/* ============================================================
   FlyHard — Site styles
   ============================================================ */

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--fh-font-body);
  font-size: var(--fh-t-body);
  line-height: var(--fh-lh-body);
  color: var(--fh-fg-on-bone);
  background: var(--fh-bone);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

::selection { background: var(--fh-aqua); color: var(--fh-ink); }

.container { max-width: 1280px; margin: 0 auto; padding: 0 var(--fh-s-6); }

/* ============================================================
   Typography roles
   ============================================================ */

.display {
  font-family: var(--fh-font-display);
  letter-spacing: var(--fh-track-tight);
  line-height: var(--fh-lh-tight);
  text-wrap: balance;
}

.mono {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
  color: var(--fh-aqua);
}

.mono-muted {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
  color: var(--fh-fg-on-bone-3);
}

.lead { font-size: var(--fh-t-lead); line-height: var(--fh-lh-body); max-width: 58ch; }

/* ============================================================
   Nav
   ============================================================ */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  padding: var(--fh-s-5) var(--fh-s-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--fh-t-med) var(--fh-ease),
              border-color var(--fh-t-med) var(--fh-ease),
              padding var(--fh-t-med) var(--fh-ease);
  border-bottom: 1px solid transparent;
}

.nav.is-scrolled {
  background: rgba(15, 27, 30, 0.82);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  border-bottom-color: var(--fh-ink-4);
  padding-top: var(--fh-s-4);
  padding-bottom: var(--fh-s-4);
}

.nav__logo {
  height: 24px;
  width: auto;
  display: block;
}

.nav__logo img { height: 100%; width: auto; }

.nav__links {
  display: flex;
  gap: var(--fh-s-7);
  list-style: none;
  align-items: center;
}

.nav__links a {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
  color: var(--fh-fg-on-ink-2);
  transition: color var(--fh-t-fast) var(--fh-ease);
  position: relative;
  padding: var(--fh-s-2) 0;
}

.nav__links a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--fh-aqua);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--fh-t-med) var(--fh-ease);
}

.nav__links a:hover { color: var(--fh-fg-on-ink); }
.nav__links a:hover::after { transform: scaleX(1); }

.nav__burger {
  display: none;
  background: none;
  border: 1px solid var(--fh-ink-4);
  color: var(--fh-fg-on-ink);
  padding: var(--fh-s-2) var(--fh-s-3);
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  cursor: pointer;
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: var(--fh-fg-on-ink);
  background: var(--fh-ink);
}

.hero__media {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero__img {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.12);
  animation: kenburns 48s var(--fh-ease) infinite alternate;
  will-change: transform;
}

@keyframes kenburns {
  0%   { transform: scale(1.12) translate3d(0, 0, 0); }
  100% { transform: scale(1.22) translate3d(-2%, -1%, 0); }
}

.hero__veil {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(15,27,30,0.2) 0%, rgba(15,27,30,0.7) 60%, rgba(15,27,30,0.95) 100%),
    linear-gradient(to bottom, rgba(15,27,30,0.3), rgba(15,27,30,0.85));
}

.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(244,241,235,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(244,241,235,0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--fh-s-10) var(--fh-s-6) var(--fh-s-8);
  max-width: 1280px;
  margin: 0 auto;
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: var(--fh-s-4);
  margin-bottom: var(--fh-s-5);
  color: var(--fh-aqua);
}

.hero__meta-rule {
  width: 48px;
  height: 1px;
  background: var(--fh-aqua);
}

.hero__title {
  font-family: var(--fh-font-display);
  font-weight: 600;
  font-size: var(--fh-t-hero);
  line-height: 0.88;
  letter-spacing: -0.04em;
  margin-bottom: var(--fh-s-5);
}

.hero__title-line {
  display: block;
  overflow: hidden;
}

.hero__title-word {
  display: inline-block;
  transform: translateY(110%);
  animation: riseIn 900ms var(--fh-ease) 200ms forwards;
}

.hero__title-line:nth-child(2) .hero__title-word {
  animation-delay: 360ms;
  color: var(--fh-fg-on-ink-2);
  font-weight: 400;
}

