/* ============================================================
   FUSE — conversion-first landing page
   Light coordinate system + concentrated dark proof moments
   ============================================================ */

:root {
  --ink: #111111;
  --ink-soft: #4f4f4b;
  --cloud: #f7f7f5;
  --paper: #fbfbf9;
  --white: #ffffff;
  --signal-orange: #ff6a2a;
  --glow-coral: #ff8f6b;
  --orange-ink: #a2380d;
  --grid-gray: #cfcfcb;
  --grid-soft: #e9e9e5;
  --dark-panel: #1b1b1b;
  --dark-line: rgba(255, 255, 255, 0.14);
  --dark-muted: #b7b6b0;
  --success: #177a4a;
  --error: #b42318;
  --font-display: "Inter Tight", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;
  --shell-max: 1280px;
  --shell-pad: clamp(20px, 5vw, 64px);
  --radius-sm: 8px;
  --radius-md: 18px;
  --radius-lg: 30px;
  --shadow-soft: 0 20px 70px rgba(17, 17, 17, 0.08);
  --shadow-orange: 0 16px 48px rgba(255, 106, 42, 0.24);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

body {
  min-width: 320px;
  color: var(--ink);
  background: var(--cloud);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-dialog-open {
  overflow: hidden;
}

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

button,
input {
  font: inherit;
}

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

a {
  color: inherit;
}

[hidden] {
  display: none !important;
}

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

.mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

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

/* ---------- Typography ---------- */

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.99;
  text-wrap: balance;
}

h1 {
  max-width: 10ch;
  font-size: clamp(52px, 7vw, 104px);
}

h2 {
  font-size: clamp(39px, 5.5vw, 76px);
}

h3 {
  font-size: clamp(20px, 2vw, 27px);
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.eyebrow {
  margin-bottom: 22px;
  color: var(--glow-coral);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.19em;
  line-height: 1.5;
  text-transform: uppercase;
}

.eyebrow--ink {
  color: var(--orange-ink);
}

.lede {
  max-width: 34em;
  margin-top: 28px;
  color: var(--dark-muted);
  font-size: clamp(17px, 1.45vw, 21px);
  line-height: 1.58;
}

.lede--ink,
.section-lede {
  color: var(--ink-soft);
}

.lede--center {
  margin-inline: auto;
}

.section-lede {
  max-width: 42em;
  margin-top: 24px;
  font-size: 18px;
}

/* ---------- Page modes ---------- */

section {
  padding-block: clamp(88px, 10vw, 144px);
}

.mode-coordinate,
.mode-fusion {
  position: relative;
  overflow: hidden;
}

.mode-coordinate {
  color: var(--ink);
  background: var(--cloud);
}

.mode-coordinate--warm {
  background: #f2f0eb;
}

.mode-fusion {
  color: var(--white);
  background: var(--ink);
}

.dot-field {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(17, 17, 17, 0.15) 0.8px, transparent 0.9px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(ellipse 80% 72% at 70% 32%, #000 0%, transparent 78%);
  mask-image: radial-gradient(ellipse 80% 72% at 70% 32%, #000 0%, transparent 78%);
}

.corner-numeral {
  position: absolute;
  top: 34px;
  right: var(--shell-pad);
  color: transparent;
  font-family: var(--font-mono);
  font-size: clamp(50px, 7vw, 96px);
  line-height: 1;
  pointer-events: none;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.18);
}

.metadata-rail {
  position: absolute;
  top: 50%;
  right: calc(var(--shell-pad) / 2);
  display: flex;
  gap: 18px;
  color: rgba(17, 17, 17, 0.45);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.19em;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
}

.section-heading {
  margin-bottom: clamp(48px, 6vw, 80px);
}

/* ---------- Buttons ---------- */

.button {
  position: relative;
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 25px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
  text-decoration: none;
  transition:
    transform 180ms var(--ease-out),
    color 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    box-shadow 220ms ease;
}

.button::after {
  position: absolute;
  inset: -1px;
  background: linear-gradient(110deg, transparent 20%, rgba(255, 255, 255, 0.35) 48%, transparent 74%);
  content: "";
  pointer-events: none;
  transform: translateX(-130%);
  transition: transform 520ms var(--ease-out);
}

.button:hover::after,
.button:focus-visible::after {
  transform: translateX(130%);
}

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

.button:focus-visible,
.menu-toggle:focus-visible,
.dialog-close:focus-visible,
.demo-toggle button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

.mode-fusion .button:focus-visible,
.mode-fusion button:focus-visible,
.site-footer a:focus-visible {
  outline-color: var(--white);
  box-shadow: 0 0 0 2px var(--ink), 0 0 0 5px var(--white);
}

.button--primary {
  color: var(--ink);
  background: var(--signal-orange);
  box-shadow: 0 8px 24px rgba(255, 106, 42, 0.18);
}

.button--primary:hover,
.button--primary:focus-visible {
  color: var(--ink);
  background: #f45718;
  box-shadow: var(--shadow-orange);
}

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

.button--light:hover {
  box-shadow: 0 14px 42px rgba(255, 106, 42, 0.2);
}

.button--secondary,
.button--ghost-dark {
  color: var(--ink);
  border-color: rgba(17, 17, 17, 0.18);
  background: transparent;
}

.button--secondary:hover,
.button--ghost-dark:hover {
  border-color: var(--ink);
  background: rgba(17, 17, 17, 0.04);
}

.button--small {
  min-height: 44px;
  padding: 10px 18px;
  font-size: 14px;
}

.button--large {
  min-height: 56px;
  padding: 17px 32px;
  font-size: 17px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.button-row--center {
  justify-content: center;
}

.trust-line {
  max-width: 56ch;
  margin-top: 24px;
  color: #666660;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.11em;
  line-height: 1.7;
  text-transform: uppercase;
}

