:root {
  --ink: #29231f;
  --muted: #756b63;
  --paper: #f0e7da;
  --paper-2: #f7f1e8;
  --line: rgba(62, 49, 40, 0.18);
  --accent: #e76548;
  --accent-soft: #f3b29d;
  --night: #182322;
  --night-2: #21312f;
  --white: #fbf7f0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  text-rendering: optimizeLegibility;
}

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

button {
  color: inherit;
  font: inherit;
}

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

img {
  display: block;
}

.shell {
  width: min(1340px, calc(100% - 88px));
  margin: 0 auto;
}

.section {
  padding: 128px 0;
}

.site-header {
  position: fixed;
  z-index: 60;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  height: 94px;
  align-items: center;
  justify-content: space-between;
  padding: 0 44px;
  color: var(--white);
  transition: background 240ms ease, height 240ms ease, backdrop-filter 240ms ease;
}

.site-header.is-scrolled {
  height: 74px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  background: rgba(24, 35, 34, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.brand-mark::before,
.brand-mark::after,
.brand-mark i {
  position: absolute;
  content: "";
  background: currentColor;
  transform-origin: center;
}

.brand-mark::before {
  width: 24px;
  height: 1px;
  transform: rotate(38deg);
}

.brand-mark::after {
  width: 24px;
  height: 1px;
  transform: rotate(-38deg);
}

.brand-mark i {
  width: 1px;
  height: 24px;
}

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

.brand strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.13em;
}

.brand small {
  margin-top: 2px;
  font-size: 8px;
  letter-spacing: 0.2em;
  opacity: 0.62;
  text-transform: uppercase;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 13px;
}

.site-header nav > a:not(.nav-cta) {
  position: relative;
  padding: 10px 0;
}

.site-header nav > a:not(.nav-cta)::after {
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  content: "";
  transition: width 180ms ease;
}

.site-header nav > a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 12px 18px;
  border: 1px solid rgba(255,255,255,0.46);
  border-radius: 999px;
  transition: border-color 180ms ease, background 180ms ease;
}

.nav-cta:hover {
  border-color: var(--accent);
  background: var(--accent);
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 820px;
  height: 100svh;
  overflow: hidden;
  color: var(--white);
  background:
    var(--night)
    url("gepard-hero.webp")
    53% 47% / cover
    no-repeat;
}

.hero-wash {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(11,23,23,0.88) 0%, rgba(11,23,23,0.52) 42%, rgba(11,23,23,0.06) 82%),
    linear-gradient(0deg, rgba(11,23,23,0.56) 0%, transparent 36%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.07) 1px, transparent 1px);
  background-size: 12.5vw 100%, 100% 25%;
  mask-image: linear-gradient(to right, black, transparent 74%);
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  padding-top: 60px;
}

.hero-copy {
  width: min(750px, 63vw);
}

.kicker {
  display: flex;
  align-items: center;
  gap: 13px;
  margin: 0 0 24px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.kicker::before {
  width: 26px;
  height: 1px;
  background: currentColor;
  content: "";
}

.kicker.light {
  color: var(--accent-soft);
}

.hero h1,
.section-heading h2,
.manifesto h2,
.payload h2,
.roadmap-title h2,
.future h2,
.contact h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -0.045em;
}

.hero h1 {
  max-width: 760px;
  font-size: clamp(74px, 8.2vw, 128px);
  line-height: 0.86;
}

.hero-lead {
  max-width: 580px;
  margin: 34px 0 0;
  color: rgba(255,255,255,0.76);
  font-size: 18px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding: 0 23px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

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

.button-accent {
  background: var(--accent);
  color: #fff;
}

.button-accent:hover {
  background: #d9583b;
}

.button-ghost {
  border-color: rgba(255,255,255,0.42);
  color: #fff;
}

.button-ghost:hover {
  border-color: #fff;
}

.hero-note {
  display: flex;
  width: 265px;
  align-items: flex-start;
  gap: 13px;
  margin-top: 290px;
  padding: 18px 0;
  border-top: 1px solid rgba(255,255,255,0.28);
  border-bottom: 1px solid rgba(255,255,255,0.28);
}

