@font-face {
  font-family: Golos;
  src: url("./assets/golos-cyrillic.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: Golos;
  src: url("./assets/golos-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
    U+2215, U+FEFF, U+FFFD;
}
:root {
  --bg: #0b1118;
  --surface: #111a24;
  --surface-up: #17232f;
  --ink: #f0f3f5;
  --muted: #a3adb7;
  --accent: #ff754e;
  --line: #2a3541;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  font-family: Golos, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  color-scheme: dark;
  font-synthesis: none;
  scroll-behavior: smooth;
  scroll-padding-top: 110px;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
}
body,
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button,
a {
  touch-action: manipulation;
}
button,
input {
  font: inherit;
}
button {
  cursor: pointer;
}
a {
  color: inherit;
  text-decoration: none;
}
button:disabled {
  cursor: not-allowed;
}
svg {
  display: block;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1,
h2,
h3 {
  text-wrap: balance;
}
p {
  text-wrap: pretty;
}
h1,
h2 {
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.08;
}
h3 {
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.3;
}
em {
  font-style: normal;
  color: var(--accent);
}
a,
button {
  outline-offset: 6px;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
}
main:focus {
  outline: none;
}
::selection {
  color: var(--bg);
  background: var(--accent);
}
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: #3b4a58;
  border-radius: 10px;
}
.shell {
  width: min(1312px, calc(100% - 112px));
  margin-inline: auto;
}
.icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}
.section {
  padding-block: 112px;
}
.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 12px 22px;
  background: var(--accent);
  color: var(--bg);
  transform: translateY(-200%);
}
.skip-link:focus {
  transform: none;
}
.site-header {
  position: absolute;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  background: transparent;
  transition: background 0.3s;
}
.site-header.scrolled {
  position: fixed;
  background: rgba(11, 17, 24, 0.97);
  border-bottom: 1px solid var(--line);
  animation: header-in 0.3s var(--ease);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100px;
  gap: 30px;
  border-bottom: 1px solid #ffffff24;
}
.scrolled .header-inner {
  height: 76px;
  border-bottom: 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}
.brand-icon {
  width: 38px;
  height: 38px;
  color: var(--accent);
}
.brand-word {
  font-size: 28px;
  font-weight: 750;
  line-height: 1;
  letter-spacing: -0.035em;
}
.brand-word > span {
  display: block;
  font-size: 9px;
  letter-spacing: 0.2em;
  font-weight: 500;
  margin-top: 7px;
}
.desktop-nav {
  display: flex;
  gap: 34px;
  color: #c4ccd4;
  font-size: 14px;
}
.desktop-nav a {
  position: relative;
  padding: 12px 0;
  transition: color 0.2s;
}
.desktop-nav a::after {
  content: "";
  position: absolute;
  bottom: 5px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.desktop-nav a:hover,
.desktop-nav a[aria-current] {
  color: var(--ink);
}
.desktop-nav a:hover::after,
.desktop-nav a[aria-current]::after {
  transform: scaleX(1);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}
.login-link {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 11px 16px;
  border: 1px solid #ffffff38;
  border-radius: 6px;
  font-size: 13px;
  transition:
    background 0.2s,
    border-color 0.2s;
}
.login-link:hover {
  background: #ffffff0c;
  border-color: var(--accent);
}
.login-link svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}
.menu-toggle {
  display: none;
}
.mobile-nav[hidden] {
  display: none;
}
.mobile-nav {
  padding: 16px 28px 28px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.mobile-nav a {
  display: block;
  padding: 12px 0;
}
.hero {
  height: min(880px, 100svh);
  min-height: 740px;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: #081322;
  --parallax: 0px;
}
.hero-image {
  position: absolute;
  inset: -8% -6% -6% 0;
  z-index: -3;
  transform: translateY(var(--parallax));
  will-change: transform;
  animation: hero-arrival 2s var(--ease) both;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 43%;
}
.hero-shade {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(
      90deg,
      rgba(5, 12, 22, 0.85) 0%,
      rgba(5, 12, 22, 0.44) 32%,
      rgba(5, 12, 22, 0.03) 61%
    ),
    linear-gradient(
      0deg,
      #0b1118 0%,
      transparent 20%,
      transparent 70%,
      #06111a66
    );
}
.hero-content {
  position: relative;
  padding-top: clamp(178px, 21vh, 218px);
}
.hero h1 {
  font-size: clamp(64px, 6.65vw, 96px);
