@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Inter:wght@300;400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');
:root{
  /* brand-derived */
  --blue:#1B9DE8;         /* AIRH2O blue, slightly deepened for contrast on white */
  --blue-br:#30B0F0;      /* logo blue */
  --blue-deep:#0B7BC0;
  --red:#E5322B;          /* logo red, restrained */
  --navy:#0A1826;         /* deep ink, grounding */
  --navy-2:#122539;
  --ink:#0A1826;
  --paper:#FCFCFB;        /* clean off-white */
  --paper-2:#F4F6F8;      /* faint cool band */
  --line:#E4E8EC;
  --line-d:#20344A;
  --steel:#54657A;        /* muted body */
  --steel-d:#8FA3B8;      /* muted on dark */
  --white:#FFFFFF;
  --serif:'Fraunces',Georgia,serif;
  --sans:'Inter',sans-serif;
  --mono:'IBM Plex Mono',monospace;
  --maxw:1320px;
  --gutter:clamp(22px,5vw,80px);
  --ease:cubic-bezier(.2,.6,.3,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}

h1,h2,h3,h4{font-family:var(--serif);font-weight:500;line-height:1.06;letter-spacing:-0.015em;color:var(--navy)}
.serif{font-family:var(--serif)}
.display{font-family:var(--serif);font-weight:500;font-size:clamp(2.8rem,7vw,6.4rem);line-height:1.0;letter-spacing:-0.02em}
.h1{font-size:clamp(2.4rem,5.5vw,4.8rem);letter-spacing:-0.02em;font-weight:500}
.h2{font-size:clamp(2rem,4vw,3.5rem);letter-spacing:-0.018em;font-weight:500}
.h3{font-size:clamp(1.3rem,2vw,1.8rem);font-weight:500;letter-spacing:-0.01em}
.lead{font-size:clamp(1.1rem,1.4vw,1.4rem);line-height:1.55;color:var(--steel);font-weight:300}
.body-lg{font-size:1.06rem;color:var(--steel);font-weight:400}
.muted{color:var(--steel)}

/* mono eyebrow */
.eyebrow{font-family:var(--mono);font-size:.74rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--blue)}
.eyerow{display:flex;align-items:center;gap:16px;margin-bottom:30px}
.eyerow::before{content:"";width:30px;height:1px;background:var(--blue)}
.eyerow.on-dark::before{background:var(--blue-br)}
.eyerow.on-dark .eyebrow{color:var(--blue-br)}

.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter)}
.pad{padding-block:clamp(88px,12vw,180px)}
.pad-s{padding-block:clamp(60px,8vw,110px)}
section{position:relative}