/* ---------- Header ---------- */

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  color: var(--white);
  background: var(--ink);
  border-radius: 6px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.site-header {
  position: fixed;
  z-index: 90;
  top: 0;
  right: 0;
  left: 0;
  border-bottom: 1px solid transparent;
  transition: background 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
}

.site-header.is-stuck {
  border-bottom-color: rgba(17, 17, 17, 0.09);
  background: rgba(247, 247, 245, 0.9);
  box-shadow: 0 8px 30px rgba(17, 17, 17, 0.04);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  height: 72px;
  align-items: center;
  gap: 36px;
}

.wordmark,
.dialog-brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 600;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.wordmark img,
.dialog-brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-inline: auto;
}

.nav-links > a:not(.button) {
  position: relative;
  display: flex;
  min-height: 44px;
  align-items: center;
  padding-block: 8px;
  color: #5a5a56;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.nav-links > a:not(.button)::after {
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 1px;
  background: var(--signal-orange);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms var(--ease-out);
}

.nav-links > a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-actions {
  display: flex;
  align-items: center;
}

.mobile-only,
.menu-toggle {
  display: none;
}

.menu-toggle {
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  border: 1px solid rgba(17, 17, 17, 0.14);
  border-radius: 8px;
  background: var(--cloud);
  cursor: pointer;
}

.menu-toggle span {
  width: 20px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* ---------- Hero ---------- */

.hero {
  display: flex;
  min-height: 100svh;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding-top: 120px;
  padding-bottom: 44px;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(430px, 1.08fr);
  align-items: center;
  gap: clamp(36px, 6vw, 94px);
}

.hero-copy {
  position: relative;
  z-index: 3;
}

.hero-copy h1 {
  max-width: 11ch;
  font-size: clamp(58px, 5.1vw, 78px);
}

.hero-copy h1 span {
  color: var(--orange-ink);
}

.hero-copy .lede {
  max-width: 34em;
}

.hero-actions {
  align-items: center;
}

.hero-proof-link {
  display: inline-flex;
  min-height: 44px;
  padding: 8px 4px;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  text-decoration-color: rgba(17, 17, 17, 0.3);
  text-underline-offset: 5px;
}

.hero-proof-link:hover {
  text-decoration-color: var(--signal-orange);
}

.hero-proof-link span {
  color: var(--orange-ink);
  transition: transform 180ms ease;
}

.hero-proof-link:hover span,
.hero-proof-link:focus-visible span {
  transform: translateX(3px);
}

.convergence-field {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  min-height: 460px;
  overflow: hidden;
  border: 1px solid rgba(17, 17, 17, 0.09);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(rgba(207, 207, 203, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(207, 207, 203, 0.18) 1px, transparent 1px),
    radial-gradient(circle at 50% 50%, rgba(255, 143, 107, 0.13), transparent 38%),
    rgba(255, 255, 255, 0.58);
  background-size: 38px 38px, 38px 38px, auto, auto;
  box-shadow: inset 0 0 80px rgba(255, 255, 255, 0.75), var(--shadow-soft);
  cursor: default;
  touch-action: manipulation;
}

.convergence-visual {
  position: absolute;
  inset: 0;
}

.convergence-field::before,
.convergence-field::after {
  position: absolute;
  z-index: 1;
  content: "";
  pointer-events: none;
}

.convergence-field::before {
  top: 50%;
  right: 8%;
  left: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 106, 42, 0.08), rgba(255, 106, 42, 0.26), rgba(255, 106, 42, 0.08), transparent);
}

.convergence-field::after {
  top: 10%;
  bottom: 10%;
  left: 50%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(255, 106, 42, 0.08), rgba(255, 106, 42, 0.3), rgba(255, 106, 42, 0.08), transparent);
}

.convergence-field canvas {
  position: absolute;
  z-index: 2;
  inset: 0;
  width: 100%;
  height: 100%;
}

.convergence-core {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  width: min(25%, 138px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  transition: transform 420ms var(--ease-out), filter 420ms ease;
  pointer-events: none;
}

.convergence-field[data-phase="resolving"] .convergence-core,
.convergence-field.is-cta-pulsing .convergence-core {
  filter: drop-shadow(0 0 34px rgba(255, 106, 42, 0.5));
  transform: translate(-50%, -50%) scale(1.08);
}

.convergence-core img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.source-label,
.convergence-status,
.structured-output {
  position: absolute;
  z-index: 4;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.17em;
  line-height: 1;
  text-transform: uppercase;
  pointer-events: none;
}

.source-label {
  display: inline-flex;
  min-height: 30px;
  padding: 7px 9px;
  align-items: center;
  gap: 7px;
  color: #5f5f5a;
  border: 1px solid rgba(17, 17, 17, 0.12);
  border-radius: 999px;
  background: rgba(247, 247, 245, 0.85);
  transition: opacity 420ms ease, transform 620ms var(--ease-out), border-color 260ms ease;
}

.source-label img {
  width: 14px;
  height: 14px;
}

.customer-source-icon {
  position: relative;
  width: 14px;
  height: 11px;
  border: 1.5px solid currentColor;
  border-radius: 4px;
}

.customer-source-icon::after {
  position: absolute;
  bottom: -4px;
  left: 3px;
  width: 4px;
  height: 4px;
  border-bottom: 1.5px solid currentColor;
  border-left: 1.5px solid currentColor;
  content: "";
  transform: skewY(-35deg);
}

.source-label--a { top: 12%; left: 6%; }
.source-label--b { top: 33%; left: 13%; }
.source-label--c { top: 57%; left: 6%; }
.source-label--d { top: 77%; left: 13%; }

.convergence-field[data-phase="converging"] .source-label,
.convergence-field[data-phase="resolving"] .source-label {
  opacity: 0.42;
  transform: translate3d(4px, 0, 0) scale(0.96);
}

.convergence-field[data-phase="structured"] .source-label {
  opacity: 0.62;
  transform: translate3d(4px, 0, 0) scale(0.96);
}

