/* ASPEEN landing — dark theme matched to flyvercity.com.
   Palette, type, grid overlay and shapes mirror the parent site's dark sections. */

:root {
  /* Flyvercity brand tokens (from flyvercity-dot-com/app/globals.css) */
  --ink: #071a2c;
  --ink-2: #0b2942;
  --ink-3: #173d5c;
  --deep: #061725;      /* .stages / .research-feature base */
  --footer: #041321;
  --paper: #f4f1e9;
  --white: #fffdf8;
  --orange: #f09a39;
  --orange-soft: #ffd39d;
  --blue: #69a7ce;
  --green: #66c796;
  --muted: #536976;
  --line-light: rgba(255, 255, 255, .17);
  --line-faint: rgba(255, 255, 255, .035);

  /* dark-theme semantic text colors */
  --text: var(--white);
  --text-lede: #d5e0e7;
  --text-muted: #aebfc9;
  --text-dim: #8fa5b1;
  --eyebrow: #b9c8d4;

  --maxw: 1200px;
  --pad: clamp(1.1rem, 0.6rem + 2.5vw, 2.5rem);

  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
  --step-1: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  --h2: clamp(2.3rem, 1.5rem + 3.3vw, 4rem);
  --h1: clamp(2.8rem, 1.6rem + 5vw, 5.4rem);

  --font: "Inter", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--text);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1; letter-spacing: -0.05em; margin: 0 0 0.5em; font-weight: 500; }
p { margin: 0 0 1rem; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -3rem;
  z-index: 100;
  background: var(--orange);
  color: var(--ink);
  padding: 0.6rem 1rem;
  font-weight: 800;
  transition: top 0.18s ease;
}
.skip-link:focus { top: 0.5rem; }

:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--ink) 80%, transparent);
  border-bottom: 1px solid var(--line-light);
}
.nav {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 0 var(--pad);
  height: 78px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--white);
}
.brand__name { font-size: 1.05rem; }
.brand__mark { width: 34px; height: 34px; border-radius: 8px; display: block; }
.nav__links {
  display: flex;
  justify-content: center;
  gap: clamp(1rem, 2.2vw, 1.9rem);
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
}
.nav__links a { color: var(--text-muted); }
.nav__links a:hover { color: var(--orange-soft); }
.nav__agents {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.35em 0.7em;
  border: 1px solid var(--line-light);
  color: var(--orange-soft) !important;
  letter-spacing: 0.04em;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.nav__agents::before { content: "›_"; color: var(--orange); font-weight: 700; }
.nav__agents:hover { border-color: var(--orange); background: rgba(240, 154, 57, 0.08); }

/* Flyvercity company logo, top-right, links to main site */
.brand-fvc {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  opacity: 0.92;
  transition: opacity 0.2s ease;
}
.brand-fvc:hover { opacity: 1; }
.brand-fvc img { width: 150px; height: auto; display: block; }

@media (max-width: 820px) {
  .nav { grid-template-columns: auto auto; }
  .nav__links { display: none; }
}

/* ---------- Buttons (squared, flyvercity style) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 52px;
  padding: 0 1.5rem;
  border: 1px solid transparent;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.035em;
  text-transform: uppercase;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--orange); color: var(--ink); }
.btn--primary:hover { background: var(--orange-soft); }
.btn--ghost { color: var(--white); border-color: var(--line-light); }
.btn--ghost:hover { border-color: var(--orange); color: var(--orange-soft); }
.btn--lg { min-height: 58px; padding: 0 1.9rem; font-size: 0.8rem; }

/* ---------- Grid-overlay helper for dark hero/band ---------- */
.gridded { position: relative; overflow: hidden; }
.gridded::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, transparent 2%, #000 74%, transparent);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 16%, rgba(58, 112, 152, .3), transparent 29%),
    linear-gradient(130deg, var(--ink) 0%, var(--ink-2) 62%, var(--ink) 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, transparent 2%, #000 74%, transparent);
}
.hero__inner {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(3.5rem, 2rem + 9vw, 7.5rem) var(--pad) clamp(3rem, 2rem + 5vw, 6rem);
  animation: rise 0.65s ease both;
}
@keyframes rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