.status-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(231,101,72,0.16);
}

.hero-note b {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-note p {
  margin: 8px 0 0;
  color: rgba(255,255,255,0.62);
  font-size: 12px;
  line-height: 1.5;
}

.hero-stats {
  position: absolute;
  z-index: 3;
  right: 44px;
  bottom: 28px;
  left: 44px;
  display: grid;
  grid-template-columns: repeat(3, 170px) 1fr;
  gap: 40px;
  align-items: end;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,0.24);
}

.hero-stats strong,
.hero-stats span {
  display: block;
}

.hero-stats strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 23px;
  font-weight: 400;
}

.hero-stats span {
  margin-top: 5px;
  color: rgba(255,255,255,0.55);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-stats > p {
  margin: 0;
  color: rgba(255,255,255,0.45);
  font-size: 10px;
  text-align: right;
}

.manifesto {
  position: relative;
  overflow: hidden;
}

.manifesto::after {
  position: absolute;
  top: -420px;
  right: -240px;
  width: 760px;
  height: 760px;
  border: 1px solid rgba(55,42,34,0.13);
  border-radius: 50%;
  content: "";
}

.manifesto-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 110px;
}

.manifesto h2,
.section-heading h2,
.payload h2,
.roadmap-title h2,
.contact h2 {
  font-size: clamp(48px, 5vw, 74px);
  line-height: 0.98;
}

.manifesto-copy {
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.manifesto-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.55;
}

.manifesto-copy p + p {
  margin-top: 22px;
}

.dark-section {
  color: var(--white);
  background:
    radial-gradient(circle at 90% 0%, rgba(83,126,116,0.2), transparent 34%),
    var(--night);
}

.section-heading {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 80px;
  align-items: end;
  margin-bottom: 66px;
}

.section-heading > p {
  max-width: 470px;
  margin: 0 0 4px auto;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.light-heading > p {
  color: rgba(255,255,255,0.58);
}

.system-flow {
  display: grid;
  grid-template-columns: 1fr 58px 1fr 58px 1fr;
  align-items: stretch;
}

.system-flow article {
  position: relative;
  min-height: 360px;
  padding: 38px;
  border: 1px solid rgba(255,255,255,0.17);
  border-radius: 3px;
  background: rgba(255,255,255,0.035);
  transition: background 200ms ease, transform 200ms ease;
}

.system-flow article:hover {
  background: rgba(255,255,255,0.065);
  transform: translateY(-5px);
}

.system-number {
  position: absolute;
  top: 34px;
  right: 34px;
  color: rgba(255,255,255,0.27);
  font-size: 12px;
}

.card-tag {
  margin: 0;
  color: var(--accent);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.system-flow h3 {
  max-width: 300px;
  margin: 72px 0 26px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 30px;
  font-weight: 400;
  line-height: 1.05;
}

.system-flow ul,
.contact-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.system-flow li {
  padding: 9px 0;
  border-top: 1px solid rgba(255,255,255,0.11);
  color: rgba(255,255,255,0.57);
  font-size: 13px;
}

.flow-arrow {
  display: grid;
  place-items: center;
  color: var(--accent);
  font-size: 24px;
}

.cycle-line {
  display: flex;
  max-width: 820px;
  align-items: center;
  gap: 13px;
  margin: 64px auto 0;
  color: rgba(255,255,255,0.46);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.cycle-line i {
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, var(--accent), rgba(255,255,255,0.14));
}

.platforms {
  background: var(--paper-2);
}

.platform-tabs {
  display: flex;
  width: 100%;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.platform-tabs button {
  position: relative;
  flex: 1;
  padding: 21px 12px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.platform-tabs button:last-child {
  border-right: 0;
}