.convergence-field[data-learning-state="listening"] .source-label,
.convergence-field[data-learning-state="ingesting"] .source-label {
  opacity: 0.82;
  border-color: rgba(255, 106, 42, 0.28);
}

.convergence-field[data-learning-state="updating"] .convergence-core {
  filter: drop-shadow(0 0 34px rgba(255, 106, 42, 0.52));
  transform: translate(-50%, -50%) scale(1.07);
}

.convergence-field[data-learning-state="integrating"] .structured-output span {
  color: var(--orange-ink);
  border-color: rgba(255, 106, 42, 0.34);
}

.convergence-status {
  bottom: 6%;
  left: 6%;
  color: var(--orange-ink);
  white-space: nowrap;
}

.structured-output {
  right: 6%;
  bottom: 6%;
  display: grid;
  width: 32%;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 5px;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 320ms ease, transform 500ms var(--ease-out);
}

.structured-output span {
  padding: 5px 6px;
  color: #5e5e59;
  border: 1px solid rgba(17, 17, 17, 0.11);
  border-radius: 4px;
  background: rgba(247, 247, 245, 0.78);
  font-size: 8px;
  text-align: center;
}

.convergence-field:not([data-phase="structured"]) .structured-output {
  opacity: 0;
  transform: translateY(12px);
}

.convergence-replay {
  position: absolute;
  z-index: 6;
  top: 16px;
  right: 16px;
  display: inline-flex;
  min-height: 44px;
  padding: 9px 12px;
  align-items: center;
  gap: 7px;
  color: #595954;
  border: 1px solid rgba(17, 17, 17, 0.12);
  border-radius: 999px;
  background: rgba(247, 247, 245, 0.84);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.convergence-replay:hover {
  color: var(--ink);
  border-color: rgba(255, 106, 42, 0.45);
}

.convergence-field.is-static .convergence-replay {
  display: none;
}

.hero [data-hero-cta]:hover,
.hero [data-hero-cta]:focus-visible {
  transform: none;
}

.hero-meta {
  position: absolute;
  z-index: 3;
  right: 0;
  bottom: 28px;
  left: 0;
  display: flex;
  gap: 28px;
  color: #5f5f5a;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.15em;
}

/* ---------- Problem ---------- */

.problem {
  border-top: 1px solid var(--grid-soft);
  background: var(--paper);
}

.problem-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(330px, 0.8fr);
  gap: clamp(42px, 7vw, 108px);
  align-items: start;
}

.consequence-list {
  max-width: 34em;
  margin-top: 8px;
  list-style: none;
}

.consequence-list li {
  display: grid;
  min-height: 74px;
  grid-template-columns: 34px 1fr;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--grid-gray);
  font-family: var(--font-display);
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 600;
  letter-spacing: -0.018em;
}

.consequence-list li:first-child {
  border-top: 1px solid var(--grid-gray);
}

.consequence-list li span {
  color: var(--orange-ink);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.12em;
}

/* ---------- Product proof ---------- */

.demo {
  background:
    radial-gradient(circle at 52% 45%, rgba(255, 106, 42, 0.08), transparent 28%),
    var(--ink);
}

.demo-heading {
  display: flex;
  margin-bottom: clamp(44px, 5vw, 72px);
  align-items: flex-end;
  justify-content: space-between;
  gap: 34px;
}

.demo-heading > div:first-child {
  max-width: 780px;
}

.demo-intro {
  max-width: 54ch;
  margin-top: 24px;
  color: var(--dark-muted);
}

.demo-toggle {
  display: inline-flex;
  flex: 0 0 auto;
  padding: 4px;
  border: 1px solid var(--dark-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.035);
}

.demo-toggle button {
  min-height: 44px;
  padding: 10px 18px;
  color: var(--dark-muted);
  border: 0;
  border-radius: 7px;
  background: transparent;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
}

.demo-toggle button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--white);
}

.demo-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 76px minmax(0, 1fr);
}

.demo-panel {
  min-height: 340px;
  padding: clamp(25px, 3vw, 38px);
  border: 1px solid var(--dark-line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.035);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.05);
}

.panel-label {
  display: block;
  margin-bottom: 18px;
  color: #aaa9a3;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.19em;
}

.agent-panel h3 {
  margin-bottom: 24px;
}

.code-lines {
  display: grid;
  gap: 10px;
  margin-bottom: 28px;
}

.code-lines i {
  height: 8px;
  border-radius: 3px;
  background: #30302f;
}

.code-lines i:nth-child(1) { width: 72%; }
.code-lines i:nth-child(2) { width: 88%; }
.code-lines i:nth-child(3) { width: 55%; }
.code-lines i:nth-child(4) { width: 80%; }
.code-lines i:nth-child(5) { width: 40%; }

.agent-state,
.result-state {
  padding-top: 18px;
  border-top: 1px solid var(--dark-line);
  color: var(--glow-coral);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.025em;
}

.result-state {
  color: var(--dark-muted);
  font-family: var(--font-body);
  font-size: 14px;
}

.result-state strong {
  margin-right: 5px;
  color: var(--glow-coral);
}

.intervention-seam {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.intervention-seam::before {
  position: absolute;
  top: -12px;
  bottom: -12px;
  left: 50%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--glow-coral), #fff, var(--signal-orange), transparent);
  box-shadow: 0 0 28px rgba(255, 106, 42, 0.55);
  content: "";
  transition: opacity 300ms ease;
}

.intervention-seam span {
  position: relative;
  z-index: 1;
  display: grid;
  width: 50px;
  height: 50px;
  padding: 4px;
  place-items: center;
  border: 1px solid rgba(255, 143, 107, 0.3);
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 28px rgba(255, 106, 42, 0.22);
}

.intervention-seam img {
  width: 42px;
  height: 42px;
  padding: 3px;
  border-radius: 50%;
  background: var(--cloud);
}

