/* ================================================================
   Hyer Aviation — cockpit twilight over parchment.
   One typeface, one accent, no shadows.
   Refero style: 0e897aac-37df-4b7d-948a-0aa8ec3d2b97 (flyhyer.com)
   ================================================================ */

:root {
  /* Colors */
  --color-deep-ink: #000d10;
  --color-pure-white: #ffffff;
  --color-cool-ash: #8e8e95;
  --color-pebble: #d5d3d4;
  --color-midnight-hull: #0f0f1c;
  --color-charcoal-deck: #151623;
  --color-clay-ember: #bc7155;

  /* Typography */
  --font-display: 'Helvetica Now Display', 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;

  --text-caption: 17px;
  --text-body: 18px;
  --text-nav: 20px;
  --text-subheading: 23px;
  --text-heading-sm: 30px;
  --text-heading: 37px;
  --text-heading-lg: 52px;
  --text-display: 63px;
  --text-display-xl: 131px;
  --text-hero: 187px;

  --leading-body: 1.61;

  /* Spacing */
  --spacing-11: 11px;
  --spacing-13: 13px;
  --spacing-15: 15px;
  --spacing-16: 16px;
  --spacing-17: 17px;
  --spacing-21: 21px;
  --spacing-22: 22px;
  --spacing-23: 23px;
  --spacing-31: 31px;
  --spacing-34: 34px;
  --spacing-38: 38px;
  --spacing-52: 52px;
  --spacing-53: 53px;
  --spacing-59: 59px;
  --spacing-68: 68px;
  --spacing-119: 119px;

  /* Layout */
  --page-max-width: 1200px;
  --section-gap: 80px;

  /* Radius */
  --radius-pill: 1000px;
}

/* ---------------- Reset ---------------- */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: var(--leading-body);
  color: var(--color-deep-ink);
  background: var(--color-pure-white);
  -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; }

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-block;
  padding: 15px 22px 16px 22px;
  border-radius: var(--radius-pill);
  font-size: var(--text-caption);
  font-weight: 700;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  transition: opacity 160ms ease;
}

.btn:hover { opacity: 0.85; }

.btn--dark {
  background: var(--color-deep-ink);
  color: var(--color-pure-white);
}

.btn--sienna {
  background: var(--color-clay-ember);
  color: var(--color-pure-white);
}

.btn--ghost {
  background: transparent;
  color: var(--color-pure-white);
  border-color: var(--color-pure-white);
}

.icon-btn {
  width: 52px;
  height: 52px;
  border-radius: 100%;
  background: var(--color-deep-ink);
  border: none;
  display: grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: opacity 160ms ease;
}

.icon-btn:hover { opacity: 0.85; }

.icon-btn--ghost {
  background: transparent;
  border: 1px solid var(--color-pure-white);
}

/* ---------------- Layout ---------------- */

.container {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-22);
}

.section { padding: var(--section-gap) 0; }

.section--white { background: var(--color-pure-white); }

.section--white + .section--white { padding-top: 0; }

.section--dark { background: var(--color-midnight-hull); color: var(--color-pure-white); }

/* ---------------- Hero ---------------- */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  /* In-palette white fallback while the scene loads */
  background-color: var(--color-pure-white);
}

/* Layered scene: sky behind, jet cutout in front, animated like the
   WebGL jet on flyhyer.com. Both images share the same 1376x768 frame,
   so identical cover-positioning keeps the original composition. */
.hero__scene {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero__sky,
.hero__jet {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 70%;
}

.hero__jet { will-change: transform; }

.hero__top, .hero__foot { position: relative; z-index: 1; }

/* Nav cluster top-right, as on flyhyer.com */
.nav {
  position: absolute;
  top: var(--spacing-31);
  right: var(--spacing-38);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-38);
  z-index: 2;
}

.nav__links {
  display: flex;
  gap: var(--spacing-34);
}

.nav__link {
  font-size: var(--text-nav);
  font-weight: 400;
  color: var(--color-deep-ink);
}

.nav__link:hover { color: var(--color-cool-ash); }

/* Wordmark flush-left at display scale, headline right below the nav */
.hero__top {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-38);
  padding: var(--spacing-31) var(--spacing-38) 0;
}

.hero__wordmark {
  font-size: clamp(72px, 15vw, var(--text-hero));
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.02em;
  color: var(--color-deep-ink);
}

.hero__wordmark sup,
.footer__wordmark sup {
  font-size: 0.3em;
  vertical-align: 1.2em;
  letter-spacing: 0;
}

.hero__headline {
  font-size: clamp(37px, 5vw, var(--text-display));
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-deep-ink);
  text-align: left;
  margin-top: var(--spacing-119);
}

/* Tagline bottom-left, pill CTAs bottom-right — per Refero prompt guide */
.hero__foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--spacing-23);
  padding: 0 var(--spacing-38) var(--spacing-38);
}

.hero__tagline {
  font-size: var(--text-subheading);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--color-deep-ink);
}

