:root {
  --bg: #040a0f;
  --bg-soft: #07151b;
  --surface: rgba(7, 22, 28, 0.93);
  --surface-strong: #0a1d24;
  --surface-light: #0e2730;
  --line: rgba(115, 227, 216, 0.14);
  --line-strong: rgba(115, 227, 216, 0.25);
  --text: #f0f6f5;
  --muted: #8da3a6;
  --muted-strong: #bdcbca;
  --aqua: #73e3d8;
  --aqua-dark: #15373c;
  --aqua-glow: rgba(115, 227, 216, 0.12);
  --amber: #c58f59;
  --danger: #ff8e86;
  --danger-bg: rgba(113, 30, 32, 0.22);
  --display: "Bahnschrift", "DIN Alternate", "Segoe UI Variable Display", "Segoe UI", sans-serif;
  --sans: "Segoe UI Variable Text", "Aptos", "Segoe UI", Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --radius-xl: 26px;
  --radius-lg: 22px;
  --radius-md: 14px;
  --max-width: 1660px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
  background: var(--bg);
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

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

p,
h1,
h2,
h3,
span,
strong,
summary,
button,
label {
  overflow-wrap: anywhere;
}

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

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

button {
  border: 0;
}

button:not(:disabled),
summary,
label,
a {
  cursor: pointer;
}

button:disabled,
input:disabled {
  cursor: not-allowed;
}

::selection {
  color: #031113;
  background: var(--aqua);
}

:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 10px;
  color: #041013;
  background: var(--aqua);
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

.site-shell {
  position: relative;
  isolation: isolate;
  width: min(100% - 40px, var(--max-width));
  margin-inline: auto;
}

.neural-backdrop {
  position: fixed;
  top: 0;
  right: 0;
  z-index: -1;
  width: min(72vw, 1180px);
  height: 100vh;
  object-fit: cover;
  object-position: right center;
  opacity: 0.2;
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.55) 38%, #000 76%);
  pointer-events: none;
}

.topbar {
  position: relative;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 82px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.brand-lockup,
.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(103, 225, 212, 0.32);
  border-radius: 14px;
  color: #b6fff6;
  background: #10272c;
  box-shadow: inset 0 0 0 1px rgba(122, 216, 208, 0.05);
  font-family: var(--display);
  font-size: 24px;
  font-weight: 700;
}

.brand-copy {
  display: grid;
  gap: 1px;
}

.eyebrow,
.kicker {
  margin: 0;
  color: var(--aqua);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1.4;
  text-transform: uppercase;
}

.brand-name {
  overflow: hidden;
  color: var(--text);
  font-family: var(--display);
  font-size: clamp(1rem, 1.6vw, 1.38rem);
  font-weight: 450;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-expansion {
  overflow: hidden;
  max-width: min(58vw, 760px);
  color: var(--muted);
  font-size: clamp(0.65rem, 0.72vw, 0.74rem);
  letter-spacing: 0.01em;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-expansion strong {
  color: var(--aqua);
  font-weight: 750;
}

.brand-name b {
  color: var(--aqua);
  font-family: var(--sans);
  font-weight: 400;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted-strong);
  font-size: 0.82rem;
}

.desktop-nav a,
.footer-meta a,
.text-link {
  position: relative;
  transition: color 160ms ease;
}

.desktop-nav a:hover,
.footer-meta a:hover,
.text-link:hover {
  color: var(--aqua);
}

.status-pill,
.privacy-badge {
  display: inline-flex;
  align-items: center;
  justify-self: end;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted-strong);
  background: rgba(2, 17, 19, 0.62);
  font-family: var(--mono);
  font-size: 0.68rem;
  white-space: nowrap;
}

.status-dot,
.pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  box-shadow: 0 0 0 5px rgba(142, 171, 168, 0.06);
}

.status-pill.is-live .status-dot,
.pulse.is-live {
  background: var(--aqua);
  box-shadow: 0 0 12px var(--aqua);
  animation: breathe 1.8s ease-in-out infinite;
}

main > section {
  border-bottom: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
  align-items: center;
  gap: clamp(40px, 8vw, 120px);
  min-height: min(760px, calc(100vh - 106px));
  padding: clamp(76px, 10vw, 142px) 0;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero h1 {
  max-width: 920px;
  margin: 22px 0 26px;
  font-family: var(--display);
  font-size: clamp(3.2rem, 7vw, 7rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.94;
}

