/* Layout idea: a calm single column of full-width bands; the flow gauge (before/after L/min) is the recurring visual motif. */
:root{
  --paper:#f3f6f5; --surface:#ffffff; --ink:#0c2a31; --muted:#51696e; --line:#d5dfdd;
  --water:#0b6f7d; --water-soft:#dcecec; --brass:#8a5f24; --ok:#1d7a4f; --err:#b3372e;
  --on-water:#ffffff;
  --display:"Bricolage Grotesque","IBM Plex Sans Arabic",system-ui,sans-serif;
  --body:"Instrument Sans","IBM Plex Sans Arabic",system-ui,-apple-system,"Segoe UI",sans-serif;
  --r:14px; --max:1120px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#081c21; --surface:#0f2a31; --ink:#e9f1f0; --muted:#9fb5b8; --line:#23434a;
    --water:#5cc3cf; --water-soft:#143941; --brass:#d9a85c; --ok:#5fcf98; --err:#f08a80;
    --on-water:#06222a; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#081c21; --surface:#0f2a31; --ink:#e9f1f0; --muted:#9fb5b8; --line:#23434a;
  --water:#5cc3cf; --water-soft:#143941; --brass:#d9a85c; --ok:#5fcf98; --err:#f08a80;
  --on-water:#06222a; color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--display);line-height:1.08;margin:0;text-wrap:balance;letter-spacing:-.01em}
[dir="rtl"] h1,[dir="rtl"] h2,[dir="rtl"] h3{letter-spacing:0;line-height:1.3}
h1{font-size:clamp(2.2rem,5.4vw,4rem);font-weight:700}
h2{font-size:clamp(1.6rem,3.2vw,2.4rem);font-weight:700}
h3{font-size:1.2rem;font-weight:700}
p{margin:0}
a{color:var(--water)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
section{padding:72px 0}
.lede{color:var(--muted);max-width:60ch;font-size:1.1rem}
.eyebrow{font-size:.8rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--brass)}
[dir="rtl"] .eyebrow{letter-spacing:0}
.stack{display:flex;flex-direction:column;gap:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:0 24px;border-radius:999px;border:1.5px solid var(--water);background:var(--water);color:var(--on-water);font:600 1rem var(--body);text-decoration:none;cursor:pointer}
.btn.ghost{background:transparent;color:var(--water)}
.btn:hover{filter:brightness(1.08)}
:focus-visible{outline:3px solid var(--brass);outline-offset:2px}

/* header */
header{position:sticky;top:0;z-index:5;background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px;flex-wrap:wrap;padding-block:8px}
.logo{display:flex;align-items:center;gap:10px;font:700 1.35rem var(--display);color:var(--ink);text-decoration:none}
.logo svg{width:auto;height:34px}
.bar-right{display:flex;align-items:center;gap:12px}
.langs{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.langs button{border:0;background:transparent;color:var(--muted);font:600 .85rem var(--body);padding:8px 12px;cursor:pointer}
.langs button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.bar .btn{min-height:42px;padding:0 18px;font-size:.95rem}

/* hero */
.hero{padding:64px 0 56px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.assure{display:flex;flex-wrap:wrap;gap:8px 20px;color:var(--muted);font-size:.95rem;list-style:none;padding:0;margin:0}
.assure li{display:flex;align-items:center;gap:8px}
.assure li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brass);flex:none}
.gauge{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:28px;display:flex;flex-direction:column;gap:22px}
.gauge-row{display:flex;flex-direction:column;gap:8px}
.gauge-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.gauge-head b{font:700 2rem var(--display);font-variant-numeric:tabular-nums}
.gauge-head small{color:var(--muted);font-size:.9rem}
.track{height:14px;border-radius:999px;background:var(--water-soft);overflow:hidden}
.fill{height:100%;border-radius:999px;background:var(--muted)}
.fill.after{background:var(--water)}
.gauge .note{font-size:.85rem;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}

/* bands */
.band{background:var(--surface);border-block:1px solid var(--line)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;display:flex;flex-direction:column;gap:8px;padding-top:18px;border-top:2px solid var(--ink)}
.steps li::before{content:"0" counter(s);font:700 .95rem var(--display);color:var(--brass);font-variant-numeric:tabular-nums}
.steps p{color:var(--muted)}

