:root{
  --ink:#0d231b;--ink2:#17382c;--green:#1d5a3a;--leaf:#2f7a4f;--teal:#2bb3a1;--teal-d:#127a6c;
  --paper:#f4f5f1;--white:#fff;--steel:#dde2de;--steel2:#c3cbc6;--mute:#4d5d56;--line:#d3d9d5;
  --orange:#e4601d;
  --f-head:'Archivo',system-ui,sans-serif;--f-body:'Public Sans',system-ui,sans-serif;--f-mono:'IBM Plex Mono',ui-monospace,monospace;
  --pad:24px;--max:1340px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.6;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--f-head);font-stretch:112%;line-height:1.08;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2.5rem,6.2vw,5.2rem);font-weight:800}
h2{font-size:clamp(1.9rem,3.8vw,3.1rem);font-weight:800}
h3{font-size:1.3rem;font-weight:700}
p{margin:0 0 1em}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.mono{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.04em;color:var(--teal-d)}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:0}

/* header */
.top{background:var(--ink);color:#cfe3da;font-size:.85rem}
.top .wrap{display:flex;justify-content:space-between;gap:16px;padding-top:7px;padding-bottom:7px;flex-wrap:wrap}
.top a{text-decoration:none}.top a:hover{color:#fff}
header.site{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px}
.logo img{height:46px;width:auto}
nav.main{display:flex;gap:6px;align-items:center}
nav.main a{text-decoration:none;font-weight:600;font-size:.95rem;padding:8px 12px;border-radius:6px;position:relative}
nav.main a:hover{background:var(--steel)}
nav.main a[aria-current=page]{color:var(--green)}
nav.main a[aria-current=page]::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;background:var(--teal);border-radius:2px}
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--green);color:#fff;font-weight:700;text-decoration:none;padding:14px 24px;border-radius:6px;border:2px solid var(--green);font-family:var(--f-body);font-size:1rem;cursor:pointer;transition:background .2s,transform .2s}
.btn:hover{background:var(--ink);border-color:var(--ink);transform:translateY(-1px)}
.btn.teal{background:var(--teal);border-color:var(--teal);color:var(--ink)}
.btn.teal:hover{background:#fff;border-color:#fff;color:var(--ink)}
.btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.65)}
.btn.ghost:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn.ghost-d{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn.ghost-d:hover{background:var(--ink);color:#fff}
.btn.sm{padding:10px 18px;font-size:.92rem}
.burger{display:none;background:none;border:2px solid var(--ink);border-radius:6px;width:46px;height:42px;cursor:pointer;padding:0}
.burger span{display:block;width:20px;height:2px;background:var(--ink);margin:4px auto;transition:.2s}

/* hero */
.hero{position:relative;min-height:calc(100svh - 120px);min-height:min(820px,calc(100svh - 120px));display:flex;align-items:flex-end;color:#fff;background:var(--ink);isolation:isolate}
.hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:60% 55%;z-index:-2}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(13,35,27,.92) 0%,rgba(13,35,27,.72) 40%,rgba(13,35,27,.1) 78%),linear-gradient(0deg,rgba(13,35,27,.85),transparent 45%)}
.hero .wrap{width:100%;padding-top:90px;padding-bottom:0}
.hero h1{max-width:13ch;margin-bottom:.35em}
.hero p.lead{font-size:clamp(1.05rem,1.6vw,1.3rem);max-width:52ch;color:#e3efe9}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0 56px}
.facts{padding:0 max(var(--pad),calc((100% - var(--max))/2 + var(--pad)));display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid rgba(255,255,255,.3);background:rgba(13,35,27,.55);backdrop-filter:blur(6px)}
.facts div{padding:20px 22px;border-left:1px solid rgba(255,255,255,.2)}
.facts div:first-child{border-left:0;padding-left:0}
.facts b{display:block;font-family:var(--f-head);font-stretch:112%;font-size:clamp(1.15rem,2vw,1.7rem);font-weight:800;white-space:nowrap;line-height:1.2;margin-bottom:2px}
.facts span{font-size:.85rem;color:#c8dcd2}
.hero .factswrap{width:100%}

