:root{
  --navy:#0A2540;
  --navy-deep:#071B31;
  --blue:#0F6CBD;
  --blue-dark:#0B4F8A;
  --water:#EAF3FA;
  --line:#C9DDEB;
  --line-strong:#A9C4D9;
  --green:#2E9B57;
  --green-text:#1E7A44;
  --ink:#1B3148;
  --muted:#4A6178;
  --on-dark:#D3E2F0;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important}
}
body{
  margin:0;
  font-family:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:1.0625rem;line-height:1.65;color:var(--ink);background:#fff;
}
img{max-width:100%;display:block}
a{color:var(--blue)}
p{margin:0 0 1rem}
[id]{scroll-margin-top:92px}
h1,h2,h3{color:var(--navy);margin:0}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.dark :focus-visible,.cta :focus-visible,.site-footer :focus-visible{outline-color:#fff}

.wrap{width:min(1180px,100% - 40px);margin-inline:auto}
.skip{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:12px;top:12px}

/* ---------- buttons & links ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:.85rem 1.5rem;border:2px solid transparent;border-radius:4px;
  font:inherit;font-weight:700;font-size:1rem;line-height:1.2;text-align:center;text-decoration:none;cursor:pointer;
  transition:background-color .15s,color .15s,border-color .15s;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-outline{border-color:var(--navy);color:var(--navy);background:transparent}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-light{background:#fff;color:var(--blue-dark)}
.btn-light:hover{background:var(--water)}
.btn-ghost{border-color:#fff;color:#fff;background:transparent}
.btn-ghost:hover{background:#fff;color:var(--blue-dark)}
.text-link{font-weight:700;color:var(--blue);text-decoration:none;border-bottom:2px solid var(--green);padding-bottom:2px}
.text-link:hover{color:var(--blue-dark)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.brand img{height:95px;width:auto}
.nav{display:flex;align-items:center;gap:26px}
.nav a:not(.btn){color:var(--navy);text-decoration:none;font-weight:600;font-size:.94rem}
.nav a:not(.btn):hover{color:var(--blue)}
.nav .btn{padding:.6rem 1.1rem;font-size:.94rem}
.nav-toggle{
  display:none;background:#fff;color:var(--navy);border:2px solid var(--navy);border-radius:4px;
  padding:.45rem .9rem;font:inherit;font-weight:700;cursor:pointer;
}

/* ---------- hero ---------- */
.hero{background:var(--water)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;padding:72px 0 88px}
h1{
  font-size:clamp(2.2rem,4.6vw,3.7rem);line-height:1.06;font-weight:800;letter-spacing:-.025em;margin-bottom:22px;
}
.lead{font-size:1.15rem;line-height:1.6;max-width:56ch}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 28px}
.value-line{display:flex;flex-wrap:wrap;gap:8px 30px;list-style:none;padding:0;margin:0;font-weight:600;font-size:.95rem;color:var(--navy)}
.value-line li,.ticks li{position:relative;padding-left:26px}
.value-line li::before,.ticks li::before{
  content:"";position:absolute;left:1px;top:.5em;width:12px;height:6px;
  border-left:2.5px solid var(--green);border-bottom:2.5px solid var(--green);transform:rotate(-45deg);
}
.hero-fig{margin:0;position:relative}
.hero-fig img{width:100%;aspect-ratio:5/4;object-fit:cover;border-radius:6px;background:#fff}
.hero-fig::after{
  content:"";position:absolute;right:-12px;bottom:-12px;width:34%;height:34%;
  border-right:4px solid var(--green);border-bottom:4px solid var(--green);border-radius:0 0 8px 0;pointer-events:none;
}

/* ---------- sections ---------- */
.section{padding:92px 0}
.section-water{background:var(--water)}
.section-dark{background:var(--navy);color:var(--on-dark)}
.section-rule{border-top:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:48px}
h2{font-size:clamp(1.75rem,3.2vw,2.5rem);line-height:1.15;font-weight:700;letter-spacing:-.015em;margin-bottom:16px}
.section-dark h2,.section-dark h3{color:#fff}
.section-head p{color:var(--muted);font-size:1.08rem;margin:0}
.section-dark .section-head p{color:var(--on-dark)}
h3{font-size:1.2rem;line-height:1.3;font-weight:700}
.prose p{max-width:66ch}

/* intro */
.intro-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start}
.intro-grid h2{position:sticky;top:110px}

