/* ===================== AIRAA — visual identity ===================== */
:root{
  --navy:#091422; --navy2:#0d1d30; --panel:#10233a; --panel2:#15304c;
  --teal:#1aa8a8; --teal-d:#117a80; --amber:#f5b042; --amber2:#ffd17a;
  --ink:#eaf1f7; --mut:#9db2c6; --line:rgba(255,255,255,.08);
  --r:16px; --maxw:1200px;
  --ff:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --serif:'Fraunces','Georgia',serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--ff);background:var(--navy);color:var(--ink);-webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.6}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.1;margin:0;font-weight:800;letter-spacing:-.02em}
.skip{position:absolute;left:-999px;top:0;background:var(--amber);color:#111;padding:.6rem 1rem;z-index:200;border-radius:0 0 8px 0}
.skip:focus{left:0}

.nav{position:fixed;inset:0 0 auto 0;z-index:100;display:flex;align-items:center;gap:1.4rem;padding:.8rem clamp(1rem,4vw,2.4rem);transition:.35s}
.nav.scrolled{background:rgba(9,20,34,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);padding-top:.6rem;padding-bottom:.6rem}
.brand{display:flex;align-items:center}
.brand-logo{height:38px;width:auto;display:block;filter:drop-shadow(0 2px 6px rgba(0,0,0,.4))}
.nav-links{display:flex;gap:1.5rem;margin-left:auto;font-size:.95rem;color:var(--mut)}
.nav-links a{position:relative;padding:.2rem 0;transition:.2s}
.nav-links a:hover{color:#fff}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:2px;background:var(--amber);transition:.25s}
.nav-links a:hover::after{width:100%}
.nav-cta{border:1px solid var(--teal);color:var(--teal);padding:.5rem 1rem;border-radius:999px;font-weight:600;font-size:.9rem;transition:.25s}
.nav-cta:hover{background:var(--teal);color:#04141a}

.hero{position:relative;min-height:100svh;display:flex;align-items:center;overflow:hidden}
.hero-video-wrap{position:absolute;inset:0;z-index:0}
.hero-video{position:absolute;inset:-4%;width:108%;height:108%;object-fit:cover;filter:saturate(1.05) contrast(1.05)}
.hero-grade{position:absolute;inset:0;background:radial-gradient(120% 90% at 70% 20%,rgba(9,20,34,0) 0%,rgba(9,20,34,.55) 55%,rgba(9,20,34,.92) 100%),linear-gradient(180deg,rgba(9,20,34,.55),rgba(9,20,34,.2) 30%,rgba(9,20,34,.8))}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(26,168,168,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(26,168,168,.06) 1px,transparent 1px);background-size:54px 54px;mask-image:radial-gradient(80% 60% at 50% 40%,#000,transparent 80%)}
.hero-inner{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:6rem clamp(1.2rem,5vw,2.4rem) 4rem;width:100%}
.eyebrow{text-transform:uppercase;letter-spacing:.28em;font-size:.72rem;font-weight:600;color:var(--amber2);margin:0 0 1rem}
.hero-title{font-family:var(--serif);font-size:clamp(2.4rem,7vw,5rem);font-weight:600;letter-spacing:-.03em}
.hero-title span{color:var(--amber);font-style:italic}
.hero-sub{max-width:640px;margin:1.4rem 0 2rem;color:#cdd9e6;font-size:clamp(1rem,1.6vw,1.18rem)}
.hero-sub b{color:#fff;font-weight:600}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.5rem;border-radius:999px;font-weight:600;transition:.25s;font-size:1rem;border:none;cursor:pointer;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--amber),#e8952f);color:#241503;box-shadow:0 10px 30px -8px rgba(245,176,66,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px -8px rgba(245,176,66,.7)}
.btn-ghost{border:1px solid rgba(255,255,255,.28);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff}
.hero-stats{display:flex;gap:2.4rem;margin-top:3rem;flex-wrap:wrap}
.hero-stats b{font-size:1.8rem;font-weight:800;color:#fff;display:block;font-family:var(--serif)}
.hero-stats span{font-size:.8rem;color:var(--mut);text-transform:uppercase;letter-spacing:.14em}
.scroll-cue{position:absolute;bottom:1.5rem;left:50%;translate:-50% 0;width:26px;height:42px;border:2px solid rgba(255,255,255,.35);border-radius:14px;z-index:2}
.scroll-cue span{position:absolute;top:8px;left:50%;translate:-50% 0;width:4px;height:8px;border-radius:2px;background:var(--amber);animation:cue 1.6s infinite}
@keyframes cue{0%{opacity:0;transform:translate(-50%,0)}30%{opacity:1}70%{opacity:1}100%{opacity:0;transform:translate(-50%,16px)}}