  max-width: 860px;
  line-height: 1.06;
  letter-spacing: -0.04em;
}
.hero h1 > span {
  display: block;
  animation: headline-in 1.1s var(--ease) both;
}
.hero h1 > span:nth-child(2) {
  animation-delay: 0.12s;
}
.hero h1 em {
  color: var(--accent);
}
.hero-description {
  margin-top: 30px;
  font-size: 22px;
  line-height: 1.45;
  letter-spacing: -0.02em;
  animation: headline-in 1.2s 0.15s var(--ease) both;
}
.hero-sub {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: #b2becd;
  animation: headline-in 1.2s 0.2s var(--ease) both;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 32px;
  animation: headline-in 1.2s 0.25s var(--ease) both;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 14px 25px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 550;
  line-height: 1.5;
  transition:
    background 0.25s,
    transform 0.35s var(--ease),
    border-color 0.25s;
}
.button:hover {
  transform: translateY(-3px);
}
.button:active {
  transform: translateY(0);
}
.button-primary {
  background: var(--accent);
  color: #161719;
}
.button-primary:hover {
  background: #ff9273;
}
.hero-secondary {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 13px;
  color: #d3dbe4;
}
.play-icon {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid #ffffff4f;
  border-radius: 50%;
  transition: background 0.2s;
}
.play-icon .icon {
  width: 13px;
  height: 13px;
  fill: currentColor;
}
.hero-secondary:hover .play-icon {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.hero-caption {
  position: absolute;
  right: 6%;
  bottom: 25%;
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: #c5d2df;
  line-height: 1.7;
}
.crosshair {
  position: relative;
  width: 27px;
  height: 27px;
  border: 1px solid #c5d2df60;
  border-radius: 50%;
}
.crosshair::before,
.crosshair::after {
  content: "";
  position: absolute;
  background: #c5d2df;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.crosshair::before {
  width: 37px;
  height: 1px;
}
.crosshair::after {
  width: 1px;
  height: 37px;
}
.hero-bottom {
  position: absolute;
  bottom: 30px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #abb7c4;
}
.scroll-cue {
  display: flex;
  align-items: center;
  gap: 14px;
  letter-spacing: 0;
  font-size: 12px;
}
.scroll-line {
  height: 29px;
  width: 17px;
  border: 1px solid #8a9baa;
  border-radius: 12px;
  position: relative;
}
.scroll-line::after {
  content: "";
  position: absolute;
  top: 6px;
  left: 7px;
  width: 1px;
  height: 6px;
  background: var(--accent);
  animation: scroll-dot 1.8s ease-in-out infinite;
}
.hero-coordinate {
  display: flex;
  align-items: center;
  gap: 16px;
}
.hero-coordinate > span {
  font-size: 27px;
  color: var(--accent);
}
.flight-strip {
  border-block: 1px solid var(--line);
  overflow: hidden;
  padding-block: 21px;
  background: #101923;
}
.strip-track {
  display: flex;
  align-items: center;
  gap: 54px;
  width: max-content;
  animation: ticker 42s linear infinite;
  font-size: 15px;
  letter-spacing: 0.15em;
  font-weight: 500;
  color: #a3adb7;
}
.strip-track i {
  width: 6px;
  height: 6px;
  border: 1px solid #687785;
  transform: rotate(45deg);
}
.strip-track .strip-accent {
  color: var(--accent);
}
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 50px;
  margin-bottom: 45px;
}
.section-heading h2,
.approach h2,
.icao-content h2 {
  font-size: clamp(36px, 3.65vw, 52px);
}
.section-heading h2 span,
.icao-content h2 span {
  color: var(--muted);
}
.section-heading > p {
  font-size: 14px;
  color: #b8c2cc;
  line-height: 1.8;
  padding-bottom: 4px;
}
.section-heading > p > span {
  color: #d7dfe7;
}
.modules-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
}
.module-card {
  position: relative;
  display: flex;
  flex-direction: column;
  grid-column: span 3;
  padding: 26px 25px 27px;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface);
  transition:
    background 0.35s,
    border-color 0.35s,
    transform 0.5s var(--ease);
}
.module-card:hover {
  background: #182531;
  border-color: #57616b;
  transform: translateY(-5px);
}
.card-top {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 29px;
}
.card-top .icon {
  color: var(--accent);
  width: 24px;
  height: 24px;
}
.card-top > span {
  font-size: 11px;
  color: var(--muted);
}
.card-top .card-open {
  margin-left: auto;
  position: absolute;
  right: 24px;
  opacity: 0;
  transform: translateX(-8px);
  transition:
    opacity 0.25s,
    transform 0.25s;
  color: var(--accent);
  background: var(--surface);
  padding-left: 7px;
}
.module-card:hover .card-open,
.module-card:focus-visible .card-open {
  opacity: 1;
  transform: none;
}
.card-bottom {
