/* ============================================================
   DESALUS NETWORK — Master Stylesheet (canonical)
   Copied verbatim into every feeder-site folder for portability.
   Brand: zero-waste inland desalination. CTA -> desalus.com/contact
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
  --cyan:#00B4E5;
  --cyan-700:#0090b8;
  --cyan-50:#e6f8fe;
  --green:#3EB978;
  --green-700:#2f9460;
  --ink:#001324;
  --ink-800:#0a2233;
  --gold:#F7CF4C;
  --navy:#1F3864;
  --navy-700:#16294a;

  --white:#ffffff;
  --paper:#f6fafc;
  --mist:#eef4f7;
  --line:#dce7ed;
  --muted:#5a6b78;
  --text:#102a3a;

  --maxw:1180px;
  --pad:clamp(20px,5vw,40px);
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(0,19,36,.06),0 6px 18px rgba(0,19,36,.05);
  --shadow-md:0 10px 30px rgba(0,19,36,.10),0 2px 6px rgba(0,19,36,.06);
  --shadow-lg:0 30px 70px rgba(0,19,36,.18);

  --font-display:'Fraunces',Georgia,'Times New Roman',serif;
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;

  --accent:var(--cyan);          /* per-site overridable */
  --accent-700:var(--cyan-700);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font-body);color:var(--text);
  background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.08;color:var(--ink);
  margin:0 0 .5em;letter-spacing:-.01em;font-optical-sizing:auto}
p{margin:0 0 1rem}
ul{margin:0;padding:0;list-style:none}

/* ---------- Layout ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
.section{padding:clamp(56px,8vw,108px) 0}
.section--tight{padding:clamp(40px,6vw,72px) 0}
.eyebrow{display:inline-flex;align-items:center;gap:.5em;font-family:var(--font-body);
  font-weight:700;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent-700);margin-bottom:1rem}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--accent);border-radius:2px}
.lead{font-size:clamp(1.06rem,1.6vw,1.22rem);color:var(--muted);max-width:62ch}
.center{text-align:center}
.center .lead{margin-inline:auto}
.center .eyebrow::before{display:none}

h1{font-size:clamp(2.3rem,5.4vw,4rem)}
h2{font-size:clamp(1.8rem,3.6vw,2.85rem)}
h3{font-size:clamp(1.2rem,2vw,1.5rem)}

.grid{display:grid;gap:clamp(18px,2.4vw,28px)}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.6em;font-weight:700;font-size:1rem;
  padding:.95em 1.5em;border-radius:999px;border:2px solid transparent;cursor:pointer;
  transition:transform .15s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
  line-height:1;white-space:nowrap}
.btn svg{width:1.1em;height:1.1em;transition:transform .2s ease}
.btn:hover{transform:translateY(-2px)}
.btn:hover svg{transform:translateX(3px)}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 10px 24px rgba(0,180,229,.32)}
.btn--primary:hover{background:var(--accent-700);box-shadow:0 14px 30px rgba(0,180,229,.4)}
.btn--gold{background:var(--gold);color:var(--ink);box-shadow:0 10px 24px rgba(247,207,76,.4)}
.btn--gold:hover{background:#f4c52f}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent-700)}
.btn--light{background:#fff;color:var(--ink)}
.btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn--outline-light:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn--lg{font-size:1.08rem;padding:1.05em 1.8em}

/* ---------- Header / Nav ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand__icon{width:30px;height:30px;flex-shrink:0}
.brand__word{font-family:var(--font-display);font-weight:600;font-size:1.5rem;color:var(--ink);
  letter-spacing:-.01em;line-height:1}
.brand__tag{font-family:var(--font-body);font-size:.62rem;font-weight:700;letter-spacing:.12em;
  text-transform:uppercase;color:var(--accent-700);display:block;margin-top:2px}
.nav__links{display:flex;align-items:center;gap:30px}
.nav__links a{font-weight:600;font-size:.95rem;color:var(--ink-800);transition:color .15s}
.nav__links a:hover{color:var(--accent-700)}
.nav__cta{display:flex;align-items:center;gap:14px}
.nav__toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;color:var(--ink)}
.nav__toggle svg{width:26px;height:26px}