.platform-tabs button::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 3px;
  background: transparent;
  content: "";
}

.platform-tabs button.is-active {
  color: var(--ink);
}

.platform-tabs button.is-active::after {
  background: var(--accent);
}

.platform-stage {
  display: grid;
  min-height: 590px;
  grid-template-columns: 1.12fr 0.88fr;
  margin-top: 26px;
  background: #e3d8c9;
}

.platform-image {
  position: relative;
  min-height: 590px;
  overflow: hidden;
}

.platform-image img {
  object-fit: cover;
  animation: imageReveal 500ms ease both;
}

@keyframes imageReveal {
  from { opacity: 0.2; transform: scale(1.025); }
  to { opacity: 1; transform: scale(1); }
}

.image-source {
  position: absolute;
  bottom: 18px;
  left: 18px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(24,35,34,0.74);
  color: rgba(255,255,255,0.72);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

.platform-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 68px;
  background: var(--paper);
}

.platform-info h3 {
  margin: 18px 0 26px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(42px, 4vw, 63px);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.platform-text {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
  padding-top: 25px;
  border-top: 1px solid var(--line);
}

.fact-grid strong,
.fact-grid span {
  display: block;
}

.fact-grid strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 21px;
  font-weight: 400;
}

.fact-grid span {
  margin-top: 7px;
  color: var(--muted);
  font-size: 9px;
  line-height: 1.35;
  text-transform: uppercase;
}

.platform-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.platform-status span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

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

.scheme-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 38px;
}

.scheme-head h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(45px, 4.8vw, 70px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.04em;
}

.text-button {
  padding: 12px 0;
  border: 0;
  border-bottom: 1px solid var(--ink);
  background: transparent;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
}

.text-button span {
  margin-left: 32px;
  color: var(--accent);
}

.scheme-visual {
  width: 100%;
  padding: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-2);
  cursor: zoom-in;
}

.scheme-visual img {
  width: 100%;
  height: auto;
  transition: transform 350ms ease;
}

.scheme-visual:hover img {
  transform: scale(1.01);
}

.scheme-caption {
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255,255,255,0.15);
  border-left: 1px solid rgba(255,255,255,0.15);
}

.application-grid article {
  min-height: 255px;
  padding: 30px;
  border-right: 1px solid rgba(255,255,255,0.15);
  border-bottom: 1px solid rgba(255,255,255,0.15);
  transition: background 180ms ease;
}

.application-grid article:hover {
  background: rgba(255,255,255,0.045);
}

.application-grid span {
  color: var(--accent);
  font-size: 10px;
}

.application-grid h3 {
  max-width: 260px;
  margin: 72px 0 16px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 27px;
  font-weight: 400;
  line-height: 1.07;
}

.application-grid p {
  max-width: 310px;
  margin: 0;
  color: rgba(255,255,255,0.5);
  font-size: 13px;
  line-height: 1.55;
}

.payload {
  background: var(--paper-2);
}

.payload-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 100px;
}

.payload-intro {
  position: sticky;
  top: 120px;
  align-self: start;
}

.payload-intro > p:last-child {
  max-width: 440px;
  margin: 32px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.payload-list {
  border-top: 1px solid var(--line);
}

.payload-list article {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.payload-list article > span {
  color: var(--accent);
  font-size: 10px;
}

.payload-list h3 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 25px;
  font-weight: 400;
}

.payload-list p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

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

.status-legend {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.status-legend article {
  position: relative;
  min-height: 270px;
  padding: 36px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.22);
}

.status-legend article > span {
  display: block;
  width: 36px;
  height: 4px;
  margin-bottom: 44px;
  background: var(--ink);
}

.status-legend .preliminary > span {
  background: var(--accent);
}

.status-legend .pending > span {
  border-top: 2px dashed var(--accent);
  background: transparent;
}

.status-legend h3 {
  margin: 14px 0 16px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 28px;
  font-weight: 400;
}