/* calculator */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:stretch}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:28px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:600;font-size:.95rem}
.field output{font-variant-numeric:tabular-nums;color:var(--water);font-weight:600}
.field .row{display:flex;justify-content:space-between;gap:12px}
input[type=range]{width:100%;accent-color:var(--water)}
.result{background:var(--ink);color:var(--paper);border-radius:var(--r);padding:28px;display:flex;flex-direction:column;gap:18px;justify-content:center}
.result .big{font:700 clamp(2.4rem,6vw,3.6rem) var(--display);font-variant-numeric:tabular-nums;line-height:1}
.result dl{display:grid;grid-template-columns:1fr auto;gap:8px 16px;margin:0;font-variant-numeric:tabular-nums}
.result dt{opacity:.75}.result dd{margin:0;font-weight:600;text-align:end}
.result small{opacity:.7;font-size:.85rem}

/* kits */
.kits{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.kit{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px;display:flex;flex-direction:column;gap:14px}
.kit.hero-kit{border:2px solid var(--water)}
.tag{align-self:flex-start;font-size:.75rem;font-weight:600;padding:4px 10px;border-radius:999px;background:var(--water-soft);color:var(--water)}
.kit .for{color:var(--muted);font-size:.95rem}
.kit ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:6px;font-size:.97rem;flex:1}
.kit li{display:flex;gap:10px}
.kit li::before{content:"+";color:var(--brass);font-weight:700}
.price{font:700 2rem var(--display);font-variant-numeric:tabular-nums}
.price small{font:500 .9rem var(--body);color:var(--muted)}
.ship{font-size:.85rem;color:var(--muted)}

/* order */
.order{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start}
form{display:flex;flex-direction:column;gap:18px}
fieldset{border:0;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
legend{font:700 1.05rem var(--display);padding:0;margin-bottom:10px}
.opt{display:flex;align-items:center;gap:12px;padding:14px 16px;border:1.5px solid var(--line);border-radius:12px;background:var(--surface);cursor:pointer}
.opt:has(input:checked){border-color:var(--water);background:var(--water-soft)}
.opt input{accent-color:var(--water);width:18px;height:18px;flex:none}
.opt span{flex:1}
.opt b{font-variant-numeric:tabular-nums;white-space:nowrap}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.txt{display:flex;flex-direction:column;gap:6px}
.txt label{font-weight:600;font-size:.92rem}
.txt input,.txt select,.txt textarea{font:inherit;color:var(--ink);background:var(--surface);border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;min-height:48px;width:100%}
.txt input:focus,.txt select:focus,.txt textarea:focus{border-color:var(--water);outline:none}
.err{color:var(--err);font-size:.88rem;min-height:1.2em}
.summary{position:sticky;top:88px}
.summary dl{display:grid;grid-template-columns:1fr auto;gap:10px 16px;margin:0;font-variant-numeric:tabular-nums}
.summary dd{margin:0;text-align:end;font-weight:600}
.summary .total{border-top:1px solid var(--line);padding-top:12px;font:700 1.5rem var(--display)}
.done{border:2px solid var(--ok);border-radius:var(--r);padding:22px;background:var(--surface);display:flex;flex-direction:column;gap:12px}
.done pre{white-space:pre-wrap;font:inherit;font-size:.95rem;margin:0;padding:14px;background:var(--paper);border-radius:10px;overflow-wrap:anywhere}
.preview-note{font-size:.88rem;color:var(--brass);font-weight:600}
[hidden]{display:none!important}

/* b2b */
.b2b{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.segs{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;list-style:none;padding:0;margin:0}
.segs li{background:var(--surface);padding:16px 18px;display:flex;flex-direction:column;gap:2px}
.segs b{font-family:var(--display)}
.segs span{color:var(--muted);font-size:.9rem}

/* faq */
details{border-bottom:1px solid var(--line);padding:16px 0}
summary{font:700 1.05rem var(--display);cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::after{content:"+";color:var(--brass)}
details[open] summary::after{content:"–"}
details p{color:var(--muted);margin-top:10px;max-width:65ch}
footer{padding:36px 0;color:var(--muted);font-size:.9rem;border-top:1px solid var(--line)}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

@media (max-width:860px){
  section{padding:52px 0}
  .hero-grid,.calc,.order,.b2b{grid-template-columns:1fr}
  .kits,.steps{grid-template-columns:1fr}
  .summary{position:static}
}
@media (max-width:460px){.grid2,.segs{grid-template-columns:1fr}.bar .btn{display:none}}

