/* GREEN AIR ENGINEERING — near-black green, cool mint accent, visible-air motif. */
:root {
  --bg: #070B09;
  --panel: #0E1411;
  --ink: #EAEFE9;
  --accent: #4ED99B;
  --display: "Space Grotesk", "Helvetica Neue", sans-serif;
  --sans: "Archivo", "Helvetica Neue", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-weight: 300;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.overline { font-size: 0.62rem; letter-spacing: 0.45em; text-transform: uppercase; color: var(--accent); }
.display { font-family: var(--display); font-weight: 600; font-size: clamp(3.2rem, 11vw, 9.5rem); line-height: 0.95; letter-spacing: 0.02em; text-transform: uppercase; }
.section-title { font-family: var(--display); font-weight: 600; font-size: clamp(1.9rem, 4.5vw, 3.4rem); line-height: 1.05; text-transform: uppercase; letter-spacing: 0.02em; }
.fine { display: block; font-size: 0.66rem; letter-spacing: 0.18em; opacity: 0.45; margin-top: 2.5rem; text-align: center; }

/* nav */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; justify-content: space-between; align-items: center;
  padding: 1.4rem 4vw; transition: background 0.4s ease, padding 0.4s ease;
}
#nav.scrolled { background: rgba(7,11,9,0.9); backdrop-filter: blur(12px); padding: 0.9rem 4vw; }
.logo { font-family: var(--display); font-weight: 600; font-size: 0.95rem; letter-spacing: 0.28em; }
.logo em { font-style: normal; color: var(--accent); }
.nav-links { display: flex; gap: 2.2rem; align-items: center; }
.nav-links a { font-size: 0.66rem; letter-spacing: 0.28em; text-transform: uppercase; opacity: 0.75; }
.nav-links a:hover { opacity: 1; }
.nav-cta { border: 1px solid var(--accent); color: var(--accent) !important; padding: 0.55rem 1.1rem; opacity: 1 !important; }
@media (max-width: 767px) { .nav-links a:not(.nav-cta) { display: none; } }

/* loader */
body.locked { overflow: hidden; height: 100vh; }
#loader {
  position: fixed; inset: 0; z-index: 100; background: var(--bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.3rem;
  transition: opacity 0.9s ease 0.15s, visibility 0.9s;
}
#loader.done { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-mark { font-family: var(--display); font-weight: 600; font-size: 0.95rem; letter-spacing: 0.5em; opacity: 0.85; }
#loader-track { width: min(38vw, 300px); height: 1px; background: rgba(234,239,233,0.14); }
#loader-bar { width: 100%; height: 100%; background: var(--accent); transform: scaleX(0); transform-origin: left center; transition: transform 0.2s ease; }
#loader-pct { font-size: 0.62rem; letter-spacing: 0.35em; color: var(--accent); }

/* scrub chapters */
.chapter { position: relative; }
.chapter .pin { position: sticky; top: 0; height: 100vh; overflow: hidden; }
.chapter canvas, .fallback-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.chapter .overlay { position: absolute; inset: 0; z-index: 2; pointer-events: none; }
.no-scrub .chapter { height: 100vh !important; }
.no-scrub .callout { position: static; margin: 1rem 6vw; }

.callout { position: absolute; max-width: 250px; opacity: 0; transform: translateY(12px); transition: opacity 0.8s ease, transform 0.8s ease; }
.callout.visible { opacity: 1; transform: none; }
.callout .line { display: block; width: 56px; height: 1px; background: var(--accent); margin-bottom: 0.7rem; opacity: 0.8; }
.callout strong { display: block; font-family: var(--display); font-weight: 600; font-size: 1.05rem; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 0.25rem; text-shadow: 0 1px 18px rgba(0,0,0,0.55); }
.callout span { font-size: 0.62rem; letter-spacing: 0.22em; text-transform: uppercase; opacity: 0.75; text-shadow: 0 1px 14px rgba(0,0,0,0.55); }