.hero__ctas {
  display: flex;
  gap: var(--spacing-13);
  flex-wrap: wrap;
}

/* ---------------- Mobile menu overlay ---------------- */

.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: var(--color-midnight-hull);
  padding: var(--spacing-31) var(--spacing-38);
}

.menu-overlay[hidden] { display: none; }

.menu-overlay .icon-btn--ghost {
  position: absolute;
  top: var(--spacing-31);
  right: var(--spacing-38);
}

.menu-overlay__nav {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--spacing-13);
}

.menu-overlay__nav a {
  font-size: clamp(37px, 8vw, var(--text-heading-lg));
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1;
  color: var(--color-pure-white);
}

.menu-overlay__nav a:hover { color: var(--color-cool-ash); }

/* ---------------- Sections: headlines ---------------- */

.section__headline {
  font-size: clamp(var(--text-heading), 4.5vw, var(--text-heading-lg));
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--color-deep-ink);
  text-align: right;
  margin-bottom: var(--spacing-68);
}

.section__headline--left { text-align: left; }

/* ---------------- Feature grid ---------------- */

.container--right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: var(--section-gap);
  row-gap: var(--spacing-52);
  max-width: 900px;
}

.feature__title {
  font-size: var(--text-subheading);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1;
  color: var(--color-deep-ink);
  border-top: 1px solid var(--color-pebble);
  padding-top: var(--spacing-21);
  margin-bottom: var(--spacing-15);
}

.feature__body {
  color: var(--color-cool-ash);
}

/* ---------------- Solutions cards ---------------- */

.solutions {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--spacing-16);
  align-items: stretch;
}

.card { border-radius: 0; }

.card--clay {
  background: var(--color-clay-ember);
  color: var(--color-pure-white);
  padding: var(--spacing-53) var(--spacing-59);
  display: flex;
  flex-direction: column;
}

.card--clay .card__title {
  font-size: var(--text-heading);
  letter-spacing: -0.01em;
}

.card--clay .btn--ghost { margin-top: auto; align-self: flex-start; }

.card--white {
  background: var(--color-pure-white);
  padding: var(--spacing-53) 0 0;
  border-top: 1px solid var(--color-pebble);
}

.card__title {
  font-size: var(--text-subheading);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1;
  margin-bottom: var(--spacing-17);
}

.card__body { margin-bottom: var(--spacing-34); }

.card__body--muted { color: var(--color-cool-ash); margin-bottom: 0; }

/* ---------------- Image band ---------------- */

.section--image { padding-top: 0; }

.image-band img { width: 100%; }

/* ---------------- Dark section ---------------- */

.section--dark .container {
  display: flex;
  justify-content: flex-end;
}

.dark__column {
  max-width: 50%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-23);
}

.dark__headline {
  font-size: var(--text-heading);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--color-pure-white);
}

.dark__body { color: var(--color-pure-white); }

.dark__languages {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-13) var(--spacing-23);
  font-size: var(--text-body);
  color: var(--color-pure-white);
}

/* ---------------- Footer ---------------- */

.footer {
  background: var(--color-deep-ink);
  color: var(--color-pure-white);
  padding: var(--spacing-119) 0 var(--spacing-38);
}

.footer__wordmark {
  font-size: clamp(72px, 12vw, var(--text-display-xl));
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-68);
}

.footer__columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-38);
  margin-bottom: var(--spacing-68);
}

.footer__col { display: flex; flex-direction: column; gap: var(--spacing-13); }

.footer__col-title {
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--color-pure-white);
  margin-bottom: var(--spacing-11);
}

.footer__col a {
  font-size: var(--text-nav);
  color: var(--color-cool-ash);
}

.footer__col a:hover { color: var(--color-pure-white); }

.footer__base {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-23);
  border-top: 1px solid var(--color-pebble);
  padding-top: var(--spacing-23);
  flex-wrap: wrap;
}

.footer__social, .footer__legal {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-23);
  font-size: var(--text-nav);
  color: var(--color-cool-ash);
}

.footer__copyright { font-size: var(--text-caption); }

.footer__social a:hover, .footer__legal a:hover { color: var(--color-pure-white); }

/* ---------------- Reveal on scroll (JS-gated so content is
   visible when JavaScript is unavailable) ---------------- */

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------------- Responsive ---------------- */

@media (max-width: 900px) {
  .solutions { grid-template-columns: 1fr; }
  .card--clay { padding: var(--spacing-34) var(--spacing-31); }
  .dark__column { max-width: 100%; }
  .footer__columns { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .section { padding: var(--spacing-68) 0; }

  .nav { top: var(--spacing-21); right: var(--spacing-22); }
  .nav__links { display: none; }

  .hero__top {
    flex-direction: column;
    align-items: flex-start;
    padding: 90px var(--spacing-22) 0;
  }

  .hero__headline { margin-top: var(--spacing-38); }

  .hero__foot {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-16);
    padding: 0 var(--spacing-22) var(--spacing-31);
  }

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

  .section__headline { text-align: left; }
}