.status-legend article > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.roadmap {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 100px;
  margin-top: 140px;
  padding-top: 74px;
  border-top: 1px solid var(--line);
}

.roadmap-steps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.roadmap-steps article {
  min-height: 190px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.roadmap-steps span {
  color: var(--accent);
  font-size: 10px;
}

.roadmap-steps h3 {
  margin: 35px 0 10px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
  font-weight: 400;
}

.roadmap-steps p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.future {
  padding-top: 0;
  background: var(--paper);
}

.future-card {
  display: grid;
  min-height: 530px;
  grid-template-columns: 1fr 0.72fr;
  gap: 110px;
  align-items: end;
  padding: 70px;
  color: var(--white);
  background: linear-gradient(105deg, #166fa8, #47a6d9);
}

.future h2 {
  font-size: clamp(50px, 5.3vw, 78px);
  line-height: 0.95;
}

.future-card > div:last-child > p {
  margin: 0;
  color: rgba(255,255,255,0.62);
  font-size: 15px;
  line-height: 1.65;
}

.future-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 35px;
}

.future-tags span {
  padding: 10px 13px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 999px;
  color: rgba(255,255,255,0.72);
  font-size: 10px;
}

.contact {
  background: var(--paper-2);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 0.78fr;
  gap: 110px;
  align-items: start;
}

.contact-grid > div:first-child > p:last-child {
  max-width: 600px;
  margin: 34px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.contact-card {
  padding: 44px;
  color: var(--white);
  background: var(--night);
}

.contact-index {
  color: rgba(255,255,255,0.35);
  font-size: 10px;
}

.contact-card h3 {
  margin: 64px 0 25px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 33px;
  font-weight: 400;
  line-height: 1.05;
}

.contact-card li {
  padding: 11px 0;
  border-top: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.58);
  font-size: 13px;
}

.contact-card .button {
  width: 100%;
  margin-top: 40px;
}

footer {
  padding: 34px 0;
  color: rgba(255,255,255,0.75);
  background: #0f1817;
}

.footer-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr auto;
  gap: 50px;
  align-items: center;
}

.footer-grid > p {
  margin: 0;
  color: rgba(255,255,255,0.38);
  font-size: 10px;
  line-height: 1.5;
}

.footer-grid > p:last-child {
  text-align: right;
}

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

.scheme-modal {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 74px 30px 30px;
  background: rgba(11,18,18,0.96);
  backdrop-filter: blur(12px);
}

.modal-scroll {
  width: 100%;
  max-height: 100%;
  overflow: auto;
}

.modal-scroll img {
  width: max(100%, 1500px);
  height: auto;
  background: var(--paper);
}

.modal-close {
  position: absolute;
  top: 22px;
  right: 30px;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.modal-close span {
  position: absolute;
  top: 18px;
  left: 9px;
  width: 18px;
  height: 1px;
  background: #fff;
}

.modal-close span:first-child {
  transform: rotate(45deg);
}

.modal-close span:last-child {
  transform: rotate(-45deg);
}

@media (max-width: 1050px) {
  .shell {
    width: min(100% - 52px, 920px);
  }

  .site-header {
    padding: 0 26px;
  }

  .menu-toggle {
    position: relative;
    z-index: 2;
    display: block;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(255,255,255,0.32);
    border-radius: 50%;
    background: transparent;
  }

  .menu-toggle span {
    position: absolute;
    left: 11px;
    width: 18px;
    height: 1px;
    background: #fff;
    transition: transform 180ms ease, top 180ms ease;
  }

  .menu-toggle span:first-child {
    top: 16px;
  }

  .menu-toggle span:last-child {
    top: 23px;
  }

  .menu-toggle.is-open span:first-child {
    top: 20px;
    transform: rotate(45deg);
  }

  .menu-toggle.is-open span:last-child {
    top: 20px;
    transform: rotate(-45deg);
  }