@keyframes riseIn {
  to { transform: translateY(0); }
}

.hero__tagline {
  font-family: var(--fh-font-body);
  font-size: var(--fh-t-lead);
  color: var(--fh-fg-on-ink-2);
  max-width: 52ch;
  margin-bottom: var(--fh-s-8);
  opacity: 0;
  animation: fadeIn 700ms var(--fh-ease) 700ms forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--fh-ink-4);
  padding-top: var(--fh-s-6);
  max-width: 780px;
  opacity: 0;
  animation: fadeIn 700ms var(--fh-ease) 900ms forwards;
}

.hero__stat {
  padding-right: var(--fh-s-5);
  position: relative;
}

.hero__stat + .hero__stat {
  padding-left: var(--fh-s-5);
  border-left: 1px solid var(--fh-ink-4);
}

.hero__stat-value {
  font-family: var(--fh-font-display);
  font-weight: 500;
  font-size: clamp(32px, 4vw, 52px);
  color: var(--fh-aqua);
  letter-spacing: var(--fh-track-tight);
  line-height: 1;
  margin-bottom: var(--fh-s-2);
}

.hero__stat-label {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
  color: var(--fh-fg-on-ink-3);
}

.hero__scroll {
  position: absolute;
  right: var(--fh-s-6);
  bottom: var(--fh-s-5);
  display: flex;
  align-items: center;
  gap: var(--fh-s-3);
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
  color: var(--fh-fg-on-ink-3);
  z-index: 2;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: var(--fh-aqua);
  animation: scrollLine 2.4s var(--fh-ease) infinite;
  transform-origin: top;
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); opacity: 0; }
  40%  { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1) translateY(40px); opacity: 0; }
}

/* ============================================================
   Reveal — IntersectionObserver targets
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms var(--fh-ease), transform 600ms var(--fh-ease);
  transition-delay: calc(var(--i, 0) * 80ms);
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__img { animation: none; transform: none; }
  .hero__title-word { animation: none; transform: none; }
  .hero__tagline, .hero__stats { animation: none; opacity: 1; }
  .hero__scroll-line { animation: none; }
}

/* ============================================================
   Section base
   ============================================================ */

.section {
  padding: var(--fh-s-10) 0;
  position: relative;
}

.section--ink {
  background: var(--fh-ink);
  color: var(--fh-fg-on-ink);
}

.section__head {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--fh-s-6);
  margin-bottom: var(--fh-s-9);
  align-items: start;
}

.section__id {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
  color: var(--fh-aqua);
  padding-top: var(--fh-s-3);
  border-top: 1px solid var(--fh-aqua);
  max-width: 140px;
}

.section__title {
  font-family: var(--fh-font-display);
  font-weight: 500;
  font-size: var(--fh-t-h1);
  letter-spacing: var(--fh-track-tight);
  line-height: var(--fh-lh-tight);
  max-width: 20ch;
}

.section__title em {
  font-style: normal;
  color: var(--fh-aqua);
}

/* ============================================================
   About — asymmetric manifesto + capability list
   ============================================================ */

.about {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--fh-s-9);
  align-items: start;
}

.about__copy p + p { margin-top: var(--fh-s-5); }

.about__copy p {
  font-size: var(--fh-t-lead);
  line-height: var(--fh-lh-body);
  color: var(--fh-fg-on-bone-2);
  max-width: 54ch;
}

.about__copy p strong { color: var(--fh-fg-on-bone); font-weight: 500; }

.capabilities {
  list-style: none;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--fh-bone-3);
}

.capability {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: var(--fh-s-5);
  padding: var(--fh-s-5) 0;
  border-bottom: 1px solid var(--fh-bone-3);
  align-items: baseline;
  transition: padding-left var(--fh-t-med) var(--fh-ease),
              background var(--fh-t-med) var(--fh-ease);
}

.capability:hover {
  padding-left: var(--fh-s-4);
  background: var(--fh-aqua-dim);
}

