/* Napitel Diamond — static site
   Palette (color wheel): base gold #B4A064 (hue 48°, brand), action navy #243060 (hue 228°, complement),
   neutral warm charcoal #1F1C17 for text. Light backgrounds only; gold is an accent (lines, icons, numbers). */
:root{
  --bg:#FFFFFF; --bg-alt:#F7F5EF; --bg-deep:#EFEBE0;
  --ink:#1F1C17; --ink-soft:#57524A; --line:#E4DFD2;
  --gold:#B4A064; --gold-deep:#7A6A2C; --gold-soft:#E9E1C8;
  --navy:#243060; --navy-hover:#18214A;
  --radius:14px; --shadow:0 18px 50px -24px rgba(31,28,23,.28);
  --serif:"Playfair Display",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --wrap:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.65 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,video{max-width:100%;display:block}
a{color:var(--navy)}
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2.3rem,5.4vw,4.1rem)}
h2{font-size:clamp(1.9rem,3.6vw,2.8rem)}
h3{font-size:1.35rem}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.sec{padding:clamp(64px,9vw,120px) 0}
.sec.alt{background:var(--bg-alt)}
.label{display:flex;align-items:center;gap:10px;font:600 .78rem/1 var(--sans);letter-spacing:.18em;text-transform:uppercase;color:var(--gold-deep);margin-bottom:18px}
.label svg{width:18px;height:18px;flex:none;color:var(--gold)}
.lead{font-size:1.15rem;color:var(--ink-soft);max-width:640px}
.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto}.center .label{justify-content:center}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 28px;border-radius:999px;font:600 1rem/1 var(--sans);text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .2s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--navy-hover)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn svg{width:18px;height:18px}

/* header */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.top.scrolled{border-bottom-color:var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.logo img{height:40px;width:auto}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:var(--ink);text-decoration:none;font-weight:500;font-size:.95rem}
.nav a:hover{color:var(--gold-deep)}
.nav .btn{padding:11px 20px;font-size:.92rem;color:#fff}
.burger{display:none;background:none;border:0;padding:8px;cursor:pointer;color:var(--ink)}
.burger svg{width:28px;height:28px}
@media (max-width:860px){
  .burger{display:block}
  .nav{position:fixed;inset:72px 0 auto 0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:8px 20px 24px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);transform:translateY(-8px);opacity:0;pointer-events:none;transition:.2s}
  .nav.open{transform:none;opacity:1;pointer-events:auto}
  .nav a{padding:14px 0;border-bottom:1px solid var(--line);font-size:1.05rem}
  .nav .btn{margin-top:16px;border-bottom:0;padding:15px}
}

/* hero */
.hero{position:relative;padding:clamp(40px,6vw,80px) 0 clamp(56px,8vw,100px);background:linear-gradient(180deg,#fff 0%,var(--bg-alt) 100%);overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,64px);align-items:center}
.hero h1 em{font-style:italic;color:var(--gold-deep)}
.hero .lead{margin-bottom:30px}
.hero .ctas{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.hero-media{position:relative;border-radius:22px;overflow:hidden;box-shadow:var(--shadow);background:var(--bg-deep);aspect-ratio:4/5}
.hero-media video,.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media .ring{position:absolute;inset:14px;border:1px solid rgba(255,255,255,.55);border-radius:14px;pointer-events:none}
.proof{display:flex;flex-wrap:wrap;gap:22px 34px;color:var(--ink-soft);font-size:.93rem}
.proof span{display:flex;align-items:center;gap:8px}
.proof svg{width:18px;height:18px;color:var(--gold)}
@media (max-width:860px){.hero .wrap{grid-template-columns:1fr}.hero-media{aspect-ratio:4/4.3;order:-1}}

/* stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{padding:34px 24px;text-align:center}
.stat+.stat{border-left:1px solid var(--line)}
.stat b{display:block;font:600 clamp(2.4rem,5vw,3.4rem)/1 var(--serif);color:var(--ink)}
.stat b small{font-size:.55em;color:var(--gold-deep)}
.stat span{display:block;margin-top:10px;color:var(--ink-soft);font-size:.95rem}
@media (max-width:640px){.stats{grid-template-columns:1fr}.stat+.stat{border-left:0;border-top:1px solid var(--line)}}
.note{font-size:.8rem;color:var(--ink-soft);margin-top:14px}

