:root {
  --bg: #07111c;
  --bg-deep: #040a11;
  --surface: #0d1a28;
  --surface-soft: #101f2f;
  --surface-high: #142638;
  --line: rgba(157, 188, 211, 0.15);
  --line-strong: rgba(157, 188, 211, 0.27);
  --text: #f3f8fb;
  --muted: #9caebe;
  --cyan: #2bd6e8;
  --cyan-bright: #72edf6;
  --cyan-dim: rgba(43, 214, 232, 0.13);
  --green: #4de09b;
  --amber: #ffbb4d;
  --radius: 18px;
  --shell: min(1180px, calc(100% - 40px));
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI Variable", "Segoe UI", Inter, system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.16;
  z-index: 20;
  background-image:
    repeating-linear-gradient(112deg, transparent 0 7px, rgba(255, 255, 255, 0.008) 8px 9px),
    repeating-linear-gradient(22deg, transparent 0 11px, rgba(43, 214, 232, 0.007) 12px 13px);
}

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

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

button,
input {
  font: inherit;
}

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  transform: translateY(-150%);
  padding: 10px 16px;
  border-radius: 8px;
  color: #001216;
  background: var(--cyan-bright);
  z-index: 100;
  font-weight: 700;
}

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

:focus-visible {
  outline: 3px solid var(--cyan-bright);
  outline-offset: 4px;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background-color 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(6, 15, 25, 0.86);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
}

.brand img {
  object-fit: contain;
  filter: drop-shadow(0 0 18px rgba(43, 214, 232, 0.25));
}

.brand-copy {
  display: grid;
  line-height: 1.1;
}

.brand-copy strong {
  font-size: 18px;
  letter-spacing: -0.02em;
}

.brand-copy span {
  margin-top: 5px;
  color: #75899b;
  font: 600 9px/1 "Cascadia Mono", Consolas, monospace;
  letter-spacing: 0.14em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: #b7c5d0;
  font-size: 14px;
  font-weight: 600;
}

.site-nav > a:not(.nav-github) {
  position: relative;
}

.site-nav > a:not(.nav-github)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -7px;
  height: 1px;
  background: var(--cyan);
  transition: right 160ms ease;
}

.site-nav > a:hover::after {
  right: 0;
}

.nav-github {
  padding: 10px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.025);
}

.nav-github:hover {
  border-color: rgba(43, 214, 232, 0.55);
  background: var(--cyan-dim);
}

.nav-toggle {
  display: none;
  width: 43px;
  height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: var(--surface);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle > span:not(.sr-only) {
  width: 18px;
  height: 1px;
  background: var(--text);
}

.hero {
  min-height: 850px;
  position: relative;
  display: grid;
  align-items: center;
  padding: 150px 0 100px;
  overflow: hidden;
  background:
    radial-gradient(circle at 77% 38%, rgba(26, 168, 188, 0.14), transparent 33%),
    radial-gradient(circle at 15% 10%, rgba(31, 107, 145, 0.12), transparent 26%),
    linear-gradient(180deg, #081522 0%, var(--bg) 70%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  background-image:
    linear-gradient(rgba(105, 158, 184, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(105, 158, 184, 0.12) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, black 0, transparent 72%);
}

.hero-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--bg) 0%, transparent 22%, transparent 76%, var(--bg) 100%);
}

.radar {
  position: absolute;
  border: 1px solid rgba(43, 214, 232, 0.09);
  border-radius: 50%;
  pointer-events: none;
}

.radar::before,
.radar::after {
  content: "";
  position: absolute;
  inset: 24%;
  border: inherit;
  border-radius: inherit;
}

.radar::after {
  inset: 47%;
}

.radar-one {
  width: 680px;
  height: 680px;
  right: -220px;
  top: 62px;
}

.radar-two {
  width: 320px;
  height: 320px;
  left: -170px;
  bottom: -120px;
}

.hero-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.91fr) minmax(530px, 1.09fr);
  align-items: center;
  gap: 78px;
}

.eyebrow {
  color: var(--cyan-bright);
  font: 700 11px/1.2 "Cascadia Mono", Consolas, monospace;
  letter-spacing: 0.13em;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 14px var(--green);
}