.hero h1 em {
  color: var(--aqua);
  font-weight: 400;
}

.hero-lead {
  max-width: 730px;
  margin: 0;
  color: var(--muted-strong);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  margin-top: 38px;
}

.primary-link,
.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 54px;
  padding: 0 22px;
  border-radius: 12px;
  color: #031416;
  background: var(--aqua);
  box-shadow: 0 14px 40px rgba(43, 169, 160, 0.14);
  font-size: 0.88rem;
  font-weight: 850;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.primary-link:hover,
.primary-button:not(:disabled):hover {
  background: #82eee3;
  box-shadow: 0 16px 48px rgba(58, 206, 195, 0.2);
  transform: translateY(-2px);
}

.text-link {
  color: var(--muted-strong);
  font-size: 0.9rem;
  text-decoration: underline;
  text-decoration-color: rgba(103, 225, 212, 0.34);
  text-underline-offset: 6px;
}

.hero-footnote {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 24px 0 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.03em;
}

.hero-footnote span {
  color: var(--aqua);
  font-size: 0.52rem;
}

.hero-signal {
  position: relative;
  width: min(100%, 590px);
  aspect-ratio: 1;
  justify-self: end;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(45, 174, 163, 0.2), rgba(5, 20, 23, 0.02) 42%, transparent 66%);
  box-shadow: inset 0 0 90px rgba(60, 182, 173, 0.07);
}

.signal-grid {
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  opacity: 0.32;
  background-image:
    linear-gradient(rgba(103, 225, 212, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(103, 225, 212, 0.08) 1px, transparent 1px);
  background-size: 25px 25px;
  -webkit-mask-image: radial-gradient(circle, #000 25%, transparent 74%);
  mask-image: radial-gradient(circle, #000 25%, transparent 74%);
}

.signal-orbit,
.neural-orbit {
  position: absolute;
  inset: 50%;
  border: 1px solid rgba(103, 225, 212, 0.22);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.signal-orbit-a {
  width: 72%;
  height: 32%;
  transform: translate(-50%, -50%) rotate(18deg);
}

.signal-orbit-b {
  width: 70%;
  height: 30%;
  transform: translate(-50%, -50%) rotate(112deg);
}

.signal-orbit-c {
  width: 44%;
  height: 44%;
}

.signal-core,
.neural-core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 27%;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(103, 225, 212, 0.5);
  border-radius: 50%;
  color: #b5fff6;
  background: radial-gradient(circle, rgba(40, 108, 106, 0.96), rgba(8, 37, 40, 0.88));
  box-shadow: 0 0 65px rgba(70, 212, 199, 0.24), inset 0 0 30px rgba(103, 225, 212, 0.1);
  font-family: var(--display);
  font-size: clamp(3rem, 7vw, 6rem);
  transform: translate(-50%, -50%);
}

.signal-label {
  position: absolute;
  right: 13%;
  bottom: 18%;
  color: var(--aqua);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
}

.section-heading {
  margin-bottom: clamp(34px, 5vw, 68px);
}

.section-heading h2,
.conversation-heading h2,
.transparency-copy h2 {
  margin: 12px 0 0;
  font-family: var(--display);
  font-size: clamp(2.25rem, 4vw, 4.4rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.04;
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.7fr);
  align-items: end;
  gap: 60px;
}

.split-heading > p {
  max-width: 600px;
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.experience-section {
  padding: 14px 0 70px;
}

.experience-section .section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  margin-bottom: 12px;
}

.experience-section .section-heading h2 {
  margin: 0;
  font-size: clamp(1.45rem, 2vw, 2rem);
  letter-spacing: -0.018em;
}

.experience-section .section-heading .kicker {
  display: none;
}

.experience-section .section-heading > p {
  max-width: 500px;
  font-size: 0.76rem;
  line-height: 1.45;
}

.experience-intro {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(150px, 0.72fr);
  align-items: center;
  gap: 16px;
  max-width: 530px;
}