/* ---------- Hero ---------- */
.hero{position:relative;background:radial-gradient(120% 130% at 85% -10%,var(--ink-800) 0%,var(--ink) 55%);
  color:#fff;overflow:hidden;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='100' viewBox='0 0 56 100'%3E%3Cg fill='none' stroke='%23123' stroke-opacity='.6' stroke-width='1'%3E%3Cpath d='M28 0L0 16v33l28 16 28-16V16z'/%3E%3Cpath d='M28 66v34'/%3E%3C/g%3E%3C/svg%3E")}
.hero__inner{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:clamp(30px,5vw,64px);
  padding:clamp(56px,8vw,104px) 0 clamp(56px,8vw,96px)}
.hero h1{color:#fff}
.hero h1 .hl{color:var(--accent)}
.hero__sub{font-size:clamp(1.05rem,1.7vw,1.28rem);color:#bcd3e0;max-width:54ch;margin:1.2rem 0 1.9rem}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero__trust{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:2.2rem;color:#9fb9c8;font-size:.9rem}
.hero__trust b{color:#fff;font-weight:700}
.hero__art{position:relative}

/* badges */
.badge{display:inline-flex;align-items:center;gap:.5em;background:rgba(0,180,229,.12);
  border:1px solid rgba(0,180,229,.35);color:#bfeefc;padding:.5em 1em;border-radius:999px;
  font-size:.82rem;font-weight:600;margin-bottom:1.4rem}
.badge .dot{width:8px;height:8px;border-radius:50%;background:var(--green);
  box-shadow:0 0 0 4px rgba(62,185,120,.25)}

/* ---------- Stat strip ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(14px,2vw,24px)}
.stat{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(18px,2.2vw,26px);box-shadow:var(--shadow-sm)}
.stat__num{font-family:var(--font-display);font-weight:600;font-size:clamp(2rem,3.4vw,2.7rem);
  color:var(--accent-700);line-height:1}
.stat__label{font-size:.92rem;color:var(--muted);margin-top:.45rem}

/* on dark */
.stats--dark .stat{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.12)}
.stats--dark .stat__num{color:var(--accent)}
.stats--dark .stat__label{color:#9fb9c8}

/* ---------- Cards ---------- */
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(22px,2.6vw,32px);box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s,border-color .2s;height:100%}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfe6ef}
.card__icon{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;
  background:var(--cyan-50);color:var(--accent-700);margin-bottom:1.1rem}
.card__icon svg{width:26px;height:26px}
.card h3{margin-bottom:.5rem}
.card p{color:var(--muted);margin-bottom:0}
.card--soft{background:var(--paper);box-shadow:none}

/* ---------- Split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:clamp(30px,5vw,64px)}
.split--rev .split__media{order:2}
.media-card{background:var(--ink);border-radius:var(--radius);padding:clamp(22px,3vw,38px);
  box-shadow:var(--shadow-lg);overflow:hidden;position:relative}

/* ---------- Process steps ---------- */
.steps{counter-reset:step;display:grid;gap:18px}
.step{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(18px,2.4vw,26px);box-shadow:var(--shadow-sm)}
.step__n{counter-increment:step;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  background:var(--ink);color:#fff;font-family:var(--font-display);font-weight:600;font-size:1.2rem}
.step__n::before{content:counter(step)}
.step h3{margin-bottom:.3rem}
.step p{color:var(--muted);margin-bottom:0}

/* ---------- Comparison table ---------- */
.compare{width:100%;border-collapse:separate;border-spacing:0;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}
.compare th,.compare td{padding:16px clamp(14px,2vw,22px);text-align:left;border-bottom:1px solid var(--line);font-size:.96rem}
.compare thead th{background:var(--ink);color:#fff;font-family:var(--font-body);font-weight:700;font-size:.9rem}
.compare thead th.is-us{background:var(--accent)}
.compare td.is-us{background:var(--cyan-50);font-weight:600;color:var(--ink)}
.compare tbody tr:last-child td{border-bottom:0}
.compare td:first-child{font-weight:600;color:var(--ink)}
.yes{color:var(--green-700);font-weight:700}
.no{color:#c2543f;font-weight:700}

/* ---------- TDS gauge ---------- */
.gauge{display:flex;flex-direction:column;gap:10px}
.gauge__bar{height:18px;border-radius:999px;background:linear-gradient(90deg,#9fe0c4 0%,var(--green) 18%,var(--cyan) 42%,var(--gold) 72%,#e07a4f 100%);position:relative;box-shadow:inset 0 0 0 1px rgba(0,0,0,.05)}
.gauge__band{position:absolute;top:-6px;bottom:-6px;border:2px solid #fff;border-radius:8px;
  background:rgba(255,255,255,.18);box-shadow:0 0 0 2px var(--ink)}
.gauge__oor{position:absolute;top:0;bottom:0;border-radius:0 999px 999px 0;
  background:repeating-linear-gradient(45deg,rgba(2,17,30,.62) 0 5px,rgba(2,17,30,.32) 5px 10px);
  border-left:2px dashed rgba(255,255,255,.6)}
.gauge__scale{display:flex;justify-content:space-between;font-size:.78rem;color:var(--muted);font-weight:600}
.gauge__scale .oor{color:#e0895f}
@media (max-width:480px){.gauge__scale{font-size:.68rem}}

