:root{
  --ink:#0b1f3a;--ink2:#14305a;--blue:#0b6fd0;
  --steel:#eef2f6;--steel2:#d5dde6;--zinc:#9fb3c8;--text:#1d2b40;--muted:#52627a;
  --call:#d94f00;--call-h:#bf4400;--wa:#138a47;--wa-h:#0f7339;
  --rib:repeating-linear-gradient(90deg,rgba(255,255,255,.06) 0 2px,transparent 2px 16px);
  --font:'Archivo','Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--font);color:var(--text);background:#fff;line-height:1.6;font-size:17px;-webkit-text-size-adjust:100%}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
svg{width:1em;height:1em;flex:none;fill:currentColor}
:focus-visible{outline:3px solid #ffb98f;outline-offset:2px}
.wrap{width:min(1180px,92%);margin-inline:auto}
h1,h2,h3{color:var(--ink);line-height:1.08;font-weight:800;font-stretch:84%;letter-spacing:-.01em}
h2{font-size:clamp(30px,4vw,48px)}
h3{font-size:21px;line-height:1.2}
p{color:var(--muted)}

/* ---------- header ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);backdrop-filter:blur(6px);border-bottom:1px solid var(--steel2)}
.top-in{display:flex;align-items:center;gap:28px;padding:8px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-stretch:88%;font-size:22px;color:var(--ink);letter-spacing:-.01em}
.brand img{border-radius:50%}
.menu{display:flex;gap:26px;margin-left:auto;font-weight:600;font-size:15.5px}
.menu a{padding:6px 0;border-bottom:2px solid transparent;color:var(--ink2)}
.menu a:hover{border-color:var(--call)}
.top-call{display:flex;align-items:center;gap:9px;background:var(--ink);color:#fff;padding:11px 18px;border-radius:6px;font-weight:800;font-size:17px;white-space:nowrap}
.top-call svg{width:20px;height:20px}
.top-call:hover{background:var(--ink2)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:16px 26px;border-radius:6px;border:0;font:800 17px/1.1 var(--font);cursor:pointer;color:#fff;transition:background .18s,transform .18s}
.btn svg{width:22px;height:22px}
.btn:hover{transform:translateY(-1px)}
.btn-call{background:var(--call)}.btn-call:hover{background:var(--call-h)}
.btn-wa{background:var(--wa)}.btn-wa:hover{background:var(--wa-h)}
.btn-ghost{background:transparent;color:#fff;box-shadow:inset 0 0 0 2px rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn:disabled{opacity:.7;cursor:wait}

/* ---------- hero ---------- */
.hero{position:relative;color:#fff;padding:64px 0 76px;background:
  var(--rib),
  linear-gradient(100deg,rgba(11,31,58,.97) 0%,rgba(11,31,58,.9) 42%,rgba(11,31,58,.62) 100%),
  url(../img/hero.webp) center right/cover no-repeat,var(--ink)}
.hero-in{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.kicker{color:#ffc29b;font-weight:700;font-size:16px;margin-bottom:14px}
.hero h1{color:#fff;font-size:clamp(40px,5.6vw,76px);margin-bottom:20px;max-width:14ch;font-stretch:78%;font-weight:850}
.lead{color:#dbe6f3;font-size:clamp(17px,1.5vw,20px);max-width:54ch;margin-bottom:28px}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px}
.facts{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:30px;padding-top:22px;border-top:1px solid rgba(255,255,255,.22)}
.facts li{color:#fff;font-weight:600;font-size:15.5px;padding-left:22px;position:relative}
.facts li::before{content:"";position:absolute;left:0;top:.5em;width:12px;height:12px;border-radius:2px;background:var(--call)}
.hero-copy>*{animation:rise .7s both}
.hero-copy>*:nth-child(2){animation-delay:.08s}.hero-copy>*:nth-child(3){animation-delay:.16s}.hero-copy>*:nth-child(4){animation-delay:.24s}.hero-copy>*:nth-child(5){animation-delay:.32s}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

.ribs{height:18px;background:repeating-linear-gradient(90deg,var(--steel2) 0 3px,#fff 3px 6px,var(--zinc) 6px 8px,#fff 8px 16px)}

/* ---------- form ---------- */
.quote{background:#fff;color:var(--text);border-radius:8px;padding:28px 26px;box-shadow:0 28px 60px rgba(0,0,0,.4);border-top:6px solid var(--call)}
.quote h2{font-size:30px}
.q-sub{margin:4px 0 16px;font-size:15.5px}
.qf{display:grid;gap:13px}
.qf label{display:block;font-size:14px;font-weight:700;color:var(--ink)}
.qf input,.qf select,.qf textarea{display:block;width:100%;margin-top:5px;padding:13px 13px;border:1.5px solid var(--steel2);border-radius:6px;font:16px var(--font);color:var(--text);background:var(--steel)}
.qf input:focus,.qf select:focus,.qf textarea:focus{outline:0;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(11,111,208,.18)}
.qf textarea{resize:vertical;min-height:64px}
.qf .two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.qf .opt{font-weight:400;color:var(--muted)}
.qf .btn{width:100%;padding:17px;font-size:18px}
.fine{font-size:12.5px;text-align:center}.fine a{text-decoration:underline}
.alert{background:#fdecec;color:#9b1c1c;border:1px solid #f1b3b3;border-radius:6px;padding:10px 12px;font-size:14.5px;font-weight:600}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;opacity:0}