.capability__num {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  color: var(--fh-aqua);
}

.capability__body h3 {
  font-family: var(--fh-font-display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0;
  margin-bottom: var(--fh-s-1);
}

.capability__body p {
  font-size: var(--fh-t-small);
  color: var(--fh-fg-on-bone-2);
  max-width: 44ch;
}

/* ============================================================
   Specs — engineering datasheet
   ============================================================ */

.specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--fh-ink-4);
}

.specs__group {
  border-bottom: 1px solid var(--fh-ink-4);
  padding: var(--fh-s-6) 0;
}

.specs__group:nth-child(odd) { padding-right: var(--fh-s-7); border-right: 1px solid var(--fh-ink-4); padding-left: var(--fh-s-5); }
.specs__group:nth-child(even) { padding-left: var(--fh-s-7); padding-right: var(--fh-s-5); }

.specs__group-title {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
  color: var(--fh-aqua);
  margin-bottom: var(--fh-s-5);
}

.specs__row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--fh-s-4);
  padding: var(--fh-s-3) 0;
  border-bottom: 1px dashed var(--fh-ink-4);
  align-items: baseline;
}

.specs__row:last-child { border-bottom: none; }

.specs__label {
  font-family: var(--fh-font-body);
  font-size: var(--fh-t-body);
  color: var(--fh-fg-on-ink-2);
}

.specs__value {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono);
  color: var(--fh-fg-on-ink);
  font-feature-settings: "tnum";
}

.specs__note {
  padding: var(--fh-s-5) var(--fh-s-5) 0;
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  color: var(--fh-fg-on-ink-3);
  grid-column: 1 / -1;
  border-top: 1px solid var(--fh-ink-4);
  margin-top: -1px;
}

/* ============================================================
   Features — alternating photo + text
   ============================================================ */

.features {
  display: flex;
  flex-direction: column;
  gap: var(--fh-s-10);
}

.feature {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: var(--fh-s-9);
  align-items: center;
}

.feature:nth-child(even) {
  grid-template-columns: 1fr 1.05fr;
}

.feature:nth-child(even) .feature__media { order: 2; }

.feature__media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--fh-ink-2);
}

.feature__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform var(--fh-t-slow) var(--fh-ease);
}

.feature:hover .feature__media img { transform: scale(1.08); }

.feature__media::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(244,241,235,0.12);
  pointer-events: none;
}

.feature__id {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
  color: var(--fh-aqua);
  margin-bottom: var(--fh-s-4);
  display: inline-block;
  padding-bottom: var(--fh-s-2);
  border-bottom: 1px solid var(--fh-aqua);
}

.feature__title {
  font-family: var(--fh-font-display);
  font-weight: 500;
  font-size: var(--fh-t-h2);
  letter-spacing: var(--fh-track-tight);
  line-height: var(--fh-lh-snug);
  margin-bottom: var(--fh-s-5);
  max-width: 20ch;
}

.feature__body {
  font-size: var(--fh-t-lead);
  color: var(--fh-fg-on-bone-2);
  line-height: var(--fh-lh-body);
  max-width: 54ch;
}

/* ============================================================
   Gallery
   ============================================================ */

.gallery {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 160px;
  gap: var(--fh-s-3);
}

.gallery__item {
  position: relative;
  overflow: hidden;
  background: var(--fh-ink-2);
}

.gallery__item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--fh-t-slow) var(--fh-ease), filter var(--fh-t-slow) var(--fh-ease);
  filter: grayscale(0.15);
}

.gallery__item:hover img {
  transform: scale(1.06);
  filter: grayscale(0);
}

.gallery__item:nth-child(1) { grid-column: span 7; grid-row: span 3; }
.gallery__item:nth-child(2) { grid-column: span 5; grid-row: span 2; }
.gallery__item:nth-child(3) { grid-column: span 5; grid-row: span 1; }
.gallery__item:nth-child(4) { grid-column: span 6; grid-row: span 2; }
.gallery__item:nth-child(5) { grid-column: span 6; grid-row: span 2; }