/* --- v2 additions --- */
.products{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.product{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.product .art{background:linear-gradient(180deg,var(--water-soft),var(--surface));padding:20px;display:flex;justify-content:center}
.product .art svg{width:100%;max-width:300px;height:auto}
.product .txt2{padding:22px 24px 26px;display:flex;flex-direction:column;gap:8px}
.product .txt2 p{color:var(--muted)}
.product .unit{font:700 1.1rem var(--display);color:var(--water)}
.claim{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;list-style:none;padding:0;margin:0}
.claim li{display:flex;flex-direction:column;gap:6px;border-top:2px solid var(--ink);padding-top:16px}
.claim p{color:var(--muted)}
.kits.four{grid-template-columns:repeat(3,1fr)}
.hero-art{display:flex;flex-direction:column;gap:16px}
.hero-art .pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hero-art .pair div{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:10px}
.hero-art svg{width:100%;height:auto;display:block}
.offerline{font:700 1.25rem var(--display)}
.offerline span{color:var(--water)}
.wa{display:inline-flex;align-items:center;gap:8px;font-weight:600}
.metal{fill:url(#mt)} .metal2{fill:url(#mt2)}
@media (max-width:860px){.products,.claim,.kits.four{grid-template-columns:1fr}}
.qty{display:flex;align-items:center;gap:14px;padding:14px 16px;border:1.5px solid var(--line);border-radius:12px;background:var(--surface)}
.qty .who{flex:1;display:flex;flex-direction:column}
.qty .who small{color:var(--muted);font-size:.88rem}
.qty .step{display:flex;align-items:center;border:1.5px solid var(--line);border-radius:999px;overflow:hidden;direction:ltr}
.qty button{width:42px;height:42px;border:0;background:transparent;color:var(--water);font:700 1.3rem var(--body);cursor:pointer}
.qty input{width:44px;height:42px;border:0;background:transparent;color:var(--ink);text-align:center;font:600 1.05rem var(--body);font-variant-numeric:tabular-nums;-moz-appearance:textfield}
.qty input::-webkit-outer-spin-button,.qty input::-webkit-inner-spin-button{-webkit-appearance:none}
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tiers div{background:var(--surface);padding:10px 12px;display:flex;flex-direction:column}
.tiers small{color:var(--muted);font-size:.82rem}
.tiers b{font-variant-numeric:tabular-nums}
.tier-h{font-size:.88rem;color:var(--muted);font-weight:600}
.nudge{font-size:.92rem;font-weight:600;color:var(--water);min-height:1.4em}
.nudge.warn{color:var(--brass)}
.btn:disabled{opacity:.45;cursor:not-allowed}
img.shot{width:100%;height:auto;display:block;border-radius:10px}
.product .art{position:relative;padding:0}
.product .art img.shot{border-radius:0;max-width:none}
.swatches{position:absolute;bottom:14px;inset-inline-end:14px;display:flex;gap:8px;background:var(--surface);padding:6px;border-radius:999px;border:1px solid var(--line)}
.sw{width:26px;height:26px;border-radius:50%;border:2px solid var(--line);cursor:pointer;padding:0;display:inline-block;flex:none}
.sw.inox{background:linear-gradient(135deg,#f4f7f7,#9fb0b3)}.sw.black{background:linear-gradient(135deg,#3a4144,#0b0d0e)}
.sw[aria-pressed="true"]{border-color:var(--water);box-shadow:0 0 0 2px var(--water-soft)}
.hero-art .pair div{padding:0;overflow:hidden}
.tech{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}
.tech-art{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.tech-art img{width:100%;height:auto;display:block}
.badges{display:flex;flex-wrap:wrap;gap:8px}
.badge{font-size:.82rem;font-weight:600;padding:6px 12px;border-radius:999px;border:1.5px solid var(--brass);color:var(--brass)}
.parts{margin:0;padding:0;list-style:none;counter-reset:p;display:flex;flex-direction:column;gap:10px}
.parts li{counter-increment:p;display:flex;gap:12px;align-items:baseline;border-bottom:1px solid var(--line);padding-bottom:10px}
.parts li::before{content:counter(p);font:700 .9rem var(--display);color:var(--on-water);background:var(--water);width:24px;height:24px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;flex:none}
.vid{display:grid;grid-template-columns:1fr minmax(0,380px);gap:48px;align-items:center}
.vid video{width:100%;height:auto;border-radius:var(--r);border:1px solid var(--line);background:#f3f6f5;display:block}
.finish{display:grid;grid-template-columns:auto 1fr 1fr;gap:10px;align-items:center}
.finish .opt{padding:10px 14px}
@media (max-width:860px){.tech,.vid{grid-template-columns:1fr}.finish{grid-template-columns:1fr 1fr}.finish .tier-h{grid-column:1/-1}}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gallery div{border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.gallery img.shot{border-radius:0}
.gal-head{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.swatches.inline{position:static}
@media (max-width:640px){.gallery{grid-template-columns:1fr 1fr}.gallery div:last-child{grid-column:1/-1}}
.sent,.fail{margin:0;font-weight:600}.sent{color:var(--ok)}.fail{color:var(--err)}
.sticky{display:none}
@media (max-width:860px){
  .sticky{display:flex;position:fixed;left:12px;right:12px;bottom:12px;z-index:20;justify-content:center;min-height:56px;border-radius:999px;background:var(--water);color:var(--on-water);font:700 1.05rem var(--body);text-decoration:none;align-items:center;box-shadow:0 6px 24px rgba(12,42,49,.25);transition:transform .25s,opacity .25s}
  .sticky.off{transform:translateY(120%);opacity:0;pointer-events:none}
  body{padding-bottom:80px}
  .qty button{width:48px;height:48px}.qty input{height:48px}
  .txt input,.txt select{font-size:16px}
}
section[id]{scroll-margin-top:72px}
.done .sent{font-size:1.15rem;line-height:1.45}