  .site-header nav {
    position: fixed;
    inset: 0;
    display: flex;
    visibility: hidden;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 22px;
    padding: 90px 44px;
    opacity: 0;
    background: rgba(24,35,34,0.98);
    transition: opacity 180ms ease, visibility 180ms ease;
  }

  .site-header nav.is-open {
    visibility: visible;
    opacity: 1;
  }

  .site-header nav a {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 34px;
  }

  .site-header nav .nav-cta {
    margin-top: 18px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 13px;
  }

  .hero-content {
    align-items: flex-start;
    padding-top: 205px;
  }

  .hero-copy {
    width: 82%;
  }

  .hero-note {
    display: none;
  }

  .hero-stats {
    right: 26px;
    left: 26px;
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-stats > p {
    display: none;
  }

  .manifesto-grid,
  .payload-grid,
  .roadmap,
  .future-card,
  .contact-grid {
    gap: 60px;
  }

  .section-heading {
    gap: 50px;
  }

  .system-flow {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .system-flow article {
    min-height: auto;
  }

  .flow-arrow {
    display: none;
  }

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

  .platform-image {
    min-height: 480px;
  }

  .platform-info {
    padding: 55px;
  }
}

@media (max-width: 720px) {
  .shell {
    width: calc(100% - 34px);
  }

  .section {
    padding: 88px 0;
  }

  .site-header {
    height: 76px;
    padding: 0 17px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .brand strong {
    font-size: 17px;
  }

  .hero {
    min-height: 780px;
    height: 100svh;
  }

  .hero-wash {
    background:
      linear-gradient(90deg, rgba(11,23,23,0.88), rgba(11,23,23,0.38)),
      linear-gradient(0deg, rgba(11,23,23,0.82), transparent 55%);
  }

  .hero-content {
    padding-top: 150px;
  }

  .hero-copy {
    width: 100%;
  }

  .hero h1 {
    font-size: clamp(55px, 17vw, 76px);
  }

  .hero-lead {
    max-width: 94%;
    margin-top: 27px;
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    width: min(100%, 330px);
    margin-top: 29px;
  }

  .button {
    width: 100%;
  }

  .hero-stats {
    right: 17px;
    bottom: 17px;
    left: 17px;
    gap: 10px;
    padding-top: 15px;
  }

  .hero-stats strong {
    font-size: 16px;
  }

  .hero-stats span {
    font-size: 7px;
    line-height: 1.3;
  }

  .manifesto-grid,
  .section-heading,
  .payload-grid,
  .roadmap,
  .future-card,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .manifesto-grid,
  .section-heading,
  .payload-grid,
  .roadmap,
  .future-card,
  .contact-grid {
    gap: 38px;
  }

  .manifesto h2,
  .section-heading h2,
  .payload h2,
  .roadmap-title h2,
  .contact h2 {
    font-size: 45px;
  }

  .manifesto-copy {
    padding-top: 24px;
  }

  .manifesto-copy p {
    font-size: 16px;
  }

  .section-heading {
    margin-bottom: 42px;
  }

  .section-heading > p {
    margin-left: 0;
  }

  .system-flow article {
    padding: 28px;
  }

  .system-flow h3 {
    margin-top: 52px;
  }

  .cycle-line {
    flex-wrap: wrap;
    justify-content: center;
    gap: 9px;
  }