/* solutions */
.solution{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:48px 0}
.solution + .solution{border-top:1px solid var(--line)}
.solution:nth-of-type(even) .solution-media{order:2}
.solution-media{margin:0}
.solution-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:6px;background:var(--water)}
.solution-media figcaption{font-size:.86rem;color:var(--muted);margin-top:10px}
.solution h3{font-size:1.55rem;margin-bottom:14px;letter-spacing:-.01em}
.ticks{list-style:none;padding:0;margin:18px 0 26px}
.ticks li{margin:7px 0}

/* why */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px 36px}
.why-item{border-top:1px solid rgba(255,255,255,.28);padding-top:20px}
.why-item h3{font-size:1.08rem;margin-bottom:8px}
.why-item p{margin:0;font-size:.98rem;color:var(--on-dark)}

/* process: a treatment line with joints */
.pipeline{list-style:none;margin:0;padding:0}
.pipeline li{position:relative;padding:0 0 34px 76px}
.pipeline li:last-child{padding-bottom:0}
.pipeline li::after{content:"";position:absolute;left:23px;top:56px;bottom:8px;width:2px;background:var(--line-strong)}
.pipeline li:last-child::after{display:none}
.joint{
  position:absolute;left:0;top:0;width:48px;height:48px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:2px solid var(--blue);color:var(--navy);font-weight:800;font-size:.95rem;
}
.pipeline li:last-child .joint{border-color:var(--green);}
.pipeline h3{font-size:1.08rem;margin:10px 0 8px}
.pipeline p{margin:0;font-size:.98rem;color:var(--muted)}

/* industries */
.industry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 44px}
.industry{padding:22px 0 24px;border-top:1px solid var(--line-strong)}
.industry h3{font-size:1.08rem;margin-bottom:6px}
.industry p{margin:0;font-size:.98rem;color:var(--muted)}
.note{margin-top:28px;font-size:.95rem;color:var(--muted);max-width:70ch}

/* technologies */
.tech-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 64px;margin:0}
.tech{padding:18px 0;border-top:1px solid var(--line)}
.tech dt{font-weight:700;color:var(--blue-dark);margin-bottom:2px}
.tech dd{margin:0;color:var(--muted);font-size:.98rem}

/* customized */
.custom-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:6px;padding:28px 30px}
.panel h3{font-size:1.05rem;margin-bottom:6px}
.panel .ticks{columns:2;column-gap:28px;margin:12px 0 0}
.panel .ticks li{break-inside:avoid}
.cta-line{margin-top:26px}

/* recycling */
.recycle-grid{display:grid;grid-template-columns:7fr 5fr;gap:64px;align-items:center}
.answer{font-size:1.18rem;line-height:1.55;color:var(--navy);font-weight:600;max-width:60ch}
.flow{list-style:none;margin:0;padding:0}
.flow li{position:relative;background:var(--water);border-left:4px solid var(--blue);border-radius:4px;padding:18px 22px}
.flow li + li{margin-top:32px}
.flow li + li::before{content:"";position:absolute;left:26px;top:-32px;height:32px;border-left:2px dashed var(--blue)}
.flow li:last-child{border-left-color:var(--green)}
.flow strong{display:block;color:var(--navy);margin-bottom:2px}
.flow span{font-size:.96rem;color:var(--muted)}

/* india */
.region-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-top:40px}
.region h3{font-size:1rem;margin-bottom:12px;color:var(--blue-dark)}
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chips li{background:#fff;border:1px solid var(--line-strong);border-radius:3px;padding:3px 10px;font-size:.9rem;color:var(--navy)}

/* choose */
.choose-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:0 64px}
.choose-list li{position:relative;padding:20px 0 20px 34px;border-top:1px solid var(--line)}
.choose-list li::before{
  content:"";position:absolute;left:2px;top:32px;width:13px;height:7px;
  border-left:2.5px solid var(--green);border-bottom:2.5px solid var(--green);transform:rotate(-45deg);
}
.choose-list strong{display:block;color:var(--navy);margin-bottom:2px}
.choose-list span{color:var(--muted);font-size:.98rem}