/* ---------- FAQ (CSS-only accordion) ---------- */
.faq{display:grid;gap:12px;max-width:820px;margin-inline:auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 clamp(16px,2vw,24px);box-shadow:var(--shadow-sm)}
.faq summary{list-style:none;cursor:pointer;padding:18px 0;font-weight:600;color:var(--ink);
  display:flex;justify-content:space-between;gap:16px;align-items:center;font-size:1.04rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.5rem;color:var(--accent-700);transition:transform .2s;line-height:1}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--muted);padding-bottom:18px;margin:0}

/* ---------- CTA band ---------- */
.cta{background:radial-gradient(130% 150% at 80% 0%,var(--navy) 0%,var(--ink) 68%);color:#fff;
  border-radius:clamp(18px,3vw,28px);padding:clamp(34px,5vw,64px);position:relative;overflow:hidden;isolation:isolate}
.cta::after{content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;z-index:-1;
  background:radial-gradient(circle,rgba(0,180,229,.45),transparent 70%)}
.cta h2{color:#fff}
.cta .lead{color:#c6d8e4}
.cta__row{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-top:1.6rem}
.cta__note{font-size:.86rem;color:#9fb9c8;margin-top:1.1rem}

/* pill list */
.checks{display:grid;gap:12px}
.checks li{display:flex;gap:12px;align-items:flex-start;color:var(--text)}
.checks li::before{content:"";flex:0 0 22px;height:22px;margin-top:2px;border-radius:50%;
  background:var(--green) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/14px no-repeat}
.checks.on-dark li{color:#cfe0ea}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#9fb9c8;padding:clamp(44px,6vw,72px) 0 32px}
.footer__top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer__brand .brand__word{color:#fff}
.footer__brand p{margin-top:1rem;max-width:38ch;font-size:.94rem}
.footer h4{color:#fff;font-family:var(--font-body);font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:1rem}
.footer__links li{margin-bottom:.6rem}
.footer__links a{font-size:.95rem;transition:color .15s}
.footer__links a:hover{color:var(--cyan)}
.footer__bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding-top:26px;font-size:.85rem;color:#7a93a3}
.footer__net{display:flex;flex-wrap:wrap;gap:8px 16px}
.footer__net a{color:#7a93a3}
.footer__net a:hover{color:var(--cyan)}

/* ---------- Misc utilities ---------- */
.tag{display:inline-block;background:var(--cyan-50);color:var(--accent-700);font-weight:700;
  font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;padding:.4em .8em;border-radius:6px}
.divider{height:1px;background:var(--line);border:0;margin:0}
.mist-bg{background:var(--paper)}
.ink-bg{background:var(--ink);color:#fff}
.ink-bg h2,.ink-bg h3{color:#fff}
.ink-bg .lead{color:#c6d8e4}
.hex-list{display:grid;gap:14px}
.hex-list li{display:flex;gap:14px;align-items:flex-start}
.hex-list .h{flex:0 0 40px;height:40px;display:grid;place-items:center;color:var(--accent-700)}
.note{font-size:.85rem;color:var(--muted)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* reveal on scroll (progressive enhancement; visible by default) */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .hero__inner{grid-template-columns:1fr;gap:36px}
  .hero__art{max-width:520px}
  .split,.split--rev .split__media{grid-template-columns:1fr;order:0}
  .footer__top{grid-template-columns:1fr 1fr}
  .g-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  .nav__links,.nav__cta .btn--ghost{display:none}
  .nav__toggle{display:block}
  .nav.open .nav__links{display:flex;position:absolute;left:0;right:0;top:72px;flex-direction:column;
    align-items:flex-start;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px var(--pad) 18px}
  .nav.open .nav__links a{padding:12px 0;width:100%;border-bottom:1px solid var(--mist)}
  .g-2,.g-3{grid-template-columns:1fr}
  .footer__top{grid-template-columns:1fr}
  .compare{display:block;overflow-x:auto;white-space:nowrap}
}
@media (max-width:560px){
  /* outcomes band sets an inline repeat(3,1fr); collapse it on phones so it can't overflow */
  .stats--dark{grid-template-columns:1fr!important}
}
@media (max-width:480px){
  .stats{grid-template-columns:1fr 1fr}
  .btn{font-size:.95rem}
  .hero__trust{gap:8px 18px}
}