/* sections */
section{padding:clamp(64px,9vw,120px) 0}
.sec-head{max-width:760px;margin-bottom:48px}
.sec-head p{color:var(--mute);font-size:1.1rem}
.dark{background:var(--ink);color:#e6f0eb}
.dark .sec-head p{color:#b8cfc4}
.dark .mono{color:var(--teal)}
.green{background:var(--green);color:#fff}

/* builder */
.builder{background:var(--white);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:grid;grid-template-columns:1.25fr 1fr;box-shadow:0 30px 60px -40px rgba(13,35,27,.5)}
.stage{background:#e9efec;position:relative;padding:28px 20px 24px;display:flex;flex-direction:column;justify-content:space-between;min-height:460px;overflow:hidden}
.stage svg{width:100%;height:auto;overflow:visible;margin:auto 0}
.stage .readout{position:relative;z-index:1}
.stage .readout{display:flex;justify-content:space-between;align-items:flex-end;gap:14px;flex-wrap:wrap;margin-top:12px}
.stage .readout b{font-family:var(--f-head);font-stretch:112%;font-size:clamp(2rem,4vw,3rem);line-height:1;font-weight:800}
.stage .readout small{display:block;font-family:var(--f-mono);font-size:.75rem;color:var(--mute)}
.controls{padding:30px;display:flex;flex-direction:column;gap:22px}
.controls fieldset{border:0;margin:0;padding:0}
.controls legend,.controls label.l{font-weight:700;font-size:.9rem;margin-bottom:8px;display:block;padding:0}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{position:relative}
.chip input{position:absolute;opacity:0;inset:0;cursor:pointer;margin:0}
.chip span{display:inline-block;padding:8px 14px;border:1.5px solid var(--steel2);border-radius:999px;font-size:.9rem;font-weight:600;background:#fff;transition:.15s}
.chip input:checked+span{background:var(--ink);color:#fff;border-color:var(--ink)}
.chip input:focus-visible+span{outline:3px solid var(--teal);outline-offset:2px}
.swatches{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.sw{position:relative;width:42px;height:42px}
.sw input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer;z-index:2}
.sw i{position:absolute;inset:0;border-radius:50%;border:3px solid #fff;box-shadow:0 0 0 1.5px var(--steel2);transition:.15s}
.sw input:checked+i{box-shadow:0 0 0 3px var(--ink)}
.sw input:focus-visible+i{box-shadow:0 0 0 3px var(--teal)}
.colname{font-size:.9rem;color:var(--mute);margin-top:8px}
.ral{display:flex;gap:8px;align-items:center;margin-top:10px}
.ral input[type=text]{font:inherit;padding:8px 12px;border:1.5px solid var(--steel2);border-radius:6px;width:150px}
input[type=range]{width:100%;accent-color:var(--green);height:32px}
.rangebar{display:flex;justify-content:space-between;font-family:var(--f-mono);font-size:.72rem;color:var(--mute)}
.stepper{display:inline-flex;align-items:center;border:1.5px solid var(--steel2);border-radius:8px;overflow:hidden}
.stepper button{width:44px;height:44px;border:0;background:#fff;font-size:1.3rem;cursor:pointer}
.stepper button:hover{background:var(--steel)}
.stepper output{min-width:48px;text-align:center;font-weight:700}
.summary{background:var(--paper);border-radius:10px;padding:16px 18px;font-size:.95rem;border:1px dashed var(--steel2)}
.summary b{font-family:var(--f-mono);font-size:.8rem;color:var(--teal-d);display:block;margin-bottom:4px}
.deliv{font-size:.9rem;color:var(--mute);margin:0}

/* bund diagram */
.bund{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,80px);align-items:center}
.bund .diagram{background:#10302a;border:1px solid #24493d;border-radius:14px;padding:22px}
.bund svg{width:100%;height:auto}
.leakbtn{margin-top:16px}
.list-check{list-style:none;padding:0;margin:20px 0 0}
.list-check li{padding:10px 0 10px 34px;position:relative;border-top:1px solid rgba(255,255,255,.15)}
.list-check li::before{content:"";position:absolute;left:0;top:16px;width:18px;height:10px;border-left:3px solid var(--teal);border-bottom:3px solid var(--teal);transform:rotate(-45deg) scale(.85)}