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

h1 {
  max-width: 690px;
  margin: 25px 0 25px;
  font-size: clamp(49px, 5.2vw, 74px);
  line-height: 0.99;
  letter-spacing: -0.055em;
  font-weight: 720;
}

h1 span {
  color: var(--cyan-bright);
}

.hero-lead {
  max-width: 590px;
  margin-bottom: 34px;
  color: #acbdca;
  font-size: 18px;
  line-height: 1.7;
}

.hero-actions,
.hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.hero-actions {
  gap: 12px;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

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

.button-primary {
  color: #00181d;
  background: var(--cyan-bright);
  box-shadow: 0 8px 30px rgba(43, 214, 232, 0.18);
}

.button-primary:hover {
  background: #a0f6fa;
}

.button-secondary {
  border-color: var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.025);
}

.button-secondary:hover {
  border-color: rgba(43, 214, 232, 0.48);
  background: var(--cyan-dim);
}

.button-arrow {
  font-size: 18px;
}

.hero-meta {
  gap: 0;
  margin-top: 25px;
  color: #728799;
  font: 600 11px/1.3 "Cascadia Mono", Consolas, monospace;
  text-transform: uppercase;
}

.hero-meta span:not(:last-child)::after {
  content: "·";
  margin-inline: 10px;
  color: #385064;
}

.console-wrap {
  position: relative;
  transform: perspective(1200px) rotateY(-1.5deg) rotateX(0.5deg);
}

.console-glow {
  position: absolute;
  inset: 20% 5% -8%;
  border-radius: 40%;
  background: rgba(19, 197, 219, 0.18);
  filter: blur(90px);
}

.atc-console {
  position: relative;
  border: 1px solid rgba(133, 181, 205, 0.2);
  border-radius: 19px;
  padding: 18px;
  background: linear-gradient(145deg, rgba(17, 34, 50, 0.98), rgba(8, 20, 31, 0.98));
  box-shadow: var(--shadow), inset 0 1px rgba(255, 255, 255, 0.03);
  overflow: hidden;
}

.atc-console::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg, transparent 20%, rgba(255, 255, 255, 0.025), transparent 48%);
}

.console-header,
.flight-strip,
.ptt-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.console-header {
  padding: 3px 4px 15px;
}

.console-header > div:first-child {
  display: grid;
}

.console-header strong {
  font-size: 15px;
}

.console-kicker,
.flight-strip span,
.exchange-row span {
  color: #6f8799;
  font: 700 9px/1.2 "Cascadia Mono", Consolas, monospace;
  letter-spacing: 0.08em;
}

.console-live {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 9px;
  border: 1px solid rgba(77, 224, 155, 0.25);
  border-radius: 7px;
  color: var(--green);
  font: 700 9px/1 "Cascadia Mono", Consolas, monospace;
}

.console-live span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
}

.flight-strip {
  align-items: stretch;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
}

.flight-strip > div {
  display: grid;
}

.flight-strip > div:first-child {
  min-width: 38%;
}

.flight-strip > div:not(:first-child) {
  padding-left: 19px;
  border-left: 1px solid var(--line);
}

.flight-strip strong {
  margin: 3px 0 0;
  font-size: 18px;
  line-height: 1.2;
}

.flight-strip > div:first-child strong {
  color: var(--cyan-bright);
  font: 700 31px/1.05 "Cascadia Mono", Consolas, monospace;
  letter-spacing: -0.05em;
}

.flight-strip small {
  color: #7890a2;
  font-size: 10px;
}

.next-call {
  margin-top: 12px;
  padding: 16px;
  border: 1px solid rgba(43, 214, 232, 0.38);
  border-radius: 12px;
  background: linear-gradient(100deg, rgba(43, 214, 232, 0.13), rgba(43, 214, 232, 0.04));
}

.next-call .console-kicker {
  color: var(--cyan-bright);
}

.next-call strong {
  display: block;
  margin: 4px 0 7px;
  font-size: 17px;
}

.next-call p {
  margin: 0;
  color: #a8bac7;
  font-size: 12px;
}

.exchange {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.exchange-row {
  padding: 11px 13px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.025);
  border-left: 2px solid #668296;
}

.controller-row {
  border-left-color: var(--cyan);
}

.exchange-row p {
  margin: 4px 0 0;
  color: #c1ced7;
  font-size: 11px;
  line-height: 1.45;
}