  margin-top: auto;
  padding-top: 40px;
}
.card-bottom h3 {
  font-size: 21px;
  margin-bottom: 10px;
}
.card-bottom p {
  font-size: 13px;
  line-height: 1.75;
  color: #aeb9c5;
  max-width: 35ch;
}
.module-0 {
  grid-column: span 7;
  min-height: 347px;
  padding: 30px 34px;
  background: #17232e;
}
.module-1 {
  grid-column: span 5;
  min-height: 347px;
  padding: 30px 34px;
  background: #141e29;
}
.module-0 .card-bottom,
.module-1 .card-bottom {
  padding-top: 14px;
}
.module-0 h3,
.module-1 h3 {
  font-size: 28px;
}
.module-0 p,
.module-1 p {
  max-width: none;
  font-size: 14px;
}
.module-0 .card-top > span,
.module-1 .card-top > span {
  font-size: 12px;
}
.tags {
  display: flex;
  gap: 8px;
  margin-top: 19px;
}
.tags > span {
  padding: 4px 10px;
  font-size: 10px;
  color: #b7c5d1;
  border: 1px solid #43505c;
  border-radius: 4px;
}
.radio-visual {
  display: flex;
  gap: 20px;
  align-items: center;
  margin-top: 28px;
  margin-bottom: 12px;
  position: relative;
  min-height: 95px;
}
.radio-frequency {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  display: grid;
  grid-template-columns: 1fr auto;
  color: #8dbeab;
  flex-shrink: 0;
}
.radio-frequency > span {
  font-size: 10px;
  letter-spacing: 0.08em;
}
.radio-frequency > span:last-child {
  grid-column: 2;
  grid-row: 1;
  font-size: 9px;
  border: 1px solid #537e6b;
  padding-inline: 3px;
  align-self: center;
  margin-bottom: 3px;
}
.radio-frequency strong {
  font-size: 30px;
  font-weight: 400;
  letter-spacing: -0.03em;
  grid-column: span 2;
  line-height: 1.5;
}
.wave {
  height: 75px;
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  overflow: hidden;
  mask-image: linear-gradient(
    90deg,
    transparent,
    black 10%,
    black 85%,
    transparent
  );
}
.wave i {
  height: var(--height);
  width: 3px;
  flex: 1;
  background: #6b9e8b;
  border-radius: 2px;
  animation: wave 1.3s var(--delay) ease-in-out infinite alternate;
  transform-origin: center;
}
.radio-rule {
  display: flex;
  justify-content: space-between;
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  font-size: 8px;
  letter-spacing: 0.08em;
  color: #839593;
  border-top: 1px solid #8ebda027;
  padding-top: 4px;
}
.speech-visual {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-block: 18px 5px;
  min-height: 103px;
}
.speech-visual > span {
  font-size: 110px;
  line-height: 1;
  color: var(--accent);
  height: 85px;
  font-weight: 400;
}
.speech-visual > div {
  font-size: 25px;
  line-height: 1.35;
  font-weight: 450;
  letter-spacing: -0.03em;
}
.speech-visual em {
  color: #93a1ad;
}
.materials-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
  margin-top: 24px;
}
.materials-note .icon {
  width: 16px;
  height: 16px;
}
.approach {
  border-block: 1px solid var(--line);
  background: #0e1720;
  overflow: hidden;
}
.approach-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 45px;
}
.approach-heading > p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}
.flight-plan {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 65px;
  margin-top: 74px;
  --route-progress: 0;
}
.flight-plan-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 45px;
  height: 1px;
  background: var(--line);
}
.flight-plan-line > span {
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleX(var(--route-progress));
  transform-origin: left;
}
.route-aircraft {
  position: absolute;
  top: -13px;
  left: calc(var(--route-progress) * (100% - 25px));
  color: var(--accent);
  transform: rotate(45deg);
  z-index: 3;
}
.route-aircraft .icon {
  width: 27px;
  height: 27px;
  fill: #0e1720;
}
.waypoint {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 31px;
  margin-bottom: 24px;
  font-size: 10px;
  letter-spacing: 0.12em;
  color: #8a9aa7;
}
.waypoint > span:first-child {
  font-size: 12px;
  color: var(--accent);
}
.waypoint i {
  position: absolute;
  left: 0;
  bottom: 1px;
  width: 7px;
  height: 7px;
  background: #101923;
  border: 1px solid var(--accent);
  border-radius: 50%;
  z-index: 2;
}
.flight-step h3 {
  font-size: 21px;
  margin-bottom: 15px;
}
.flight-step p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  max-width: 32ch;
}
.icao-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
  align-items: center;
}
.icao-graphic {
  aspect-ratio: 1;
  position: relative;
  max-height: 450px;
  margin: 0 30px;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.orbit {
  position: absolute;
  border: 1px solid #2e3b46;
  border-radius: 50%;
  width: 90%;
  height: 90%;
}
.orbit-two {
  width: 65%;
  height: 65%;
  border-style: dashed;
  animation: orbit 100s linear infinite;
}
.orbit-three {
  width: 40%;
