:root {
  --night: #071821;
  --night-2: #0d2832;
  --ink: #0d2229;
  --muted: #52636a;
  --line: #cdd5d2;
  --mist: #e8ece7;
  --paper: #f4f6ee;
  --white: #fbfcf8;
  --lime: #b8f34b;
  --lime-dark: #7caa20;
  --aqua: #78b8c7;
  --radius: 18px;
  --shell: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
svg { display: block; }
.shell { width: min(calc(100% - 40px), var(--shell)); margin-inline: auto; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 100; padding: 10px 14px; background: var(--lime); color: var(--night); font-weight: 800; transform: translateY(-160%); }
.skip-link:focus { transform: none; }
:focus-visible { outline: 3px solid var(--lime-dark); outline-offset: 4px; }

.site-header { position: absolute; inset: 0 0 auto; z-index: 10; color: var(--paper); }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid rgba(244,246,238,.15); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; font-size: 1.08rem; letter-spacing: -.025em; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid currentColor; border-radius: 50%; color: var(--lime); font-size: .78rem; letter-spacing: -.12em; padding-right: 2px; }
.main-nav { display: flex; align-items: center; gap: clamp(16px, 2.6vw, 34px); font-size: .88rem; }
.main-nav a { color: rgba(244,246,238,.76); text-decoration: none; transition: color 160ms ease; }
.main-nav a:hover { color: var(--white); }
.main-nav .nav-cta { padding: 9px 16px; border: 1px solid rgba(184,243,75,.7); border-radius: 999px; color: var(--lime); }

.hero { position: relative; min-height: 790px; padding: 150px 0 90px; overflow: hidden; background: var(--night); color: var(--paper); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .35; background-image: linear-gradient(rgba(120,184,199,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(120,184,199,.045) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to bottom, #000 0%, transparent 88%); }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, .9fr) minmax(440px, 1.1fr); align-items: center; gap: clamp(44px, 7vw, 92px); }
.eyebrow, .section-index { margin: 0 0 22px; font-size: .73rem; line-height: 1.2; font-weight: 800; letter-spacing: .17em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--aqua); }
.eyebrow span { width: 30px; height: 1px; background: var(--lime); }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 700px; margin-bottom: 27px; font-size: clamp(3.3rem, 6.2vw, 6.2rem); line-height: .93; letter-spacing: -.07em; font-weight: 720; }
h1 em { color: var(--lime); font-style: normal; }
.hero-lead { max-width: 590px; margin-bottom: 34px; color: rgba(244,246,238,.76); font-size: clamp(1.08rem, 1.6vw, 1.28rem); line-height: 1.58; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 25px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 58px; padding: 10px 22px; border-radius: 12px; font-weight: 750; line-height: 1.05; text-decoration: none; transition: transform 160ms ease, background 160ms ease; }
.button:hover { transform: translateY(-2px); }
.button svg { width: 25px; height: 25px; fill: currentColor; }
.button span { display: flex; flex-direction: column; gap: 4px; }
.button small { font-size: .66rem; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; }
.button-primary { background: var(--lime); color: var(--night); box-shadow: 0 12px 34px rgba(184,243,75,.12); }
.button-primary:hover { background: #c3fa5d; }
.text-link { display: inline-flex; align-items: center; gap: 11px; color: var(--paper); text-underline-offset: 5px; font-weight: 700; }
.text-link span { color: var(--lime); }
.hero-note { max-width: 560px; margin: 30px 0 0; padding-left: 14px; border-left: 2px solid rgba(120,184,199,.35); color: rgba(244,246,238,.47); font-size: .76rem; line-height: 1.55; }