/* ---------- sections ---------- */
.sec{padding:84px 0}
.sec.steel{background:var(--steel)}
.sec.dark{background:var(--rib),var(--ink);color:#fff}
.sec.dark h2,.sec.dark h3{color:#fff}.sec.dark p{color:#c6d4e6}
.head{max-width:700px;margin:0 0 40px}
.head p{margin-top:12px;font-size:18px}
.head.left{margin-bottom:0}
.head a,.faq a,.alt-ph a{color:var(--blue);font-weight:700;text-decoration:underline}

/* products */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.item{background:#fff;border:1px solid var(--steel2);border-radius:4px;overflow:hidden;display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s}
.item:hover{box-shadow:0 16px 36px rgba(11,31,58,.14);transform:translateY(-3px)}
.item img{width:100%;aspect-ratio:4/3;object-fit:cover;background:var(--steel)}
.item-b{padding:20px 22px 22px;display:flex;flex-direction:column;gap:8px;flex:1;border-top:4px solid var(--ink)}
.item p{font-size:15.5px;flex:1}
.more{display:inline-block;align-self:flex-start;margin-top:8px;font-weight:800;color:var(--call);border-bottom:2px solid currentColor;padding-bottom:1px}
.more:hover{color:var(--call-h)}

/* feature rows */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.feature.rev .feature-txt{order:0}
.feature-img img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:4px;box-shadow:0 22px 50px rgba(11,31,58,.25)}
.sec.steel .feature-img img{background:#fff}
.feature-txt h2{margin-bottom:16px}
.feature-txt>p{font-size:18px;margin-bottom:20px}
.tick-list{display:grid;gap:11px;margin-bottom:28px}
.tick-list li{position:relative;padding-left:32px;font-weight:600;color:var(--ink)}
.sec.dark .tick-list li{color:#fff}
.tick-list li::before{content:"";position:absolute;left:0;top:3px;width:20px;height:20px;border-radius:50%;background:var(--call) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23fff' d='M9.2 16.2 4.8 11.8l-1.4 1.4 5.8 5.8L21 7.2l-1.4-1.4z'/%3E%3C/svg%3E") center/14px no-repeat}

/* calculator */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.calc-copy p{margin-top:14px;font-size:18px;max-width:46ch}
.calc-box{background:var(--steel);border:1px solid var(--steel2);border-top:6px solid var(--ink);border-radius:6px;padding:28px;display:grid;gap:22px}
.calc-in{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.calc-in label{font-weight:700;color:var(--ink);font-size:14.5px}
.calc-in input{display:block;width:100%;margin-top:5px;padding:14px;font:700 22px var(--font);border:1.5px solid var(--steel2);border-radius:6px;background:#fff;color:var(--ink)}
.calc-in input:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 3px rgba(11,111,208,.18)}
.calc-out{display:flex;align-items:center;gap:20px;background:var(--ink);color:#fff;border-radius:6px;padding:20px 22px}
.cyl{width:96px;height:96px;flex:none}
.litres{font-size:clamp(40px,5vw,56px);font-weight:850;font-stretch:80%;line-height:1;font-variant-numeric:tabular-nums}
.unit{color:#c6d4e6;font-size:15px;margin-top:6px}

/* uses */
.uses{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:2px solid var(--ink)}
.uses li{padding:22px 18px 22px 0;border-bottom:1px solid var(--steel2);font-weight:700;color:var(--ink);font-size:18px;font-stretch:90%}
.uses li:nth-child(4n+2),.uses li:nth-child(4n+3),.uses li:nth-child(4n){padding-left:18px;border-left:1px solid var(--steel2)}

/* why */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:0 40px}
.why>div{padding:24px 0 30px;border-top:2px solid var(--ink)}
.why h3{margin-bottom:8px}
.why p{font-size:16px}

/* process */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-bottom:46px}
.steps li{position:relative;padding-top:22px;border-top:2px solid rgba(255,255,255,.3)}
.steps span{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--call);color:#fff;font-weight:800;font-size:19px;margin-bottom:12px}
.steps h3{margin-bottom:6px}
.brief{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);border-radius:6px;padding:26px 28px}
.brief h3{margin-bottom:14px}
.brief ul{display:grid;grid-template-columns:repeat(3,1fr);gap:10px 28px}
.brief li{color:#fff;font-weight:600;padding-left:20px;position:relative}
.brief li::before{content:"";position:absolute;left:0;top:.55em;width:10px;height:10px;background:var(--call);border-radius:2px}

