/* Wheaton Water Heater Pros — design system
   Teal #0F766E + Amber #F59E0B | Plus Jakarta Sans + Inter | mobile-first */
:root{
  --teal-50:#effbf9; --teal-100:#d7f2ee; --teal-200:#b3e5dd; --teal-300:#7fd2c7;
  --teal-400:#48b8ab; --teal-500:#279d92; --teal-600:#0f766e; --teal-700:#0d5f59;
  --teal-800:#0c4c48; --teal-900:#0a3b38; --teal-950:#062925;
  --amber-100:#fef3c7; --amber-300:#fcd34d; --amber-400:#fbbf24; --amber-500:#f59e0b;
  --amber-600:#d97706; --amber-700:#b45309;
  --ink:#10201d; --ink-soft:#3c5451; --paper:#ffffff; --off:#f7faf9;
  --border:#e2ecea; --dark:#07201d;
  --radius:20px; --shadow-1:0 1px 2px rgba(6,41,37,.06),0 8px 24px -12px rgba(6,41,37,.18);
  --shadow-2:0 2px 4px rgba(6,41,37,.06),0 20px 48px -16px rgba(6,41,37,.28);
  --glow:0 0 0 4px rgba(245,158,11,.18),0 10px 30px -8px rgba(245,158,11,.55);
  --font-h:"Plus Jakarta Sans",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-b:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --nav-h:72px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-b);font-size:1.0625rem;line-height:1.7;color:var(--ink);
  background:var(--paper);overflow-x:hidden;padding-bottom:76px}
@media(min-width:1024px){body{padding-bottom:0}}
img,svg{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{font-family:var(--font-h);line-height:1.15;letter-spacing:-0.02em;color:var(--ink);text-wrap:balance}
h1{font-size:clamp(2.5rem,6vw,4.25rem);font-weight:800}
h2{font-size:clamp(2rem,4.5vw,2.9rem);font-weight:800;margin-bottom:.6em}
h3{font-size:clamp(1.25rem,2.5vw,1.5rem);font-weight:700;margin-bottom:.5em}
p{margin-bottom:1.1em;max-width:68ch}
a{color:var(--teal-700);text-decoration-thickness:2px;text-underline-offset:3px}
a:hover{color:var(--teal-600)}
ul,ol{margin:0 0 1.1em 1.25em;max-width:68ch}
li{margin-bottom:.45em}
.wrap{width:min(1200px,100% - 2.5rem);margin-inline:auto}
.section{padding:4rem 0}
@media(min-width:1024px){.section{padding:7rem 0}}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-h);font-size:.78rem;
  font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--teal-700);
  background:var(--teal-50);border:1px solid var(--teal-100);border-radius:999px;padding:.4rem 1rem;margin-bottom:1.25rem}
.sec-head{max-width:760px;margin-bottom:3rem}
.sec-head p.lede{font-size:1.15rem;color:var(--ink-soft)}
.section.tint{background:var(--off)}
.section.deep{background:var(--dark);color:#eaf4f2}
.section.deep h2,.section.deep h3{color:#fff}
.section.deep .lede,.section.deep p{color:#c6dcd9}
.hl{position:relative;white-space:nowrap}
.hl>span{background:linear-gradient(180deg,transparent 62%,var(--amber-300) 62%,var(--amber-300) 96%,transparent 96%);padding:0 .08em}
.hl-grad{background:linear-gradient(92deg,var(--amber-300),var(--amber-500));-webkit-background-clip:text;background-clip:text;color:transparent}
/* skip link + focus */
.skip{position:absolute;left:-999px;top:0;background:var(--amber-500);color:#1c1005;font-weight:700;padding:.75rem 1.25rem;border-radius:0 0 12px 0;z-index:200}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--amber-500);outline-offset:3px;border-radius:6px}
/* header */
.site-head{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--nav-h)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--ink)}
.brand img{width:44px;height:44px}
.brand-name{font-family:var(--font-h);font-weight:800;font-size:1.05rem;line-height:1.15;letter-spacing:-0.01em}
.brand-name small{display:block;font-size:.68rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-600)}
.main-nav{display:none}
@media(min-width:1024px){.main-nav{display:flex;gap:1.75rem;align-items:center}
  .main-nav a{font-weight:600;font-size:.95rem;color:var(--ink);text-decoration:none}