/* feature grid */
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media (max-width:900px){.g3{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.g3,.g2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px}
.sec.alt .card{background:#fff}
.card .num{font:600 .85rem/1 var(--sans);letter-spacing:.14em;color:var(--gold-deep);margin-bottom:18px;display:block}
.card .ico{width:46px;height:46px;border-radius:12px;background:var(--gold-soft);display:grid;place-items:center;margin-bottom:18px;color:var(--gold-deep)}
.card .ico svg{width:24px;height:24px}
.card p{color:var(--ink-soft);margin:0}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.split.rev>:first-child{order:2}
@media (max-width:860px){.split{grid-template-columns:1fr}.split.rev>:first-child{order:0}}
.media-frame{border-radius:20px;overflow:hidden;box-shadow:var(--shadow);background:var(--bg-deep)}
.media-frame img,.media-frame video{width:100%;height:auto}
.ticks{list-style:none;padding:0;margin:0 0 26px}
.ticks li{position:relative;padding:10px 0 10px 36px;border-bottom:1px solid var(--line)}
.ticks li:last-child{border-bottom:0}
.ticks li svg{position:absolute;left:0;top:13px;width:20px;height:20px;color:var(--gold)}

/* steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}
.step{padding-top:22px;border-top:2px solid var(--gold)}
.step .num{font:600 2.2rem/1 var(--serif);color:var(--gold-deep);display:block;margin-bottom:12px}
.step p{color:var(--ink-soft);margin:0}

/* models */
.models{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
@media (max-width:960px){.models{grid-template-columns:1fr;max-width:560px;margin:0 auto}}
.model{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}
.model.featured{border-color:var(--gold);box-shadow:0 0 0 1px var(--gold),var(--shadow)}
.model .flag{position:absolute;top:16px;left:16px;font:600 .72rem/1 var(--sans);letter-spacing:.16em;text-transform:uppercase;color:var(--gold-deep);background:#fff;padding:8px 10px;border-radius:6px}
.model .pic{aspect-ratio:1/1;background:var(--bg-alt);display:grid;place-items:center;padding:22px}
.model .pic img{width:100%;height:100%;object-fit:contain}
.model .body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1}
.model .body p{color:var(--ink-soft);font-size:.97rem}
.price{font:600 2.2rem/1 var(--serif);margin:6px 0 4px}
.price small{font:500 .85rem/1 var(--sans);color:var(--ink-soft);margin-left:6px}
.model ul{list-style:none;padding:0;margin:14px 0 24px;flex:1}
.model li{position:relative;padding:7px 0 7px 28px;font-size:.95rem}
.model li svg{position:absolute;left:0;top:10px;width:17px;height:17px;color:var(--gold)}
.model .btn{width:100%}

/* specs */
.spec{width:100%;border-collapse:collapse;font-size:.97rem;background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.spec th,.spec td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
.spec th{font-weight:500;color:var(--ink-soft);width:42%}
.spec thead th{font-weight:600;color:var(--ink);background:var(--bg-alt)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.gallery a{display:block;border-radius:12px;overflow:hidden;aspect-ratio:1/1;background:var(--bg-deep)}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.gallery a:hover img{transform:scale(1.04)}
.gallery a.wide{grid-column:span 2;aspect-ratio:2/1}
@media (max-width:760px){.gallery{grid-template-columns:1fr 1fr}.gallery a.wide{grid-column:span 2}}

/* video */
.vid{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);background:#000}
.vid video{width:100%;height:auto}
.vids{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:760px){.vids{grid-template-columns:1fr}}
.vids figure{margin:0}
.vids figcaption{font-size:.92rem;color:var(--ink-soft);margin-top:10px}

/* faq */
.faq{max-width:820px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{list-style:none;cursor:pointer;padding:20px 40px 20px 0;font:600 1.08rem/1.4 var(--sans);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:6px;top:50%;width:12px;height:12px;border-right:2px solid var(--gold-deep);border-bottom:2px solid var(--gold-deep);transform:translateY(-70%) rotate(45deg);transition:transform .2s}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq details p{color:var(--ink-soft);padding:0 0 18px;margin:0}

