/* CityH2O — site styles (no framework) */
:root{
  --bg:#f5fbff;--bg2:#e8f4fb;--card:#ffffff;--ink:#0b2236;--ink2:#3d5a73;--mute:#6b8499;
  --line:#d6e7f2;--brand:#0369a1;--brand2:#0891b2;--aqua:#22d3ee;--deep:#082f49;
  --ok:#059669;--warn:#d97706;--bad:#dc2626;--gold:#f59e0b;
  --r:16px;--r2:24px;--sh:0 1px 2px rgba(8,47,73,.06),0 8px 28px rgba(8,47,73,.08);
  --sh2:0 20px 60px rgba(3,105,161,.18);
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --sans:"Plus Jakarta Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
[data-theme=dark]{
  --bg:#06141f;--bg2:#0a1e2d;--card:#0e2638;--ink:#e6f4fb;--ink2:#a8c4d6;--mute:#7f9aad;
  --line:#173a52;--brand:#38bdf8;--brand2:#22d3ee;--deep:#020c14;
  --sh:0 1px 2px rgba(0,0,0,.3),0 8px 28px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.65;font-size:17px}
img,svg{max-width:100%}
a{color:var(--brand);text-underline-offset:3px}
a:hover{color:var(--brand2)}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2rem,5vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800}
h3{font-size:1.25rem;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.narrow{max-width:820px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;padding:8px 14px;z-index:99}
.skip:focus{left:8px}
:focus-visible{outline:3px solid var(--aqua);outline-offset:2px;border-radius:6px}

/* top bar */
.topbar{background:var(--deep);color:#cfe9f7;font-size:.86rem;text-align:center;padding:7px 0}
.topbar a{color:#cfe9f7;font-weight:600;text-decoration:none}
.topbar a:hover{color:#7dd3fc;text-decoration:underline}

/* header */
header.site{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:18px;height:68px}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.3rem;letter-spacing:-.03em}
.logo .lname b{color:var(--brand)}
.logo sub{font-size:.6em}
nav[aria-label=Main]{flex:1}
.menu{list-style:none;display:flex;gap:4px;margin:0;padding:0;justify-content:center}
.menu a{display:block;padding:8px 11px;border-radius:10px;text-decoration:none;color:var(--ink2);font-weight:600;font-size:.94rem}
.menu a:hover,.menu a.active{background:var(--bg2);color:var(--brand)}
.menu-cta{display:none}
.nav-cta{display:flex;gap:8px;align-items:center}
.icon-btn{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--ink);font-size:1.1rem;cursor:pointer}
.burger{display:none}
@media (max-width:1060px){
  .burger{display:block}
  .menu{display:none;position:absolute;left:0;right:0;top:68px;flex-direction:column;background:var(--card);border-bottom:1px solid var(--line);padding:12px 20px 18px;box-shadow:var(--sh)}
  .menu.open{display:flex}
  .menu-cta{display:block}.menu-cta a{background:var(--brand);color:#fff;text-align:center}
  .nav-cta .hide-sm{display:none}
}
@media (max-width:520px){.searchbox .btn{padding:10px 14px;font-size:.92rem}.topbar{font-size:.78rem}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:999px;font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;font-family:inherit;font-size:1rem;transition:transform .15s,box-shadow .15s,background .15s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand2),var(--brand));color:#fff;box-shadow:0 6px 18px rgba(3,105,161,.3)}
.btn-primary:hover{color:#fff;box-shadow:0 10px 26px rgba(3,105,161,.4)}
.btn-light{background:#fff;color:#075985}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-gold{background:var(--gold);color:#3b2400}
.btn-sm{padding:8px 16px;font-size:.9rem}
.btn-lg{padding:16px 28px;font-size:1.08rem}
.btn[disabled]{opacity:.6;cursor:wait}

/* hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 500px at 80% -10%,rgba(34,211,238,.28),transparent 60%),linear-gradient(180deg,var(--bg2),var(--bg));padding:64px 0 120px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}}
.pill{display:inline-flex;gap:8px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:.85rem;font-weight:600;color:var(--ink2)}
.pill i{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(5,150,105,.2)}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--brand2),var(--brand));-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{font-size:1.18rem;color:var(--ink2);max-width:640px}
.searchbox{display:flex;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:6px;box-shadow:var(--sh2);max-width:600px;position:relative}
.searchbox input{flex:1;border:0;background:transparent;font:inherit;padding:10px 16px;color:var(--ink);min-width:0}
.searchbox input:focus{outline:none}
.suggest{position:absolute;left:0;right:0;top:calc(100% + 6px);background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh);list-style:none;margin:0;padding:6px;z-index:20;max-height:320px;overflow:auto}
.suggest li a{display:flex;justify-content:space-between;padding:10px 12px;border-radius:10px;text-decoration:none;color:var(--ink)}
.suggest li a:hover,.suggest li a.hi{background:var(--bg2)}
.hero-stats{display:flex;gap:28px;flex-wrap:wrap;margin-top:28px}
.hero-stats b{display:block;font-family:var(--mono);font-size:1.6rem;color:var(--brand)}
.hero-stats span{font-size:.88rem;color:var(--mute)}
.wave{position:absolute;left:0;right:0;bottom:-2px;height:110px;pointer-events:none}
.wave path{animation:drift 12s ease-in-out infinite alternate}
.wave path:nth-child(2){animation-duration:16s;opacity:.6}
@keyframes drift{from{transform:translateX(0)}to{transform:translateX(-60px)}}
@media (prefers-reduced-motion:reduce){.wave path{animation:none}*{scroll-behavior:auto}}

/* glass card in hero */
.glass{background:color-mix(in srgb,var(--card) 80%,transparent);border:1px solid var(--line);border-radius:var(--r2);box-shadow:var(--sh2);padding:24px;backdrop-filter:blur(10px)}
.glass h3{display:flex;justify-content:space-between;align-items:center}
.gauge{height:12px;border-radius:99px;background:linear-gradient(90deg,#22c55e,#eab308,#f97316,#ef4444);position:relative;margin:10px 0 4px}
.gauge i{position:absolute;top:-5px;width:4px;height:22px;background:var(--ink);border-radius:2px;transition:left .6s}
.gauge-l{display:flex;justify-content:space-between;font-size:.75rem;color:var(--mute)}
.kv{display:grid;grid-template-columns:1fr auto;gap:8px 16px;margin:14px 0 0;font-size:.95rem}
.kv dt{color:var(--mute)}.kv dd{margin:0;font-weight:700;text-align:right}

/* sections */
section.block{padding:72px 0}
section.alt{background:var(--bg2)}
.sec-head{max-width:720px;margin:0 0 32px}
.sec-head.center{margin:0 auto 36px;text-align:center}
.kicker{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;color:var(--brand2);margin-bottom:8px}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--sh);transition:transform .2s,box-shadow .2s}
a.card{display:block;text-decoration:none;color:inherit}
a.card:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.card .ico{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:var(--bg2);font-size:1.4rem;margin-bottom:14px}
.card p{color:var(--ink2);margin:0}
.card h3{margin-bottom:6px}
.tag{display:inline-block;font-size:.74rem;font-weight:700;padding:3px 10px;border-radius:99px;background:var(--bg2);color:var(--brand);margin:0 4px 6px 0}
.tag.ok{background:#d1fae5;color:#065f46}.tag.warn{background:#fef3c7;color:#92400e}.tag.bad{background:#fee2e2;color:#991b1b}
[data-theme=dark] .tag.ok{background:#064e3b;color:#a7f3d0}[data-theme=dark] .tag.warn{background:#78350f;color:#fde68a}[data-theme=dark] .tag.bad{background:#7f1d1d;color:#fecaca}

/* page hero */
.page-hero{background:linear-gradient(180deg,var(--bg2),var(--bg));padding:56px 0 40px;border-bottom:1px solid var(--line)}
.page-hero.small{padding:40px 0 28px}
.crumbs{font-size:.86rem;color:var(--mute);margin-bottom:12px}
.crumbs a{color:var(--mute)}
.meta{font-size:.88rem;color:var(--mute)}