.packet-items {
  display: grid;
  gap: 9px;
  margin-bottom: 24px;
  list-style: none;
}

.packet-items li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 12px;
  color: #bbb9b3;
  border: 1px solid var(--dark-line);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.18);
  font-size: 13px;
  transition: opacity 280ms ease, transform 280ms ease;
}

.packet-items li span {
  flex: 0 0 auto;
  color: var(--glow-coral);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.13em;
}

.demo-stage.is-without .intervention-seam::before {
  opacity: 0.12;
}

.demo-stage.is-without .packet-items li {
  opacity: 0.18;
  transform: translateX(5px);
}

.demo-stage.is-without .agent-state,
.demo-stage.is-without .result-state strong {
  color: #db6c5e;
}

.demo-cta {
  display: flex;
  margin-top: 34px;
  padding-top: 28px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--dark-line);
}

.demo-cta p {
  max-width: 62ch;
  color: var(--dark-muted);
}

/* ---------- Cohort strip ---------- */

.partner-strip {
  color: var(--ink);
  border-block: 1px solid rgba(255, 106, 42, 0.25);
  background: #fff1e9;
}

.partner-strip__inner {
  display: flex;
  min-height: 82px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-block: 15px;
}

.partner-strip p {
  color: var(--ink-soft);
  font-size: 15px;
}

.partner-strip strong {
  color: var(--ink);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--signal-orange);
  box-shadow: 0 0 0 5px rgba(255, 106, 42, 0.12);
  vertical-align: 1px;
  animation: status-pulse 2.8s ease-in-out infinite;
}

@keyframes status-pulse {
  50% { box-shadow: 0 0 0 9px rgba(255, 106, 42, 0); }
}

/* ---------- Fragment field ---------- */

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

.fragment-field {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--grid-gray);
  border-radius: var(--radius-md);
  background-color: var(--cloud);
  background-image: radial-gradient(circle, rgba(17, 17, 17, 0.16) 0.8px, transparent 0.9px);
  background-size: 18px 18px;
}

.fragment-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.fragment-lines path {
  fill: none;
  stroke: rgba(17, 17, 17, 0.19);
  stroke-width: 1;
  stroke-dasharray: 5 7;
}

.fragment {
  position: absolute;
  max-width: 235px;
  padding: 14px 16px;
  border: 1px solid var(--grid-gray);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.07);
  font-size: 13px;
  line-height: 1.45;
}

.fragment span {
  display: flex;
  margin-bottom: 7px;
  align-items: center;
  gap: 6px;
  color: #74746f;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.13em;
}

.fragment span img {
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
}

.fragment code {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
}

.fragment--slack { top: 8%; left: 4%; transform: rotate(-1.2deg); }
.fragment--github { top: 6%; right: 5%; transform: rotate(0.8deg); }
.fragment--support { bottom: 10%; left: 3%; transform: rotate(0.6deg); }
.fragment--decision { right: 4%; bottom: 12%; transform: rotate(-0.9deg); }

.context-packet {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 252px;
  padding: 21px 22px;
  color: var(--white);
  border: 1px solid rgba(255, 106, 42, 0.5);
  border-radius: 10px;
  background: var(--ink);
  box-shadow: 0 18px 70px rgba(255, 106, 42, 0.22);
  transform: translate(-50%, -50%);
}

.packet-state {
  display: block;
  margin-bottom: 10px;
  color: var(--glow-coral);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
}

.context-packet strong {
  font-family: var(--font-display);
  font-size: 17px;
}

.context-packet ul {
  margin-top: 13px;
  color: var(--dark-muted);
  font-size: 12px;
  list-style: none;
}

.context-packet li {
  padding-block: 6px;
  border-top: 1px solid var(--dark-line);
}

/* ---------- Context layer ---------- */

.context-layer {
  border-top: 1px solid var(--grid-soft);
}

.context-grid,
.memory-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(48px, 8vw, 112px);
}

.not-list {
  margin-top: 32px;
  color: #64645e;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.055em;
  line-height: 2;
}

.context-object {
  position: relative;
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1;
  margin-inline: auto;
  border: 1px solid var(--grid-gray);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 143, 107, 0.14), transparent 42%);
}

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

.context-object::before {
  top: 50%;
  right: 8%;
  left: 8%;
  height: 1px;
  background: var(--grid-gray);
}

.context-object::after {
  top: 8%;
  bottom: 8%;
  left: 50%;
  width: 1px;
  background: var(--grid-gray);
}

.context-core {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  width: 46%;
  height: 46%;
  object-fit: contain;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 0 24px rgba(255, 106, 42, 0.2));
}

.quality {
  position: absolute;
  z-index: 3;
  padding: 7px 10px;
  color: #555550;
  border: 1px solid var(--grid-gray);
  border-radius: 999px;
  background: rgba(247, 247, 245, 0.93);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  white-space: nowrap;
}

.quality:nth-of-type(1) { top: 0; left: 50%; transform: translate(-50%, -50%); }
.quality:nth-of-type(2) { top: 24%; right: -3%; }
.quality:nth-of-type(3) { right: -1%; bottom: 23%; }
.quality:nth-of-type(4) { bottom: 0; left: 50%; transform: translate(-50%, 50%); }
.quality:nth-of-type(5) { bottom: 23%; left: -2%; }
.quality:nth-of-type(6) { top: 24%; left: -5%; }

/* ---------- Pipeline ---------- */

.system {
  background: var(--paper);
}

.system-track-wrap {
  position: relative;
  padding-top: 20px;
}

.system-signal {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, rgba(255, 106, 42, 0.12), var(--signal-orange), var(--glow-coral));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.1s var(--ease-out);
}

.js .in-view .system-signal {
  transform: scaleX(1);
}

.system-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(22px, 3vw, 42px);
  list-style: none;
}

.system-track li {
  padding-top: 26px;
  border-top: 1px solid var(--grid-gray);
}