.flight-visual { position: relative; aspect-ratio: 1 / 1.04; overflow: hidden; border: 1px solid rgba(120,184,199,.2); border-radius: 30px; background: #0a2029; box-shadow: 0 35px 80px rgba(0,0,0,.32); }
.flight-visual::after { content: ""; position: absolute; inset: auto 0 0; height: 26%; background: linear-gradient(transparent, rgba(7,24,33,.9)); pointer-events: none; }
.visual-topline { position: absolute; z-index: 2; inset: 0 0 auto; height: 60px; display: flex; align-items: center; justify-content: space-between; padding: 0 22px; border-bottom: 1px solid rgba(120,184,199,.15); color: rgba(244,246,238,.48); font-size: .62rem; font-weight: 800; letter-spacing: .13em; }
.signal { display: flex; align-items: center; gap: 8px; }
.signal i { width: 6px; height: 6px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 5px rgba(184,243,75,.08); }
.map-field { position: absolute; inset: 18px -2% -2%; width: 104%; height: 104%; }
.visual-label { position: absolute; z-index: 3; display: flex; flex-direction: column; min-width: 118px; padding: 12px 14px; border: 1px solid rgba(120,184,199,.2); border-radius: 12px; color: var(--paper); background: rgba(7,24,33,.86); box-shadow: 0 10px 28px rgba(0,0,0,.2); }
.visual-label b { font-size: .77rem; }
.visual-label span { color: rgba(244,246,238,.48); font-size: .68rem; }
.visual-label-a { top: 24%; right: 7%; }
.visual-label-b { bottom: 18%; left: 7%; }
.visual-coordinate { position: absolute; z-index: 3; right: 22px; bottom: 19px; color: rgba(244,246,238,.35); font: 700 .62rem/1 system-ui, sans-serif; letter-spacing: .1em; }
.alisio-glyph { position: absolute; z-index: 4; left: 50%; bottom: 4%; width: 80px; transform: translateX(-50%); }
.alisio-glyph svg { width: 100%; }

.intro { padding: 120px 0; background: var(--paper); }
.intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(50px, 9vw, 130px); }
.section-index { color: #607178; }
h2 { margin-bottom: 0; font-size: clamp(2.35rem, 4.3vw, 4.6rem); line-height: 1.02; letter-spacing: -.055em; font-weight: 720; }
.intro-copy { padding-top: 54px; }
.intro-copy p { max-width: 560px; margin-bottom: 22px; color: var(--muted); font-size: 1.08rem; }
.intro-copy p:first-child { color: var(--ink); font-size: clamp(1.25rem, 2vw, 1.55rem); line-height: 1.45; }

.features { padding: 116px 0 128px; background: var(--mist); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 58px; }
.section-heading > p { max-width: 310px; margin: 0 0 5px; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.feature { position: relative; min-height: 340px; padding: 34px; overflow: hidden; border: 1px solid #d4dbd7; border-radius: var(--radius); background: rgba(251,252,248,.62); }
.feature-wide { min-height: 380px; }
.feature-icon { display: grid; place-items: center; width: 54px; height: 54px; margin-bottom: 58px; border: 1px solid #b9c5c1; border-radius: 50%; }
.feature-icon svg { width: 28px; height: 28px; fill: none; stroke: var(--ink); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.feature-number { position: absolute; top: 34px; right: 34px; color: #81908f; font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
.feature h3 { max-width: 440px; margin-bottom: 12px; font-size: clamp(1.45rem, 2.5vw, 2.2rem); line-height: 1.08; letter-spacing: -.04em; }
.feature > p:last-of-type { max-width: 470px; margin: 0; color: var(--muted); }
.feature-wide:first-child { background: var(--night); color: var(--paper); }
.feature-wide:first-child .feature-icon { border-color: rgba(184,243,75,.4); }
.feature-wide:first-child .feature-icon svg { stroke: var(--lime); }
.feature-wide:first-child .feature-number { color: rgba(244,246,238,.4); }
.feature-wide:first-child > p:last-of-type { color: rgba(244,246,238,.62); }
.altitude-scale { position: absolute; right: 34px; bottom: 34px; left: 34px; display: flex; justify-content: space-between; padding-top: 12px; border-top: 1px solid rgba(184,243,75,.25); color: var(--lime); font-size: .67rem; font-weight: 800; letter-spacing: .08em; }
.altitude-scale::before { content: ""; position: absolute; top: -2px; left: 42%; width: 18%; height: 3px; background: var(--lime); }
.feature-map { background: #dfe6e1; }
.map-lines { position: absolute; right: -40px; bottom: -45px; width: 260px; height: 210px; transform: rotate(-8deg); }
.map-lines i { position: absolute; inset: calc(var(--i, 0) * 24px); border: 1px solid rgba(7,24,33,.12); border-radius: 44% 56% 37% 63%; }
.map-lines i:nth-child(1) { --i: 0; }
.map-lines i:nth-child(2) { --i: 1; }
.map-lines i:nth-child(3) { --i: 2; border-color: rgba(124,170,32,.4); }