/* faq */
.faq-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:64px;align-items:start}
.faq-wrap .head{position:sticky;top:100px}
details{border-bottom:1px solid var(--steel2)}
details:first-child{border-top:2px solid var(--ink)}
summary{cursor:pointer;font-weight:700;color:var(--ink);padding:20px 40px 20px 0;list-style:none;position:relative;font-size:18px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:4px;top:14px;font-size:30px;font-weight:400;color:var(--call);line-height:1}
details[open] summary::after{content:"–"}
details p{padding:0 0 22px;max-width:60ch}

/* final */
.final{background:var(--rib),linear-gradient(135deg,var(--ink),var(--ink2));padding:84px 0;color:#fff}
.final-in{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.final h2{color:#fff;margin-bottom:14px}
.final p{color:#d6e2f1;font-size:18px;margin-bottom:24px}
.final .alt-ph{margin:20px 0 0;font-size:16px}.final .alt-ph a{color:#fff}
.quote-s h2{color:var(--ink);margin-bottom:12px;font-size:28px}

/* footer */
.foot{background:#071427;color:#a7b8cf;padding:44px 0 36px;font-size:15px}
.foot-in{display:grid;gap:14px;max-width:760px}
.foot .brand{color:#fff;font-size:20px}
.foot p{color:#a7b8cf}
.foot-l{display:flex;flex-wrap:wrap;gap:8px 24px;font-weight:600}.foot-l a:hover{color:#fff}
.foot small{color:#7f93ae}

/* ---------- sticky call + whatsapp ---------- */
.dock{position:fixed;z-index:90;right:20px;bottom:22px;display:flex;flex-direction:column;gap:12px}
.dock a{display:flex;align-items:center;gap:12px;height:60px;padding:0 24px 0 18px;border-radius:999px;color:#fff;font-weight:800;font-size:18px;box-shadow:0 10px 26px rgba(0,0,0,.32);position:relative}
.dock svg{width:28px;height:28px}
.dock-call{background:var(--call)}.dock-call:hover{background:var(--call-h)}
.dock-wa{background:var(--wa)}.dock-wa:hover{background:var(--wa-h)}
.dock a::after{content:"";position:absolute;inset:0;border-radius:inherit;box-shadow:0 0 0 0 currentColor;opacity:.5;animation:ping 2.6s ease-out infinite}
.dock-call::after{color:var(--call)}.dock-wa::after{color:var(--wa);animation-delay:1.3s}
@keyframes ping{0%{box-shadow:0 0 0 0 currentColor;opacity:.55}70%,100%{box-shadow:0 0 0 16px currentColor;opacity:0}}

/* thank-you / privacy */
.ty{background:var(--steel);min-height:100vh}
.ty-box{max-width:620px;margin:0 auto;padding:60px 20px;text-align:center;display:grid;gap:18px;justify-items:center}
.ty-box h1{font-size:clamp(30px,5vw,42px)}
.ty-box a:not(.btn){color:var(--blue);font-weight:700}
.ty .hero-btns{justify-content:center}
.doc{max-width:760px;margin:0 auto;padding:40px 20px 70px;background:#fff;min-height:100vh}
.doc h1{margin:14px 0 10px}.doc h2{font-size:22px;margin:24px 0 6px}.doc a{color:var(--blue);font-weight:700}.muted{margin-top:26px;font-size:13px}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .menu{display:none}.top-call{margin-left:auto}
  .hero-in,.feature,.calc,.final-in,.faq-wrap{grid-template-columns:1fr;gap:36px}
  .hero h1{max-width:none}
  .grid{grid-template-columns:repeat(2,1fr)}
  .why{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .feature.rev .feature-img{order:-1}
  .faq-wrap .head{position:static}
  .uses{grid-template-columns:repeat(2,1fr)}
  .uses li,.uses li:nth-child(n){padding:20px 14px 20px 0;border-left:0}
  .uses li:nth-child(2n){padding-left:16px;border-left:1px solid var(--steel2)}
}
@media (max-width:640px){
  body{font-size:16.5px;padding-bottom:calc(64px + env(safe-area-inset-bottom))}
  .brand{font-size:19px}.brand img{width:40px;height:40px}
  .top-call span{display:none}.top-call{padding:11px 13px;border-radius:50%;background:var(--call)}.top-call svg{width:22px;height:22px}
  .hero{padding:38px 0 48px}
  .hero-btns .btn{flex:1 1 100%}
  .sec,.final{padding:56px 0}
  .grid,.why,.steps,.brief ul{grid-template-columns:1fr}
  .qf .two,.calc-in{grid-template-columns:1fr}
  .quote{padding:24px 18px}
  .calc-box{padding:20px 16px}.cyl{width:72px;height:72px}
  .calc-out{padding:16px}
  .uses li{font-size:16px}
  /* mobile dock: full-width bottom bar */
  .dock{left:0;right:0;bottom:0;flex-direction:row;gap:0;padding-bottom:env(safe-area-inset-bottom);background:var(--ink);box-shadow:0 -6px 20px rgba(0,0,0,.28)}
  .dock a{flex:1;height:64px;border-radius:0;justify-content:center;box-shadow:none;padding:0 8px;font-size:18px}
  .dock a::after{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}