.ptt-row {
  margin-top: 14px;
  gap: 13px;
}

.ptt-button {
  flex: 1;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(43, 214, 232, 0.3);
  border-radius: 9px;
  color: var(--cyan-bright);
  background: rgba(43, 214, 232, 0.08);
  font: 700 11px/1 "Cascadia Mono", Consolas, monospace;
  letter-spacing: 0.08em;
}

.ptt-row > div {
  display: flex;
  align-items: end;
  gap: 3px;
  height: 24px;
}

.level-bar {
  width: 4px;
  border-radius: 2px;
  background: var(--cyan);
}

.level-bar:nth-child(1) { height: 35%; opacity: 0.5; }
.level-bar:nth-child(2) { height: 70%; opacity: 0.7; }
.level-bar:nth-child(3) { height: 100%; }
.level-bar:nth-child(4) { height: 50%; opacity: 0.65; }

.console-note {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 13px;
  color: #647b8d;
  font: 600 9px/1.3 "Cascadia Mono", Consolas, monospace;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.console-note span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
}

.proof-bar {
  border-block: 1px solid var(--line);
  background: #08131f;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.proof-grid > div {
  display: grid;
  justify-items: center;
  padding: 27px 15px;
}

.proof-grid > div:not(:last-child) {
  border-right: 1px solid var(--line);
}

.proof-grid strong {
  color: var(--cyan-bright);
  font: 700 20px/1.1 "Cascadia Mono", Consolas, monospace;
}

.proof-grid span {
  margin-top: 4px;
  color: #7f94a4;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section {
  padding: 120px 0;
}

.section-heading {
  max-width: 730px;
  margin-bottom: 55px;
}

.section-heading h2,
.architecture-copy h2,
.privacy-copy h2,
.contribute h2,
.final-cta h2 {
  margin: 20px 0;
  font-size: clamp(38px, 4.1vw, 58px);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.section-heading p,
.architecture-copy > p,
.privacy-copy > p,
.contribute-panel > div > p {
  color: var(--muted);
  font-size: 17px;
}

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

.feature-card {
  position: relative;
  min-height: 290px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(16, 31, 47, 0.85), rgba(9, 21, 33, 0.86));
  overflow: hidden;
  transition: transform 180ms ease, border-color 180ms ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(43, 214, 232, 0.32);
}

.feature-card::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  right: -100px;
  bottom: -115px;
  border: 1px solid rgba(43, 214, 232, 0.08);
  border-radius: 50%;
  box-shadow: 0 0 0 38px rgba(43, 214, 232, 0.025), 0 0 0 76px rgba(43, 214, 232, 0.015);
}

.feature-wide {
  grid-column: 1 / -1;
  min-height: 320px;
  display: grid;
  grid-template-columns: auto 1fr 230px;
  gap: 30px;
  align-items: center;
}

.feature-index {
  position: absolute;
  top: 24px;
  right: 28px;
  color: rgba(126, 158, 178, 0.34);
  font: 700 11px/1 "Cascadia Mono", Consolas, monospace;
}

.feature-wide .feature-index {
  position: static;
  align-self: start;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.feature-label {
  color: var(--cyan);
  font: 700 10px/1.2 "Cascadia Mono", Consolas, monospace;
  letter-spacing: 0.1em;
}

.feature-card h3 {
  max-width: 510px;
  margin: 19px 0 13px;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.feature-wide h3 {
  font-size: 31px;
}

.feature-card p {
  max-width: 590px;
  margin-bottom: 0;
  color: #8fa3b3;
  font-size: 14px;
}

.mini-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 20px;
}

.mini-tags span {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: #8fa8b9;
  background: rgba(255, 255, 255, 0.02);
  font: 600 9px/1.2 "Cascadia Mono", Consolas, monospace;
  text-transform: uppercase;
}

.waveform {
  height: 125px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(1, 10, 16, 0.36);
}

.waveform i {
  width: 5px;
  height: var(--h);
  min-height: 8px;
  border-radius: 4px;
  background: linear-gradient(to top, rgba(43, 214, 232, 0.25), var(--cyan-bright));
  box-shadow: 0 0 14px rgba(43, 214, 232, 0.18);
}