.chapter-line {
  position: absolute; inset: 0; display: flex; align-items: flex-end; justify-content: center;
  padding: 0 8vw 14vh; text-align: center;
  font-family: var(--display); font-weight: 600; font-size: clamp(1.4rem, 3.4vw, 2.6rem);
  text-transform: uppercase; letter-spacing: 0.04em;
  text-shadow: 0 2px 24px rgba(0,0,0,0.6);
  opacity: 0; transform: translateY(16px); transition: opacity 1s ease, transform 1s ease;
}
.chapter-line.visible { opacity: 1; transform: none; }

/* hero overlay */
.hero-scrim { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7,11,9,0.55) 0%, rgba(7,11,9,0.12) 40%, rgba(7,11,9,0.78) 100%); }
.hero-copy { position: absolute; inset: 0; z-index: 2; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 0 6vw; }
body.ready .hero-copy .display { animation: heroIn 2s cubic-bezier(.16,1,.3,1) both 0.2s; }
body.ready .hero-copy .overline, body.ready .hero-sub { animation: fadeIn 2s ease both 1s; }
.hero-copy .overline { display: block; margin-bottom: 1.2rem; opacity: 0; }
.hero-copy .display { opacity: 0; }
.hero-sub { font-size: 0.85rem; letter-spacing: 0.12em; line-height: 2; opacity: 0; margin: 1.6rem 0 0; text-shadow: 0 1px 16px rgba(0,0,0,0.5); }
body.ready .hero-copy .overline { opacity: 1; }
body.ready .hero-copy .display { opacity: 1; }
body.ready .hero-sub { opacity: 0.85; }
@keyframes heroIn { from { opacity: 0; letter-spacing: 0.2em; } to { opacity: 1; letter-spacing: 0.02em; } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.scroll-cue { position: absolute; bottom: 2.6rem; left: 50%; transform: translateX(-50%); z-index: 2; font-size: 0.6rem; letter-spacing: 0.4em; text-transform: uppercase; opacity: 0.5; }

.btn {
  display: inline-block; background: var(--accent); color: #070B09; font-weight: 500;
  font-size: 0.66rem; letter-spacing: 0.3em; text-transform: uppercase;
  padding: 1rem 2.2rem; transition: filter 0.3s;
}
.btn:hover { filter: brightness(1.12); }
.btn.ghost { background: none; border: 1px solid var(--accent); color: var(--accent); }

/* ticker */
.ticker { overflow: hidden; border-top: 1px solid rgba(234,239,233,0.08); border-bottom: 1px solid rgba(234,239,233,0.08); padding: 1.1rem 0; }
.ticker-track { display: flex; white-space: nowrap; animation: tick 38s linear infinite; }
.ticker-track span { font-family: var(--display); font-weight: 500; font-size: 0.9rem; letter-spacing: 0.32em; text-transform: uppercase; opacity: 0.5; }
@keyframes tick { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* sections */
.section { padding: 15vh 6vw; max-width: 1400px; margin: 0 auto; }
.section-head { text-align: center; margin-bottom: 4.5rem; }
.section-head .overline { display: block; margin-bottom: 1rem; }
.section-intro { max-width: 640px; margin: 1.4rem auto 0; font-size: 0.85rem; line-height: 2; opacity: 0.6; }

/* services grid */
.services-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 3rem 2.2rem; }
.service-media { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--panel); }
.service-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
.service:hover .service-media img { transform: scale(1.05); }
.service h3 { font-family: var(--display); font-weight: 600; font-size: 1.15rem; letter-spacing: 0.06em; text-transform: uppercase; margin: 1.2rem 0 0.5rem; }
.service p { font-size: 0.78rem; line-height: 1.9; opacity: 0.6; margin-bottom: 0.8rem; }
.service-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.service-tags span { font-size: 0.58rem; letter-spacing: 0.16em; text-transform: uppercase; opacity: 0.5; border: 1px solid rgba(234,239,233,0.14); padding: 0.3rem 0.6rem; }