.eyebrow {
  margin: 0 0 1.6rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--eyebrow);
  font-family: var(--mono);
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--orange); }
.eyebrow--light { color: var(--orange); }
.eyebrow--light::before { background: currentColor; }

.hero__title {
  font-size: var(--h1);
  line-height: 0.96;
  letter-spacing: -0.056em;
  max-width: 16ch;
  color: var(--white);
}
.hero__lede { max-width: 42rem; margin-top: 2rem; color: var(--text-lede); font-size: var(--step-1); line-height: 1.58; }
.hero__lede strong { color: var(--white); font-weight: 600; }
.hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.2rem; margin-top: 2.5rem; }
.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 2.2rem 0 0;
}
.hero__chips li {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  border: 1px solid var(--line-light);
  padding: 0.45rem 0.85rem;
}
.hero__glow { display: none; }

/* ---------- Sections ---------- */
.section {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(3.5rem, 2.5rem + 5vw, 7rem) var(--pad);
}
.section__head { max-width: 46rem; margin-bottom: 3rem; }
.section__head h2 { font-size: var(--h2); color: var(--white); }
.section__head p { color: var(--text-muted); font-size: var(--step-1); }
code {
  font-family: var(--mono);
  background: rgba(255, 255, 255, 0.07);
  padding: 0.1em 0.4em;
  font-size: 0.9em;
  color: var(--orange-soft);
}
/* emphasis chip — solid brand orange, for standout terms like "real-time" */
code.hl {
  background: var(--orange);
  color: var(--ink);
  font-weight: 700;
}

/* Cards grid */
.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
  grid-template-columns: repeat(2, 1fr);
}
@media (max-width: 680px) {
  .cards { grid-template-columns: 1fr; }
}
.card {
  background: var(--ink);
  padding: 1.8rem 1.6rem;
  position: relative;
}
.card::before {
  content: "";
  position: absolute;
  top: -1px; left: -1px;
  width: 60px; height: 2px;
  background: linear-gradient(90deg, var(--orange), transparent);
}
.card h3 { font-size: 1.2rem; font-weight: 600; letter-spacing: -0.02em; color: var(--white); margin-bottom: 0.6rem; }
.card p { color: var(--text-muted); margin: 0; font-size: 0.95rem; }

/* Demo video */
.section--demo { }
.demo { margin: 0; }
.demo__video {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  display: block;
  background: #000;
  border: 1px solid var(--line-light);
}
.demo figcaption {
  margin-top: 1rem;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

/* Accent thesis band — orange, like .final-cta */
.section--accent {
  background: var(--orange);
  color: var(--ink);
}
.thesis {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(3.5rem, 2.5rem + 5vw, 7rem) var(--pad);
}
.thesis .eyebrow--light { color: var(--ink); }
.thesis h2 { font-size: var(--h2); font-weight: 500; letter-spacing: -0.055em; color: var(--ink); }
.thesis__body { max-width: 47rem; font-size: var(--step-1); color: #06352b; }
.compare {
  display: grid;
  gap: 1px;
  background: rgba(7, 26, 44, 0.22);
  border: 1px solid rgba(7, 26, 44, 0.22);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  margin-top: 2.2rem;
}
.compare__col { background: var(--orange); padding: 1.5rem 1.6rem; }
.compare__col h3 { font-size: 1rem; font-weight: 800; letter-spacing: 0.02em; text-transform: uppercase; color: var(--ink); }
.compare__col ul { margin: 0.8rem 0 0; padding-left: 1.1rem; color: #0c3429; }
.compare__col li { margin: 0.4rem 0; }
.compare__col--old { opacity: 0.72; }