  .cycle-line i {
    min-width: 18px;
  }

  .platform-tabs {
    overflow-x: auto;
  }

  .platform-tabs button {
    min-width: 150px;
  }

  .platform-stage {
    min-height: 0;
  }

  .platform-image {
    min-height: 310px;
  }

  .platform-info {
    padding: 35px 25px;
  }

  .platform-info h3 {
    font-size: 43px;
  }

  .fact-grid {
    gap: 10px;
  }

  .fact-grid strong {
    font-size: 16px;
  }

  .scheme-head {
    display: block;
  }

  .scheme-head h2 {
    font-size: 44px;
  }

  .text-button {
    margin-top: 24px;
  }

  .scheme-visual {
    padding: 7px;
    overflow-x: auto;
  }

  .scheme-visual img {
    width: 1000px;
    max-width: none;
  }

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

  .application-grid article {
    min-height: 215px;
  }

  .application-grid h3 {
    margin-top: 50px;
  }

  .payload-intro {
    position: static;
  }

  .status-legend,
  .roadmap-steps {
    grid-template-columns: 1fr;
  }

  .roadmap {
    margin-top: 95px;
    padding-top: 55px;
  }

  .future {
    padding: 0;
  }

  .future-card {
    width: 100%;
    min-height: 620px;
    padding: 52px 22px;
  }

  .future h2 {
    font-size: 49px;
  }

  .contact-card {
    padding: 32px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .footer-grid > p:last-child {
    text-align: left;
  }

  .scheme-modal {
    padding: 67px 10px 10px;
  }
}

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

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

/* Airborne light theme */
:root {
  --ink: #12324a;
  --muted: #5f7b8f;
  --paper: #eef8ff;
  --paper-2: #ffffff;
  --line: rgba(47, 128, 180, 0.18);
  --accent: #238fce;
  --accent-soft: #bfe8ff;
  --night: #dff3ff;
  --night-2: #c9ebfb;
  --white: #ffffff;
}

body {
  background:
    radial-gradient(circle at 12% 8%, rgba(255,255,255,0.96), transparent 28%),
    linear-gradient(180deg, #dff3ff 0%, #f8fcff 32%, #ffffff 100%);
}

.site-header {
  color: #fff;
  text-shadow: 0 1px 18px rgba(19, 78, 119, 0.18);
}

.site-header.is-scrolled {
  border-bottom-color: rgba(41, 126, 177, 0.14);
  background: rgba(241, 250, 255, 0.88);
  color: var(--ink);
  text-shadow: none;
  box-shadow: 0 10px 35px rgba(38, 110, 151, 0.08);
}

.site-header.is-scrolled .nav-cta {
  border-color: rgba(35, 143, 206, 0.36);
}

.nav-cta:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.hero {
  color: #fff;
  background-color: #74bceb;
  background-position: 53% 47%;
}

.hero-wash {
  background:
    linear-gradient(90deg, rgba(21, 105, 163, 0.67) 0%, rgba(38, 133, 193, 0.31) 40%, rgba(107, 186, 235, 0.02) 72%),
    linear-gradient(0deg, rgba(28, 112, 168, 0.42) 0%, transparent 36%);
}

.hero-grid {
  opacity: 0.7;
  background-image:
    linear-gradient(rgba(255,255,255,0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.16) 1px, transparent 1px);
}

.kicker,
.card-tag,
.platform-status,
.roadmap-steps span,
.payload-list article > span,
.application-grid span,
.text-button span {
  color: var(--accent);
}

.kicker.light {
  color: #eaf8ff;
}

.button-accent {
  background: #fff;
  color: #167fbd;
  box-shadow: 0 14px 38px rgba(27, 107, 157, 0.18);
}

.button-accent:hover {
  background: #eef9ff;
}

.button-ghost {
  border-color: rgba(255,255,255,0.66);
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
}

.status-dot {
  background: #fff;
  box-shadow: 0 0 0 5px rgba(255,255,255,0.2);
}

.manifesto,
.scheme,
.status {
  background:
    radial-gradient(circle at 88% 10%, rgba(167, 221, 250, 0.28), transparent 26%),
    #f7fcff;
}

.manifesto::after {
  border-color: rgba(64, 153, 207, 0.18);
}

.platforms,
.payload,
.contact {
  background:
    linear-gradient(180deg, #ffffff 0%, #edf8fe 100%);
}