/* cards / photos */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;text-decoration:none;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);box-shadow:0 24px 40px -28px rgba(13,35,27,.55)}
.card img{aspect-ratio:4/3;object-fit:cover;width:100%}
.card div{padding:20px 22px 24px}
.card h3{margin-bottom:.3em}
.card p{color:var(--mute);margin:0;font-size:.97rem}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,80px);align-items:center}
.split.rev>:first-child{order:2}
.photo{border-radius:12px;overflow:hidden;position:relative}
.photo img{width:100%;height:100%;object-fit:cover;min-height:340px}
.nums{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
.nums div{border-top:3px solid var(--teal);padding-top:10px}
.nums b{font-family:var(--f-head);font-stretch:112%;font-size:2.2rem;font-weight:800;display:block;line-height:1.1}
.nums span{font-size:.88rem;color:var(--mute)}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;border-top:2px solid rgba(255,255,255,.3);padding-top:16px}
.steps li::before{content:"0" counter(s);font-family:var(--f-mono);color:var(--teal);font-size:.85rem;display:block;margin-bottom:6px}
.steps h3{font-size:1.1rem}
.steps p{font-size:.93rem;color:#b8cfc4;margin:0}

.cta-band{background:var(--teal);color:var(--ink)}
.cta-band .wrap{display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.cta-band h2{margin:0;max-width:20ch}
.cta-band .btn{background:var(--ink);border-color:var(--ink);color:#fff}
.cta-band .btn:hover{background:#fff;color:var(--ink);border-color:#fff}

/* page head */
.pagehead{background:var(--ink);color:#fff;padding:clamp(56px,8vw,110px) 0 clamp(44px,6vw,80px);position:relative;isolation:isolate;overflow:hidden}
.pagehead>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;opacity:.55}
.pagehead::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(13,35,27,.95),rgba(13,35,27,.55))}
.pagehead h1{font-size:clamp(2.2rem,5vw,4rem);max-width:18ch}
.pagehead p{max-width:58ch;color:#d4e6dd;font-size:1.15rem;margin:0}
.crumb{font-family:var(--f-mono);font-size:.78rem;color:var(--teal);margin-bottom:14px}
.crumb a{text-decoration:none}

/* tables / lists */
.specs{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.specs th,.specs td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top}
.specs th{width:34%;font-weight:700;background:#f9faf8}
.cols2{columns:2;column-gap:40px;list-style:none;padding:0;margin:0}
.cols2 li{padding:9px 0 9px 28px;border-bottom:1px solid var(--line);break-inside:avoid;position:relative}
.cols2 li::before{content:"";position:absolute;left:2px;top:17px;width:9px;height:9px;background:var(--teal);border-radius:2px}
.box{background:#fff;border:1px solid var(--line);border-radius:12px;padding:28px}

/* gallery */
.gal{columns:3;column-gap:16px}
.gal button{display:block;width:100%;margin:0 0 16px;padding:0;border:0;background:none;cursor:zoom-in;border-radius:10px;overflow:hidden;position:relative;break-inside:avoid}
.gal img{width:100%;height:auto;transition:transform .5s}
.gal button:hover img{transform:scale(1.03)}
.lb{position:fixed;inset:0;background:rgba(8,20,15,.94);z-index:200;display:none;align-items:center;justify-content:center;padding:20px}
.lb.on{display:flex}
.lb img{max-height:88vh;max-width:94vw;border-radius:6px;object-fit:contain}
.lb button{position:absolute;background:#fff;border:0;width:48px;height:48px;border-radius:50%;font-size:1.4rem;cursor:pointer}
.lb .x{top:16px;right:16px}.lb .p{left:16px;top:50%}.lb .n{right:16px;top:50%}

