/* =========================================================================
   AQVION LLC — Website Stylesheet
   Editorial engineering aesthetic · US B2B water-treatment
   Video-led hero · image-rich · aligned with the AQVION brand system.
   ========================================================================= */

:root{
  --ink:#0A1C20;
  --ink-soft:#2A3B3F;
  --paper:#F4F1E8;
  --paper-2:#ECE7DA;
  --line:#0a1c2022;
  --accent:#1C6E63;
  --accent-2:#3FA796;
  --muted:#6B7775;
  --maxw:1180px;
  --gut:clamp(20px,5vw,72px);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.6;font-weight:400;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.serif{font-family:Georgia,"Times New Roman",serif;font-weight:400}
.mono{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-weight:400}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;font-weight:400;line-height:1.05;letter-spacing:-.01em}
.label{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
em{font-style:italic}

.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--gut);padding-right:var(--gut)}
section{padding:clamp(64px,9vw,140px) 0}
.rule{border:0;border-top:1px solid var(--line)}

/* ---- header ---- */
header.nav{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .3s,border-color .3s}
header.nav.solid{background:rgba(244,241,232,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px var(--gut)}
.brand{display:flex;align-items:center;gap:12px;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-weight:500;letter-spacing:.14em;font-size:.95rem;color:#fff}
header.nav.solid .brand{color:var(--ink)}
.brand .mark{width:30px;height:30px;border-radius:50%;background:radial-gradient(circle at 32% 30%,var(--accent-2),var(--accent) 55%,var(--ink));box-shadow:inset 0 0 0 1px #ffffff33}
.brand img.mark-img{height:34px;width:auto}
.brand .mk-light{display:block}
.brand .mk-dark{display:none}
header.nav.solid .brand .mk-light{display:none}
header.nav.solid .brand .mk-dark{display:block}
.hero-logo{height:clamp(58px,8vw,104px);width:auto;margin-bottom:24px}
.foot-logo{height:86px;width:auto;margin-bottom:18px}
.navlinks{display:flex;gap:28px;align-items:center}
.navlinks a{font-size:.9rem;color:#ffffffcc;transition:color .2s}
header.nav.solid .navlinks a{color:var(--ink-soft)}
.navlinks a:hover{color:var(--accent-2)}
header.nav.solid .navlinks a:hover{color:var(--accent)}
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:#fff;padding:13px 22px;border-radius:2px;font-size:.85rem;font-weight:500;letter-spacing:.02em;transition:background .2s,transform .2s;border:1px solid transparent}
.btn:hover{background:var(--ink);transform:translateY(-1px)}
.btn.dark{background:var(--ink)}
.btn.dark:hover{background:var(--accent)}
.btn.ghost{background:transparent;color:#fff;border:1px solid #ffffff66}
.btn.ghost:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn.ghost-ink{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn.ghost-ink:hover{background:var(--ink);color:#fff}

/* ---- VIDEO HERO ---- */
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;overflow:hidden;color:#fff}
.hero video,.hero .poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.hero .scrim{position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(7,20,23,.55),rgba(7,20,23,.2) 32%,rgba(7,20,23,.4) 65%,rgba(7,20,23,.88))}
.hero-inner{width:100%;padding-bottom:clamp(48px,7vw,96px);padding-top:140px}
.hero .eyebrow{display:inline-flex;gap:10px;align-items:center;color:#ffffffcc;margin-bottom:22px}
.hero .eyebrow .label{color:#ffffffcc}
.hero h1{font-size:clamp(3rem,10vw,8rem);letter-spacing:-.02em;text-shadow:0 2px 40px rgba(0,0,0,.25)}
.hero h1 em{color:var(--accent-2)}
.hero p.lead{max-width:56ch;margin-top:24px;font-size:clamp(1.05rem,1.7vw,1.35rem);color:#ffffffe6}
.hero .cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-meta{display:flex;flex-wrap:wrap;gap:32px;margin-top:clamp(40px,6vw,72px);padding-top:26px;border-top:1px solid #ffffff33}
.hero-meta .k{font-size:.95rem;color:#fff}
.hero-meta .label{display:block;margin-bottom:6px;color:#ffffff99}
.scroll-cue{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);color:#ffffffaa;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.68rem;letter-spacing:.2em;z-index:1}

/* ---- section heads ---- */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:clamp(28px,4vw,52px)}
.sec-head h2{font-size:clamp(2rem,4.4vw,3.4rem);max-width:20ch}
.sec-head h2 em,h2 em{color:var(--accent)}

.intro-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(28px,5vw,64px);align-items:start}
.intro-grid p.big{font-size:clamp(1.3rem,2.6vw,2rem);font-family:Georgia,"Times New Roman",serif;line-height:1.25}

/* ---- cards ---- */
.cols-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.card{background:var(--paper);padding:clamp(24px,3vw,38px);transition:background .25s}
.card:hover{background:#fff}
.card .num{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.75rem;color:var(--accent);letter-spacing:.1em}
.card h3{font-size:1.5rem;margin:14px 0 10px}
.card p{font-size:.98rem;color:var(--ink-soft)}