.about { padding: 130px 0; background: var(--paper); }
.about-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: clamp(50px, 10vw, 150px); }
.about-monogram { position: relative; display: flex; align-items: flex-end; justify-content: space-between; width: min(100%, 380px); aspect-ratio: 1.15; padding: 30px; border: 1px solid var(--line); border-radius: 28px; color: var(--night); background: linear-gradient(145deg, #eef1ec, #dfe5e1); font-size: clamp(4rem, 9vw, 8rem); font-weight: 850; line-height: .75; letter-spacing: -.11em; }
.about-monogram::before { content: ""; position: absolute; inset: 18px; border: 1px solid rgba(82,99,106,.18); border-radius: 18px; }
.about-monogram span { color: var(--lime-dark); font-size: 1.4rem; letter-spacing: 0; }
.about-copy h2 { margin-bottom: 28px; }
.about-copy > p:last-child { max-width: 610px; margin: 0; color: var(--muted); font-size: 1.08rem; }

.final-cta { padding: 0 0 30px; background: var(--paper); }
.cta-panel { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: clamp(38px, 7vw, 78px); overflow: hidden; border-radius: 28px; color: var(--paper); background: var(--night); }
.cta-panel::after { content: ""; position: absolute; right: -60px; bottom: -150px; width: 440px; height: 440px; border: 70px solid rgba(184,243,75,.08); border-radius: 50%; }
.cta-panel > * { position: relative; z-index: 1; }
.cta-panel .section-index { color: var(--aqua); }
.cta-panel h2 { font-size: clamp(2.15rem, 4.3vw, 4.2rem); }
.button-light { flex: 0 0 auto; background: var(--paper); color: var(--night); }
.button-light:hover { background: var(--lime); }

.site-footer { padding: 80px 0 28px; color: var(--paper); background: var(--night); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 50px; padding-bottom: 62px; }
.footer-brand { margin-bottom: 17px; }
.footer-grid > div:first-child p { color: rgba(244,246,238,.48); }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links p { margin-bottom: 10px; color: rgba(244,246,238,.38); font-size: .72rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.footer-links a { width: fit-content; color: rgba(244,246,238,.75); text-underline-offset: 4px; text-decoration-color: transparent; }
.footer-links a:hover { color: var(--lime); text-decoration-color: currentColor; }
.footer-bottom { display: flex; justify-content: space-between; padding-top: 24px; border-top: 1px solid rgba(244,246,238,.12); color: rgba(244,246,238,.38); font-size: .76rem; letter-spacing: .04em; }

@media (max-width: 900px) {
  .header-inner { min-height: 78px; }
  .main-nav a:not(.nav-cta) { display: none; }
  .hero { min-height: auto; padding-top: 132px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 690px; }
  .flight-visual { width: min(100%, 650px); justify-self: center; }
  .intro-grid, .about-grid { grid-template-columns: 1fr; }
  .intro-copy { padding-top: 0; }
  .about-monogram { width: min(76%, 360px); }
  .cta-panel { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 640px) {
  .shell { width: min(calc(100% - 32px), var(--shell)); }
  .main-nav { gap: 10px; }
  .main-nav .nav-cta { padding: 8px 12px; }
  .hero { padding: 120px 0 64px; }
  h1 { font-size: clamp(3.05rem, 15vw, 4.4rem); }
  .hero-lead { font-size: 1.04rem; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 18px; }
  .flight-visual { border-radius: 22px; }
  .visual-topline { height: 52px; padding-inline: 14px; }
  .signal { display: none; }
  .visual-label { min-width: 99px; padding: 9px 11px; }
  .visual-label-a { top: 23%; right: 4%; }
  .visual-label-b { bottom: 18%; left: 4%; }
  .alisio-glyph { width: 64px; }
  .intro, .features, .about { padding: 84px 0; }
  .section-heading { align-items: flex-start; flex-direction: column; margin-bottom: 38px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature { min-height: 320px; padding: 26px; }
  .feature-icon { margin-bottom: 46px; }
  .feature-number { top: 28px; right: 28px; }
  .altitude-scale { right: 26px; bottom: 26px; left: 26px; }
  .about-monogram { width: 100%; }
  .cta-panel { width: calc(100% - 20px); padding: 42px 26px; border-radius: 22px; }
  .button-light { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}

@media (prefers-contrast: more) {
  .hero-lead, .hero-note, .feature-wide:first-child > p:last-of-type, .footer-links a { color: var(--paper); }
  .feature, .flight-visual { border-width: 2px; }
}