  .main-nav a:hover{color:var(--teal-700)}}
.head-cta{display:none}
@media(min-width:1024px){.head-cta{display:inline-flex}}
.burger{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--border);border-radius:12px;background:#fff;cursor:pointer}
@media(min-width:1024px){.burger{display:none}}
.burger svg{width:24px;height:24px;stroke:var(--ink)}
.mobile-panel{position:fixed;inset:0;z-index:150;background:var(--teal-950);color:#fff;display:none;flex-direction:column;padding:1.5rem}
.mobile-panel.open{display:flex}
.mobile-panel a{color:#fff;text-decoration:none;font-family:var(--font-h);font-weight:700;font-size:1.5rem;padding:.7rem 0;border-bottom:1px solid rgba(255,255,255,.12)}
.mobile-panel .close{align-self:flex-end;background:none;border:1px solid rgba(255,255,255,.3);color:#fff;border-radius:12px;width:48px;height:48px;font-size:1.25rem;cursor:pointer}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;font-family:var(--font-h);font-weight:700;
  border-radius:999px;padding:1rem 1.9rem;font-size:1.05rem;text-decoration:none;border:2px solid transparent;cursor:pointer;min-height:48px;transition:transform .18s ease,box-shadow .18s ease}
.btn:active{transform:translateY(1px)}
.btn-amber{background:linear-gradient(180deg,var(--amber-400),var(--amber-500));color:#231300;box-shadow:var(--glow)}
.btn-amber:hover{color:#231300;box-shadow:0 0 0 6px rgba(245,158,11,.22),0 14px 34px -8px rgba(245,158,11,.6)}
.btn-outline{border-color:var(--teal-200);color:var(--teal-800);background:#fff}
.btn-outline:hover{border-color:var(--teal-600);color:var(--teal-700)}
.btn-light{background:#fff;color:var(--teal-900)}
.btn .ph{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2.2}
@media(max-width:639px){.btn{width:100%}}
/* hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 600px at 85% -10%,rgba(245,158,11,.16),transparent 60%),radial-gradient(900px 520px at 8% 12%,rgba(39,157,146,.28),transparent 55%),linear-gradient(160deg,var(--teal-950) 0%,var(--teal-900) 55%,#08302c 100%);color:#fff}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E")}
.hero .wrap{position:relative;z-index:2;display:grid;gap:3rem;padding:4.5rem 0 5.5rem;align-items:center}
@media(min-width:1024px){.hero .wrap{grid-template-columns:1.05fr .95fr;padding:6.5rem 0 7.5rem}}
.hero h1{color:#fff;margin:.9rem 0 1.1rem}
.hero .sub{font-size:1.2rem;color:#d7ecea;max-width:56ch}
.hero .eyebrow{background:rgba(245,158,11,.14);border-color:rgba(245,158,11,.4);color:var(--amber-300)}
.hero-ctas{display:flex;gap:1rem;flex-wrap:wrap;margin:1.8rem 0 1rem}
.hero-fine{font-size:.8rem;color:#9fc4c0;max-width:60ch;margin-top:.6rem}
.hero-fine a{color:#c9e4e1}
.trust-row{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1.4rem}
.chip{display:inline-flex;align-items:center;gap:.5rem;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(8px);border-radius:999px;padding:.5rem 1rem;font-size:.86rem;font-weight:600;color:#eaf6f4}
.chip svg{width:16px;height:16px;stroke:var(--amber-300);fill:none;stroke-width:2.2}
.hero-art{position:relative}
.hero-art .scene{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.16);border-radius:28px;padding:1.5rem;backdrop-filter:blur(6px)}
.glass-card{position:absolute;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);backdrop-filter:blur(14px);
  border-radius:16px;padding:.85rem 1.1rem;font-size:.85rem;font-weight:600;color:#fff;box-shadow:var(--shadow-2);display:flex;gap:.6rem;align-items:center;max-width:230px}
.glass-card svg{width:22px;height:22px;stroke:var(--amber-300);fill:none;stroke-width:2;flex:none}
.gc-1{top:6%;left:-4%}
.gc-2{bottom:14%;right:-3%}