.architecture {
  position: relative;
  border-block: 1px solid var(--line);
  background:
    radial-gradient(circle at 20% 50%, rgba(24, 117, 151, 0.12), transparent 32%),
    var(--bg-deep);
}

.architecture-layout {
  display: grid;
  grid-template-columns: 0.76fr 1.24fr;
  align-items: center;
  gap: 90px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--cyan-bright);
  font-weight: 700;
  font-size: 14px;
}

.text-link:hover {
  color: #b3f9fc;
}

.authority-stack {
  display: grid;
  gap: 11px;
}

.authority-card {
  display: grid;
  grid-template-columns: 45px 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(15, 29, 43, 0.76);
}

.authority-engine {
  border-color: rgba(43, 214, 232, 0.42);
  background: linear-gradient(90deg, rgba(43, 214, 232, 0.11), rgba(14, 30, 43, 0.88));
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.17);
}

.authority-number {
  color: #587184;
  font: 700 12px/1 "Cascadia Mono", Consolas, monospace;
}

.authority-card strong {
  font-size: 17px;
}

.authority-card p {
  margin: 4px 0 0;
  color: #8297a7;
  font-size: 12px;
}

.authority-badge {
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: #7590a2;
  font: 700 8px/1 "Cascadia Mono", Consolas, monospace;
  letter-spacing: 0.08em;
}

.authority-engine .authority-badge {
  border-color: rgba(43, 214, 232, 0.25);
  color: var(--cyan-bright);
}

.privacy {
  background: #081420;
}

.privacy-panel {
  display: grid;
  grid-template-columns: 1fr 0.86fr;
  gap: 80px;
  align-items: center;
  padding: 60px;
  border: 1px solid rgba(77, 224, 155, 0.21);
  border-radius: 24px;
  background:
    radial-gradient(circle at 100% 0, rgba(77, 224, 155, 0.11), transparent 36%),
    linear-gradient(140deg, #102232, #0a1825);
  box-shadow: var(--shadow);
}

.privacy-copy .eyebrow {
  color: var(--green);
}

.privacy-status {
  display: grid;
  gap: 10px;
}

.privacy-status > div {
  display: grid;
  grid-template-columns: 35px 1fr;
  align-items: center;
  gap: 13px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(2, 10, 16, 0.26);
}

.privacy-status p {
  display: grid;
  margin: 0;
}

.privacy-status strong {
  font-size: 13px;
}

.privacy-status small {
  color: #7f94a3;
  font-size: 11px;
}

.check {
  width: 29px;
  height: 29px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(77, 224, 155, 0.31);
  border-radius: 50%;
  color: var(--green);
  background: rgba(77, 224, 155, 0.08);
  font-size: 13px;
}

.contribute {
  background: var(--bg-deep);
}

.contribute-panel {
  position: relative;
  min-height: 410px;
  display: grid;
  grid-template-columns: 1fr 300px;
  align-items: center;
  gap: 70px;
  padding: 70px;
  border: 1px solid rgba(43, 214, 232, 0.32);
  border-radius: 24px;
  background:
    linear-gradient(120deg, rgba(23, 85, 110, 0.24), transparent 50%),
    #0d1c2a;
  overflow: hidden;
}

.contribute-panel > div:not(.contribute-orbit) {
  position: relative;
  z-index: 2;
}

.contribute-panel h2 {
  max-width: 700px;
}

.contribute-panel > div > p {
  max-width: 660px;
}

.contribute-actions {
  display: grid;
  gap: 10px;
}

.contribute-note {
  margin-top: 8px;
  color: #61798b;
  text-align: center;
  font: 600 9px/1.3 "Cascadia Mono", Consolas, monospace;
  text-transform: uppercase;
}

.contribute-orbit {
  position: absolute;
  width: 480px;
  height: 480px;
  right: -170px;
  top: -35px;
  border: 1px solid rgba(43, 214, 232, 0.12);
  border-radius: 50%;
  box-shadow: 0 0 0 55px rgba(43, 214, 232, 0.025), 0 0 0 110px rgba(43, 214, 232, 0.015);
}

.contribute-orbit::before,
.contribute-orbit::after {
  content: "";
  position: absolute;
  background: rgba(43, 214, 232, 0.12);
}