/* NAV */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:22px var(--gutter);transition:.5s var(--ease);border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(252,252,251,.9);backdrop-filter:blur(18px) saturate(1.3);border-bottom:1px solid var(--line);padding-block:14px}
.nav.scrolled .nav__links a{color:var(--navy)}
.nav.scrolled .burger span{background:var(--navy)}
.nav__logo img{height:46px;width:auto;display:block;transition:height .4s var(--ease)}
.nav.scrolled .nav__logo img{height:40px}
.nav__logo .lw{display:none}
.nav__logo .lc{display:block}
.nav__links{display:flex;align-items:center;gap:4px}
.nav__links a{font-family:var(--mono);font-size:.76rem;font-weight:500;letter-spacing:.06em;color:rgba(255,255,255,.9);padding:10px 18px;transition:.25s}
.nav__links a:not(.nav__cta):hover{color:var(--blue)}
.nav__links a.active:not(.nav__cta){color:var(--blue)}
.nav__cta{background:rgba(255,255,255,.14);color:#fff!important;margin-left:14px;border-radius:1px;border:1px solid rgba(255,255,255,.35);transition:.3s var(--ease)}
.nav.scrolled .nav__cta{background:var(--navy);border-color:var(--navy)}
.nav__cta:hover{background:var(--blue)!important;border-color:var(--blue)!important;color:#fff!important}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;z-index:101}
.burger span{width:26px;height:2px;background:#fff;transition:.3s var(--ease)}
.mobile{position:fixed;inset:0;z-index:99;background:var(--paper);display:flex;flex-direction:column;justify-content:center;padding:0 var(--gutter);gap:2px;transform:translateX(100%);transition:transform .55s var(--ease)}
.mobile.open{transform:translateX(0)}
.mobile a{font-family:var(--serif);font-weight:500;font-size:clamp(2.2rem,9vw,3.4rem);letter-spacing:-.02em;color:var(--navy);padding:10px 0;display:flex;align-items:baseline;gap:18px}
.mobile a .n{font-family:var(--mono);font-size:.85rem;font-weight:500;color:var(--blue)}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:12px;font-family:var(--mono);font-size:.8rem;font-weight:500;letter-spacing:.05em;padding:17px 32px;border-radius:1px;cursor:pointer;transition:.3s var(--ease);border:1px solid transparent}
.btn--dark{background:var(--navy);color:var(--paper)}
.btn--dark:hover{background:var(--blue);transform:translateY(-2px)}
.btn--ghost{border-color:var(--navy);color:var(--navy)}
.btn--ghost:hover{background:var(--navy);color:var(--paper)}
.btn--light{background:var(--paper);color:var(--navy)!important}
.btn--light:hover{background:var(--blue);color:var(--white)!important;transform:translateY(-2px)}
.btn--blue{background:var(--blue);color:var(--white)}
.btn--blue:hover{background:var(--navy);transform:translateY(-2px)}
.btn .arr{transition:transform .3s var(--ease)}
.btn:hover .arr{transform:translateX(5px)}

/* page hero over image */
.phero{position:relative;overflow:hidden;padding-top:170px;padding-bottom:clamp(60px,8vw,110px);background:var(--navy)}
.phero *{color:var(--paper)}
.phero .eyebrow{color:var(--blue-br)}.phero .eyerow::before{background:var(--blue-br)}
.phero__bg{position:absolute;inset:0;z-index:0}
.phero__bg img{width:100%;height:100%;object-fit:cover;opacity:.34}
.phero::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(10,24,38,.7),rgba(10,24,38,.5) 40%,var(--navy))}
.phero .wrap{position:relative;z-index:2}
.phero h1{color:var(--white)}

/* stat */
.statn{font-family:var(--serif);font-weight:500;font-size:clamp(2.6rem,5vw,4.4rem);letter-spacing:-.02em;line-height:1;color:var(--navy)}
.statl{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--steel);margin-top:12px}

/* editorial rule accents */
.rule{height:1px;background:var(--line);border:0}

/* cards */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,84px);align-items:center}
.grid{display:grid;gap:1px;background:var(--line)}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}

/* numbered service rows */
.srow{display:grid;grid-template-columns:auto 1fr auto;gap:clamp(20px,4vw,64px);align-items:baseline;padding:clamp(30px,4vw,54px) 0;border-top:1px solid var(--line);transition:.4s var(--ease)}
.srow:last-child{border-bottom:1px solid var(--line)}
.srow__n{font-family:var(--mono);font-size:.8rem;color:var(--blue)}
.srow__main h3{font-family:var(--serif);font-size:clamp(1.6rem,2.8vw,2.6rem);font-weight:500;letter-spacing:-.02em;margin-bottom:12px;transition:.35s var(--ease)}
.srow__main p{color:var(--steel);max-width:640px}
.srow__tags{display:flex;flex-direction:column;gap:7px;text-align:right}
.srow__tags span{font-family:var(--mono);font-size:.72rem;color:var(--steel)}
.srow:hover .srow__main h3{color:var(--blue);transform:translateX(10px)}

/* image tiles */
.tile{position:relative;overflow:hidden;background:var(--navy)}
.tile img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease),opacity .5s;opacity:.94}
.tile:hover img{transform:scale(1.05);opacity:1}
.tile__cap{position:absolute;left:0;right:0;bottom:0;padding:28px;z-index:2;background:linear-gradient(transparent,rgba(10,24,38,.92))}
.tile__cap *{color:var(--paper)}
.tile__cap .k{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--blue-br)}
.tile__cap h3{font-family:var(--serif);color:var(--white);font-size:1.5rem;font-weight:500;margin-top:6px}

