/* ===== Air Turbine Aviation — Site ===== */

:root{
  --navy-950: #071b2c;
  --navy-900: #0a2540;
  --navy-800: #0f3a5f;
  --navy-700: #14487a;
  --sky-600: #0f7fc0;
  --sky-500: #1ba1e2;
  --sky-400: #4db8ea;
  --sky-150: #d9edf9;
  --sky-100: #eaf5fc;
  --sky-50: #f5fafd;
  --ink: #16232f;
  --ink-soft: #55697a;
  --white: #ffffff;
  --border: #e3ebf1;
  --radius: 10px;
  --shadow: 0 20px 48px -24px rgba(10, 37, 64, 0.28);
  --shadow-sm: 0 10px 24px -14px rgba(10, 37, 64, 0.22);
  --ff-head: "Geist", sans-serif;
  --ff-body: "Geist", sans-serif;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; overflow-x: hidden; }
body{
  margin: 0;
  font-family: var(--ff-body);
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
h1,h2,h3{ font-family: var(--ff-head); font-weight: 700; letter-spacing: -0.02em; line-height: 1.12; margin: 0 0 16px; color: var(--navy-950); }
p{ line-height: 1.7; color: var(--ink-soft); margin: 0 0 16px; }
.container{ width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; position: relative; }
strong{ color: var(--navy-950); }

i[data-lucide]{ width: 1em; height: 1em; stroke-width: 2.1; }

.text-accent{ color: var(--sky-500); }

/* ---------- Topbar ---------- */
.topbar{
  background: var(--navy-950);
  color: rgba(255,255,255,0.75);
  font-size: 0.82rem;
}
.topbar-inner{
  max-width: 1180px;
  margin: 0 auto;
  padding: 9px 24px;
  display: flex;
  gap: 28px;
  align-items: center;
}
.topbar-inner a{ display:flex; align-items:center; gap:6px; transition: color .2s ease; }
.topbar-inner a:hover{ color: var(--sky-400); }
.topbar-loc{ margin-left: auto; display:flex; align-items:center; gap:6px; }
@media (max-width: 640px){
  .topbar-inner a:nth-child(2){ display:none; }
  .topbar-loc{ display:none; }
}

/* ---------- Header / Nav ---------- */
.site-header{
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s ease;
}
.site-header.scrolled{ box-shadow: 0 8px 24px -18px rgba(10,37,64,.25); }
.nav{ display:flex; align-items:center; justify-content:space-between; padding: 10px 24px; }
.brand img{ height: 80px; width:auto; }
.nav-links{ display:flex; align-items:center; gap: 4px; }
.nav-links a{ font-weight: 600; font-size: 0.92rem; color: var(--navy-800); position:relative; padding: 10px 14px; display:flex; align-items:center; gap:6px; border-radius: 6px; transition: color .2s ease, background .2s ease; }
.nav-links a span{ display:none; }
.nav-links a:not(.nav-cta):hover{ color: var(--sky-600); background: var(--sky-100); }
.nav-cta{
  background: var(--navy-900); color:#fff !important; font-weight: 700 !important; padding: 11px 24px !important;
  margin-left: 8px;
  transition: background .25s ease, transform .25s ease;
}
.nav-cta:hover{ background: var(--sky-600); transform: translateY(-1px); }

.nav-toggle{
  display:none; background:none; border:0; cursor:pointer; padding: 8px; flex-direction:column; gap:5px;
}
.nav-toggle span{ width: 24px; height: 2px; background: var(--navy-900); border-radius: 2px; transition: .3s; }

@media (max-width: 860px){
  .nav-toggle{ display:flex; }
  .nav-links{
    position: fixed; inset: 84px 0 0 0; height: calc(100vh - 84px);
    background: #fff; flex-direction: column; justify-content:flex-start; align-items: stretch;
    padding: 28px 24px; gap: 6px;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .25s ease, transform .25s ease, visibility 0s linear .25s;
  }
  .nav-links.open{ opacity:1; visibility: visible; transform: translateY(0); transition: opacity .25s ease, transform .25s ease; }
  .nav-links a{ font-size: 1.1rem; padding: 16px 6px; border-bottom: 1px solid var(--border); border-radius:0; }
  .nav-cta{ margin-top: 12px; margin-left:0; justify-content:center; }
}