  height: 40%;
  border-color: #394550;
}
.icao-graphic::before,
.icao-graphic::after {
  content: "";
  position: absolute;
  background: #27343e;
}
.icao-graphic::before {
  width: 100%;
  height: 1px;
}
.icao-graphic::after {
  width: 1px;
  height: 100%;
}
.orbit-scanner {
  position: absolute;
  inset: 5%;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent 70%,
    #ff754e14 99%,
    #ff754e65
  );
  animation: orbit 14s linear infinite;
}
.icao-center {
  position: relative;
  text-align: center;
  font-size: 67px;
  font-weight: 600;
  letter-spacing: -0.04em;
  background: #0b1118;
  padding: 16px 20px;
  line-height: 1.1;
}
.icao-center > span {
  display: block;
  font-size: 8px;
  font-weight: 400;
  letter-spacing: 0.15em;
  margin-top: 8px;
  color: var(--muted);
}
.radar-point {
  position: absolute;
  width: 7px;
  height: 7px;
  border: 1px solid var(--accent);
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 6px #ff754e12;
}
.radar-point-one {
  top: 19%;
  left: 24%;
}
.radar-point-two {
  right: 14%;
  bottom: 29%;
}
.radar-label {
  position: absolute;
  bottom: 2%;
  font-size: 9px;
  letter-spacing: 0.13em;
  color: #7f919f;
  background: var(--bg);
  padding: 0 10px;
}
.icao-content > p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
  margin-top: 23px;
  max-width: 44ch;
}
.criteria {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 24px;
  margin-block: 28px 31px;
}
.criteria > span {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}
.criteria .icon {
  color: var(--accent);
  width: 16px;
  height: 16px;
}
.text-link {
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 7px;
  text-decoration-color: #738392;
  transition: color 0.2s;
}
.text-link:hover {
  color: var(--accent);
}
.boarding {
  display: grid;
  grid-template-columns: 1fr 285px;
  background: var(--accent);
  color: #161719;
  border-radius: 12px;
  margin-top: 8px;
  margin-bottom: 94px;
  position: relative;
  overflow: hidden;
}
.boarding-main {
  padding: 51px 54px;
}
.boarding h2 {
  font-size: 44px;
  letter-spacing: -0.04em;
}
.boarding p {
  margin-top: 12px;
  font-size: 15px;
}
.button-dark {
  margin-top: 27px;
  background: #111a22;
  color: var(--ink);
  font-size: 13px;
  padding-inline: 24px;
}
.button-dark:hover {
  background: #29313a;
}
.boarding-stub {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-left: 1px dashed #19202b55;
  position: relative;
  padding: 30px;
}
.boarding-stub::before,
.boarding-stub::after {
  content: "";
  position: absolute;
  left: -10px;
  width: 20px;
  height: 20px;
  background: var(--bg);
  border-radius: 50%;
}
.boarding-stub::before {
  top: -10px;
}
.boarding-stub::after {
  bottom: -10px;
}
.boarding-stub > span {
  font-size: 9px;
  letter-spacing: 0.12em;
}
.boarding-stub > .icon {
  margin-block: 20px 12px;
  transform: rotate(45deg);
  width: 27px;
  height: 27px;
}
.boarding-stub > div:not(.barcode) {
  display: flex;
  align-items: center;
  gap: 19px;
}
.boarding-stub strong {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.03em;
}
.boarding-stub > div > span {
  font-size: 10px;
}
.barcode {
  display: flex;
  align-items: stretch;
  gap: 3px;
  height: 26px;
  margin-block: 17px 13px;
}
.barcode i {
  display: block;
  background: #161719;
}
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-block: 36px 65px;
  gap: 30px;
}
.footer-brand {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.4;
}
.footer-brand > span {
  display: block;
  color: var(--muted);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0;
  margin-top: 5px;
}
.site-footer > div {
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: var(--muted);
  font-size: 11px;
}
.back-top {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 12px;
  color: #c2cbd4;
}
.back-top svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}
.motion-toggle {
  position: fixed;
  z-index: 35;
  bottom: 16px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 7px;
  color: #d1dae3;
  border: 1px solid #42505d;
  border-radius: 6px;
  background: #111a24;
  padding: 7px 10px;
  font-size: 10px;
}
.motion-toggle .icon {
  width: 12px;
  height: 12px;
}
.motion-toggle:disabled {
  cursor: default;
}
.inner-page {
  padding-top: 150px;
  min-height: calc(100svh - 162px);
}
.detail-page {
  padding-bottom: 90px;
}
.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  display: inline-block;
  padding-block: 6px;
}
.breadcrumb:hover {
  color: var(--accent);
}
.detail-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 50px;
  padding: 34px 0 52px;
  border-bottom: 1px solid var(--line);
}
.detail-heading h1 {
  font-size: clamp(40px, 5vw, 70px);