/* contact */
.contact{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(28px,5vw,64px);align-items:start}
@media (max-width:860px){.contact{grid-template-columns:1fr}}
.form{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(22px,4vw,36px);box-shadow:var(--shadow)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){.form .row{grid-template-columns:1fr}}
.form label{display:block;font-weight:500;font-size:.9rem;margin:0 0 6px}
.form .f{margin-bottom:16px}
.form input,.form select,.form textarea{width:100%;font:400 16px/1.4 var(--sans);color:var(--ink);background:#fff;border:1px solid #D6D0C1;border-radius:10px;padding:13px 14px;transition:border-color .2s,box-shadow .2s}
.form textarea{min-height:120px;resize:vertical}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--navy);box-shadow:0 0 0 3px rgba(36,48,96,.15)}
.form .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form .btn{width:100%;margin-top:6px}
.form .small{font-size:.82rem;color:var(--ink-soft);margin-top:14px}
.form .msg{display:none;margin-top:16px;padding:14px 16px;border-radius:10px;font-weight:500}
.form .msg.ok{display:block;background:#EEF3E8;color:#2F4A1F}
.form .msg.err{display:block;background:#F8EAE7;color:#7A2616}
.contact-points{list-style:none;padding:0;margin:26px 0 0}
.contact-points li{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.contact-points svg{width:22px;height:22px;flex:none;color:var(--gold);margin-top:2px}

/* footer */
.foot{background:var(--bg-deep);padding:56px 0 34px;font-size:.93rem;color:var(--ink-soft)}
.foot .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
@media (max-width:760px){.foot .wrap{grid-template-columns:1fr}}
.foot img{height:38px;width:auto;margin-bottom:14px}
.foot h4{font:600 .78rem/1 var(--sans);letter-spacing:.16em;text-transform:uppercase;color:var(--ink);margin:6px 0 14px}
.foot a{color:var(--ink-soft);text-decoration:none;display:block;padding:4px 0}
.foot a:hover{color:var(--navy)}
.foot .legal{grid-column:1/-1;border-top:1px solid #DCD5C4;padding-top:22px;margin-top:10px;font-size:.85rem}

/* sticky mobile CTA */
.mcta{display:none}
@media (max-width:760px){
  .mcta{display:flex;position:fixed;left:12px;right:12px;bottom:12px;z-index:60;box-shadow:0 10px 30px -10px rgba(0,0,0,.4);transform:translateY(120%);transition:transform .25s}
  .mcta.show{transform:none}
}

/* reveal */
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* text pages */
.doc{max-width:780px;margin:0 auto;padding:60px 20px 90px}
.doc h1{font-size:clamp(2rem,4vw,2.8rem)}
.doc h2{font-size:1.4rem;margin-top:1.6em}
.doc p,.doc li{color:var(--ink-soft)}

/* ===== v2: product hero ===== */
.hero2 .wrap{grid-template-columns:1fr 1fr}
.hero-stage{position:relative;aspect-ratio:1/1.05}
.hero-stage .disc{position:absolute;inset:6% 4% 0 10%;border-radius:50%;background:radial-gradient(circle at 50% 40%,#fff 0%,var(--gold-soft) 70%,#E3D9BB 100%)}
.hero-stage .prod{position:absolute;left:24%;right:6%;bottom:0;top:0;width:auto;height:100%;object-fit:contain;mix-blend-mode:multiply;filter:drop-shadow(0 30px 30px rgba(31,28,23,.18))}
.hero-stage .bubble{position:absolute;left:0;bottom:6%;width:44%;aspect-ratio:1/1;border-radius:50%;overflow:hidden;border:6px solid #fff;box-shadow:var(--shadow);background:var(--bg-deep)}
.hero-stage .bubble video{width:100%;height:100%;object-fit:cover}
.hero-stage .tag{position:absolute;left:4%;bottom:0;transform:translateY(60%);font:600 .74rem/1 var(--sans);letter-spacing:.16em;text-transform:uppercase;color:var(--gold-deep);background:#fff;padding:9px 12px;border-radius:6px;box-shadow:0 6px 20px -8px rgba(0,0,0,.25);white-space:nowrap}
.hero-stage .spec-chip{position:absolute;right:0;top:12%;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;box-shadow:0 10px 30px -14px rgba(0,0,0,.3);font-size:.85rem;line-height:1.35}
.hero-stage .spec-chip b{display:block;font:600 1.5rem/1.1 var(--serif);color:var(--ink)}
@media (max-width:860px){.hero-stage{max-width:520px;margin:0 auto;width:100%}}