/* ---------- Hero ---------- */
.hero{
  position: relative; min-height: 88vh; display:flex; align-items:center;
  overflow:hidden; isolation:isolate; color:#fff;
}
.hero-bg{ position:absolute; inset:0; z-index:-1; }
.hero-bg img{ width:100%; height:100%; object-fit:cover; }
.hero-overlay{
  position:absolute; inset:0;
  background: linear-gradient(100deg, rgba(7,27,44,.94) 20%, rgba(7,27,44,.82) 45%, rgba(7,27,44,.42) 75%, rgba(7,27,44,.2) 100%);
}
.hero-content{ padding: 70px 0; max-width: 700px; }
.eyebrow{
  display:inline-block; text-transform: uppercase; letter-spacing: .08em; font-size: .78rem;
  font-weight: 600; color: var(--sky-600); margin-bottom: 18px; font-family: var(--ff-body);
}
.eyebrow-on-dark{ color: var(--sky-400); }
.hero h1{ font-size: clamp(2.4rem, 4.8vw, 3.6rem); margin-bottom: 20px; color:#fff; }
.hero-sub{ font-size: 1.16rem; color: rgba(255,255,255,.85); max-width: 640px; margin-bottom: 8px; line-height:1.75; }
.hero-sub strong{ color:#fff; }
@media (max-width: 640px){ .hero-content{ padding: 48px 0; } }

/* ---------- Stats ---------- */
.stats{ background: #fff; border-bottom: 1px solid var(--border); }
.stats-grid{ display:grid; grid-template-columns: repeat(4, 1fr); padding: 44px 0; }
.stat{
  display:flex; flex-direction:column; align-items:center; text-align:center; gap:6px;
  padding: 0 16px; border-left: 1px solid var(--border);
}
.stat:first-child{ border-left:0; }
.stat strong{ font-family: var(--ff-head); font-size: 1.7rem; font-weight:700; color: var(--navy-950); letter-spacing:-0.01em; }
.stat span{ font-size: .8rem; color: var(--ink-soft); }
@media (max-width: 760px){
  .stats-grid{ grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
  .stat:nth-child(3){ border-left:0; }
}

/* ---------- Brands strip ---------- */
.brands{ background: var(--sky-50); border-bottom: 1px solid var(--border); padding: 28px 0; }
.brands-inner{ display:flex; align-items:center; gap: 28px; flex-wrap: wrap; }
.brands-inner > span{ font-size: .78rem; font-weight:600; text-transform:uppercase; letter-spacing:.05em; color: var(--ink-soft); flex-shrink:0; }
.brands-row{ display:flex; gap: 14px; flex-wrap: wrap; flex:1; }
.brand-chip{ display:flex; align-items:center; gap:10px; background: #fff; border:1px solid var(--border); padding: 8px 16px; border-radius: 12px; }
.brand-chip img{ height: 22px; width:auto; }
.brand-chip small{ display:block; color: var(--ink-soft); font-size: .72rem; }
.brand-chip-text strong{ display:block; font-size: .85rem; line-height:1.1; }

/* ---------- Sections ---------- */
.section{ padding: 96px 0; }
.section-alt{ background: var(--sky-150); }
.section-dark{ background: var(--navy-950); color:#fff; }
.section-dark p{ color: rgba(255,255,255,0.68); }
.section-dark h2, .section-dark h3{ color:#fff; }
.section-head{ max-width: 680px; margin: 0 auto 52px; text-align:center; }
.section-head h2{ font-size: clamp(1.8rem, 3vw, 2.4rem); }
.eyebrow-on-dark{ color: var(--sky-400); }

/* ---------- About ---------- */
.about-grid{ display:grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items:center; }
.about-media{ position:relative; }
.about-img-main{ border-radius: var(--radius); box-shadow: var(--shadow); width:100%; aspect-ratio: 4/3.1; object-fit:cover; }
.about-img-sub{
  position:absolute; width: 52%; bottom: -36px; right: -28px; border-radius: var(--radius);
  border: 6px solid #fff; box-shadow: var(--shadow); aspect-ratio: 4/3; object-fit:cover;
}
.check-list li{
  position:relative; padding-left: 22px; margin-bottom:12px; color: var(--ink-soft);
}
.check-list li::before{ content:"—"; position:absolute; left:0; color: var(--sky-500); font-weight:700; }
@media (max-width: 900px){
  .about-grid{ grid-template-columns: 1fr; gap: 80px; }
  .about-img-sub{ right: 0; }
}

/* ---------- Services (3x2 card grid) ---------- */
.cards-grid-3{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card{
  background:#fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 26px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.service-card:hover{ transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--sky-400); }
.service-card-num{
  display:block; font-family: var(--ff-head); font-size: .95rem; font-weight:700;
  color: var(--sky-500); margin-bottom: 14px;
}
.service-card h3{ font-size: 1.08rem; margin-bottom: 8px; }
.service-card p{ margin:0; font-size: .93rem; }
@media (max-width: 900px){ .cards-grid-3{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px){ .cards-grid-3{ grid-template-columns: 1fr; } }