/* prose */
.prose{font-size:1.06rem}
.prose h2{margin-top:1.8em;font-size:1.6rem;scroll-margin-top:90px}
.prose h3{margin-top:1.4em}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.3em 0}
.prose table{width:100%;border-collapse:collapse;margin:1em 0 1.6em;font-size:.95rem;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--bg2)}
.prose blockquote,.callout{margin:1.4em 0;padding:16px 20px;border-left:4px solid var(--brand2);background:var(--bg2);border-radius:0 12px 12px 0}
.callout.warn{border-color:var(--warn)}
.guide-body{display:grid;grid-template-columns:1fr;gap:24px;padding-top:32px;padding-bottom:56px}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;font-size:.92rem}
.toc ol{margin:8px 0 0;padding-left:1.2em}
.guide-cta{background:linear-gradient(135deg,var(--deep),#075985);color:#e0f2fe;border-radius:var(--r2);padding:28px}
.guide-cta h3{color:#fff}
.sources-note{font-size:.85rem;color:var(--mute)}

/* forms */
label{font-weight:600;font-size:.94rem;display:block;margin-bottom:6px}
input,select,textarea{width:100%;font:inherit;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand2);box-shadow:0 0 0 4px rgba(34,211,238,.2)}
textarea{min-height:120px;resize:vertical}
.field{margin-bottom:16px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:620px){.row2{grid-template-columns:1fr}}
.hp{position:absolute!important;left:-9999px!important}
.form-msg{margin-top:10px;font-weight:600;font-size:.95rem}
.form-msg.ok{color:var(--ok)}.form-msg.err{color:var(--bad)}
.inline-form{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.inline-form input[type=email]{flex:1;min-width:180px}
.inline-form .form-msg{flex-basis:100%}
.consent{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:.88rem;color:var(--ink2)}
.consent input{width:auto;margin-top:4px}
.choices{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media (max-width:620px){.choices{grid-template-columns:1fr}}
.choice{position:relative}
.choice input{position:absolute;opacity:0}
.choice span{display:flex;gap:10px;align-items:center;padding:14px 16px;border:2px solid var(--line);border-radius:14px;cursor:pointer;font-weight:600;background:var(--card);transition:border-color .15s,background .15s}
.choice input:checked+span{border-color:var(--brand2);background:var(--bg2)}
.choice input:focus-visible+span{outline:3px solid var(--aqua)}
.step{display:none}.step.active{display:block;animation:fade .3s}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.steps-ind{display:flex;gap:6px;margin-bottom:20px}
.steps-ind span{flex:1;height:6px;border-radius:99px;background:var(--line)}
.steps-ind span.on{background:linear-gradient(90deg,var(--brand2),var(--brand))}
.step-nav{display:flex;justify-content:space-between;gap:10px;margin-top:20px}
.lead-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start}
@media (max-width:900px){.lead-wrap{grid-template-columns:1fr}}
.lead-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r2);padding:28px;box-shadow:var(--sh2)}
.trust{list-style:none;padding:0;margin:0}
.trust li{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line)}
.trust li b{display:block}

/* tools */
.tool{scroll-margin-top:90px}
.result{margin-top:16px;padding:18px;border-radius:14px;background:var(--bg2);border:1px solid var(--line)}
.result .big{font-family:var(--mono);font-size:1.8rem;font-weight:700;color:var(--brand)}
.bar{height:10px;background:var(--line);border-radius:99px;overflow:hidden;margin:8px 0}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--brand2),var(--brand));transition:width .5s}
.range-out{font-family:var(--mono);font-weight:700;color:var(--brand)}

/* cities */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
.filters input,.filters select{width:auto;flex:1;min-width:160px}
.city-card h3{display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.city-card .src{font-size:.92rem;color:var(--ink2)}
.city-card .links{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap;font-size:.9rem}
.city-card:target{outline:3px solid var(--aqua)}
.hard-scale{display:flex;gap:4px;margin:8px 0}
.hard-scale span{flex:1;height:8px;border-radius:4px;background:var(--line)}
.hard-scale span.on{background:var(--brand2)}

/* contaminants */
.ctab{width:100%;border-collapse:collapse}
.ctab th,.ctab td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
details.cbox{background:var(--card);border:1px solid var(--line);border-radius:var(--r);margin-bottom:12px;box-shadow:var(--sh)}
details.cbox summary{cursor:pointer;padding:18px 22px;font-weight:700;display:flex;justify-content:space-between;gap:12px;list-style:none}
details.cbox summary::-webkit-details-marker{display:none}
details.cbox summary .lim{font-family:var(--mono);font-size:.88rem;color:var(--brand);white-space:nowrap}
details.cbox .in{padding:0 22px 20px}
details.cbox[open]{box-shadow:var(--sh2)}