.dark-section {
  color: var(--ink);
  background:
    radial-gradient(circle at 92% 0%, rgba(255,255,255,0.94), transparent 34%),
    radial-gradient(circle at 10% 100%, rgba(255,255,255,0.75), transparent 30%),
    linear-gradient(135deg, #caebfb 0%, #eaf8ff 52%, #cfeefa 100%);
}

.light-heading > p,
.system-flow li,
.application-grid p {
  color: var(--muted);
}

.system-flow article {
  border-color: rgba(43, 132, 185, 0.2);
  background: rgba(255,255,255,0.5);
  box-shadow: 0 20px 60px rgba(35, 115, 161, 0.07);
  backdrop-filter: blur(14px);
}

.system-flow article:hover,
.application-grid article:hover {
  background: rgba(255,255,255,0.78);
}

.system-number {
  color: rgba(28, 111, 160, 0.36);
}

.system-flow li,
.application-grid,
.application-grid article {
  border-color: rgba(43, 132, 185, 0.18);
}

.cycle-line {
  color: rgba(18, 77, 112, 0.55);
}

.cycle-line i {
  background: linear-gradient(90deg, var(--accent), rgba(57, 147, 197, 0.16));
}

.platform-stage {
  overflow: hidden;
  border: 1px solid rgba(44, 139, 192, 0.14);
  border-radius: 4px;
  background: #dff2fc;
  box-shadow: 0 28px 90px rgba(35, 112, 155, 0.11);
}

.platform-info {
  background: rgba(255,255,255,0.94);
}

.image-source {
  background: rgba(26, 112, 166, 0.74);
}

.scheme-visual {
  border-color: rgba(42, 133, 187, 0.18);
  background: #fff;
  box-shadow: 0 24px 70px rgba(33, 112, 159, 0.08);
}

.status-legend article {
  border-color: rgba(44, 137, 190, 0.18);
  background: rgba(255,255,255,0.7);
  box-shadow: 0 18px 55px rgba(34, 111, 155, 0.06);
}

.status-legend article > span {
  background: #72b9df;
}

.future-card {
  color: #fff;
  background: linear-gradient(105deg, #166fa8, #47a6d9);
  box-shadow: 0 32px 100px rgba(31, 108, 153, 0.16);
}

.contact-card {
  color: var(--ink);
  background:
    radial-gradient(circle at 95% 5%, #fff 0%, transparent 33%),
    linear-gradient(145deg, #c9ecfc, #eefaff);
  box-shadow: 0 26px 80px rgba(34, 112, 157, 0.11);
}

.contact-index,
.contact-card li {
  color: var(--muted);
}

.contact-card li {
  border-top-color: rgba(42, 132, 184, 0.16);
}

.contact-card .button-accent {
  background: var(--accent);
  color: #fff;
}

footer {
  color: rgba(255,255,255,0.86);
  background: #166a9f;
}

.scheme-modal {
  background: rgba(19, 74, 108, 0.9);
}

@media (max-width: 1050px) {
  .menu-toggle {
    border-color: rgba(255,255,255,0.6);
  }

  .site-header.is-scrolled .menu-toggle {
    border-color: rgba(30, 113, 163, 0.35);
  }

  .site-header.is-scrolled .menu-toggle span {
    background: var(--ink);
  }

  .site-header nav {
    background:
      radial-gradient(circle at 82% 10%, rgba(255,255,255,0.86), transparent 34%),
      rgba(214, 241, 254, 0.98);
    color: var(--ink);
    text-shadow: none;
  }

  .site-header nav .nav-cta {
    border-color: rgba(35, 143, 206, 0.45);
  }
}

@media (max-width: 720px) {
  .site-header.is-scrolled {
    height: 68px;
  }

  .site-header nav {
    gap: 18px;
    padding: 86px 24px 38px;
  }

  .site-header nav a {
    font-size: clamp(27px, 8.5vw, 34px);
  }

  .hero-wash {
    background:
      linear-gradient(90deg, rgba(18, 100, 157, 0.72), rgba(43, 141, 199, 0.22)),
      linear-gradient(0deg, rgba(19, 102, 159, 0.62), transparent 58%);
  }