.experience-intro p {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.45;
}

.neural-signature {
  width: 100%;
  height: 58px;
  object-fit: cover;
  object-position: right center;
  border: 1px solid rgba(122, 216, 208, 0.14);
  border-radius: 16px;
  opacity: 0.72;
  filter: saturate(0.82) contrast(0.95);
}

.meaning-section,
.capabilities-section,
.process-section,
.transparency-section,
.faq-section {
  padding: clamp(80px, 10vw, 150px) 0;
}

.experience-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.15fr) minmax(340px, 0.78fr);
  gap: 16px;
  align-items: stretch;
}

.stage-card,
.conversation-card {
  position: relative;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(18px);
}

.stage-card::before,
.conversation-card::before {
  display: none;
}

.stage-card {
  display: flex;
  flex-direction: column;
  padding: clamp(12px, 1.4vw, 20px);
}

.stage-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.13em;
}

.stage-model {
  color: var(--amber);
}

.video-stage {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  background: #07161b;
  box-shadow: 0 0 0 1px rgba(122, 216, 208, 0.02);
}

.video-stage::after {
  display: none;
}

#avatar-video {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: auto;
  opacity: 0;
  transition: opacity 420ms ease;
}

.video-stage.is-active #avatar-video,
#avatar-video.is-live {
  opacity: 1;
}

.idle-presence {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 18px;
  background: #07161b;
  transition: opacity 320ms ease, visibility 320ms ease;
}

.idle-presence::before {
  display: none;
}

.idle-mark {
  width: clamp(68px, 10%, 94px);
  height: auto;
  opacity: 0.72;
}

.idle-presence p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.72rem, 1vw, 0.86rem);
  letter-spacing: 0.08em;
}

.connection-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--muted-strong);
  background: rgba(7, 22, 27, 0.96);
  text-align: center;
}

.connection-overlay strong {
  color: var(--text);
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 400;
}

.connection-overlay > span:last-child {
  font-size: 0.78rem;
}

.connection-progress {
  width: min(180px, 48%);
  height: 4px;
  margin: 0 0 12px;
  border: 0;
  accent-color: var(--aqua);
}

.stage-caption {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 0;
  border: 0;
  color: var(--muted-strong);
  background: transparent;
  font-size: 0.68rem;
}

.stage-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  margin-top: 9px;
  padding: 0 4px;
}

.stage-status-bar .status-pill {
  justify-self: auto;
  padding: 6px 10px;
  background: rgba(2, 17, 19, 0.38);
}

.error-panel {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 142, 134, 0.25);
  border-radius: 12px;
  color: #ffc3be;
  background: var(--danger-bg);
  font-size: 0.76rem;
}

.error-panel strong {
  flex: 0 0 auto;
}

.consent-row {
  margin-top: 15px;
  color: var(--muted-strong);
  font-size: 0.875rem;
  line-height: 1.55;
}

.consent-row label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.consent-row input {
  width: 18px;
  height: 18px;
  margin: 1px 0 0;
  accent-color: var(--aqua);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 15px;
}

.primary-button,
.danger-button,
.icon-button {
  min-height: 48px;
  padding: 0 17px;
  border-radius: 12px;
}

.primary-button:disabled,
.icon-button:disabled {
  opacity: 0.42;
}

.danger-button {
  color: #ffd5d1;
  border: 1px solid rgba(255, 142, 134, 0.28);
  background: rgba(103, 32, 33, 0.38);
  font-weight: 750;
}

.icon-button {
  color: var(--muted-strong);
  border: 1px solid var(--line);
  background: rgba(6, 21, 24, 0.72);
  font-size: 0.76rem;
  font-weight: 700;
}

.icon-button[aria-pressed="true"] {
  color: #ffc3be;
  border-color: rgba(255, 142, 134, 0.25);
  background: rgba(103, 32, 33, 0.3);
}

.conversation-card {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 2vw, 28px);
}

.conversation-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.conversation-heading h2 {
  font-size: clamp(2rem, 3vw, 3.1rem);
}

.transcript {
  position: relative;
  flex: 1 1 auto;
  overflow: auto;
  min-height: 330px;
  max-height: 520px;
  margin-top: 28px;
  padding: 14px;
  border: 1px dashed rgba(120, 215, 205, 0.15);
  border-radius: 18px;
  scrollbar-color: var(--aqua-dark) transparent;
}