.contribute-orbit::before {
  width: 1px;
  height: 100%;
  left: 50%;
}

.contribute-orbit::after {
  width: 100%;
  height: 1px;
  top: 50%;
}

.final-cta {
  border-top: 1px solid var(--line);
  background: #08131e;
}

.final-cta .shell {
  min-height: 210px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
}

.final-cta h2 {
  margin: 10px 0 0;
  font-size: clamp(29px, 3.1vw, 42px);
}

.site-footer {
  padding: 70px 0 25px;
  border-top: 1px solid var(--line);
  background: #050c13;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 70px;
}

.footer-grid > div:first-child > p {
  max-width: 340px;
  margin-top: 18px;
  color: #6e8394;
  font-size: 13px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 150px);
  gap: 30px;
}

.footer-links > div {
  display: grid;
  align-content: start;
  gap: 8px;
}

.footer-links strong {
  margin-bottom: 8px;
  color: #60788a;
  font: 700 9px/1 "Cascadia Mono", Consolas, monospace;
  letter-spacing: 0.1em;
}

.footer-links a {
  color: #a7b7c3;
  font-size: 13px;
}

.footer-links a:hover {
  color: var(--cyan-bright);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  margin-top: 50px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: #52697a;
  font-size: 10px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

@media (max-width: 1050px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 65px;
  }

  .hero-copy {
    max-width: 730px;
  }

  .console-wrap {
    max-width: 680px;
    transform: none;
  }

  .hero {
    padding-top: 145px;
  }

  .architecture-layout {
    grid-template-columns: 1fr;
    gap: 55px;
  }

  .architecture-copy {
    max-width: 700px;
  }

  .privacy-panel {
    gap: 45px;
    padding: 45px;
  }
}

@media (max-width: 800px) {
  :root {
    --shell: min(680px, calc(100% - 30px));
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    left: 15px;
    right: 15px;
    display: none;
    align-items: stretch;
    gap: 3px;
    padding: 12px;
    border: 1px solid var(--line-strong);
    border-radius: 14px;
    background: rgba(8, 19, 30, 0.98);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    padding: 11px 12px;
    border-radius: 8px;
  }

  .site-nav a:hover {
    background: var(--cyan-dim);
  }

  .nav-github {
    margin-top: 5px;
    text-align: center;
  }

  .hero {
    min-height: auto;
    padding: 125px 0 80px;
  }

  h1 {
    font-size: clamp(43px, 11vw, 62px);
  }

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

  .proof-grid > div:nth-child(2) {
    border-right: 0;
  }

  .proof-grid > div:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .section {
    padding: 90px 0;
  }

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

  .feature-wide {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .feature-wide .feature-index {
    position: absolute;
    top: 24px;
    right: 28px;
    width: auto;
    height: auto;
    border: 0;
  }

  .waveform {
    height: 90px;
  }

  .privacy-panel {
    grid-template-columns: 1fr;
  }

  .contribute-panel {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 48px 35px;
  }

  .contribute-actions {
    max-width: 360px;
  }

  .final-cta .shell {
    grid-template-columns: auto 1fr;
    padding: 40px 0;
  }

  .final-cta .button {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .hero-lead {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .hero-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

  .hero-meta span::after {
    display: none;
  }

  .atc-console {
    padding: 11px;
  }

  .flight-strip {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .flight-strip > div:first-child {
    grid-column: 1 / -1;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
  }

  .flight-strip > div:not(:first-child) {
    padding-left: 0;
    border-left: 0;
  }

  .flight-strip > div:last-child {
    padding-left: 14px;
    border-left: 1px solid var(--line);
  }

  .exchange-row p {
    font-size: 10px;
  }

  .proof-grid span {
    font-size: 9px;
  }

  .feature-card {
    min-height: auto;
    padding: 27px 24px;
  }

  .feature-wide h3 {
    font-size: 25px;
  }

  .authority-card {
    grid-template-columns: 30px 1fr;
  }

  .authority-badge {
    display: none;
  }

  .privacy-panel {
    padding: 31px 23px;
  }

  .contribute-panel {
    padding: 38px 23px;
  }

  .final-cta .shell {
    grid-template-columns: 1fr;
  }

  .final-cta img {
    width: 54px;
  }

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

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

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

@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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}