/* Loop — dark bordered grid like .stage-grid */
.loop {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: pole;
  display: grid;
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 900px) { .loop { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .loop { grid-template-columns: 1fr; } }
.loop__pole {
  position: relative;
  background: var(--deep);
  padding: 1.8rem 1.6rem 2rem;
  counter-increment: pole;
  min-height: 190px;
}
.loop__pole::before {
  content: counter(pole, decimal-leading-zero);
  position: absolute;
  top: 1.2rem;
  right: 1.3rem;
  font-family: var(--mono);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.14);
  font-size: 1.3rem;
}
.loop__pole--out { background: #0a2238; }
.loop__pole--out::after {
  content: "";
  position: absolute;
  top: -1px; left: -1px;
  width: 60px; height: 2px;
  background: linear-gradient(90deg, var(--orange), transparent);
}
.loop__tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--orange);
  font-weight: 800;
  margin-bottom: 0.7rem;
}
.loop__pole h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -0.02em; color: var(--white); margin-bottom: 0.5rem; }
.loop__pole p { color: var(--text-dim); margin: 0; font-size: 0.95rem; }

/* Split markets */
.section--split { padding-block: clamp(3.5rem, 2.5rem + 5vw, 7rem); }
.split {
  display: grid;
  gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  grid-template-columns: 1.1fr 0.9fr;
  align-items: start;
}
@media (max-width: 820px) { .split { grid-template-columns: 1fr; } }
.split h2 { font-size: var(--h2); color: var(--white); }
.split__lede { color: var(--text-muted); font-size: var(--step-1); }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0; margin: 1.4rem 0 0; }
.tags li {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  border: 1px solid var(--line-light);
  padding: 0.4rem 0.8rem;
  color: var(--text-muted);
}
.markets { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--line-light); }
.markets li {
  border-bottom: 1px solid var(--line-light);
  border-left: 2px solid var(--orange);
  padding: 1.1rem 1.2rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}
.markets li:nth-child(2) { border-left-color: var(--green); }
.markets li:nth-child(3) { border-left-color: var(--blue); }
.markets li:nth-child(4) { border-left-color: var(--orange-soft); }
.markets span { display: block; color: var(--white); font-weight: 600; letter-spacing: -0.01em; margin-bottom: 0.2rem; }

/* Specs */
.specs {
  display: grid;
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
  grid-template-columns: repeat(2, 1fr);
  margin: 0;
}
@media (max-width: 680px) { .specs { grid-template-columns: 1fr; } }
.specs div { background: var(--ink); padding: 1.6rem 1.6rem; }
.specs dt { color: var(--orange); font-family: var(--mono); font-weight: 800; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 0.6rem; }
.specs dd { margin: 0; color: var(--text-muted); font-size: 0.95rem; }

/* CTA — orange final band */
.section--cta { max-width: none; background: var(--orange); color: var(--ink); }
.cta {
  max-width: var(--maxw);
  margin-inline: auto;
  text-align: center;
  padding: clamp(3.5rem, 2.5rem + 5vw, 6.5rem) var(--pad);
}
.cta h2 { font-size: var(--h2); font-weight: 500; letter-spacing: -0.055em; color: var(--ink); }
.cta p { color: #0c3429; font-size: var(--step-1); max-width: 38rem; margin-inline: auto; }
.cta .btn { margin-top: 1.6rem; }
.cta .btn--primary { background: var(--ink); color: var(--white); }
.cta .btn--primary:hover { background: var(--ink-3); }

/* Footer */
.site-footer { background: var(--footer); color: #b3c2cb; border-top: 1px solid var(--line-light); }
.site-footer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 3rem var(--pad) 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2rem;
  align-items: center;
}
.site-footer__brand { display: inline-flex; align-items: center; opacity: 0.9; }
.site-footer__brand img { width: 160px; height: auto; display: block; }
.site-footer__meta { color: #728997; font-size: 0.8rem; margin: 0; letter-spacing: 0.02em; }
.site-footer__meta:last-child { margin-inline-start: auto; }
.site-footer__meta a { color: #9fb3be; }
.site-footer__meta a:hover { color: var(--orange-soft); }