.stage-number,
.p-index {
  color: var(--orange-ink);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.system-track h3 {
  margin-block: 12px 10px;
}

.system-track p {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.7;
}

.pipeline-source-marks {
  display: flex;
  min-height: 28px;
  margin-block: 14px 8px;
  align-items: center;
  gap: 9px;
}

.pipeline-source-marks img {
  width: 18px;
  height: 18px;
  opacity: 0.78;
}

/* ---------- Trust ---------- */

.principle-list {
  list-style: none;
}

.principle-list li {
  display: grid;
  min-height: 102px;
  grid-template-columns: 64px minmax(220px, 0.85fr) minmax(300px, 1.2fr) 180px;
  align-items: center;
  gap: 20px;
  border-top: 1px solid var(--grid-gray);
}

.principle-list li:last-child {
  border-bottom: 1px solid var(--grid-gray);
}

.principle-list p {
  color: var(--ink-soft);
}

.principle-list small {
  color: #64645e;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.11em;
  text-align: right;
}

/* ---------- Use cases ---------- */

.use-cases {
  padding-bottom: clamp(96px, 11vw, 154px);
}

.poster-track {
  display: grid;
  width: min(1500px, calc(100% - 32px));
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-inline: auto;
}

.use-poster {
  display: flex;
  min-height: 400px;
  flex-direction: column;
  padding: clamp(23px, 2.4vw, 34px);
  overflow: hidden;
  color: var(--ink);
  border: 1px solid rgba(17, 17, 17, 0.13);
  border-radius: 10px;
  background: var(--cloud);
}

.use-poster::before {
  width: 54px;
  height: 54px;
  margin-bottom: auto;
  border-radius: 50%;
  background:
    linear-gradient(var(--signal-orange), var(--signal-orange)) center / 100% 1px no-repeat,
    linear-gradient(var(--signal-orange), var(--signal-orange)) center / 1px 100% no-repeat,
    radial-gradient(circle, #fff 0 5%, var(--signal-orange) 7%, transparent 26%);
  content: "";
}

.use-poster > span,
.use-poster small {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.13em;
}

.use-poster > span {
  margin-bottom: 18px;
}

.use-poster h3 {
  margin-bottom: 15px;
}

.use-poster p {
  margin-bottom: 28px;
  color: currentColor;
  font-size: 14px;
  line-height: 1.55;
  opacity: 0.78;
}

.use-poster small {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid currentColor;
  opacity: 0.82;
}

.poster--orange {
  background: var(--signal-orange);
}

.poster--orange::before {
  filter: grayscale(1) brightness(5);
}

.poster--coral {
  background: var(--glow-coral);
}

.poster--neutral {
  background: #e8e8e3;
}

.poster--ink {
  color: var(--white);
  background: var(--ink);
}

.poster--grid {
  background-color: var(--cloud);
  background-image: radial-gradient(circle, rgba(17, 17, 17, 0.13) 0.8px, transparent 0.9px);
  background-size: 16px 16px;
}

/* ---------- Memory ---------- */

.memory {
  border-top: 1px solid var(--grid-soft);
  background: var(--paper);
}

.memory-field {
  position: relative;
  min-height: 300px;
  padding: 26px;
  border: 1px solid var(--grid-gray);
  border-radius: var(--radius-md);
  background: rgba(247, 247, 245, 0.74);
}

.memory-line {
  position: absolute;
  top: 50%;
  right: 8%;
  left: 8%;
  height: 1px;
  background: var(--grid-gray);
}

.memory-line i {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--grid-gray);
  transform: translate(-50%, -50%);
}

.memory-line i:nth-child(1) { left: 0; }
.memory-line i:nth-child(2) { left: 25%; }
.memory-line i:nth-child(3) { left: 50%; background: var(--glow-coral); }
.memory-line i:nth-child(4) { left: 75%; background: var(--signal-orange); }
.memory-line i:nth-child(5) { left: 100%; background: var(--signal-orange); box-shadow: 0 0 0 8px rgba(255, 106, 42, 0.12); }

.memory-state {
  position: absolute;
  top: 24px;
  left: 26px;
  max-width: 220px;
}

.memory-state span,
.memory-state strong,
.memory-state small {
  display: block;
}

.memory-state span {
  margin-bottom: 5px;
  color: #64645e;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
}

.memory-state strong {
  font-family: var(--font-display);
  font-size: 17px;
}

.memory-state small {
  color: #64645e;
  font-size: 12px;
}

.memory-state--final {
  top: auto;
  right: 26px;
  bottom: 24px;
  left: auto;
  text-align: right;
}

/* ---------- FAQ ---------- */

.faq {
  border-top: 1px solid var(--grid-gray);
}

.faq-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(42px, 8vw, 118px);
}

.faq-intro {
  align-self: start;
}

.faq-mark {
  display: block;
  width: 72px;
  height: 72px;
  margin-bottom: 30px;
  padding: 4px;
  border: 1px solid var(--grid-gray);
  border-radius: 16px;
  background: var(--cloud);
  object-fit: contain;
}

.faq-list {
  border-top: 1px solid var(--grid-gray);
}

.faq-list details {
  border-bottom: 1px solid var(--grid-gray);
}

.faq-list summary {
  position: relative;
  display: flex;
  min-height: 72px;
  padding: 21px 54px 21px 0;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: clamp(18px, 1.55vw, 23px);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.2;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary > span {
  position: absolute;
  top: 50%;
  right: 8px;
  width: 26px;
  height: 26px;
  border: 1px solid rgba(17, 17, 17, 0.18);
  border-radius: 50%;
  transform: translateY(-50%);
}

.faq-list summary > span::before,
.faq-list summary > span::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1px;
  background: var(--ink);
  content: "";
  transform: translate(-50%, -50%);
  transition: transform 180ms ease;
}

.faq-list summary > span::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-list details[open] summary > span::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-list summary:hover {
  color: var(--orange-ink);
}