/* ============================================================
   Contact
   ============================================================ */

.contact {
  padding: var(--fh-s-10) 0;
  background: var(--fh-ink);
  color: var(--fh-fg-on-ink);
  position: relative;
}

.contact__inner {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--fh-s-6);
  align-items: start;
}

.contact__body h2 {
  font-family: var(--fh-font-display);
  font-weight: 500;
  font-size: var(--fh-t-h1);
  letter-spacing: var(--fh-track-tight);
  margin-bottom: var(--fh-s-6);
  max-width: 16ch;
}

.contact__email {
  display: inline-flex;
  align-items: center;
  gap: var(--fh-s-4);
  font-family: var(--fh-font-display);
  font-weight: 400;
  font-size: clamp(28px, 3vw, 44px);
  color: var(--fh-aqua);
  letter-spacing: var(--fh-track-tight);
  transition: color var(--fh-t-fast) var(--fh-ease), gap var(--fh-t-med) var(--fh-ease);
  margin-bottom: var(--fh-s-7);
}

.contact__email:hover { color: var(--fh-aqua-hi); gap: var(--fh-s-6); }

.contact__email-arrow {
  transition: transform var(--fh-t-med) var(--fh-ease);
}

.contact__email:hover .contact__email-arrow { transform: translateX(8px); }

.contact__meta {
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono);
  color: var(--fh-fg-on-ink-2);
  line-height: var(--fh-lh-body);
}

.contact__meta-row { display: grid; grid-template-columns: 120px 1fr; gap: var(--fh-s-4); padding: var(--fh-s-2) 0; }
.contact__meta-row dt { color: var(--fh-fg-on-ink-3); letter-spacing: var(--fh-track-wide); text-transform: uppercase; font-size: var(--fh-t-mono-sm); }

/* ============================================================
   Footer
   ============================================================ */

.footer {
  padding: var(--fh-s-6) 0;
  background: var(--fh-ink);
  color: var(--fh-fg-on-ink-3);
  border-top: 1px solid var(--fh-ink-4);
  font-family: var(--fh-font-mono);
  font-size: var(--fh-t-mono-sm);
  letter-spacing: var(--fh-track-wide);
  text-transform: uppercase;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--fh-s-4);
}

/* ============================================================
   Focus
   ============================================================ */

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--fh-aqua);
  outline-offset: 3px;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 960px) {
  .about { grid-template-columns: 1fr; gap: var(--fh-s-7); }
  .section__head { grid-template-columns: 1fr; gap: var(--fh-s-3); margin-bottom: var(--fh-s-7); }
  .feature { grid-template-columns: 1fr !important; gap: var(--fh-s-5); }
  .feature:nth-child(even) .feature__media { order: 0; }
  .specs { grid-template-columns: 1fr; }
  .specs__group { padding: var(--fh-s-5) !important; border-right: none !important; }
  .contact__inner { grid-template-columns: 1fr; }
  .gallery { grid-auto-rows: 120px; }
  .gallery__item { grid-column: span 12 !important; grid-row: span 2 !important; }
}

@media (max-width: 640px) {
  .nav { padding: var(--fh-s-4); }
  .nav__links { display: none; }
  .nav__links.is-open {
    display: flex;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    gap: var(--fh-s-4);
    padding: var(--fh-s-5);
    background: var(--fh-ink);
    border-top: 1px solid var(--fh-ink-4);
  }
  .nav__burger { display: block; }
  .hero__content { padding: var(--fh-s-8) var(--fh-s-4) var(--fh-s-7); }
  .hero__stats { grid-template-columns: 1fr; gap: var(--fh-s-4); padding-top: var(--fh-s-4); }
  .hero__stat + .hero__stat { padding-left: 0; border-left: none; border-top: 1px solid var(--fh-ink-4); padding-top: var(--fh-s-4); }
  .hero__scroll { display: none; }
  .container { padding: 0 var(--fh-s-4); }
  .section { padding: var(--fh-s-8) 0; }
  .section__title { font-size: clamp(32px, 9vw, 48px); }
}