.qty .thumb{width:64px;height:64px;flex:0 0 64px;border-radius:10px;object-fit:cover;background:#fff;border:1px solid var(--line)}
.qnote{margin:2px 0 0;font-size:.9rem;color:var(--muted)}
.qty{flex-wrap:wrap}
.qty .who{flex:1 1 calc(100% - 92px);min-width:0}
.qty .step{margin-inline-start:auto}
.qty .thumb{width:72px;height:72px;flex-basis:72px}

.wa-alt{display:flex;flex-direction:column;align-items:stretch;gap:8px;margin:4px 0 14px;text-align:center}
.wa-alt>span{font-size:.9rem;color:var(--muted)}
.btn.wa{background:#1fa855;border-color:#1fa855;color:#fff;display:flex;align-items:center;justify-content:center;gap:10px}
.btn.wa:hover{background:#178a45}
.wa-alt small{color:var(--muted)}
/* real product photos, specs, numbers, pro range, 3D */
.product .art{min-height:300px;align-items:center}
.product .art img.real{width:auto;max-width:72%;max-height:280px;height:auto;margin:24px auto;filter:drop-shadow(0 18px 24px rgba(10,40,70,.18))}
.specs{margin:6px 0 4px;padding:0;list-style:none;display:flex;flex-direction:column;gap:6px;font-size:.92rem}
.specs li{display:flex;gap:8px;align-items:baseline}
.specs li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--water);flex:none;transform:translateY(-2px)}
.tech-art{position:relative;aspect-ratio:7/8;background:radial-gradient(120% 90% at 50% 30%,var(--water-soft),var(--surface))}
.tech-art img.real-tech{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;transition:opacity .4s}
.tech-art canvas.tech3d{position:absolute;inset:0;width:100%!important;height:100%!important}
.nums{list-style:none;margin:40px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.nums li{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px 22px;display:flex;flex-direction:column;gap:6px}
.nums b{font:700 clamp(1.5rem,3.2vw,2.1rem)/1.1 var(--display);color:var(--water)}
.nums span{color:var(--muted);font-size:.92rem}
@media (max-width:760px){.nums{grid-template-columns:1fr}}
.pro-range{display:flex;flex-direction:column;gap:12px;border-top:1px solid var(--line);padding-top:18px}
.pro-range h3{margin:0}
.pr-item{display:flex;gap:14px;align-items:center}
.pr-item img{width:76px;height:76px;object-fit:contain;flex:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px}
.pr-item div{display:flex;flex-direction:column;gap:2px}
.pr-item small{color:var(--muted)}
.qty .thumb{object-fit:contain;padding:4px}
.trial{margin:0;padding:12px 16px;border-radius:12px;background:var(--water-soft);color:var(--ink);font-weight:600}