/* ---- feature rows (image + text) ---- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.feature.flip .ftext{order:2}
.fimg{position:relative;border-radius:3px;overflow:hidden;aspect-ratio:4/3;background:var(--paper-2)}
.fimg img{width:100%;height:100%;object-fit:cover;transition:transform .8s ease}
.fimg:hover img{transform:scale(1.04)}
.fimg .cap{position:absolute;left:14px;bottom:12px;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.66rem;letter-spacing:.12em;color:#fff;text-transform:uppercase;background:rgba(7,20,23,.55);padding:6px 10px;border-radius:2px}
.ftext h2{font-size:clamp(1.8rem,3.6vw,2.8rem);margin-bottom:16px}
.ftext p{color:var(--ink-soft);margin-bottom:14px;max-width:52ch}
.ftext .label{display:block;margin-bottom:14px}

/* ---- full-bleed image band ---- */
.band{position:relative;min-height:62vh;display:flex;align-items:center;color:#fff;background-size:cover;background-position:center;background-attachment:fixed}
.band:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,20,23,.82),rgba(7,20,23,.45))}
.band .wrap{position:relative}
.band h2{color:#fff;font-size:clamp(2rem,5vw,3.6rem);max-width:18ch}
.band h2 em{color:var(--accent-2)}
.band p{color:#ffffffd9;max-width:52ch;margin-top:18px}

/* ---- dark approach panel ---- */
.panel{background:var(--ink);color:var(--paper);border-radius:3px;padding:clamp(32px,5vw,64px);position:relative;overflow:hidden}
.panel h2{color:var(--paper)}
.panel .label{color:#ffffff88}
.panel:after{content:"";position:absolute;right:-20%;bottom:-40%;width:70%;height:120%;background:radial-gradient(circle,var(--accent) 0%,transparent 65%);opacity:.45}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;z-index:1}
.metric .n{font-family:Georgia,"Times New Roman",serif;font-size:clamp(2.2rem,5vw,3.4rem);line-height:1}
.metric .n em{color:var(--accent-2)}
.metric .t{font-size:.85rem;color:#ffffffaa;margin-top:8px}

/* ---- steps ---- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.step{background:var(--paper);padding:clamp(22px,2.6vw,32px)}
.step .label{color:var(--accent)}
.step h3{font-size:1.25rem;margin:12px 0 8px}
.step p{font-size:.92rem;color:var(--ink-soft)}

/* ---- gallery ---- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.gallery figure{position:relative;overflow:hidden;border-radius:3px;aspect-ratio:3/4;background:var(--paper-2)}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .8s}
.gallery figure:hover img{transform:scale(1.05)}
.gallery figcaption{position:absolute;left:12px;bottom:10px;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.62rem;letter-spacing:.1em;color:#fff;text-transform:uppercase;background:rgba(7,20,23,.55);padding:5px 9px;border-radius:2px}

/* ---- contact ---- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px)}
.contact-grid h2{font-size:clamp(2.2rem,5vw,3.6rem)}
.kv{margin-top:22px}
.kv .label{display:block;margin-bottom:4px}
.kv a,.kv address{font-style:normal;font-size:1.05rem;color:var(--ink)}

/* ---- footer ---- */
footer{background:var(--ink);color:var(--paper);padding:clamp(48px,7vw,90px) 0 40px}
footer a{color:#ffffffcc}
footer a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:48px}
.foot-grid h4{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:#ffffff77;margin-bottom:16px;font-weight:500}
.foot-grid p,.foot-grid li{color:#ffffffbb;font-size:.95rem;line-height:1.9;list-style:none}
.foot-brand{display:flex;align-items:center;gap:12px;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;letter-spacing:.14em;margin-bottom:16px;color:#fff}
.foot-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;border-top:1px solid #ffffff22;padding-top:24px;font-size:.82rem;color:#ffffff88}
.foot-bottom a{margin-left:20px}

/* ---- legal ---- */
.legal{max-width:820px}
.legal h1{font-size:clamp(2.4rem,6vw,4rem);margin-bottom:8px}
.legal h2{font-size:1.5rem;margin:36px 0 12px}
.legal p,.legal li{color:var(--ink-soft);margin-bottom:12px}
.legal ul{padding-left:22px;margin-bottom:12px}
.legal .updated{color:var(--muted);font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.8rem;letter-spacing:.08em;margin-bottom:28px}
.legal .disclaimer{background:var(--paper-2);border-left:3px solid var(--accent);padding:16px 20px;font-size:.9rem;color:var(--ink-soft);margin:28px 0}
.legal.pad-top{padding-top:120px}

/* ---- responsive ---- */
@media(max-width:860px){
  .navlinks{display:none}
  .intro-grid,.feature,.contact-grid{grid-template-columns:1fr}
  .feature.flip .ftext{order:0}
  .cols-3,.steps,.metrics,.gallery{grid-template-columns:1fr 1fr}
  .band{background-attachment:scroll}
  .hero{min-height:90svh}
}
@media(max-width:520px){
  .cols-3,.steps,.metrics,.gallery{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  .hero video{display:none}
  .fimg img,.gallery img{transition:none}
}