rem 1rem 1.2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.flow-stage {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.flow-nodes strong {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 48px);
  font-weight: 650;
  letter-spacing: -0.06em;
  text-transform: uppercase;
  line-height: 0.9;
}

.flow-rail {
  position: relative;
  height: 1px;
  margin-top: 1.4rem;
  background: var(--line);
}

.flow-rail-signal {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -5px;
  background: var(--signal-lime);
  animation: rail-run 6s linear infinite;
}

/* Workflow */
.workflow {
  margin-top: 2.5rem;
  border: 1px solid var(--line);
  padding: 1.2rem;
}

.workflow-canvas {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  padding: 0.4rem 0 1.2rem;
}

.wf-node {
  flex: none;
  width: 168px;
  border: 1px solid var(--line);
  padding: 0.9rem 0.9rem 1rem;
  background: rgba(9, 11, 10, 0.35);
  cursor: grab;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.wf-node.is-hot {
  border-color: var(--signal-lime);
  background: rgba(200, 245, 90, 0.06);
}

.wf-grip {
  display: block;
  width: 18px;
  height: 8px;
  margin-bottom: 0.7rem;
  background:
    linear-gradient(var(--muted) 1px, transparent 1px) 0 1px / 100% 4px repeat-y;
  opacity: 0.7;
}

.wf-type {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--burnished-copper);
}

.wf-name {
  margin-top: 0.35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.wf-join {
  flex: none;
  width: 28px;
  height: 1px;
  background: var(--line);
  position: relative;
}

.wf-join::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-right: 1px solid var(--line);
  border-top: 1px solid var(--line);
  transform: rotate(45deg);
}

.workflow-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

/* Architecture */
.arch {
  position: relative;
  margin-top: 2.8rem;
}

.arch-signals {
  position: absolute;
  inset: 3.2rem 18% 1rem 8%;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.arch-signals span {
  width: 1px;
  background: linear-gradient(var(--signal-lime), var(--digital-lilac), transparent);
  position: relative;
  overflow: hidden;
}

.arch-signals span::after {
  content: "";
  position: absolute;
  left: -3px;
  width: 7px;
  height: 7px;
  background: var(--signal-lime);
  animation: fall 3.6s linear infinite;
}

.arch-signals span:nth-child(2)::after {
  animation-delay: 1.1s;
  background: var(--burnished-copper);
}

.arch-signals span:nth-child(3)::after {
  animation-delay: 2.1s;
  background: var(--digital-lilac);
}

@keyframes fall {
  from { top: -8px; }
  to { top: 100%; }
}

.arch-layer {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.arch-layer.is-in,
.arch.is-in .arch-layer {
  opacity: 1;
  transform: none;
}

.arch-layer:nth-child(3) { transition-delay: 0.05s; }
.arch-layer:nth-child(4) { transition-delay: 0.12s; }
.arch-layer:nth-child(5) { transition-delay: 0.18s; }
.arch-layer:nth-child(6) { transition-delay: 0.24s; }
.arch-layer:nth-child(7) { transition-delay: 0.3s; }

.arch-layer h3 {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 78px);
  font-weight: 650;
  letter-spacing: -0.07em;
  text-transform: uppercase;
  line-height: 0.9;
}

.arch-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--digital-lilac);
}

/* Principles */
.principle-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem 4rem;
  margin-top: 3.5rem;
}

.principle-list span {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 92px);
  font-weight: 650;
  letter-spacing: -0.08em;
  line-height: 0.8;
  color: var(--signal-lime);
}

.principle-list h3 {
  margin-top: 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 650;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

.principle-list p {
  margin-top: 0.5rem;
  color: #3f4943;
}

/* Split */
.split {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.5rem;
  align-items: start;
  margin-top: 2rem;
}

.split-col ul {
  margin-top: 1.2rem;
}

.split-col li {
  font-size: 1.15rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--line-dark);
  color: #3f4943;
}

.split-col-right {
  text-align: right;
}

.split-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 220px;
}

.split-line {
  width: 1px;
  flex: 1;
  background: var(--signal-lime);
}

.split-word {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 650;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  padding: 1rem 0;
  color: var(--black-ink);
}

.split-msg {
  margin-top: 2.8rem;
  max-width: 36rem;
  font-size: 1.15rem;
  color: #3f4943;
}

/* Lab */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin-top: 2.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.lab-mod {
  min-height: 280px;
  padding: 1.1rem 1rem 1.2rem;
  border: 0;
  border-left: 1px solid var(--line);
  background: transparent;
  color: var(--mist);
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow: hidden;
}

.lab-mod:first-child {
  border-left: 0;
}

.lab-idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lab-viz {
  flex: 1;
  position: relative;
  opacity: 0.35;
  transition: opacity 0.3s ease, transform 0.3s ease;
  transform: translateY(8px);
}

.lab-mod:hover .lab-viz,
.lab-mod:focus-visible .lab-viz,
.lab-mod.is-on .lab-viz {
  opacity: 1;
  transform: none;
}