/* faq */
.faq{max-width:880px}
.faq details{border-top:1px solid var(--line-strong)}
.faq details:last-child{border-bottom:1px solid var(--line-strong)}
.faq summary{cursor:pointer;list-style:none;position:relative;padding:20px 44px 20px 0}
.faq summary::-webkit-details-marker{display:none}
.faq summary h3{display:inline;font-size:1.06rem}
.faq summary::after{content:"+";position:absolute;right:6px;top:14px;font-size:1.7rem;line-height:1.2;color:var(--blue)}
.faq details[open] summary::after{content:"\2013"}
.faq details p{margin:0 0 22px;max-width:70ch;color:var(--ink)}

/* final cta + form */
.cta{background:var(--blue-dark);color:#fff}
.cta h2{color:#fff}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.cta p{color:#E4EEF8;max-width:56ch}
.cta .cta-row{margin-bottom:0}
.form-card{background:#fff;color:var(--ink);border-radius:6px;padding:32px}
.form-card h3{margin-bottom:4px}
.form-card .sub{font-size:.95rem;color:var(--muted);margin-bottom:20px}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}
.field{display:flex;flex-direction:column;gap:5px}
.field.full{grid-column:1 / -1}
.field label{font-weight:600;font-size:.9rem;color:var(--navy)}
.field input,.field select,.field textarea{
  width:100%;font:inherit;font-size:1rem;color:var(--ink);background:#fff;
  padding:.7rem .8rem;border:1px solid #86A8C4;border-radius:4px;
}
.field textarea{resize:vertical;min-height:110px}
.field input:focus,.field select:focus,.field textarea:focus{outline:3px solid var(--blue);outline-offset:1px;border-color:var(--blue)}
.form-card .btn{width:100%;margin-top:18px}


/* footer */
.site-footer{background:var(--navy-deep);color:var(--on-dark);padding:64px 0 28px;font-size:.96rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:44px}
.footer-logo{display:inline-block;background:#fff;padding:8px 12px;border-radius:4px;margin-bottom:16px}
.footer-logo img{height:40px;width:auto}
.site-footer h3{color:#fff;font-size:1rem;margin-bottom:14px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:8px 0}
.site-footer a{color:var(--on-dark);text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer .btn{color:#fff}
.footer-base{margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.18);font-size:.88rem}

/* ---------- responsive ---------- */
@media (min-width:1000px){
  .pipeline{display:grid;grid-template-columns:repeat(3,1fr);gap:44px 32px}
  .pipeline li{padding:64px 0 0 0}
  .pipeline li::after{left:56px;top:23px;bottom:auto;width:calc(100% - 32px);height:2px}
  .pipeline li:nth-child(3n)::after{display:none}
  .pipeline li:last-child{padding-bottom:0}
  .pipeline p{max-width:36ch}
}
@media (max-width:1080px){
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .industry-grid{grid-template-columns:repeat(2,1fr)}
  .region-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .nav-toggle{display:inline-block}
  .nav{
    display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;padding:8px 20px 20px;
  }
  .nav.open{display:flex}
  .nav a:not(.btn){padding:13px 0;border-bottom:1px solid var(--line)}
  .nav .btn{margin-top:14px}
  .hero-grid,.intro-grid,.solution,.custom-grid,.recycle-grid,.cta-grid{grid-template-columns:1fr;gap:36px}
  .hero-grid{padding:48px 0 64px}
  .intro-grid h2{position:static}
  .solution:nth-of-type(even) .solution-media{order:0}
  .section{padding:68px 0}
  .tech-list,.choose-list{grid-template-columns:1fr}
}
@media (max-width:620px){
  .why-grid,.industry-grid,.region-grid,.footer-grid,.fields{grid-template-columns:1fr}
  .panel .ticks{columns:1}
  .cta-row .btn{width:100%}
  .form-card{padding:24px 20px}
  .hero-fig::after{right:-8px;bottom:-8px}
}

/* ================= additions: dropdown, sub-pages, form states ================= */

/* solutions dropdown */
.dd{position:relative}
.dd summary{list-style:none;cursor:pointer;color:var(--navy);font-weight:600;font-size:.94rem;display:flex;align-items:center;gap:6px}
.dd summary::-webkit-details-marker{display:none}
.dd summary::after{content:"";width:7px;height:7px;border-right:2px solid var(--navy);border-bottom:2px solid var(--navy);transform:rotate(45deg) translateY(-2px);transition:transform .15s}
.dd[open] summary::after{transform:rotate(225deg) translateY(-1px)}
.dd summary:hover{color:var(--blue)}
.dd-menu{
  position:absolute;left:-16px;top:calc(100% + 18px);min-width:280px;background:#fff;
  border:1px solid var(--line);border-radius:6px;padding:8px;box-shadow:0 10px 30px rgba(10,37,64,.12);
  display:flex;flex-direction:column;
}
.nav .dd-menu a:not(.btn){padding:9px 12px;border-radius:4px;font-weight:500;font-size:.94rem}
.nav .dd-menu a:not(.btn):hover{background:var(--water);color:var(--blue-dark)}