  max-width: 18ch;
}
.detail-heading p {
  margin-top: 22px;
  max-width: 62ch;
  font-size: 16px;
  color: var(--muted);
}
.detail-symbol {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 140px;
  height: 140px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--accent);
}
.detail-symbol .icon {
  width: 55px;
  height: 55px;
  stroke-width: 1;
}
.detail-layout {
  display: grid;
  grid-template-columns: 290px 1fr;
  gap: 60px;
  padding-top: 46px;
}
.section-nav h2 {
  font-size: 15px;
  margin-bottom: 20px;
  letter-spacing: 0;
  font-weight: 500;
}
.section-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  font-size: 13px;
  color: var(--muted);
  border-radius: 5px;
  margin-bottom: 3px;
}
.section-nav .icon {
  width: 18px;
  height: 18px;
}
.section-nav a:hover {
  background: var(--surface);
}
.section-nav a[aria-current] {
  background: #ff754e14;
  color: var(--accent);
}
.empty-state {
  padding: 48px 50px;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-align: center;
  background: var(--surface);
}
.empty-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 22px;
  background: var(--surface-up);
  border-radius: 12px;
  color: var(--accent);
}
.empty-state h2 {
  font-size: 30px;
  margin-bottom: 15px;
}
.empty-state > p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}
.planned-topics {
  text-align: left;
  margin: 30px auto;
  max-width: 420px;
}
.planned-topics > span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 12px;
}
.planned-topics > div {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-block: 13px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.planned-topics .icon {
  width: 15px;
  height: 15px;
  color: var(--muted);
}
.planned-topics .soon-label {
  margin-left: auto;
  font-size: 10px;
  color: var(--muted);
}
.button-outline {
  border-color: #53616e;
  color: var(--ink);
  font-size: 13px;
  background: transparent;
}
.button-outline:hover {
  background: var(--surface-up);
  border-color: var(--accent);
}
.account-page {
  padding-bottom: 120px;
}
.account-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 100px;
  padding-top: 56px;
}
.account-intro h1 {
  font-size: clamp(44px, 5.5vw, 76px);
}
.account-intro > p {
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
  margin-top: 28px;
}
.account-frequency {
  max-width: 350px;
  margin-top: 54px;
}
.account-frequency > span {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.account-frequency .wave {
  height: 65px;
  margin-top: 25px;
}
.account-frequency .wave i {
  background: var(--accent);
}
.account-panel {
  padding: 40px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.account-panel-top {
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 35px;
}
.account-panel-top .icon {
  color: var(--accent);
  width: 20px;
  height: 20px;
}
.account-panel h2 {
  font-size: 34px;
}
.account-panel > p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  margin-top: 20px;
}
.account-status {
  color: var(--accent);
  font-size: 12px;
  margin: 23px 0;
}
.button-disabled {
  width: 100%;
  background: #26323e;
  color: #a5b0bc;
  transform: none !important;
}
.account-panel .text-link {
  display: block;
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
}
.account-footnote {
  font-size: 11px;
  color: var(--muted);
  padding-top: 23px;
  margin-top: 30px;
  border-top: 1px solid var(--line);
}
.not-found {
  padding-block: 80px 140px;
}
.not-found h1 {
  font-size: 60px;
}
.not-found p {
  color: var(--muted);
  margin-block: 25px;
}
.no-script {
  padding: 160px 10%;
  background: var(--bg);
}
/* Content stays visible without JavaScript or before observation. */
.reveal.in-view {
  animation: reveal 0.85s var(--ease) both;
  animation-delay: calc(var(--order, 0) * 55ms);
}
@keyframes reveal {
  from {
    opacity: 0.35;
    transform: translateY(24px);
    clip-path: inset(0 0 8% 0);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    clip-path: inset(0);
  }
}
@keyframes headline-in {
  from {
    opacity: 0;
    transform: translateY(26px);
    filter: blur(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}
@keyframes hero-arrival {
  from {
    opacity: 0.6;
    scale: 1.05;
  }
  to {
    opacity: 1;
    scale: 1;
  }
}
@keyframes header-in {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}
@keyframes scroll-dot {
  0%,
  100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  50% {
    transform: translateY(8px);
    opacity: 1;
  }
}
@keyframes ticker {
  to {
    transform: translateX(-50%);
  }
}
@keyframes wave {
  from {
    transform: scaleY(0.4);
  }
  to {
    transform: scaleY(1);
  }
}
@keyframes orbit {