.lab-mod[data-lab="software"] .lab-viz {
  background:
    repeating-linear-gradient(90deg, transparent 0 12px, rgba(200, 245, 90, 0.55) 12px 13px),
    repeating-linear-gradient(0deg, transparent 0 18px, rgba(200, 245, 90, 0.18) 18px 19px);
}

.lab-mod[data-lab="automation"] .lab-viz {
  background:
    radial-gradient(circle at 20% 30%, var(--burnished-copper) 2px, transparent 2.5px),
    radial-gradient(circle at 70% 60%, var(--burnished-copper) 2px, transparent 2.5px),
    linear-gradient(115deg, transparent 48%, rgba(217, 137, 91, 0.7) 49% 51%, transparent 52%);
  background-size: 100% 100%, 100% 100%, 100% 100%;
}

.lab-mod[data-lab="data"] .lab-viz {
  background:
    linear-gradient(var(--digital-lilac) 0 8%, transparent 8% 20%) 0 100% / 28% 70% no-repeat,
    linear-gradient(var(--digital-lilac) 0 8%, transparent 8% 20%) 36% 100% / 28% 90% no-repeat,
    linear-gradient(var(--lilac-soft) 0 8%, transparent 8% 20%) 72% 100% / 28% 55% no-repeat;
}

.lab-mod[data-lab="interfaces"] .lab-viz {
  border: 1px solid rgba(200, 245, 90, 0.35);
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 18px / 100% 22px,
    linear-gradient(90deg, rgba(200, 245, 90, 0.15) 32%, transparent 32%);
}

.lab-mod[data-lab="systems"] .lab-viz {
  background:
    radial-gradient(circle at 50% 50%, transparent 28px, rgba(169, 154, 239, 0.35) 29px, transparent 30px),
    radial-gradient(circle at 50% 50%, var(--signal-lime) 3px, transparent 3.5px),
    radial-gradient(circle at 50% 50%, transparent 48px, rgba(217, 137, 91, 0.4) 49px, transparent 50px);
}

.lab-mod:hover,
.lab-mod:focus-visible,
.lab-mod.is-on {
  background: rgba(255, 255, 255, 0.025);
}

/* Cases */
.cases {
  margin-top: 3rem;
  display: grid;
  gap: 0;
}

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

.case:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.case-trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "kicker open" "title open";
  gap: 0.35rem 1.5rem;
  padding: 1.6rem 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: inherit;
}

.case-kicker {
  grid-area: kicker;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #5f6b64;
}

.case-title {
  grid-area: title;
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 650;
  letter-spacing: -0.07em;
  line-height: 0.92;
  text-transform: uppercase;
}

.case-open {
  grid-area: open;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal-lime);
}

.case-panel {
  padding: 0 0 2.4rem;
}

.case-panel[hidden] {
  display: none;
}

.case-timeline {
  display: grid;
  gap: 0;
  max-width: 44rem;
  border-left: 1px solid var(--line-dark);
  margin-left: 0.35rem;
}

.case-timeline li {
  position: relative;
  padding: 0 0 1.8rem 1.4rem;
}

.case-timeline li::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 0.45rem;
  width: 7px;
  height: 7px;
  background: var(--signal-lime);
}

.case-timeline h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #3f4943;
  margin-bottom: 0.4rem;
}

.case-timeline p {
  color: #3f4943;
}

.mock {
  margin-top: 1rem;
  height: 120px;
  border: 1px solid var(--line-dark);
  background: var(--white);
  position: relative;
  overflow: hidden;
}

.mock-product {
  display: grid;
  grid-template-columns: 72px 1fr;
  padding: 0.8rem;
  gap: 0.8rem;
}

.mock-product span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #6a756e;
}

.mock-product b {
  display: block;
  height: 10px;
  background: #dfe6dc;
  margin-bottom: 8px;
}

.mock-product b:first-of-type {
  width: 70%;
  background: var(--signal-lime);
}

.mock-flow {
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  padding: 1.4rem;
}

.mock-flow i {
  width: 42px;
  height: 42px;
  border: 1px solid var(--burnished-copper);
  position: relative;
}

.mock-flow i + i::before {
  content: "";
  position: absolute;
  right: calc(100% + 2px);
  top: 50%;
  width: 28px;
  height: 1px;
  background: var(--burnished-copper);
}

.mock-system {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  padding: 1.2rem;
}

.mock-system span {
  border: 1px solid var(--digital-lilac);
  background: linear-gradient(180deg, rgba(169, 154, 239, 0.2), transparent);
}

/* Insights */
.insights {
  display: grid;
  margin-top: 2.5rem;
}

.insight {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 1rem 1.5rem;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
}

.insight:last-child {
  border-bottom: 1px solid var(--line);
}

.insight-num {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 650;
  letter-spacing: -0.07em;
  line-height: 0.9;
  color: var(--signal-lime);
}