.empty-transcript {
  position: absolute;
  inset: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  text-align: center;
}

.empty-transcript > span {
  color: var(--aqua);
  font-size: 2rem;
}

.empty-transcript h3 {
  margin: 16px 0 8px;
  color: var(--text);
  font-family: var(--display);
  font-size: 1.4rem;
  font-weight: 400;
}

.empty-transcript p {
  max-width: 360px;
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
}

.message {
  max-width: 88%;
  margin-bottom: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 14px 14px 14px 4px;
  color: var(--muted-strong);
  background: rgba(12, 39, 42, 0.7);
  font-size: 0.82rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.message > p {
  margin: 0;
}

.message > span {
  display: block;
  margin-bottom: 5px;
  color: var(--aqua);
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.message.user {
  margin-left: auto;
  border-color: rgba(103, 225, 212, 0.26);
  border-radius: 14px 14px 4px 14px;
  color: #d5fbf6;
  background: rgba(25, 78, 77, 0.6);
}

.message[data-interrupted="true"] {
  opacity: 0.62;
}

.message-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-top: 14px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(4, 17, 20, 0.72);
}

.message-form input {
  min-width: 0;
  border: 0;
  outline: 0;
  padding: 0 12px;
  color: var(--text);
  background: transparent;
  font-size: 0.82rem;
}

.message-form input::placeholder {
  color: #6f8585;
}

.message-form button {
  min-height: 42px;
  padding: 0 17px;
  border-radius: 10px;
  color: #041315;
  background: var(--aqua);
  font-size: 0.76rem;
  font-weight: 800;
}

.message-form button:disabled {
  opacity: 0.38;
}

.identity-note {
  margin-top: 16px;
  padding: 14px 15px;
  border-left: 2px solid var(--amber);
  border-radius: 0 12px 12px 0;
  background: rgba(150, 103, 38, 0.09);
}

.identity-note strong {
  color: #e6c388;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.identity-note p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.acronym-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.acronym-grid article {
  min-width: 0;
  padding: clamp(28px, 4vw, 52px) clamp(18px, 2.6vw, 38px);
  border-right: 1px solid var(--line);
  transition: background 180ms ease;
}

.acronym-grid article:last-child {
  border-right: 0;
}

.acronym-grid article:hover {
  background: rgba(103, 225, 212, 0.035);
}

.acronym-grid article > span {
  color: var(--aqua);
  font-family: var(--display);
  font-size: clamp(3.2rem, 5vw, 5.6rem);
  line-height: 1;
}

.acronym-grid h3,
.capability-grid h3,
.process-list h3,
.safety-card h3 {
  margin: 24px 0 10px;
  font-size: 1rem;
  font-weight: 650;
}

.acronym-grid p,
.capability-grid p,
.process-list p,
.safety-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.75;
}

.nexus-definition {
  display: grid;
  grid-template-columns: minmax(220px, 0.45fr) minmax(0, 1fr);
  gap: 70px;
  margin-top: 60px;
  padding-top: 42px;
}

.nexus-definition > p:last-child {
  max-width: 920px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.6rem, 3vw, 3rem);
  line-height: 1.25;
}

.nexus-definition strong {
  color: var(--aqua);
  font-weight: 400;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--line);
}

.capability-grid article {
  min-height: 250px;
  padding: clamp(25px, 3vw, 42px);
  background: rgba(5, 20, 23, 0.94);
  transition: background 180ms ease, transform 180ms ease;
}

.capability-grid article:hover {
  background: rgba(11, 39, 41, 0.97);
}

.capability-grid article > span {
  color: var(--amber);
  font-family: var(--mono);
  font-size: 0.67rem;
}

.capability-grid h3 {
  margin-top: 50px;
  font-family: var(--display);
  font-size: 1.45rem;
  font-weight: 400;
}

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

.process-list li {
  display: grid;
  grid-template-columns: minmax(110px, 0.25fr) minmax(0, 1fr);
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.process-list li > span {
  color: var(--aqua);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.process-list h3 {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: clamp(1.35rem, 2vw, 2rem);
  font-weight: 400;
}