  to {
    transform: rotate(360deg);
  }
}
.motion-paused {
  scroll-behavior: auto;
}
.motion-paused *,
.motion-paused *::before,
.motion-paused *::after {
  animation: none !important;
  transition: none !important;
}
.motion-paused .hero-image {
  transform: none !important;
}
.motion-paused .reveal {
  opacity: 1;
  transform: none;
  clip-path: none;
}
@media (min-width: 1600px) {
  .hero-image {
    inset: -15% 0 -15% 0;
  }
  .hero-image img {
    object-position: center 46%;
  }
}
@media (max-width: 1100px) {
  .shell {
    width: calc(100% - 72px);
  }
  .desktop-nav {
    gap: 20px;
    font-size: 12px;
  }
  .login-link {
    font-size: 12px;
    padding: 10px 12px;
  }
  .hero h1 {
    font-size: 76px;
  }
  .hero-image {
    inset: -2% -28% -2% -4%;
  }
  .hero-content {
    padding-top: 195px;
  }
  .hero-caption {
    bottom: 20%;
    right: 5%;
  }
  .hero-shade {
    background:
      linear-gradient(90deg, #06101be6, #06101b50 65%, transparent),
      linear-gradient(0deg, var(--bg), transparent 25%);
  }
  .hero-actions {
    gap: 20px;
  }
  .hero-secondary {
    font-size: 12px;
  }
  .section {
    padding-block: 85px;
  }
  .module-card {
    grid-column: span 6;
  }
  .module-0,
  .module-1 {
    padding: 26px;
  }
  .card-bottom h3 {
    font-size: 22px;
  }
  .module-0 h3,
  .module-1 h3 {
    font-size: 27px;
  }
  .speech-visual > div {
    font-size: 21px;
  }
  .radio-visual {
    gap: 12px;
  }
  .wave {
    gap: 3px;
  }
  .radio-frequency strong {
    font-size: 25px;
  }
  .section-heading > p {
    font-size: 13px;
  }
  .flight-plan {
    gap: 35px;
  }
  .flight-step h3 {
    font-size: 19px;
  }
  .icao-section {
    gap: 40px;
  }
  .icao-graphic {
    margin: 0;
  }
  .icao-content h2 {
    font-size: 39px;
  }
  .criteria {
    gap: 12px;
    font-size: 12px;
  }
  .boarding {
    grid-template-columns: 1fr 230px;
  }
  .boarding-main {
    padding: 42px 38px;
  }
  .boarding h2 {
    font-size: 37px;
  }
  .detail-layout {
    grid-template-columns: 235px 1fr;
    gap: 28px;
  }
  .account-layout {
    gap: 45px;
  }
  .account-panel {
    padding: 30px;
  }
}
@media (max-width: 800px) {
  .shell {
    width: calc(100% - 48px);
  }
  .desktop-nav {
    display: none;
  }
  .header-inner {
    height: 82px;
  }
  .scrolled .header-inner {
    height: 70px;
  }
  .brand-word {
    font-size: 25px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
  }
  .menu-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: none;
    border: 0;
    color: var(--ink);
    width: 40px;
    height: 44px;
    padding: 8px;
  }
  .menu-toggle > span {
    width: 22px;
    height: 1px;
    background: currentColor;
    transition: transform 0.2s;
  }
  .menu-toggle[aria-expanded="true"] > span:first-child {
    transform: translateY(3.5px) rotate(45deg);
  }
  .menu-toggle[aria-expanded="true"] > span:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
  }
  .header-actions {
    gap: 10px;
  }
  .login-link {
    font-size: 11px;
  }
  .hero {
    height: 850px;
    min-height: 0;
    max-height: none;
  }
  .hero-content {
    padding-top: 149px;
  }
  .hero h1 {
    font-size: clamp(52px, 9.5vw, 76px);
  }
  .hero-description {
    font-size: 20px;
    margin-top: 25px;
  }
  .hero-sub {
    font-size: 13px;
  }
  .hero-image {
    inset: 14% -41% -10% -15%;
    opacity: 0.85;
  }
  .hero-image img {
    object-position: 55% 65%;
  }
  .hero-shade {
    background:
      linear-gradient(
        180deg,
        #081322 8%,
        #081322bd 26%,
        #08132210 57%,
        #0b1118 100%
      ),
      linear-gradient(90deg, #06101b99, transparent 85%);
  }
  .hero-actions {
    margin-top: 27px;
  }
  .hero-caption {
    bottom: 18%;
    right: 8%;
    font-size: 9px;
  }
  .hero-bottom {
    bottom: 28px;
  }
  .hero-note {
    display: none;
  }
  .flight-strip {
    padding-block: 17px;
  }
  .strip-track {
    font-size: 12px;
    gap: 32px;
  }
  .section-heading,
  .approach-heading {
    align-items: flex-start;
    gap: 24px;
    flex-direction: column;
  }
  .section-heading h2,
  .approach h2 {
    font-size: 42px;
  }
  .section-heading p br,
  .approach-heading p br {
    display: none;
  }
  .section-heading > p,
  .approach-heading > p {
    max-width: 52ch;
    font-size: 14px;
  }
  .section-heading > p > span {
    display: block;
  }
  .modules-grid {
    gap: 14px;
  }
  .module-card {
    padding: 24px;
  }
  .module-0,
  .module-1 {
    grid-column: span 12;
    min-height: 330px;
  }
  .module-1 {
    min-height: 310px;
  }
  .module-0 .radio-visual {
    max-width: 100%;
    margin-block: 23px 10px;
  }
  .module-0 .card-bottom p {