.section{position:relative;max-width:var(--maxw);margin:0 auto;padding:clamp(4rem,9vw,7rem) clamp(1.2rem,5vw,2.4rem)}
.section-head{max-width:720px;margin-bottom:2.6rem}
.kicker{text-transform:uppercase;letter-spacing:.24em;font-size:.72rem;color:var(--teal);font-weight:700;margin:0 0 .8rem}
.section h2{font-family:var(--serif);font-weight:600;font-size:clamp(1.9rem,4.4vw,3rem)}
.lead{color:var(--mut);font-size:1.08rem;margin-top:1rem}
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

.flow{list-style:none;padding:0;margin:0;display:grid;gap:1rem;counter-reset:s;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.flow li{position:relative;background:linear-gradient(160deg,var(--panel),var(--navy2));border:1px solid var(--line);border-radius:var(--r);padding:1.6rem 1.3rem 1.4rem;overflow:hidden}
.flow li::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;right:6px;font-size:4.2rem;font-weight:800;color:rgba(255,255,255,.05);font-family:var(--serif)}
.flow .who{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--amber2);font-weight:700;margin-bottom:.5rem}
.flow h3{font-size:1.15rem;margin-bottom:.5rem}
.flow p{color:var(--mut);font-size:.92rem;margin:0}
.flow li::after{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(var(--teal),var(--amber))}

.disciplines{overflow:hidden}
.parallax-band{position:absolute;inset:auto -10% -20% -10%;height:70%;z-index:-1;background:radial-gradient(60% 100% at 50% 100%,rgba(26,168,168,.14),transparent 70%)}
.disc-grid{display:grid;gap:1.1rem;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.disc{position:relative;padding:1.7rem 1.5rem;border-radius:var(--r);cursor:pointer;background:linear-gradient(165deg,var(--panel2),var(--navy2));border:1px solid var(--line);transition:.3s;overflow:hidden}
.disc:hover{transform:translateY(-5px);border-color:rgba(26,168,168,.5);box-shadow:0 20px 44px -20px rgba(0,0,0,.7)}
.disc .ico{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;margin-bottom:1rem;background:linear-gradient(135deg,var(--teal-d),var(--teal));color:#eafcff}
.disc.d1 .ico{background:linear-gradient(135deg,#0f6a70,#1aa8a8)}
.disc.d2 .ico{background:linear-gradient(135deg,#7a4d12,#f5b042);color:#2a1902}
.disc.d3 .ico{background:linear-gradient(135deg,#3a5a8a,#5fa8d8)}
.disc.d4 .ico{background:linear-gradient(135deg,#6a2f7a,#c07fd8)}
.disc.d5 .ico{background:linear-gradient(135deg,#8a3a2f,#e07a5f)}
.disc h3{font-size:1.3rem;margin-bottom:.25rem}
.disc .tag{font-size:.76rem;color:var(--amber2);text-transform:uppercase;letter-spacing:.1em;font-weight:600}
.disc p{color:var(--mut);font-size:.9rem;margin:.7rem 0 1rem}
.disc .cnt{font-size:.82rem;color:var(--teal);font-weight:700}

.toolbar{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;margin-bottom:1.4rem}
.search{display:flex;align-items:center;gap:.6rem;flex:1;min-width:260px;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:.7rem 1.2rem;color:var(--mut);transition:.25s}
.search:focus-within{border-color:var(--teal);box-shadow:0 0 0 3px rgba(26,168,168,.15)}
.search input{flex:1;background:none;border:none;outline:none;color:var(--ink);font-size:1rem;font-family:inherit}
.chips{display:flex;gap:.5rem;flex-wrap:wrap}
.chip{padding:.5rem 1rem;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--mut);cursor:pointer;font-size:.86rem;font-weight:600;font-family:inherit;transition:.2s}
.chip:hover{color:#fff;border-color:rgba(255,255,255,.3)}
.chip.on{background:var(--amber);color:#241503;border-color:var(--amber)}
.result-count{color:var(--mut);font-size:.85rem;margin:.2rem 0 1.2rem}
.cards{display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(310px,1fr))}
.card{background:linear-gradient(165deg,var(--panel),var(--navy2));border:1px solid var(--line);border-radius:var(--r);padding:1.3rem;cursor:pointer;transition:.28s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);border-color:rgba(245,176,66,.45);box-shadow:0 18px 40px -22px rgba(0,0,0,.75)}
.card .badge{display:inline-flex;align-items:center;gap:.4rem;font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;padding:.3rem .7rem;border-radius:999px;margin-bottom:.9rem}
.badge.process{background:rgba(26,168,168,.16);color:#5fd6d6}
.badge.static{background:rgba(245,176,66,.16);color:var(--amber2)}
.badge.rotating{background:rgba(95,168,216,.16);color:#8fc6ea}
.badge.instrument{background:rgba(192,127,216,.16);color:#d6a8e8}
.badge.electrical{background:rgba(224,122,95,.16);color:#f0a58f}
.card h3{font-size:1.12rem;margin-bottom:.35rem}
.card .sym{color:#fff;font-weight:600;font-size:.96rem;margin-bottom:.5rem}
.card .cause{color:var(--mut);font-size:.85rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .foot{display:flex;align-items:center;justify-content:space-between;margin-top:1rem;font-size:.8rem;color:var(--teal);font-weight:600}
.card .vid{color:var(--amber2)}
.card mark{background:rgba(245,176,66,.28);color:#fff;border-radius:3px;padding:0 2px}
.empty{color:var(--mut);text-align:center;padding:2rem}