/* ===== v2: how svg ===== */
.howsvg{width:100%;height:auto;display:block}
.howsvg .hl{fill:none;stroke:url(#hair);stroke-width:2.3;stroke-linecap:round}
.howsvg .hs{fill:none;stroke:#4E3B26;stroke-width:1.7;stroke-linecap:round;transform-box:fill-box;transform-origin:50% 0}
.howsvg .hs-air{animation:blow 3.4s ease-in infinite}
.howsvg .hs-suck{animation:suck 3.4s cubic-bezier(.55,0,.8,.4) infinite}
@keyframes blow{0%,30%{transform:none;opacity:1}70%{opacity:.8}100%{transform:translate(-150px,40px) rotate(38deg);opacity:0}}
@keyframes suck{0%,30%{transform:none;opacity:1}85%{opacity:1}100%{transform:translate(150px,10px) scale(.5,.4);opacity:0}}
.howsvg .gust path{stroke:#C0583A;stroke-width:3;stroke-linecap:round;stroke-dasharray:14 12;fill:none;animation:gust 1s linear infinite}
.howsvg .flow path{stroke:var(--navy);stroke-width:3;stroke-linecap:round;stroke-dasharray:10 12;fill:none;animation:flow .9s linear infinite}
@keyframes gust{to{stroke-dashoffset:26}}
@keyframes flow{to{stroke-dashoffset:-22}}
.howsvg .cap{font:700 15px/1 Inter,Arial,sans-serif;letter-spacing:.16em;fill:#57524A}
.howsvg .cap.gold{fill:#7A6A2C}
.howsvg .cap2{font:400 14px/1 Inter,Arial,sans-serif;fill:#57524A}
@media (prefers-reduced-motion:reduce){.howsvg *{animation:none!important}}
.howbox{background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(10px,2vw,22px);box-shadow:var(--shadow)}

/* ===== v2: editorial benefits ===== */
.ed{display:grid;gap:clamp(40px,6vw,80px)}
.ed-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.ed-row:nth-child(even) .ed-img{order:2}
.ed-img{border-radius:20px;overflow:hidden;aspect-ratio:4/3.4;background:var(--bg-deep);box-shadow:var(--shadow)}
.ed-img img{width:100%;height:100%;object-fit:cover}
.ed-num{font:600 4.2rem/1 var(--serif);color:var(--gold);display:block;margin-bottom:6px}
.ed-kick{font:600 .78rem/1 var(--sans);letter-spacing:.18em;text-transform:uppercase;color:var(--gold-deep);margin-bottom:14px;display:block}
.ed-row h3{font-size:clamp(1.6rem,2.6vw,2.1rem);margin-bottom:.4em}
.ed-row p{color:var(--ink-soft)}
@media (max-width:860px){.ed-row{grid-template-columns:1fr}.ed-row:nth-child(even) .ed-img{order:0}}

/* ===== v2: comparison ===== */
.vs{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;font-size:1rem}
.vs th,.vs td{padding:18px 20px;text-align:left;border-bottom:1px solid var(--line)}
.vs tr:last-child td,.vs tr:last-child th{border-bottom:0}
.vs thead th{background:var(--bg-alt);font:600 .8rem/1.2 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft)}
.vs thead th.us{background:var(--ink);color:#fff}
.vs td.us{background:#FBF8EE;font-weight:600;color:var(--ink)}
.vs tbody th{font-weight:500;color:var(--ink-soft);width:34%}
.vs td{color:var(--ink-soft)}
@media (max-width:560px){.vs th,.vs td{padding:13px 12px;font-size:.9rem}}