.faq-list summary:focus-visible {
  outline: 2px solid var(--signal-orange);
  outline-offset: 4px;
}

.faq-list details p {
  max-width: 62ch;
  padding: 0 54px 24px 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.7;
}

.faq-cta {
  display: flex;
  grid-column: 1 / -1;
  min-height: 92px;
  margin-top: 6px;
  padding: 22px 24px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 1px solid rgba(255, 106, 42, 0.3);
  border-radius: 12px;
  background: #fff3ec;
}

.faq-cta p {
  font-family: var(--font-display);
  font-size: clamp(18px, 1.7vw, 24px);
  font-weight: 600;
  letter-spacing: -0.025em;
}

/* ---------- Final CTA / footer ---------- */

.final-cta {
  text-align: center;
  background:
    radial-gradient(circle at 50% 0, rgba(255, 106, 42, 0.14), transparent 36%),
    var(--ink);
}

.final-seam {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(180deg, #fff, var(--signal-orange) 18%, rgba(255, 106, 42, 0.1) 55%, transparent);
  box-shadow: 0 0 38px rgba(255, 106, 42, 0.35);
  pointer-events: none;
}

.final-inner {
  position: relative;
  max-width: 920px;
  margin-inline: auto;
}

.final-mark {
  display: block;
  width: 108px;
  height: 108px;
  margin: -8px auto 18px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 24px;
  background: rgba(247, 247, 245, 0.96);
  box-shadow: 0 0 42px rgba(255, 106, 42, 0.18);
  object-fit: contain;
}

.cta-meta {
  display: flex;
  margin-bottom: 34px;
  justify-content: center;
  gap: 28px;
  color: var(--glow-coral);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.17em;
}

.cta-alt {
  margin-top: 24px;
  color: var(--dark-muted);
  font-size: 14px;
}

.site-footer {
  padding-block: 54px;
  color: #a5a49e;
  border-top: 1px solid var(--dark-line);
  background: var(--ink);
}

.site-footer .wordmark {
  color: var(--white);
}

.site-footer .wordmark img {
  padding: 3px;
  border-radius: 8px;
  background: var(--cloud);
}

.footer-grid {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 36px;
  flex-wrap: wrap;
}

.footer-grid p {
  margin-top: 8px;
  font-size: 13px;
}

.footer-grid nav {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-grid nav a {
  min-height: 44px;
  padding-block: 10px;
  color: #aaa9a3;
  font-size: 13px;
  text-decoration: none;
}

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

.footer-coord {
  padding-top: 10px;
  color: #96958f;
}

/* ---------- Mobile conversion CTA ---------- */

.mobile-sticky {
  position: fixed;
  z-index: 80;
  right: 12px;
  bottom: calc(12px + env(safe-area-inset-bottom));
  left: 12px;
  display: none;
  visibility: hidden;
  padding: 7px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 12px;
  background: rgba(247, 247, 245, 0.91);
  box-shadow: 0 14px 44px rgba(17, 17, 17, 0.16);
  opacity: 0;
  transform: translateY(130%);
  transition: opacity 220ms ease, transform 320ms var(--ease-out), visibility 220ms;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.mobile-sticky .button {
  width: 100%;
}

.mobile-sticky.is-visible {
  visibility: visible;
  opacity: 1;
  transform: none;
}

body.is-dialog-open .mobile-sticky {
  visibility: hidden;
  opacity: 0;
  transform: translateY(130%);
}

/* ---------- Booking dialog ---------- */

.demo-dialog {
  position: fixed;
  width: min(940px, calc(100vw - 32px));
  max-width: none;
  max-height: min(92svh, 900px);
  margin: auto;
  padding: 0;
  overflow: hidden;
  color: var(--ink);
  border: 1px solid rgba(17, 17, 17, 0.12);
  border-radius: 20px;
  background: var(--cloud);
  box-shadow: 0 34px 120px rgba(17, 17, 17, 0.32);
}

.demo-dialog::backdrop {
  background: rgba(17, 17, 17, 0.72);
  -webkit-backdrop-filter: blur(7px);
  backdrop-filter: blur(7px);
}

.demo-dialog[open] {
  animation: dialog-enter 420ms var(--ease-out) both;
}

@keyframes dialog-enter {
  from { opacity: 0; transform: translateY(18px) scale(0.985); }
}

.dialog-shell {
  display: flex;
  max-height: min(92svh, 900px);
  flex-direction: column;
}

.dialog-header {
  display: flex;
  min-height: 68px;
  padding-inline: clamp(18px, 3vw, 34px);
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--grid-soft);
}

.dialog-brand {
  font-size: 19px;
}

.dialog-brand img {
  width: 30px;
  height: 30px;
}

.dialog-close {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--ink);
  border: 1px solid var(--grid-gray);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  font-size: 25px;
  line-height: 1;
}

.dialog-content {
  overflow: auto;
  overscroll-behavior: contain;
}

.funnel-step {
  min-height: 560px;
  padding: clamp(30px, 5vw, 64px);
}

.funnel-step > p:not(.eyebrow, .calendar-loading) {
  max-width: 58ch;
  margin-top: 18px;
  color: var(--ink-soft);
}

.funnel-step--lead {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(330px, 1.1fr);
  column-gap: clamp(38px, 6vw, 78px);
  align-content: center;
}

.funnel-step--lead .eyebrow,
.funnel-step--lead h2,
.funnel-step--lead > p,
.funnel-step--lead .demo-agenda {
  grid-column: 1;
}

.funnel-step--lead h2 {
  font-size: clamp(38px, 5vw, 60px);
}

.demo-agenda {
  display: grid;
  gap: 0;
  margin-top: 28px;
  list-style: none;
}

.demo-agenda li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 12px;
  padding-block: 11px;
  color: var(--ink-soft);
  border-top: 1px solid var(--grid-gray);
  font-size: 13px;
}