/* contact */
.contact{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(30px,5vw,70px)}
.cinfo p{margin:0 0 20px}
.cinfo b{display:block;font-family:var(--f-mono);font-size:.78rem;color:var(--teal-d);font-weight:500;margin-bottom:2px}
.cinfo a.big{font-family:var(--f-head);font-stretch:112%;font-weight:800;font-size:1.7rem;text-decoration:none}
form.enq{background:#fff;border:1px solid var(--line);border-radius:12px;padding:30px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
form.enq .full{grid-column:1/-1}
form.enq label{font-weight:700;font-size:.9rem;display:block;margin-bottom:6px}
form.enq input,form.enq select,form.enq textarea{width:100%;font:inherit;padding:12px 14px;border:1.5px solid var(--steel2);border-radius:8px;background:#fff}
form.enq input:focus,form.enq select:focus,form.enq textarea:focus{outline:3px solid rgba(43,179,161,.5);border-color:var(--teal-d)}
.note{font-size:.85rem;color:var(--mute)}

/* footer */
footer.site{background:var(--ink);color:#b8cfc4;padding:64px 0 28px}
footer.site .fg{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
footer.site h4{color:#fff;font-size:1rem;margin-bottom:.8em}
footer.site a{text-decoration:none;display:block;padding:3px 0}
footer.site a:hover{color:#fff}
footer.site img{height:46px;width:auto;background:#fff;padding:6px 10px;border-radius:6px;margin-bottom:16px}
footer.site .fine{border-top:1px solid #24493d;margin-top:40px;padding-top:20px;font-size:.82rem;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.cookie{position:fixed;left:16px;right:16px;bottom:16px;max-width:520px;background:#fff;border:1px solid var(--steel2);border-radius:10px;padding:16px 18px;z-index:90;box-shadow:0 20px 40px -20px rgba(0,0,0,.4);font-size:.9rem;display:none}
.cookie.on{display:block}
.cookie .row{display:flex;gap:10px;margin-top:10px}

.js .rv{opacity:0;transform:translateY(22px);transition:opacity .7s,transform .7s}
.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}
:focus-visible{outline:3px solid var(--teal);outline-offset:2px}

@media (max-width:980px){
  .stage{min-height:300px}
  .builder,.bund,.split,.contact{grid-template-columns:1fr}
  .split.rev>:first-child{order:0}
  .grid3{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  footer.site .fg{grid-template-columns:1fr 1fr}
  .gal{columns:2}
}
@media (max-width:860px){
  .burger{display:block}
  nav.main{position:fixed;left:0;right:0;top:0;padding:96px var(--pad) 28px;background:var(--paper);flex-direction:column;align-items:stretch;gap:0;transform:translateY(-110%);transition:transform .3s;z-index:-1;border-bottom:1px solid var(--line);box-shadow:0 30px 40px -30px rgba(0,0,0,.4)}
  nav.main.open{transform:none}
  nav.main a{font-size:1.15rem;padding:14px 4px;border-bottom:1px solid var(--line);border-radius:0}
  nav.main a[aria-current=page]::after{left:4px;right:auto;width:36px;bottom:6px}
  header.site .hdrbtn{display:none}
  header.site .wrap{height:68px}
  .logo img{height:40px}
  .burger{position:relative;z-index:2}
}
@media (max-width:640px){
  body{font-size:16px}
  .top .wrap{justify-content:center}.top .addr{display:none}
  .grid3,.steps{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr 1fr}
  .facts div:nth-child(3){border-left:0;padding-left:0}
  .facts div{padding:14px 14px}
  .hero{min-height:calc(100svh - 110px)}
  .hero::before{background:linear-gradient(0deg,rgba(13,35,27,.97) 5%,rgba(13,35,27,.8) 50%,rgba(13,35,27,.35))}
  .hero .cta{margin-bottom:32px}
  .controls{padding:22px 18px}
  .cols2{columns:1}
  .gal{columns:1}
  form.enq{grid-template-columns:1fr;padding:22px 18px}
  .nums{grid-template-columns:1fr 1fr}
  footer.site .fg{grid-template-columns:1fr}
  .specs th,.specs td{display:block;width:100%}
  .specs th{border-bottom:0;padding-bottom:2px}
}