.gc-3{bottom:-4%;left:12%}
@media(max-width:1023px){.gc-1{left:2%}.gc-2{right:2%}.gc-3{display:none}}
@media(max-width:639px){.glass-card{font-size:.75rem;padding:.6rem .8rem;max-width:180px}}
/* wave divider */
.wave{display:block;width:100%;height:70px;margin-bottom:-1px}
.hero .wave{position:absolute;bottom:-1px;left:0;z-index:3}
/* bento featured card: horizontal on desktop */
@media(min-width:1024px){
  .bento .span2{display:grid;grid-template-columns:auto 1fr;gap:1.5rem;align-items:center}
  .bento .span2 .iconbox{width:72px;height:72px;margin-bottom:0}
  .bento .span2 .iconbox svg{width:36px;height:36px}
}
/* bento */
.bento{display:grid;gap:1.25rem;grid-template-columns:1fr}
@media(min-width:640px){.bento{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.bento{grid-template-columns:repeat(3,1fr)}
  .bento .span2{grid-column:span 2}.bento .tall{grid-row:span 2}}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.75rem;box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease;position:relative}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-2)}
.card .iconbox{width:52px;height:52px;border-radius:14px;background:var(--teal-50);border:1px solid var(--teal-100);display:flex;align-items:center;justify-content:center;margin-bottom:1.1rem}
.card .iconbox svg{width:26px;height:26px;stroke:var(--teal-700);fill:none;stroke-width:2}
.card h3{margin-bottom:.4rem}
.card p{font-size:.98rem;color:var(--ink-soft);margin-bottom:1rem}
.card .go{font-weight:700;font-family:var(--font-h);font-size:.95rem;text-decoration:none;display:inline-flex;align-items:center;gap:.4rem}
.card .go svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2.2}
/* symptom checker */
.symptom-grid{display:grid;gap:1rem;grid-template-columns:1fr}
@media(min-width:768px){.symptom-grid{grid-template-columns:1fr 1fr}}
.sym-card{background:#fff;border:1px solid var(--border);border-left:5px solid var(--teal-600);border-radius:16px;padding:1.35rem 1.5rem;box-shadow:var(--shadow-1)}
.sym-card.warn{border-left-color:var(--amber-500)}
.sym-card h3{font-size:1.1rem;margin-bottom:.35rem}
.sym-card p{font-size:.95rem;color:var(--ink-soft);margin-bottom:.7rem}
.sym-card a{font-weight:700;font-size:.92rem;text-decoration:none}
/* split */
.split{display:grid;gap:2.5rem;align-items:center}
@media(min-width:1024px){.split{grid-template-columns:1fr 1fr}.split.flip>.txt{order:2}}
.split .art{background:var(--teal-50);border:1px solid var(--teal-100);border-radius:28px;padding:2rem}
/* callout */
.callout{border:1px solid var(--border);border-left:6px solid var(--teal-600);border-radius:14px;background:var(--teal-50);
  padding:1.4rem 1.6rem;margin:1.8rem 0;display:flex;gap:1rem;align-items:flex-start}
.callout.amber{border-left-color:var(--amber-500);background:#fffaf0}
.callout.red{border-left-color:#dc2626;background:#fef2f2}
.callout svg{width:26px;height:26px;flex:none;stroke:var(--teal-700);fill:none;stroke-width:2}
.callout.amber svg{stroke:var(--amber-600)}.callout.red svg{stroke:#dc2626}
.callout strong{display:block;font-family:var(--font-h);margin-bottom:.25rem}
.callout p{margin:0;font-size:.98rem}
/* process */
.process{position:relative;display:grid;gap:2rem;margin-top:2.5rem}
@media(min-width:1024px){.process{grid-template-columns:repeat(4,1fr);gap:1.5rem}}
.step{position:relative;padding-top:1rem}
.step .num{font-family:var(--font-h);font-weight:800;font-size:4.2rem;line-height:1;color:transparent;-webkit-text-stroke:2px var(--teal-200);margin-bottom:.6rem}
.step h3{margin-bottom:.4rem}
.step p{font-size:.95rem;color:var(--ink-soft)}