/* footer */
.foot{background:var(--navy);color:var(--steel-d);padding-block:90px 44px}
.foot *{color:var(--steel-d)}
.foot__top{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:60px;border-bottom:1px solid var(--line-d)}
.foot__logo{height:36px;margin-bottom:24px}
.foot h4{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--blue-br);margin-bottom:22px;font-weight:500}
.foot a{display:block;padding:6px 0;font-size:.92rem;transition:.2s}
.foot a:hover{color:var(--paper)}
.foot__reg{font-family:var(--mono);font-size:.72rem;line-height:2;color:var(--steel)}
.foot__bot{display:flex;justify-content:space-between;align-items:center;padding-top:32px;font-family:var(--mono);font-size:.72rem;color:var(--steel);flex-wrap:wrap;gap:12px}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.1s}.reveal.d2{transition-delay:.2s}.reveal.d3{transition-delay:.3s}.reveal.d4{transition-delay:.4s}

.center{text-align:center}
.mt-s{margin-top:22px}.mt-m{margin-top:38px}.mt-l{margin-top:62px}
.maxw-620{max-width:620px}.maxw-720{max-width:720px}.maxw-820{max-width:820px}

@media(max-width:980px){
  .nav__links{display:none}.burger{display:flex}
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:40px}
  .foot__top{grid-template-columns:1fr 1fr}
  .srow{grid-template-columns:auto 1fr;gap:22px}.srow__tags{display:none}
}
@media(max-width:600px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .foot__top{grid-template-columns:1fr}.foot__bot{flex-direction:column;align-items:flex-start}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}

/* ============ MOBILE HARDENING ============ */
@media(max-width:600px){
  html,body{max-width:100%;overflow-x:hidden}
  /* never let anything push page width */
  section,.wrap,header,footer{max-width:100vw}
  img{max-width:100%;height:auto}
  /* tighten headline leading so big serif type doesn't look loose/broken */
  .display{font-size:clamp(2.4rem,10vw,3.4rem);line-height:1.04}
  .h1{font-size:clamp(2rem,8.5vw,2.8rem);line-height:1.06}
  .h2{font-size:clamp(1.7rem,7vw,2.3rem);line-height:1.08}
  .lead{font-size:1.05rem}
  /* section padding a touch tighter on phones */
  .pad{padding-block:clamp(56px,14vw,80px)}
  .pad-s{padding-block:clamp(44px,10vw,64px)}
  /* inner page heroes: clear the nav, sensible spacing */
  .phero{padding-top:128px;padding-bottom:48px}
  /* buttons full-width-ish and centered so they don't look stranded */
  .btn{padding:15px 24px;font-size:.78rem}
  /* split sections: comfortable gap */
  .split{gap:32px}
  /* eyebrow: allow wrap, smaller */
  .eyerow{flex-wrap:wrap;gap:12px}
  .eyebrow{font-size:.68rem;letter-spacing:.14em}
  /* clients logos: 2 per row, contained */
  .clients__logos{gap:24px 30px}
  .clients__logos img{height:30px;max-width:120px}
  /* service rows: don't let the number cramp the title */
  .srow{gap:14px}
  .srow__main h3{font-size:1.4rem}
  /* footer: comfortable */
  .foot{padding-block:60px 36px}
  .foot__top{gap:32px}
}
@media(max-width:980px){
  /* mid-size: keep big display type from overflowing */
  .display{font-size:clamp(2.6rem,8vw,4.6rem)}
}

/* CTA (shared) */
.cta{background:var(--blue);color:#fff;position:relative;overflow:hidden}
.cta *{color:#fff}
.cta h2{color:#fff}
.cta .btn--light{background:#fff;color:var(--blue)!important}
.cta .btn--light:hover{background:var(--navy);color:#fff!important}