.insight-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.insight-meta span {
  color: var(--digital-lilac);
}

.insight h3 {
  margin-top: 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 650;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  line-height: 1.02;
  max-width: 18ch;
}

/* About */
.about-wrap .btn {
  margin-top: 2rem;
}

/* Project form */
.project-form {
  margin-top: 2.4rem;
  max-width: 820px;
}

.project-cats {
  border: 0;
  padding: 0;
  margin: 0 0 1.6rem;
}

.project-cats legend {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
}

.cat {
  cursor: pointer;
}

.cat input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.cat span {
  display: block;
  border: 1px solid var(--line);
  padding: 0.85rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: center;
}

.cat input:focus-visible + span {
  outline: 2px solid var(--signal-lime);
  outline-offset: 3px;
}

.cat input:checked + span {
  border-color: var(--signal-lime);
  color: var(--signal-lime);
}

.form-note {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 650;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  margin: 0.4rem 0 1.6rem;
}

.fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.2rem;
  margin-bottom: 1.4rem;
}

.fields label {
  display: grid;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.field-full {
  grid-column: 1 / -1;
}

.fields input,
.fields textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--mist);
  padding: 0.55rem 0;
  border-radius: 0;
}

.fields textarea {
  resize: vertical;
  min-height: 6rem;
}

.fields input:focus,
.fields textarea:focus {
  outline: none;
  border-bottom-color: var(--signal-lime);
}

.form-status {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  min-height: 1.2em;
  color: var(--signal-lime);
}

.form-status.is-error {
  color: var(--burnished-copper);
}

/* Finale */
.finale {
  min-height: 100svh;
  display: grid;
  align-items: end;
}

.finale-copy {
  position: relative;
  z-index: 1;
  padding-top: 8rem;
  padding-bottom: clamp(3rem, 8vh, 5rem);
}

/* Footer */
.site-footer {
  background: var(--carbon);
  border-top: 1px solid var(--line);
  padding: 4.5rem 0 1.6rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 0.7fr));
  gap: 2.5rem 2rem;
}

.footer-name {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 650;
  letter-spacing: -0.06em;
  text-transform: uppercase;
}

.footer-desc {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-line {
  margin-top: 1rem;
  font-size: 1.05rem;
}

.footer-line.muted {
  color: var(--muted);
  margin-top: 0.35rem;
}

.site-footer nav {
  display: grid;
  align-content: start;
  gap: 0.45rem;
}

.site-footer nav p {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.site-footer nav a {
  text-decoration: none;
  color: var(--mist);
}

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

.footer-base {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 3.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-base a {
  text-decoration: none;
  color: var(--muted);
}

.footer-base a:hover {
  color: var(--mist);
}

/* Signal field extras drawn in JS */
.sf-process-path {
  fill: none;
  stroke: rgba(200, 245, 90, 0.7);
  stroke-width: 1.4;
}

/* Reveals */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Responsive */
@media (max-width: 1080px) {
  .nav-desktop,
  .sys-status {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .think-list,
  .lab-grid,
  .flow-nodes {
    grid-template-columns: 1fr 1fr;
  }

  .lab-mod:nth-child(odd) {
    border-left: 0;
  }

  .lab-grid {
    border-bottom: 0;
  }

  .lab-mod {
    border-bottom: 1px solid var(--line);
  }

  .cap {
    grid-template-columns: 3rem minmax(0, 1fr);
  }

  .cap-keys {
    grid-column: 2;
    justify-content: flex-start;
  }

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

@media (max-width: 820px) {
  .hero-stage,
  .control-grid,
  .split,
  .principle-list,
  .cat-grid,
  .fields {
    grid-template-columns: 1fr;
  }

  .hero-stage {
    padding-bottom: 2rem;
  }

  .hero .wrap.hero-stage {
    display: flex;
    flex-direction: column;
  }

  .split-col-right,
  .split-center {
    text-align: left;
  }

  .split-center {
    min-height: 0;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
  }

  .split-line {
    width: 72px;
    height: 1px;
    flex: none;
  }

  .split-word {
    writing-mode: horizontal-tb;
    transform: none;
    padding: 0;
  }

  .insight {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .workflow-canvas {
    padding-bottom: 0.4rem;
  }
}

@media (max-width: 640px) {
  .think-list,
  .flow-nodes,
  .lab-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .lab-mod {
    min-height: 180px;
    border-left: 0;
  }

  .header-cta {
    display: none;
  }

  .hero-display,
  .finale-display {
    font-size: clamp(36px, 14vw, 64px);
  }

  .clarity-word {
    font-size: clamp(56px, 22vw, 96px);
  }

  .cap-keys {
    opacity: 1;
    transform: none;
  }
}

@media (hover: none) {
  .cap-keys {
    opacity: 1;
    transform: none;
  }
}

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

  .think-signal,
  .flow-rail-signal,
  .sys-dot,
  .arch-signals span::after,
  .reveal,
  .arch-layer,
  .lab-viz {
    animation: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}