/* ===== v3: premium components ===== */
/* hero fix: single column on mobile regardless of hero2 */
@media (max-width:860px){.hero.hero2 .wrap{grid-template-columns:1fr}.hero-stage{order:-1;aspect-ratio:1/1}.hero-stage .spec-chip{top:4%;right:2%;padding:10px 12px;font-size:.78rem}.hero-stage .spec-chip b{font-size:1.2rem}.hero-stage .bubble{width:38%}.hero-stage .tag{font-size:.66rem}}
.hero-stage .prod{filter:drop-shadow(0 34px 30px rgba(31,28,23,.22));mix-blend-mode:normal}

/* 360 spin */
.spin{position:relative;user-select:none;-webkit-user-select:none;touch-action:pan-y;cursor:grab;outline:none;border-radius:24px;background:radial-gradient(circle at 50% 38%,#fff 0%,var(--bg-alt) 60%,var(--bg-deep) 100%);aspect-ratio:1/1.1;display:grid;place-items:center;overflow:hidden}
.spin.grabbing{cursor:grabbing}
.spin img{width:86%;height:86%;object-fit:contain;pointer-events:none;filter:drop-shadow(0 28px 26px rgba(31,28,23,.2))}
.spin .hint{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 16px;font:500 .82rem/1 var(--sans);color:var(--ink-soft);box-shadow:0 8px 24px -12px rgba(0,0,0,.3);white-space:nowrap;transition:opacity .3s}
.spin.touched .hint{opacity:0}
.spin .hint svg{width:18px;height:18px;color:var(--gold-deep)}
.spin:focus-visible{box-shadow:0 0 0 3px rgba(36,48,96,.3)}

/* stats counters */
.stat b{font-variant-numeric:tabular-nums}

/* feature stack */
.fstack{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:start}
.fstack .sticky{position:sticky;top:96px}
.fimgs{position:relative;aspect-ratio:1/1;border-radius:22px;overflow:hidden;background:var(--bg-deep);box-shadow:var(--shadow)}
.fimg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .6s ease;transform:scale(1.02)}
.fimg.on{opacity:1;transform:none;transition:opacity .6s ease,transform 1.2s ease}
.fsteps{padding-top:10px}
.fstep{padding:26px 0 26px 30px;border-left:2px solid var(--line);position:relative;transition:border-color .3s,opacity .3s;opacity:.55}
.fstep.active{opacity:1;border-left-color:var(--gold)}
.fstep .num{position:absolute;left:-13px;top:28px;width:24px;height:24px;border-radius:50%;background:#fff;border:2px solid var(--line);font:600 .7rem/20px var(--sans);text-align:center;color:var(--gold-deep);transition:.3s}
.fstep.active .num{background:var(--gold);border-color:var(--gold);color:#fff}
.fstep h3{margin-bottom:.35em}
.fstep p{color:var(--ink-soft);margin:0}
.fstep .fthumb{display:none}
@media (max-width:860px){
  .fstack{grid-template-columns:1fr}.fstack .sticky{display:none}
  .fstep{opacity:1;border-left:0;padding-left:0}.fstep .num{position:static;display:inline-block;margin-bottom:12px;background:var(--gold);border-color:var(--gold);color:#fff}
  .fstep .fthumb{display:block;border-radius:16px;overflow:hidden;aspect-ratio:4/3;margin-bottom:16px;background:var(--bg-deep)}.fstep .fthumb img{width:100%;height:100%;object-fit:cover}
}