.transparency-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  gap: clamp(50px, 8vw, 120px);
  align-items: center;
}

.transparency-copy > p:not(.kicker) {
  max-width: 800px;
  margin: 28px 0;
  color: var(--muted-strong);
  font-size: 1rem;
  line-height: 1.9;
}

.author-profile {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.author-profile h3 {
  margin: 12px 0 8px;
  font-family: var(--display);
  font-size: clamp(1.35rem, 2.4vw, 1.65rem);
  font-weight: 400;
}

.author-profile > p:not(.kicker) {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.8;
}

.author-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 18px;
}

.author-meta time {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
}

.safety-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  padding: clamp(28px, 4vw, 46px);
  border: 1px solid rgba(214, 162, 86, 0.2);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(92, 62, 24, 0.18), rgba(11, 30, 32, 0.72));
}

.safety-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid rgba(214, 162, 86, 0.35);
  border-radius: 50%;
  color: #efc889;
  font-size: 1.45rem;
}

.safety-card h3 {
  margin-top: 7px;
  color: #f3dcb5;
  font-family: var(--display);
  font-size: 1.45rem;
  font-weight: 400;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.faq-grid details {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(7, 25, 28, 0.65);
}

.faq-grid summary {
  position: relative;
  padding: 22px 58px 22px 24px;
  color: var(--text);
  font-size: 0.94rem;
  font-weight: 650;
  list-style: none;
}

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

.faq-grid summary::after {
  position: absolute;
  top: 50%;
  right: 24px;
  color: var(--aqua);
  content: "+";
  font-size: 1.4rem;
  font-weight: 300;
  transform: translateY(-50%);
}

.faq-grid details[open] summary::after {
  content: "−";
}

.faq-grid details p {
  margin: 0;
  padding: 0 24px 24px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.75;
}

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  padding: 52px 0 60px;
}

.footer-brand > div {
  display: grid;
  gap: 4px;
}

.footer-brand strong {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 400;
}

.footer-brand div span,
.footer-meta {
  color: var(--muted);
  font-size: 0.7rem;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px 24px;
}

.noscript {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 99;
  max-width: 420px;
  padding: 14px;
  border: 1px solid rgba(255, 142, 134, 0.3);
  border-radius: 12px;
  color: #ffd5d1;
  background: #35191b;
}

.is-hidden {
  display: none !important;
}

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

@keyframes breathe {
  0%, 100% { opacity: 0.55; transform: scale(0.92); }
  50% { opacity: 1; transform: scale(1.08); }
}

@media (max-width: 1180px) {
  .topbar {
    grid-template-columns: 1fr auto;
  }

  .desktop-nav {
    display: none;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(330px, 0.65fr);
  }

  .experience-grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(320px, 0.78fr);
  }

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

  .acronym-grid article:nth-child(3) {
    border-right: 0;
  }

  .acronym-grid article:nth-child(-n + 3) {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 900px) {
  .site-shell {
    width: min(100% - 28px, var(--max-width));
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-signal {
    width: min(76vw, 520px);
    justify-self: center;
  }

  .experience-grid,
  .transparency-section,
  .split-heading {
    grid-template-columns: 1fr;
  }

  .split-heading {
    align-items: start;
    gap: 22px;
  }

  .conversation-card {
    min-height: 600px;
  }

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

  .acronym-grid article,
  .acronym-grid article:nth-child(3) {
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .acronym-grid article:nth-child(even) {
    border-right: 0;
  }

  .acronym-grid article:last-child {
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

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

  .nexus-definition {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-meta {
    justify-content: flex-start;
  }
}

@media (max-width: 620px) {
  .site-shell {
    width: min(100% - 20px, var(--max-width));
  }

  .topbar {
    min-height: 92px;
  }

  .brand-mark {
    width: 44px;
    height: 44px;
    border-radius: 13px;
    font-size: 23px;
  }

  .brand-copy .eyebrow {
    display: none;
  }

  .brand-name {
    max-width: none;
    font-size: 0.96rem;
  }

  .brand-expansion {
    display: block;
    max-width: calc(100vw - 94px);
    font-size: 0.64rem;
    line-height: 1.3;
    white-space: normal;
  }