    max-width: none;
  }
  .radio-frequency strong {
    font-size: 34px;
  }
  .wave {
    gap: 5px;
  }
  .speech-visual > div {
    font-size: 28px;
  }
  .module-card:not(.module-0):not(.module-1) .card-top > span:not(.card-open) {
    display: none;
  }
  .flight-plan {
    gap: 25px;
  }
  .flight-step h3 {
    font-size: 19px;
  }
  .flight-step p {
    font-size: 13px;
  }
  .waypoint {
    font-size: 9px;
  }
  .icao-section {
    grid-template-columns: 1fr 1.2fr;
    gap: 28px;
  }
  .icao-content h2 {
    font-size: 33px;
  }
  .icao-content > p {
    font-size: 14px;
  }
  .criteria {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .icao-center {
    font-size: 40px;
    padding: 8px;
  }
  .icao-center > span {
    font-size: 6px;
  }
  .radar-label {
    font-size: 7px;
  }
  .boarding {
    grid-template-columns: 1fr 185px;
    margin-bottom: 70px;
  }
  .boarding-main {
    padding: 36px 30px;
  }
  .boarding h2 {
    font-size: 32px;
  }
  .boarding p {
    font-size: 13px;
  }
  .boarding-stub {
    padding: 20px;
  }
  .boarding-stub strong {
    font-size: 25px;
  }
  .site-footer {
    flex-wrap: wrap;
    padding-bottom: 70px;
  }
  .site-footer > div {
    font-size: 10px;
  }
  .back-top {
    margin-left: auto;
  }
  .inner-page {
    padding-top: 120px;
  }
  .detail-heading {
    gap: 24px;
  }
  .detail-heading h1 {
    font-size: 44px;
  }
  .detail-symbol {
    width: 85px;
    height: 85px;
  }
  .detail-symbol .icon {
    width: 35px;
    height: 35px;
  }
  .detail-layout {
    grid-template-columns: 1fr;
  }
  .section-nav {
    display: flex;
    gap: 7px;
    overflow: auto;
    padding-bottom: 10px;
  }
  .section-nav h2 {
    display: none;
  }
  .section-nav a {
    white-space: nowrap;
    border: 1px solid var(--line);
    margin: 0;
    padding: 10px 12px;
    font-size: 12px;
  }
  .section-nav .icon {
    display: none;
  }
  .empty-state {
    padding: 40px 26px;
  }
  .account-layout {
    gap: 40px;
    grid-template-columns: 1fr;
    max-width: 580px;
    margin-inline: auto;
    padding-top: 30px;
  }
  .account-frequency {
    display: none;
  }
  .account-intro h1 {
    font-size: 55px;
  }
  .account-intro > p {
    font-size: 16px;
  }
  .account-panel {
    padding: 35px;
  }
  .account-page {
    padding-bottom: 75px;
  }
}
@media (max-width: 520px) {
  .shell {
    width: calc(100% - 40px);
  }
  .login-link {
    border: 0;
    padding: 10px 2px;
  }
  .login-link > span {
    display: none;
  }
  .login-link svg {
    width: 21px;
    height: 21px;
  }
  .header-actions {
    gap: 11px;
  }
  .brand-word {
    font-size: 24px;
  }
  .brand-word > span {
    font-size: 8px;
  }
  .hero {
    height: 830px;
  }
  .hero-content {
    padding-top: 134px;
  }
  .hero h1 {
    font-size: clamp(40px, 10.9vw, 56px);
    line-height: 1.1;
  }
  .hero-description {
    font-size: 19px;
    margin-top: 23px;
  }
  .hero-sub {
    font-size: 12px;
    max-width: 31ch;
    margin-top: 13px;
  }
  .hero-sub br {
    display: none;
  }
  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
    margin-top: 26px;
  }
  .hero-actions .button {
    min-height: 51px;
    font-size: 13px;
    padding-inline: 22px;
  }
  .hero-secondary {
    font-size: 12px;
  }
  .hero-image {
    inset: 30% -57% -5% -20%;
    opacity: 1;
  }
  .hero-image img {
    object-position: 58% 62%;
  }
  .hero-shade {
    background: linear-gradient(
      180deg,
      #081322 30%,
      #081322c9 47%,
      #08132200 65%,
      #0b1118 100%
    );
  }
  .hero-caption {
    bottom: 16%;
    right: 7%;
    font-size: 7px;
    gap: 11px;
  }
  .crosshair {
    width: 20px;
    height: 20px;
  }
  .crosshair::before {
    width: 28px;
  }
  .crosshair::after {
    height: 28px;
  }
  .hero-bottom {
    font-size: 9px;
    bottom: 26px;
  }
  .scroll-cue {
    font-size: 11px;
  }
  .hero-coordinate {
    font-size: 9px;
  }
  .section {
    padding-block: 65px;
  }
  .section-heading {
    margin-bottom: 29px;
    gap: 21px;
  }
  .section-heading h2,
  .approach h2 {
    font-size: 34px;
    line-height: 1.15;
  }
  .section-heading > p,
  .approach-heading > p {
    font-size: 13px;
  }
  .modules-grid {
    gap: 12px;
  }
  .module-card {
    padding: 23px;
    grid-column: span 12;
  }
  .module-0,
  .module-1 {
    min-height: 330px;
  }
  .module-1 {
    min-height: 310px;
  }
  .module-card:not(.module-0):not(.module-1) {
    min-height: 170px;
  }
  .module-card:not(.module-0):not(.module-1) .card-top > span:not(.card-open) {
    display: block;
  }
  .card-top > span {
    font-size: 10px;
  }
  .module-0 .card-top > span,
  .module-1 .card-top > span {
