@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:wght@400;500;600;700&family=Outfit:wght@400;500;600&display=swap');
:root{--spruce:#12372A;--teal:#1D7A6E;--mineral:#E9F4F1;--limestone:#F7F4ED;--ink:#17211D;--muted:#5E6B65;--lime:#B7D63D;--white:#fff;--border:rgba(18,55,42,.12);--shadow:0 16px 44px rgba(18,55,42,.1);--fluid:cubic-bezier(.16,1,.3,1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--limestone);color:var(--ink);font-family:Outfit,system-ui,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}h1,h2,h3{font-family:"Bricolage Grotesque",system-ui,sans-serif;line-height:1.06;margin:0;color:var(--spruce)}p{margin:0}.shell{width:min(1180px,calc(100% - 40px));margin-inline:auto}.narrow{max-width:760px}.skip-link{position:fixed;z-index:100;left:16px;top:-80px;background:var(--lime);padding:12px 18px;border-radius:10px}.skip-link:focus{top:16px}:focus-visible{outline:3px solid var(--teal);outline-offset:4px}.site-header{position:sticky;top:0;z-index:50;background:rgba(247,244,237,.96);border-bottom:1px solid var(--border);backdrop-filter:blur(16px)}.nav{height:80px;display:flex;align-items:center;justify-content:space-between}.brand{font:600 22px/1 "Bricolage Grotesque";color:var(--spruce)}.brand span{color:var(--teal)}.nav-links{display:flex;align-items:center;gap:32px}.nav-links>a:not(.button):hover{color:var(--teal)}.menu-button{display:none}.button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:13px 24px;border-radius:12px;background:var(--spruce);color:white;font-weight:600;box-shadow:0 8px 26px rgba(18,55,42,.14);transition:.3s var(--fluid)}.button:hover{background:var(--teal);transform:translateY(-2px)}.button-small{min-height:44px;padding:10px 18px}.hero{overflow:hidden;border-bottom:1px solid var(--border)}.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;align-items:center;gap:64px;padding-block:86px}.pill{display:inline-flex;align-items:center;gap:10px;background:white;border:1px solid rgba(29,122,110,.2);border-radius:999px;padding:8px 15px;color:var(--teal);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.14em}.pill i{width:8px;height:8px;border-radius:50%;background:var(--lime)}.hero h1{font-size:clamp(45px,5vw,68px);letter-spacing:-.045em;margin-top:25px}.lead{font-size:19px;line-height:1.65;color:var(--muted);margin-top:24px;max-width:620px}.hero-actions{display:flex;gap:14px;align-items:center;margin-top:32px}.text-link{font-weight:600;color:var(--spruce);padding:10px}.hero small{display:block;color:var(--muted);margin-top:18px}.hero-art{height:520px;position:relative;border-radius:28px;background:linear-gradient(155deg,var(--mineral),#bddbd2);box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--border)}.sun{position:absolute;width:170px;height:170px;border-radius:50%;background:var(--lime);right:44px;top:38px;opacity:.8}.house{position:absolute;width:76%;height:52%;left:12%;bottom:18%;background:#fff;border-radius:8px 8px 18px 18px;box-shadow:0 24px 50px rgba(18,55,42,.18)}.roof{position:absolute;width:112%;height:110px;left:-6%;top:-72px;background:var(--spruce);clip-path:polygon(50% 0,100% 68%,94% 100%,6% 100%,0 68%)}.window{position:absolute;width:90px;height:88px;left:45px;top:65px;background:#b8ddd5;border:10px solid var(--teal)}.door{position:absolute;width:70px;height:120px;right:54px;bottom:0;background:#865f43;border-radius:5px 5px 0 0}.water-lines{position:absolute;inset:0;background:repeating-radial-gradient(circle at 10% 110%,transparent 0 48px,rgba(255,255,255,.42) 50px 52px)}.hero-art aside{position:absolute;left:24px;right:24px;bottom:22px;background:white;padding:18px 20px;border-radius:16px;display:grid;gap:4px;box-shadow:var(--shadow)}.hero-art aside span{font-size:14px;color:var(--muted)}.process{background:#fff;padding-block:48px}.process-grid{display:grid;grid-template-columns:.72fr 2.28fr;gap:54px}.process h2{font-size:31px;margin-top:10px}.eyebrow{text-transform:uppercase;letter-spacing:.17em;font-size:12px;font-weight:700;color:var(--teal)}.eyebrow.light{color:var(--lime)}.process ol{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.process li{border-left:1px