  .status-pill {
    padding: 7px 9px;
    font-size: 0.58rem;
  }

  .hero {
    gap: 54px;
    padding: 70px 0 82px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-link {
    width: 100%;
  }

  .hero-signal {
    width: 88vw;
    max-width: 420px;
  }

  .experience-section {
    padding: 12px 0 64px;
  }

  .experience-section .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 10px;
  }

  .experience-intro {
    width: 100%;
    max-width: none;
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .experience-intro p {
    max-width: 36ch;
    font-size: 0.72rem;
  }

  .experience-intro .neural-signature {
    display: none;
  }

  .meaning-section,
  .capabilities-section,
  .process-section,
  .transparency-section,
  .faq-section {
    padding: 82px 0;
  }

  .stage-card,
  .conversation-card {
    border-radius: 20px;
  }

  .stage-card {
    padding: 10px;
  }

  .stage-meta {
    padding-inline: 4px;
  }

  .video-stage {
    aspect-ratio: 1 / 1.12;
    border-radius: 16px;
  }

  .neural-backdrop {
    width: 100vw;
    opacity: 0.16;
  }

  .stage-status-bar {
    min-height: 38px;
    padding: 4px;
  }

  .stage-status-bar .status-pill {
    display: none;
  }

  .error-panel {
    flex-direction: column;
  }

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

  .primary-button,
  .danger-button {
    grid-column: 1 / -1;
  }

  .conversation-card {
    min-height: 570px;
    padding: 18px;
  }

  .transcript {
    min-height: 320px;
  }

  .message-form {
    grid-template-columns: 1fr;
  }

  .message-form input {
    min-height: 46px;
  }

  .message-form button {
    min-height: 46px;
  }

  .acronym-grid,
  .capability-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .acronym-grid article,
  .acronym-grid article:nth-child(3),
  .acronym-grid article:nth-child(even),
  .acronym-grid article:last-child {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .acronym-grid article:last-child {
    border-bottom: 0;
  }

  .capability-grid article {
    min-height: 210px;
  }

  .process-list li {
    grid-template-columns: 52px 1fr;
  }

  .transparency-section {
    gap: 38px;
  }

  .safety-card {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    align-items: flex-start;
  }
}

@media (max-width: 360px) {
  .site-shell {
    width: calc(100% - 16px);
  }

  .topbar {
    min-height: 88px;
  }

  .brand-lockup {
    gap: 10px;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    font-size: 21px;
  }

  .brand-name {
    font-size: 0.9rem;
  }

  .brand-expansion {
    max-width: calc(100vw - 76px);
    font-size: 0.61rem;
  }

  .experience-section {
    padding-top: 8px;
  }

  .experience-section .section-heading h2 {
    font-size: 1.32rem;
  }

  .stage-card {
    padding: 8px;
  }

  .video-stage {
    aspect-ratio: 1 / 1.08;
  }

  .consent-row {
    font-size: 0.82rem;
  }

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

  .primary-button,
  .danger-button,
  .icon-button {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) and (orientation: landscape) and (max-height: 600px) {
  .site-shell {
    width: min(100% - 20px, var(--max-width));
  }

  .topbar {
    min-height: 68px;
  }

  .brand-copy .eyebrow,
  .brand-expansion,
  .experience-intro,
  .experience-section .section-heading .kicker {
    display: none;
  }

  .experience-section {
    padding-top: 10px;
  }

  .experience-section .section-heading {
    margin-bottom: 8px;
  }

  .experience-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.85fr);
    align-items: start;
  }

  .stage-card,
  .conversation-card {
    padding: 10px;
    border-radius: 18px;
  }

  .video-stage {
    aspect-ratio: 16 / 9;
  }

  .stage-status-bar {
    min-height: 34px;
    margin-top: 4px;
  }

  .consent-row,
  .controls {
    margin-top: 8px;
  }

  .primary-button,
  .danger-button,
  .icon-button {
    min-height: 44px;
  }

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

  .conversation-heading h2 {
    font-size: 1.65rem;
  }

  .transcript {
    min-height: 220px;
    max-height: 270px;
    margin-top: 12px;
  }

  .identity-note {
    display: none;
  }
}

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

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