/* ROI calculator */
.roi{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(24px,4vw,56px);background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(22px,4vw,40px);box-shadow:var(--shadow)}
@media (max-width:860px){.roi{grid-template-columns:1fr}}
.roi .ctrl{margin-bottom:22px}
.roi .ctrl label{display:flex;justify-content:space-between;font-weight:500;font-size:.95rem;margin-bottom:8px}
.roi .ctrl label output{font-weight:600;color:var(--gold-deep)}
.roi input[type=range]{width:100%;accent-color:var(--navy);height:28px}
.roi .out{background:var(--bg-alt);border-radius:16px;padding:26px;display:grid;gap:18px;align-content:start}
.roi .o{display:flex;justify-content:space-between;align-items:baseline;gap:12px;border-bottom:1px solid var(--line);padding-bottom:14px}
.roi .o:last-child{border-bottom:0;padding-bottom:0}
.roi .o span{color:var(--ink-soft);font-size:.95rem}
.roi .o b{font:600 1.9rem/1 var(--serif);color:var(--ink);white-space:nowrap;font-variant-numeric:tabular-nums}
.roi .o.big b{color:var(--gold-deep);font-size:2.4rem}

/* before / after */
.ba{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);background:var(--bg-deep);aspect-ratio:1/1;user-select:none}
.ba img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ba .ba-after{clip-path:inset(0 0 0 50%)}
.ba input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0;z-index:3;-webkit-appearance:none}
.ba .ba-handle{position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;z-index:2;pointer-events:none}
.ba .ba-handle::after{content:"";position:absolute;top:50%;left:50%;width:46px;height:46px;border-radius:50%;background:#fff;transform:translate(-50%,-50%);box-shadow:0 6px 20px rgba(0,0,0,.3);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231F1C17' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 6 3 12l6 6M15 6l6 6-6 6'/%3E%3C/svg%3E");background-size:22px;background-repeat:no-repeat;background-position:center}
.ba .lbl{position:absolute;top:16px;font:600 .72rem/1 var(--sans);letter-spacing:.16em;text-transform:uppercase;background:rgba(255,255,255,.92);padding:8px 10px;border-radius:6px;z-index:2;pointer-events:none}
.ba .lbl.l{left:16px}.ba .lbl.r{right:16px}

/* lightbox */
.lbx{position:fixed;inset:0;z-index:100;background:rgba(31,28,23,.92);display:none;align-items:center;justify-content:center;padding:20px}
.lbx.open{display:flex}
.lbx figure{margin:0;max-width:min(1100px,96vw);max-height:92vh;display:flex;flex-direction:column;align-items:center;gap:12px}
.lbx img{max-width:100%;max-height:82vh;object-fit:contain;border-radius:12px;background:#fff}
.lbx figcaption{color:#fff;font-size:.95rem}
.lbx button{position:absolute;background:rgba(255,255,255,.12);border:0;color:#fff;width:48px;height:48px;border-radius:50%;cursor:pointer;display:grid;place-items:center}
.lbx button:hover{background:rgba(255,255,255,.25)}
.lbx button svg{width:24px;height:24px}
.lbx .lb-close{top:18px;right:18px}.lbx .lb-prev{left:14px;top:50%;transform:translateY(-50%)}.lbx .lb-next{right:14px;top:50%;transform:translateY(-50%)}

/* technique cards */
.techs{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
@media (max-width:1000px){.techs{grid-template-columns:repeat(3,1fr)}}
@media (max-width:640px){.techs{grid-template-columns:1fr 1fr}}
.tech{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 20px}
.tech .num{font:600 .8rem/1 var(--sans);letter-spacing:.16em;color:var(--gold-deep);display:block;margin-bottom:12px}
.tech h3{font-size:1.15rem;margin-bottom:.35em}
.tech p{font-size:.92rem;color:var(--ink-soft);margin:0}

/* trust strip */
.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0;font:500 .82rem/1.6 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);text-align:center}
.strip b{color:var(--ink);font-weight:600}
@media (max-width:1100px){.vids{grid-template-columns:repeat(2,1fr)!important}}
@media (max-width:640px){.vids{grid-template-columns:1fr!important}}
.hero-stage .spin{position:absolute;inset:0 0 6% 8%}