/* ---------- Engines specs ---------- */
.engine-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.engine-card{
  background:#fff; border: 1px solid var(--border); border-radius: var(--radius); overflow:hidden;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.engine-card:hover{ border-color: var(--sky-400); transform: translateY(-4px); box-shadow: var(--shadow); }
.engine-card > img{ width:100%; height: 200px; object-fit:cover; }
.engine-head{ display:flex; align-items:flex-start; justify-content:space-between; padding: 26px 28px 4px; gap: 16px; }
.engine-tag{
  display:block; font-size: .72rem; font-weight:700; text-transform:uppercase; letter-spacing:.05em;
  color: var(--sky-600); margin-bottom: 10px;
}
.engine-tag-ge{ color: var(--navy-700); }
.engine-head h3{ font-size: 1.35rem; margin:0; color: var(--navy-950); }
.engine-card p{ color: var(--ink-soft); }
.ge-logo{ width: 44px; height:44px; object-fit:contain; background:#fff; border-radius: 10px; padding: 6px; flex-shrink:0; border: 1px solid var(--border); }
.engine-card ul{ padding: 16px 28px 28px; }
.engine-card li{
  position:relative; padding-left: 22px; margin-bottom: 13px; color: var(--ink-soft); font-size: .95rem;
}
.engine-card li::before{
  content:""; position:absolute; left:0; top: 8px; width:7px; height:7px; border-radius:50%; background: var(--sky-500);
}
@media (max-width: 900px){ .engine-grid{ grid-template-columns: 1fr; } }

/* ---------- Gallery ---------- */
.gallery{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.gallery figure{ margin:0; position:relative; border-radius: var(--radius); overflow:hidden; box-shadow: var(--shadow); }
.gallery img{ width:100%; height: 280px; object-fit:cover; transition: transform .5s ease; }
.gallery figure:hover img{ transform: scale(1.06); }
.gallery figcaption{
  position:absolute; left:0; right:0; bottom:0; padding: 20px 18px 16px;
  background: linear-gradient(0deg, rgba(7,27,44,.92), transparent);
  color:#fff; font-weight:600; font-size: .92rem;
}
@media (max-width: 900px){ .gallery{ grid-template-columns: 1fr; } .gallery img{ height:220px; } }

/* ---------- Contact ---------- */
.contact-simple{ max-width: 640px; margin: 0 auto; text-align:center; }
.contact-simple p{ margin-left:auto; margin-right:auto; }
.contact-actions{ display:flex; gap: 18px; flex-wrap: wrap; justify-content:center; margin-top: 32px; }
.contact-action{
  display:flex; align-items:center; gap: 14px; background: rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.16);
  border-radius: 12px; padding: 18px 26px; transition: transform .2s ease, border-color .2s ease, background .2s ease;
  text-align:left;
}
.contact-action:hover{ transform: translateY(-3px); border-color: var(--sky-400); background: rgba(255,255,255,.1); }
.contact-action i{ font-size: 1.5rem; color: var(--sky-400); flex-shrink:0; }
.contact-action strong{ display:block; color:#fff; font-size: 1.05rem; }
.contact-action span{ display:block; font-size: .82rem; color: rgba(255,255,255,.6); }
.contact-action-whatsapp i{ color: #3ddc74; }
@media (max-width: 560px){ .contact-actions{ flex-direction:column; } .contact-action{ justify-content:center; } }

/* ---------- Footer ---------- */
.site-footer{ background: var(--navy-950); color: rgba(255,255,255,0.55); padding: 36px 0; }
.footer-grid{ display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap: 16px; }
.footer-brand{ display:flex; align-items:center; gap: 16px; }
.footer-brand img{ height: 34px; }
.footer-brand p{ margin:0; font-size: .78rem; color: rgba(255,255,255,0.45); }
.footer-copy{ margin:0; font-size: .8rem; }

/* ---------- WhatsApp FAB ---------- */
.whatsapp-fab{
  position: fixed; right: 24px; bottom: 24px; width: 58px; height:58px; border-radius:50%;
  background: #25D366; color:#fff; display:flex; align-items:center; justify-content:center;
  font-size: 1.6rem; box-shadow: 0 10px 30px -6px rgba(0,0,0,.35); z-index: 90; transition: transform .2s ease;
}
.whatsapp-fab:hover{ transform: scale(1.08); }

/* ---------- Reveal animation ---------- */
.reveal{ opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view{ opacity: 1; transform: translateY(0); }

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