.demo-agenda li:last-child {
  border-bottom: 1px solid var(--grid-gray);
}

.demo-agenda span {
  color: var(--orange-ink);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.lead-form {
  display: grid;
  grid-column: 2;
  grid-row: 1 / span 5;
  align-self: center;
  gap: 18px;
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--grid-gray);
  border-radius: 16px;
  background: var(--white);
  box-shadow: var(--shadow-soft);
}

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

.form-field label {
  color: #53534f;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.form-field input {
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  color: var(--ink);
  border: 1px solid var(--grid-gray);
  border-radius: 8px;
  background: var(--cloud);
  font-size: 16px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.form-field input:focus {
  border-color: var(--signal-orange);
  box-shadow: 0 0 0 3px rgba(255, 106, 42, 0.12);
}

.form-field input[aria-invalid="true"] {
  border-color: var(--error);
}

.lead-form .button {
  width: 100%;
}

.lead-form.is-submitting {
  cursor: wait;
}

.lead-form.is-submitting .button {
  opacity: 0.72;
  pointer-events: none;
}

.form-note {
  color: #74746f;
  font-size: 11px;
  line-height: 1.5;
  text-align: center;
}

.form-status {
  min-height: 1.4em;
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.4;
  text-align: center;
}

.form-status[data-state="error"] {
  color: var(--error);
}

.form-status[data-state="success"] {
  color: var(--success);
}

.form-status a {
  color: currentColor;
  font-weight: 600;
  text-underline-offset: 3px;
}

.honeypot {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
}

.funnel-step--calendar,
.funnel-step--booked {
  text-align: center;
}

.funnel-step--calendar h2,
.funnel-step--booked h2 {
  font-size: clamp(40px, 5vw, 62px);
}

.calendar-loading {
  margin-top: 20px;
  color: var(--ink-soft);
}

.cal-container {
  width: 100%;
  min-height: 560px;
  margin-top: 28px;
  overflow: hidden;
  border: 1px solid var(--grid-gray);
  border-radius: 12px;
  background: var(--white);
}

.calendar-fallback {
  max-width: 580px;
  margin: 36px auto 0;
  padding: 28px;
  border: 1px solid var(--grid-gray);
  border-radius: 12px;
  background: var(--white);
}

.calendar-fallback .button-row {
  justify-content: center;
}

.funnel-step--booked {
  display: grid;
  place-items: center;
  align-content: center;
}

.funnel-step--booked img {
  margin-bottom: 24px;
}

.funnel-step--booked .button {
  margin-top: 30px;
}

.dialog-fallback {
  padding: 15px 24px;
  color: #64645e;
  border-top: 1px solid var(--grid-soft);
  font-size: 11px;
  text-align: center;
}

.dialog-fallback a {
  color: var(--ink);
  text-underline-offset: 3px;
}

.noscript {
  position: fixed;
  z-index: 130;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 12px 20px;
  color: var(--white);
  background: var(--ink);
  font-size: 13px;
  text-align: center;
}

.noscript a {
  color: var(--glow-coral);
}

/* ---------- Reveal motion ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 720ms var(--ease-out), transform 720ms var(--ease-out);
}

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

/* ---------- Responsive ---------- */

@media (max-width: 1120px) {
  .metadata-rail {
    display: none;
  }

  .principle-list li {
    grid-template-columns: 52px minmax(200px, 0.8fr) minmax(260px, 1.2fr);
  }

  .principle-list small {
    grid-column: 2 / -1;
    padding-bottom: 18px;
    text-align: left;
  }

  .poster-track {
    width: calc(100% - 24px);
    grid-template-columns: repeat(5, minmax(200px, 1fr));
    overflow-x: auto;
    scroll-snap-type: x proximity;
    padding-bottom: 10px;
  }

  .use-poster {
    scroll-snap-align: start;
  }
}

@media (max-width: 920px) {
  .nav-actions {
    display: none;
  }

  .mobile-only,
  .menu-toggle {
    display: flex;
  }

  .menu-toggle {
    margin-left: auto;
  }

  .nav-links {
    position: fixed;
    z-index: 95;
    top: 72px;
    right: 0;
    left: 0;
    display: flex;
    visibility: hidden;
    padding: 16px 20px 26px;
    align-items: stretch;
    flex-direction: column;
    gap: 2px;
    border-bottom: 1px solid rgba(17, 17, 17, 0.1);
    background: rgba(247, 247, 245, 0.98);
    box-shadow: 0 18px 36px rgba(17, 17, 17, 0.09);
    opacity: 0;
    transform: translateY(-12px);
    transition: opacity 200ms ease, transform 240ms var(--ease-out), visibility 200ms;
  }

  .nav-links.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .nav-links > a:not(.button) {
    min-height: 48px;
    padding: 12px 4px;
    font-size: 16px;
  }

  .mobile-only {
    margin-top: 12px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.85fr);
    gap: 30px;
  }

  .hero-copy h1 {
    font-size: clamp(46px, 6.5vw, 58px);
  }

  .convergence-field {
    min-height: 400px;
  }

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

  .demo-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .context-grid,
  .memory-grid {
    grid-template-columns: 1fr;
  }

  .faq-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .faq-intro {
    max-width: 680px;
  }

  .context-object {
    max-width: 440px;
  }

  .system-track {
    grid-template-columns: repeat(2, 1fr);
  }

  .funnel-step--lead {
    grid-template-columns: 1fr;
  }

  .lead-form {
    grid-column: 1;
    grid-row: auto;
    margin-top: 30px;
  }
}

@media (max-width: 760px) {
  :root {
    --shell-pad: 20px;
  }

  body {
    font-size: 16px;
  }

  section {
    padding-block: 84px;
  }

  .nav {
    height: 68px;
  }

  .nav-links {
    position: fixed;
    z-index: 95;
    top: 68px;
    right: 0;
    left: 0;
    display: flex;
    visibility: hidden;
    padding: 16px 20px 26px;
    align-items: stretch;
    flex-direction: column;
    gap: 2px;
    border-bottom: 1px solid rgba(17, 17, 17, 0.1);
    background: rgba(247, 247, 245, 0.98);
    box-shadow: 0 18px 36px rgba(17, 17, 17, 0.09);
    opacity: 0;
    transform: translateY(-12px);
    transition: opacity 200ms ease, transform 240ms var(--ease-out), visibility 200ms;
  }