/* videos */
.vid{position:relative;aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#000 center/cover no-repeat;cursor:pointer}
.vid::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 50%,rgba(0,0,0,.6))}
.vid .play{position:absolute;z-index:2;left:50%;top:50%;transform:translate(-50%,-50%);width:68px;height:48px;border-radius:14px;background:#e11d48;display:grid;place-items:center;color:#fff;font-size:1.3rem}
.vid iframe{position:absolute;inset:0;width:100%;height:100%;border:0;z-index:3}

/* news */
.news-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.news-item .src{font-size:.82rem;color:var(--mute)}
.news-item a{font-weight:700;text-decoration:none;color:var(--ink)}
.news-item a:hover{color:var(--brand)}
.chip-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.chip{border:1px solid var(--line);background:var(--card);color:var(--ink2);border-radius:99px;padding:6px 14px;font-weight:600;cursor:pointer;font:inherit;font-size:.9rem}
.chip.on{background:var(--brand);color:#fff;border-color:var(--brand)}

/* donate */
.tiers{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media (max-width:760px){.tiers{grid-template-columns:repeat(2,1fr)}}
.tier input{position:absolute;opacity:0}
.tier span{display:block;text-align:center;padding:18px 10px;border:2px solid var(--line);border-radius:16px;cursor:pointer;background:var(--card)}
.tier span b{display:block;font-family:var(--mono);font-size:1.5rem;color:var(--brand)}
.tier span small{color:var(--mute)}
.tier input:checked+span{border-color:var(--brand2);background:var(--bg2)}
.progress{height:14px;background:var(--line);border-radius:99px;overflow:hidden}
.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--gold),#f97316)}

/* faq */
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq summary{cursor:pointer;font-weight:700}
.faq details p{margin:10px 0 0;color:var(--ink2)}

/* cta band */
.cta-band{background:linear-gradient(120deg,#075985,#0e7490 60%,#0891b2);color:#e0f2fe;padding:48px 0}
.cta-band-in{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin-bottom:6px}
.cta-band h2 em{color:#67e8f9;font-style:normal}
.cta-band p{margin:0;max-width:620px}

/* footer */
footer.site{background:var(--deep);color:#b6d4e6;padding:56px 0 24px;font-size:.94rem}
footer.site a{color:#cfe9f7;text-decoration:none}
footer.site a:hover{color:#67e8f9}
footer.site .logo{color:#fff}
footer.site h4{color:#fff;font-size:.95rem}
footer.site ul{list-style:none;padding:0;margin:0}
footer.site li{margin:6px 0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:28px}
@media (max-width:900px){.foot-grid{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1/-1}}
.foot-legal{border-top:1px solid #12344a;margin-top:36px;padding-top:20px;font-size:.84rem;color:#86a7bb}
footer.site input{background:#0b2a3d;border-color:#173a52;color:#fff}

/* cookie */
.cookie{position:fixed;left:16px;right:16px;bottom:16px;max-width:560px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--sh2);padding:16px 20px;z-index:80;display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.cookie p{margin:0;flex:1;font-size:.9rem;min-width:220px}

/* misc */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s,transform .6s}
.js .reveal.in{opacity:1;transform:none}
.ad-note{font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--mute);text-align:center;margin:24px 0 4px}
.steps-list{counter-reset:s;list-style:none;padding:0}
.steps-list li{counter-increment:s;position:relative;padding:0 0 18px 52px}
.steps-list li::before{content:counter(s);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800}
.fact{display:flex;gap:16px;align-items:center}
.fact .drop-ico{font-size:2rem}
.stat{font-family:var(--mono);font-size:2.2rem;font-weight:700;color:var(--brand)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--card)}
.mt0{margin-top:0}.mb0{margin-bottom:0}.center{text-align:center}.muted{color:var(--mute)}.small{font-size:.88rem}
.updated-stamp{font-size:.82rem;color:var(--mute);font-family:var(--mono)}