.modal{position:fixed;inset:0;z-index:300;display:grid;place-items:center;padding:1rem}
.modal[hidden]{display:none!important}
.modal-bg{position:absolute;inset:0;background:rgba(4,10,18,.72);backdrop-filter:blur(6px)}
.modal-card{position:relative;max-width:640px;width:100%;max-height:88vh;overflow:auto;background:linear-gradient(170deg,var(--panel2),var(--navy2));border:1px solid var(--line);border-radius:20px;padding:2rem;box-shadow:0 40px 90px -30px rgba(0,0,0,.9);animation:pop .3s ease}
@keyframes pop{from{opacity:0;transform:translateY(20px) scale(.97)}to{opacity:1;transform:none}}
.modal-x{position:absolute;top:1rem;right:1.1rem;background:none;border:none;color:var(--mut);font-size:1.8rem;cursor:pointer;line-height:1}
.modal-x:hover{color:#fff}
.modal .badge{display:inline-block}
.modal h2{font-family:var(--serif);font-weight:600;font-size:1.6rem;margin:.6rem 0 .3rem}
.modal .m-sym{color:var(--amber2);font-weight:600;margin-bottom:1.2rem}
.m-meta{display:grid;gap:.8rem;margin-bottom:1.4rem}
.m-meta div{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:12px;padding:.8rem 1rem}
.m-meta b{display:block;font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;color:var(--teal);margin-bottom:.25rem}
.m-steps{counter-reset:st;list-style:none;padding:0;margin:0 0 1.2rem}
.m-steps li{counter-increment:st;position:relative;padding:.7rem 0 .7rem 2.6rem;border-bottom:1px solid var(--line);color:#dce6ef;font-size:.95rem}
.m-steps li:last-child{border-bottom:none}
.m-steps li::before{content:counter(st);position:absolute;left:0;top:.6rem;width:1.8rem;height:1.8rem;border-radius:8px;background:linear-gradient(135deg,var(--teal-d),var(--teal));color:#eafcff;display:grid;place-items:center;font-weight:700;font-size:.85rem}
.m-esc{background:rgba(245,176,66,.1);border:1px solid rgba(245,176,66,.3);border-radius:12px;padding:.9rem 1.1rem;font-size:.88rem;color:var(--amber2)}
.m-video{display:inline-flex;align-items:center;gap:.5rem;margin-top:1rem;color:var(--teal);font-weight:600;font-size:.9rem}

.footer{border-top:1px solid var(--line);text-align:center;padding:3rem 1.5rem;color:var(--mut);background:var(--navy2)}
.foot-brand{display:inline-flex;align-items:center;margin-bottom:.8rem}
.foot-logo{height:34px;width:auto;display:block}
.footer p{margin:.3rem 0;font-size:.9rem}
.footer .tiny{font-size:.78rem;opacity:.6}
.about-grid{display:grid;gap:2rem;grid-template-columns:1.4fr 1fr;align-items:start}
.about p{color:var(--mut);margin:1rem 0}
.about .note{background:rgba(245,176,66,.08);border-left:3px solid var(--amber);padding:.9rem 1.1rem;border-radius:0 10px 10px 0;color:var(--amber2);font-size:.9rem}
.about-card{background:linear-gradient(165deg,var(--panel2),var(--navy2));border:1px solid var(--line);border-radius:var(--r);padding:1.6rem}
.about-card h3{font-size:1.15rem;margin-bottom:1rem}
.ladder{list-style:none;padding:0;margin:0;display:grid;gap:.9rem}
.ladder li{display:flex;gap:.9rem;align-items:flex-start}
.ladder span{flex:none;width:2rem;height:2rem;border-radius:8px;background:linear-gradient(135deg,var(--teal-d),var(--amber));color:#04141a;display:grid;place-items:center;font-weight:800}
.ladder b{font-size:.98rem}
.ladder p{margin:0;font-size:.82rem;color:var(--mut)}

@media(max-width:820px){.nav-links{display:none}.about-grid{grid-template-columns:1fr}.hero-stats{gap:1.6rem}}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hero-video{display:none}
  .hero-video-wrap{background:#091422 url(assets/img/hero-poster.jpg) center/cover}
  .reveal{opacity:1;transform:none;transition:none}
  .scroll-cue span{animation:none}
  [data-depth]{transform:none!important}
}