/* ===== v4: proof ===== */
.proofgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:44px}
@media (max-width:900px){.proofgrid{grid-template-columns:1fr}}
.pcard{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px 22px 22px;text-align:center}
.pcard .kick{font:600 .74rem/1 var(--sans);letter-spacing:.18em;text-transform:uppercase;color:var(--gold-deep);display:block;margin-bottom:14px}
.pcard .main{height:250px;display:grid;place-items:center;margin-bottom:10px}
.pcard .main img{max-height:250px;width:auto;object-fit:contain}
.pcard .big{font:600 2.6rem/1 var(--serif);color:var(--ink);margin:6px 0 2px}
.pcard .big small{font:500 .9rem/1 var(--sans);color:var(--ink-soft);margin-left:6px}
.pcard .sub{font-size:.9rem;color:var(--ink-soft);margin-bottom:18px}
.pcard .vsrow{display:grid;grid-template-columns:1fr 1fr;gap:10px;border-top:1px solid var(--line);padding-top:16px}
.pcard .vsrow div{display:flex;flex-direction:column;align-items:center;gap:6px;font-size:.82rem;color:var(--ink-soft)}
.pcard .vsrow img{height:88px;width:auto;object-fit:contain;opacity:.85}
.pcard .vsrow b{font:600 1.15rem/1 var(--serif);color:var(--ink)}
.ba-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
@media (max-width:860px){.ba-wrap{grid-template-columns:1fr}}
.ba-side{display:grid;grid-template-rows:1fr auto;gap:12px}
.ba-side .media-frame{aspect-ratio:1/1.1}
.ba-side .media-frame img{width:100%;height:100%;object-fit:cover}
.ba-side figcaption{font-size:.92rem;color:var(--ink-soft)}
.cfd{margin-top:26px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
.cfd img{width:100%;height:auto;display:block}
.cfd figcaption{font-size:.85rem;color:var(--ink-soft);padding:10px 14px}
.hero-stage .spin img{width:80%;height:84%}
.hero-stage .spec-chip{top:6%;right:-2%}
@media (max-width:860px){.hero-stage .spec-chip{top:3%;right:0}}

/* ===== v5 fixes ===== */
.stat > span{display:block;margin-top:10px;color:var(--ink-soft);font-size:.95rem}
.stat b .n{font:inherit;color:inherit;display:inline;font-style:normal}
.howsvg{aspect-ratio:980/430}
.howsvg .hl{stroke-width:2.4}
.howsvg .hs{stroke:#3E2E1E;stroke-width:1.9;transform-box:fill-box;transform-origin:0% 0%}
.howsvg .hs-air{animation:blow2 4.2s ease-in-out infinite}
.howsvg .hs-suck{animation:suck2 4.2s ease-in-out infinite}
@keyframes blow2{0%,28%{transform:none;opacity:1}62%{opacity:.9}78%,100%{transform:translate(90px,-150px) rotate(35deg);opacity:0}}
@keyframes suck2{0%,28%{transform:none;opacity:1}55%{opacity:1}72%,100%{transform:translate(20px,120px) scale(.6,.5);opacity:0}}
.howsvg .gust path{stroke-width:3.5;stroke-dasharray:12 10;animation:gust 1s linear infinite}
.howsvg .flow path{stroke-width:3.5;stroke-dasharray:8 9;animation:flow .8s linear infinite;marker-end:url(#arr)}
.howsvg .cap{font-size:14px}
.howsvg .cap2{font-size:13.5px}
.howsvg .cap2.gold{fill:#7A6A2C;font-weight:600}
.howsvg .lbl{font:600 13px/1 Inter,Arial,sans-serif;fill:#57524A;letter-spacing:.04em}
.howsvg .lead{stroke:#B4A064;stroke-width:1.5;fill:none}
@media (max-width:760px){.howsvg{aspect-ratio:auto}}
.fstep{cursor:pointer}
.fstep:hover{opacity:.9}
.howsvg .gust path{stroke:#C0583A;stroke-width:4;stroke-dasharray:10 9;marker-end:url(#arr)}
.howsvg .lbl.hot{fill:#C0583A}
.ba-wrap{grid-template-columns:1fr 1fr 1fr}
.ba-side .media-frame{aspect-ratio:1/1}
@media (max-width:1000px){.ba-wrap{grid-template-columns:1fr 1fr}.ba-side{grid-column:span 2}.ba-side .media-frame{aspect-ratio:2/1}}
@media (max-width:640px){.ba-wrap{grid-template-columns:1fr}.ba-side{grid-column:auto}.ba-side .media-frame{aspect-ratio:1/1}}