    font-size: 11px;
  }
  .card-bottom {
    padding-top: 25px;
  }
  .card-bottom h3 {
    font-size: 23px;
  }
  .module-0 h3,
  .module-1 h3 {
    font-size: 27px;
  }
  .card-bottom p {
    font-size: 13px;
    max-width: none;
  }
  .module-0 p,
  .module-1 p {
    font-size: 13px;
  }
  .radio-frequency strong {
    font-size: 26px;
  }
  .radio-visual {
    gap: 15px;
  }
  .wave {
    gap: 3px;
    height: 67px;
  }
  .radio-rule {
    font-size: 7px;
  }
  .speech-visual > div {
    font-size: 24px;
  }
  .speech-visual > span {
    font-size: 95px;
  }
  .tags > span {
    font-size: 9px;
  }
  .materials-note {
    align-items: flex-start;
    justify-content: flex-start;
    font-size: 11px;
    gap: 9px;
    line-height: 1.8;
  }
  .materials-note .icon {
    margin-top: 3px;
  }
  .flight-plan {
    grid-template-columns: 1fr;
    gap: 35px;
    margin-top: 40px;
    padding-left: 28px;
  }
  .flight-plan-line {
    left: 4px;
    top: 8px;
    bottom: 8px;
    right: auto;
    width: 1px;
    height: auto;
  }
  .flight-plan-line > span {
    transform: scaleY(var(--route-progress));
    transform-origin: top;
  }
  .route-aircraft {
    top: calc(var(--route-progress) * (100% - 25px));
    left: -12px;
    transform: rotate(135deg);
  }
  .waypoint {
    justify-content: flex-start;
    gap: 15px;
    padding-bottom: 0;
    margin-bottom: 11px;
  }
  .waypoint i {
    left: -27px;
    top: 5px;
    bottom: auto;
  }
  .flight-step h3 {
    font-size: 22px;
    margin-bottom: 11px;
  }
  .flight-step p {
    max-width: none;
    font-size: 13px;
  }
  .icao-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .icao-graphic {
    width: 80%;
    max-width: 300px;
    justify-self: center;
    grid-row: 2;
  }
  .icao-content h2 {
    font-size: 34px;
  }
  .icao-content > p {
    font-size: 14px;
  }
  .criteria {
    grid-template-columns: 1fr 1fr;
    gap: 14px 10px;
  }
  .criteria > span {
    font-size: 11px;
    gap: 7px;
  }
  .icao-center {
    font-size: 48px;
  }
  .icao-center > span {
    font-size: 7px;
  }
  .boarding {
    grid-template-columns: 1fr;
    margin-top: 0;
    margin-bottom: 55px;
  }
  .boarding-main {
    padding: 35px 26px;
  }
  .boarding h2 {
    font-size: 36px;
    max-width: 10ch;
  }
  .boarding p {
    font-size: 13px;
    max-width: 25ch;
  }
  .boarding-stub {
    border-left: 0;
    border-top: 1px dashed #19202b55;
    flex-direction: row;
    justify-content: space-between;
    padding: 20px 26px;
    gap: 16px;
  }
  .boarding-stub::before,
  .boarding-stub::after {
    top: -10px;
  }
  .boarding-stub::before {
    left: -10px;
  }
  .boarding-stub::after {
    left: auto;
    right: -10px;
  }
  .boarding-stub > span {
    display: none;
  }
  .boarding-stub > .icon {
    margin: 0;
    width: 22px;
    height: 22px;
  }
  .boarding-stub > div:not(.barcode) {
    gap: 12px;
  }
  .boarding-stub strong {
    font-size: 23px;
  }
  .barcode {
    height: 23px;
    gap: 2px;
    max-width: 80px;
    overflow: hidden;
    margin: 0;
  }
  .boarding-stub > div > span {
    font-size: 8px;
  }
  .site-footer {
    gap: 24px;
    align-items: flex-start;
    padding-block: 28px 78px;
  }
  .footer-brand {
    font-size: 24px;
  }
  .footer-brand > span {
    font-size: 10px;
  }
  .site-footer > div {
    order: 3;
    width: 100%;
    font-size: 10px;
  }
  .back-top {
    font-size: 11px;
    margin-top: 7px;
    gap: 5px;
  }
  .motion-toggle {
    bottom: 12px;
    right: 12px;
    font-size: 9px;
    padding: 6px 8px;
  }
  .detail-heading {
    padding-top: 25px;
    align-items: flex-start;
    gap: 15px;
  }
  .detail-heading h1 {
    font-size: 36px;
  }
  .detail-heading p {
    font-size: 14px;
    line-height: 1.8;
  }
  .detail-symbol {
    display: none;
  }
  .detail-layout {
    padding-top: 25px;
    gap: 20px;
  }
  .empty-state {
    padding: 32px 20px;
  }
  .empty-state h2 {
    font-size: 26px;
  }
  .empty-state > p {
    font-size: 13px;
  }
  .planned-topics > div {
    font-size: 12px;
    gap: 9px;
  }
  .planned-topics .soon-label {
    font-size: 9px;
  }
  .empty-state .button {
    font-size: 12px;
    padding-inline: 13px;
  }
  .account-intro h1 {
    font-size: 48px;
  }
  .account-intro > p {
    font-size: 14px;
  }
  .account-panel {
    padding: 28px 23px;
  }
  .account-panel h2 {
    font-size: 31px;
  }
  .account-panel > p {
    font-size: 14px;
  }
  .not-found h1 {
    font-size: 40px;
  }
  .not-found p {
    font-size: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .hero-image {
    transform: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
    clip-path: none;
  }
}