  .hero {
    min-height: 820px;
    background-position: 58% 50%;
  }

  .hero-content {
    padding-top: 128px;
    padding-bottom: 155px;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(42px, 13.5vw, 60px);
    line-height: 0.9;
  }

  .hero-lead {
    max-width: 100%;
  }

  .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .hero-stats > div {
    min-width: 0;
  }

  .hero-stats strong {
    font-size: clamp(13px, 3.8vw, 16px);
    white-space: nowrap;
  }

  .hero-stats span {
    font-size: 7px;
    letter-spacing: 0.035em;
  }

  .platform-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: visible;
    border-bottom: 0;
  }

  .platform-tabs button {
    min-width: 0;
    min-height: 52px;
    padding: 14px 8px;
    border-bottom: 1px solid var(--line);
    font-size: 9px;
    line-height: 1.25;
  }

  .platform-tabs button:nth-child(2) {
    border-right: 0;
  }

  .platform-stage {
    margin-top: 18px;
  }

  .platform-image {
    min-height: clamp(240px, 72vw, 310px);
  }

  .platform-info h3 {
    font-size: clamp(35px, 11vw, 43px);
  }

  .fact-grid {
    grid-template-columns: 1fr;
    margin-top: 34px;
  }

  .fact-grid div {
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line);
  }

  .scheme-visual {
    overflow: hidden;
  }

  .scheme-visual img {
    width: 100%;
    max-width: 100%;
  }

  .scheme-caption {
    font-size: 10px;
    line-height: 1.45;
  }

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

  .future h2 {
    font-size: clamp(40px, 12vw, 49px);
  }

  .modal-scroll img {
    width: max(100%, 900px);
  }
}

@media (max-width: 420px) {
  .brand small {
    display: none;
  }

  .section {
    padding: 74px 0;
  }

  .kicker {
    gap: 9px;
    margin-bottom: 18px;
    font-size: 9px;
    line-height: 1.35;
  }

  .hero-actions {
    width: 100%;
  }

  .button {
    min-height: 50px;
    padding: 0 18px;
  }

  .manifesto h2,
  .section-heading h2,
  .payload h2,
  .roadmap-title h2,
  .contact h2,
  .scheme-head h2 {
    font-size: 39px;
  }

  .system-flow article,
  .application-grid article,
  .status-legend article {
    padding: 24px;
  }

  .platform-info,
  .contact-card {
    padding: 30px 22px;
  }

  .future-card {
    padding: 46px 20px;
  }

  .payload-list article {
    grid-template-columns: 38px 1fr;
    gap: 12px;
  }

  .footer-grid {
    gap: 18px;
  }
}

/* Revision: complete product framing and responsive blue scheme */
.hero {
  background-image: url("hero-desktop.webp");
  background-position: center;
  background-size: cover;
}

.future-card {
  background:
    radial-gradient(circle at 82% 16%, rgba(255,255,255,0.34), transparent 26%),
    linear-gradient(115deg, #166fa8 0%, #47a6d9 58%, #96d2ef 100%);
}

.platform-stage {
  min-height: 0;
}

.platform-image {
  min-height: 0;
  aspect-ratio: 4 / 3;
  background: #cfeaf9;
}

.platform-image img {
  object-fit: cover;
  object-position: center;
}

.scheme-visual picture,
.scheme-modal picture {
  display: block;
  width: 100%;
}

.scheme-visual picture img,
.scheme-modal picture img {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 720px) {
  .hero {
    background-image: url("hero-mobile.webp");
    background-position: center;
    background-size: cover;
  }

  .hero-actions {
    margin-top: 58px;
  }

  .platform-image {
    min-height: 0;
    aspect-ratio: 4 / 3;
  }

  .modal-scroll picture,
  .modal-scroll img {
    width: 100%;
    max-width: 100%;
  }
}