/* stats strip */
.stats { padding-top: 4vh; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; border-top: 1px solid rgba(234,239,233,0.1); padding-top: 3.5rem; }
.stat strong { display: block; font-family: var(--display); font-weight: 600; font-size: 1.6rem; color: var(--accent); margin-bottom: 0.6rem; letter-spacing: 0.04em; }
.stat span { font-size: 0.7rem; line-height: 1.8; opacity: 0.55; }
@media (max-width: 767px) { .stats-grid { grid-template-columns: 1fr 1fr; } }

/* why-us checklist */
.why-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.1rem 2.5rem; max-width: 1100px; margin: 0 auto; }
.why-list li { list-style: none; font-size: 0.78rem; letter-spacing: 0.08em; line-height: 1.7; opacity: 0.75; padding-left: 1.6rem; position: relative; }
.why-list li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 600; }

/* industries chips */
.chips { display: flex; flex-wrap: wrap; gap: 0.7rem; justify-content: center; max-width: 900px; margin: 0 auto; }
.chips span { font-size: 0.64rem; letter-spacing: 0.22em; text-transform: uppercase; opacity: 0.65; border: 1px solid rgba(234,239,233,0.16); padding: 0.65rem 1.2rem; transition: border-color 0.3s, color 0.3s; }
.chips span:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }

/* brands row */
.brands { text-align: center; }
.brand-row { display: flex; flex-wrap: wrap; gap: 1.4rem 3rem; justify-content: center; align-items: baseline; max-width: 1000px; margin: 0 auto; }
.brand-row span { font-family: var(--display); font-weight: 500; font-size: 1rem; letter-spacing: 0.18em; text-transform: uppercase; opacity: 0.4; transition: opacity 0.3s; }
.brand-row span:hover { opacity: 0.9; }

/* film band — real-time ambient loop */
.filmband { position: relative; height: 78vh; overflow: hidden; }
.filmband video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.filmband-overlay {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: flex-start; justify-content: flex-end; gap: 1rem;
  padding: 0 6vw 9vh;
  background: linear-gradient(180deg, rgba(7,11,9,0.35) 0%, rgba(7,11,9,0.05) 45%, rgba(7,11,9,0.72) 100%);
}
.filmband-overlay .section-title { text-shadow: 0 2px 24px rgba(0,0,0,0.6); }
@media (max-width: 767px) { .filmband { height: 60vh; } }

/* gallery */
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.4rem; }
.gal { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--panel); }
.gal img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s ease; }
.gal:hover img { transform: scale(1.06); }
.gal figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 2.2rem 1.2rem 1rem; font-size: 0.6rem; letter-spacing: 0.3em; text-transform: uppercase; background: linear-gradient(180deg, transparent, rgba(7,11,9,0.85)); }

/* contact */
.cta { text-align: center; }
.contact-actions { display: flex; gap: 1.2rem; justify-content: center; flex-wrap: wrap; margin-bottom: 3.5rem; }
.cta form { max-width: 680px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 0; border-bottom: 1px solid rgba(234,239,233,0.3); }
.cta input { flex: 1 1 160px; background: none; border: 0; outline: 0; color: var(--ink); font-family: var(--sans); font-size: 0.85rem; letter-spacing: 0.06em; padding: 1rem 0.4rem; }
.cta input::placeholder { color: rgba(234,239,233,0.35); }
.cta button { background: none; border: 0; color: var(--accent); cursor: pointer; font-size: 0.62rem; letter-spacing: 0.3em; text-transform: uppercase; padding: 0 0.6rem; }

footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; padding: 3rem 6vw 4rem; }
footer span { font-size: 0.58rem; letter-spacing: 0.3em; text-transform: uppercase; opacity: 0.35; }

/* reveals */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 1.1s ease, transform 1.1s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .ticker-track { animation: none; }
}