/* breadcrumb */
.crumbs{font-size:.9rem;color:var(--muted);margin:0 0 18px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--line-strong)}
.crumbs a{color:var(--muted)}
.crumbs [aria-current]{color:var(--navy);font-weight:600}

/* sub-page hero is the home hero with a slightly smaller H1 */
.page-hero h1{font-size:clamp(2rem,4vw,3.1rem)}
.page-hero .hero-grid{padding:56px 0 72px}

/* stage list: a real sequence, so it gets numbered joints */
.stages{list-style:none;margin:0;padding:0;counter-reset:stage;max-width:820px}
.stages li{position:relative;padding:0 0 26px 64px;counter-increment:stage}
.stages li::before{
  content:counter(stage);position:absolute;left:0;top:0;width:42px;height:42px;border-radius:50%;
  background:#fff;border:2px solid var(--blue);color:var(--navy);font-weight:800;
  display:flex;align-items:center;justify-content:center;
}
.stages li::after{content:"";position:absolute;left:20px;top:46px;bottom:4px;width:2px;background:var(--line-strong)}
.stages li:last-child{padding-bottom:0}
.stages li:last-child::after{display:none}
.stages li:last-child::before{border-color:var(--green)}
.stages h3{font-size:1.06rem;margin:6px 0 4px}
.stages p{margin:0;color:var(--muted);font-size:.98rem}

/* uses / applications */
.uses-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 56px}
.uses-grid .industry{border-top:1px solid var(--line)}
.section-water .uses-grid .industry{border-top-color:var(--line-strong)}

/* two-column text + list */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}

/* comparison table */
.compare{width:100%;border-collapse:collapse;font-size:.98rem;background:#fff;border:1px solid var(--line-strong)}
.compare th,.compare td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.compare thead th{background:var(--navy);color:#fff;font-weight:700}
.compare tbody th{color:var(--navy);font-weight:700;width:34%}
.table-scroll{overflow-x:auto}

/* related solutions */
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.related-card{display:block;border:1px solid var(--line-strong);border-radius:6px;padding:20px;background:#fff;text-decoration:none;color:var(--ink);transition:border-color .15s}
.related-card:hover{border-color:var(--blue)}
.related-card strong{display:block;color:var(--navy);margin-bottom:6px}
.related-card span{font-size:.94rem;color:var(--muted)}

/* about / contact */
.principles{display:grid;grid-template-columns:repeat(2,1fr);gap:0 56px}
.contact-list{margin:18px 0 0}
.contact-list li{margin:8px 0}

/* form states */
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-status{margin:14px 0 0;font-size:.97rem;min-height:1.3em;font-weight:600}
.form-status.ok{color:var(--green-text);background:#EAF6EE;border:1px solid #B7DEC4;border-radius:4px;padding:12px 14px}
.form-status.err{color:#9B1C1C;background:#FDECEC;border:1px solid #F1B6B6;border-radius:4px;padding:12px 14px}
.field input[aria-invalid="true"],.field select[aria-invalid="true"],.field textarea[aria-invalid="true"]{border-color:#B42318;border-width:2px}
.field-error{color:#B42318;font-size:.86rem;font-weight:600}
.btn[disabled]{opacity:.7;cursor:progress}

@media (max-width:1080px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .split,.uses-grid,.principles{grid-template-columns:1fr;gap:28px}
  .dd{border-bottom:1px solid var(--line)}
  .dd summary{padding:13px 0;justify-content:space-between}
  .dd-menu{position:static;box-shadow:none;border:0;padding:0 0 8px 12px;min-width:0}
  .nav .dd-menu a:not(.btn){border-bottom:0;padding:9px 0}
  .page-hero .hero-grid{padding:40px 0 56px}
}
@media (max-width:620px){
  .related-grid{grid-template-columns:1fr}
}

.related-grid.cols-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:1080px){.related-grid.cols-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.related-grid.cols-3{grid-template-columns:1fr}}