@media(min-width:1024px){.process::before{content:"";position:absolute;top:3.4rem;left:2%;right:2%;height:2px;background:linear-gradient(90deg,var(--teal-200),var(--amber-300),var(--teal-200));opacity:.6}}
/* tables */
.table-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:16px;margin:1.5rem 0}
table{width:100%;border-collapse:collapse;font-size:.98rem;min-width:560px}
th{background:var(--teal-900);color:#fff;text-align:left;padding:1rem 1.25rem;font-family:var(--font-h)}
td{padding:1rem 1.25rem;border-top:1px solid var(--border);vertical-align:top}
tr:nth-child(even) td{background:var(--off)}
/* dark CTA band */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(140deg,var(--teal-950),var(--teal-800) 70%,#0b4a44);color:#fff;border-radius:32px;padding:3.5rem 2rem;text-align:center;box-shadow:var(--shadow-2)}
@media(min-width:768px){.cta-band{padding:4.5rem 3rem}}
.cta-band::before{content:"";position:absolute;width:560px;height:560px;border-radius:50%;background:radial-gradient(circle,rgba(245,158,11,.35),transparent 65%);top:-280px;right:-160px;pointer-events:none}
.cta-band h2{color:#fff;margin-bottom:.6rem}
.cta-band p{color:#d7ecea;max-width:60ch;margin:0 auto 1.8rem}
.big-phone{display:inline-flex;align-items:center;gap:.9rem;font-family:var(--font-h);font-weight:800;font-size:clamp(1.9rem,6vw,3.2rem);
  color:#fff;text-decoration:none;letter-spacing:-0.02em;margin-bottom:1.6rem;text-shadow:0 0 34px rgba(245,158,11,.5)}
.big-phone svg{width:1em;height:1em;stroke:var(--amber-400);fill:none;stroke-width:2.2;animation:ringpulse 2.4s ease-in-out infinite}
@keyframes ringpulse{0%,100%{filter:drop-shadow(0 0 0 rgba(245,158,11,0))}50%{filter:drop-shadow(0 0 12px rgba(245,158,11,.9))}}
@media(prefers-reduced-motion:reduce){.big-phone svg{animation:none}}
/* dark process variant */
.section.process-dark{background:var(--dark);color:#eaf4f2}
.section.process-dark h2{color:#fff}
.section.process-dark .step .num{-webkit-text-stroke:2px var(--amber-400)}
.section.process-dark .step h3{color:#fff}
.section.process-dark .step p{color:#bcd8d5}
.section.process-dark .step a{color:var(--amber-300)}
@media(min-width:1024px){.section.process-dark .process::before{background:linear-gradient(90deg,var(--teal-600),var(--amber-500),var(--teal-600))}}
/* FAQ */
.faq{border:1px solid var(--border);border-radius:16px;margin-bottom:.9rem;background:#fff;overflow:hidden}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1.25rem 1.5rem;font-family:var(--font-h);font-weight:700;font-size:1.05rem;min-height:56px}
.faq summary::-webkit-details-marker{display:none}
.faq summary .plus{flex:none;width:34px;height:34px;border-radius:50%;background:var(--teal-50);display:flex;align-items:center;justify-content:center;transition:transform .25s ease,background .25s ease}
.faq summary .plus svg{width:18px;height:18px;stroke:var(--teal-700);stroke-width:2.5;fill:none}
.faq[open] summary .plus{transform:rotate(45deg);background:var(--amber-100)}
.faq[open] summary .plus svg{stroke:var(--amber-600)}
.faq .ans{padding:0 1.5rem 1.5rem;color:var(--ink-soft)}
.faq .ans p:last-child{margin-bottom:0}
/* toc + inner layout */
.inner{display:grid;gap:3rem}
@media(min-width:1024px){.inner{grid-template-columns:minmax(0,1fr) 320px;align-items:start}}
.toc{position:sticky;top:calc(var(--nav-h) + 1.5rem);background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow-1)}
.toc h2{font-size:1rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:.9rem}
.toc ol{margin:0;list-style:none;padding:0}
.toc li{margin-bottom:.4rem}
.toc a{text-decoration:none;font-size:.95rem;font-weight:600;color:var(--ink-soft)}
.toc a:hover{color:var(--teal-700)}