  .nav-links.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .nav-links > a:not(.button) {
    min-height: 48px;
    padding: 12px 4px;
    font-size: 16px;
  }

  .nav-actions {
    display: none;
  }

  .mobile-only,
  .menu-toggle,
  .mobile-sticky {
    display: flex;
  }

  .mobile-only {
    margin-top: 12px;
  }

  .menu-toggle {
    margin-left: auto;
  }

  .hero {
    min-height: auto;
    padding-top: 94px;
    padding-bottom: 58px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-copy {
    order: 1;
  }

  .hero-copy .eyebrow {
    margin-bottom: 14px;
  }

  .hero-copy h1 {
    max-width: none;
    font-size: clamp(45px, 11.5vw, 54px);
    line-height: 0.92;
  }

  .hero-copy .lede {
    max-width: 32em;
    margin-top: 20px;
    font-size: 18px;
    line-height: 1.46;
  }

  .hero-actions {
    margin-top: 24px;
    gap: 8px 14px;
  }

  .hero-actions .button {
    flex: 1 0 100%;
  }

  .hero-proof-link {
    min-height: 40px;
    font-size: 14px;
  }

  .hero .trust-line {
    margin-top: 12px;
    line-height: 1.45;
  }

  .convergence-field {
    order: 2;
    min-height: 0;
    aspect-ratio: 1.16;
    margin-top: 6px;
    border-radius: 20px;
  }

  .hero-meta {
    position: relative;
    bottom: auto;
    margin-top: 24px;
    flex-wrap: wrap;
    gap: 10px 18px;
  }

  .demo-stage {
    grid-template-columns: 1fr;
  }

  .intervention-seam {
    height: 64px;
  }

  .intervention-seam::before {
    top: 50%;
    right: -10px;
    bottom: auto;
    left: -10px;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glow-coral), #fff, var(--signal-orange), transparent);
  }

  .intervention-seam span {
    width: 46px;
    height: 46px;
    padding: 3px;
  }

  .demo-cta,
  .partner-strip__inner {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .fragment-field {
    min-height: auto;
    padding-block: 6px;
  }

  .fragment-lines {
    display: none;
  }

  .fragment {
    position: relative;
    inset: auto;
    max-width: none;
    margin: 12px 14px;
    transform: none;
  }

  .context-packet {
    position: relative;
    top: auto;
    left: auto;
    width: auto;
    margin: 18px 14px;
    transform: none;
  }

  .system-track {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .system-track li {
    padding-block: 22px;
  }

  .system-signal {
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, rgba(255, 106, 42, 0.12), var(--signal-orange), var(--glow-coral));
    transform: scaleY(0);
    transform-origin: top;
  }

  .js .in-view .system-signal {
    transform: scaleY(1);
  }

  .principle-list li {
    min-height: auto;
    grid-template-columns: 42px 1fr;
    gap: 10px 14px;
    padding-block: 22px;
  }

  .principle-list p,
  .principle-list small {
    grid-column: 2;
  }

  .principle-list small {
    padding-bottom: 0;
  }

  .poster-track {
    width: 100%;
    padding-inline: 20px;
    grid-template-columns: repeat(5, minmax(260px, 78vw));
  }

  .use-poster {
    min-height: 360px;
  }

  .demo-dialog {
    width: 100%;
    height: 100svh;
    max-height: 100svh;
    margin: auto 0 0;
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 20px 20px 0 0;
  }

  .dialog-shell {
    max-height: 100svh;
  }

  .funnel-step {
    min-height: auto;
    padding: 28px 20px 38px;
  }

  .cal-container {
    min-height: 620px;
  }

  .footer-grid {
    flex-direction: column;
  }

  .footer-grid nav {
    flex-direction: column;
    gap: 2px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: clamp(48px, 15vw, 66px);
  }

  h2 {
    font-size: clamp(37px, 11vw, 50px);
  }

  .button-row .button {
    width: 100%;
  }

  .convergence-field {
    aspect-ratio: 1.16;
  }

  .source-label {
    min-height: 27px;
    padding: 6px 7px;
    gap: 5px;
    font-size: 8px;
  }

  .source-label img {
    width: 12px;
    height: 12px;
  }

  .source-label--b,
  .source-label--d {
    left: 10%;
  }

  .convergence-replay {
    top: 10px;
    right: 10px;
    padding-inline: 10px;
  }

  .structured-output {
    right: 4%;
    bottom: 5%;
    width: 35%;
  }

  .convergence-status {
    bottom: 5%;
    left: 4%;
    font-size: 7px;
  }

  .faq-mark {
    width: 60px;
    height: 60px;
    margin-bottom: 22px;
  }

  .faq-list summary {
    min-height: 68px;
    padding-right: 44px;
    font-size: 18px;
  }

  .faq-list details p {
    padding-right: 36px;
  }

  .faq-cta {
    padding: 20px;
  }

  .quality {
    padding: 5px 7px;
    font-size: 7px;
  }

  .cta-meta {
    flex-wrap: wrap;
    gap: 10px 18px;
  }

  .demo-toggle {
    width: 100%;
  }

  .demo-toggle button {
    flex: 1;
  }

  .calendar-fallback .button-row .button {
    width: 100%;
  }
}

/* ---------- Reduced motion ---------- */

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

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

  .js .reveal {
    opacity: 1;
    transform: none;
  }

  .js .system-signal {
    transform: none;
  }
}