.call-card{position:sticky;top:calc(var(--nav-h) + 1.5rem);background:var(--teal-950);color:#fff;border-radius:var(--radius);padding:1.75rem;text-align:center;margin-top:1.5rem}
.call-card h2{color:#fff;font-size:1.15rem}
.call-card p{color:#bcd8d5;font-size:.92rem}
.call-card .btn{width:100%;margin-top:1rem}
@media(max-width:1023px){.toc{position:static}.call-card{position:static}}
/* breadcrumbs */
.crumbs{font-size:.86rem;color:var(--ink-soft);margin-bottom:1.5rem}
.crumbs a{text-decoration:none}
/* page hero (inner) */
.page-hero{background:linear-gradient(160deg,var(--teal-950),var(--teal-800));color:#fff;padding:3.5rem 0;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;opacity:.4;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E")}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{color:#fff;font-size:clamp(2rem,5vw,3.2rem);margin-bottom:.8rem}
.page-hero .sub{color:#d7ecea;max-width:62ch;font-size:1.12rem}
.page-hero .eyebrow{background:rgba(245,158,11,.14);border-color:rgba(245,158,11,.4);color:var(--amber-300)}
/* areas grid */
.area-grid{display:grid;gap:1.25rem;grid-template-columns:1fr}
@media(min-width:640px){.area-grid{grid-template-columns:1fr 1fr}}
.area-card{display:block;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.6rem;box-shadow:var(--shadow-1);text-decoration:none;color:var(--ink);transition:transform .2s ease,box-shadow .2s ease}
.area-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);color:var(--ink)}
.area-card h3{margin-bottom:.4rem}
.area-card p{font-size:.94rem;color:var(--ink-soft);margin:0}
/* footer */
.site-foot{background:var(--dark);color:#c6dcd9;margin-top:0}
.site-foot .cols{display:grid;gap:2.5rem;grid-template-columns:1fr 1fr;padding:4rem 0 3rem}
@media(min-width:1024px){.site-foot .cols{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.site-foot h2,.site-foot h3{color:#fff;font-size:1rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:1.1rem}
.site-foot a{color:#c6dcd9;text-decoration:none;font-size:.95rem}
.site-foot a:hover{color:var(--amber-300)}
.site-foot ul{list-style:none;margin:0;padding:0}
.site-foot li{margin-bottom:.55rem}
.foot-brand p{font-size:.92rem;max-width:38ch}
.disclaimer{border-top:1px solid rgba(255,255,255,.12);padding:1.75rem 0;font-size:.82rem;color:#8fb0ad}
.disclaimer p{max-width:none;margin-bottom:.7em}
/* sticky mobile call bar */
.call-bar{position:fixed;left:0;right:0;bottom:0;z-index:120;background:rgba(7,32,29,.96);backdrop-filter:blur(10px);
  border-top:1px solid rgba(255,255,255,.14);padding:.7rem 1rem calc(.7rem + env(safe-area-inset-bottom));display:flex;gap:.75rem}
.call-bar .btn{flex:1;padding:.85rem 1rem;font-size:1rem}
@media(min-width:1024px){.call-bar{display:none}}
/* reveal */
.rv{opacity:0;transform:translateY(26px);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}}
/* misc */
.two-col{display:grid;gap:2rem}
@media(min-width:768px){.two-col{grid-template-columns:1fr 1fr}}
.checklist{list-style:none;margin:0 0 1.2em;padding:0;max-width:68ch}
.checklist li{position:relative;padding-left:2rem;margin-bottom:.7em}
.checklist li svg{position:absolute;left:0;top:.3em;width:20px;height:20px;stroke:var(--teal-600);fill:none;stroke-width:2.5}
.kv{display:grid;grid-template-columns:1fr;gap:1rem;margin:1.5rem 0}
@media(min-width:768px){.kv{grid-template-columns:1fr 1fr 1fr}}
.kv .stat{background:var(--teal-50);border:1px solid var(--teal-100);border-radius:16px;padding:1.4rem;text-align:center}
.kv .stat b{display:block;font-family:var(--font-h);font-size:1.6rem;color:var(--teal-800)}
.kv .stat span{font-size:.9rem;color:var(--ink-soft)}
.note{font-size:.86rem;color:var(--ink-soft);font-style:italic}
.anchor-offset{scroll-margin-top:calc(var(--nav-h) + 24px)}