solid var(--border);padding-left:20px}.process li>b{color:var(--teal)}.process h3{font-size:20px;margin:12px 0 7px}.process p,.section-head>p,.regions p{color:var(--muted)}.section{padding-block:92px}.services{background:var(--mineral)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:40px}.section-head h2,.regions h2,.methods h2{font-size:clamp(38px,4vw,52px);max-width:720px;margin-top:12px}.section-head>p{max-width:360px}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px}.service-card{min-height:280px;padding:28px;border:1px solid var(--border);border-radius:24px;background:#fff;display:flex;flex-direction:column;transition:.3s var(--fluid);box-shadow:0 5px 20px rgba(18,55,42,.05)}.service-card:hover,.editorial-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.service-card-featured{background:var(--spruce);color:#fff}.service-card-featured h3,.service-card-featured a{color:#fff}.card-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:13px;background:var(--mineral);color:var(--teal);font-weight:700}.service-card h3{font-size:25px;margin-top:24px}.service-card p{color:var(--muted);margin:12px 0 24px;flex:1}.service-card-featured p{color:rgba(255,255,255,.72)}.service-card>a{font-weight:600;color:var(--teal);border-top:1px solid var(--border);padding-top:17px}.combined{background:var(--limestone)}.methods{background:var(--spruce);color:#fff}.methods-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.methods h2{color:#fff;margin-top:14px}.methods header>p{color:rgba(255,255,255,.7);font-size:18px;margin-top:22px}.method-list{display:grid;gap:15px}.method-list article{display:flex;gap:24px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:28px;border-radius:24px}.method-list article:first-child{background:#fff;color:var(--ink)}.method-list article>span{font-size:28px;color:var(--lime)}.method-list h3{font-size:29px;color:inherit}.method-list b{display:inline-block;color:var(--lime);text-transform:uppercase;font-size:11px;letter-spacing:.12em;margin:8px 0}.method-list article:first-child b{color:var(--teal)}.method-list p{color:inherit;opacity:.72}.regions-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:70px}.regions h2{margin:14px 0 24px}.region-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.region-grid>a{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-radius:16px;background:#fff;border:1px solid var(--border);transition:.3s var(--fluid)}.region-grid>a:hover{transform:translateY(-2px);border-color:var(--teal)}.region-grid b,.region-grid small{display:block}.region-grid small{color:var(--muted);max-width:260px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.region-grid i{color:var(--teal)}.guides{background:white}.guide-grid{display:grid;grid-template-columns:1.25fr .875fr .875fr;gap:20px;margin-top:42px}.editorial-card{min-height:300px;border-radius:24px;padding:30px;background:var(--limestone);border:1px solid var(--border);display:flex;flex-direction:column;transition:.3s var(--fluid)}.editorial-card:nth-child(2){background:var(--mineral)}.editorial-card:nth-child(3){background:var(--spruce);color:#fff}.editorial-card:nth-child(3) h3,.editorial-card:nth-child(3) a{color:#fff}.editorial-card h3{font-size:28px;margin-top:18px}.editorial-card p{color:var(--muted);margin:16px 0;flex:1}.editorial-card:nth-child(3) p{color:rgba(255,255,255,.7)}.editorial-card a{font-weight:600;color:var(--teal)}.closing{padding:70px 0;background:var(--limestone)}.closing-card{position:relative;overflow:hidden;background:var(--spruce);padding:58px;border-radius:28px;color:#fff}.closing-card:after{content:"";position:absolute;width:280px;height:280px;border:48px solid rgba(29,122,110,.4);border-radius:50%;right:-70px;top:-130px}.closing h2{color:#fff;font-size:46px;max-width:700px;margin:14px 0}.closing p{color:rgba(255,255,255,.7);margin-bottom:28px}.button-lime{background:var(--lime);color:var(--spruce);position:relative;z-index:2}.footer{background:#0b281e;color:rgba(255,255,255,.68);padding:64px 0 24px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:70px}.brand-light{color:#fff}.footer-grid p{margin-top:18px;max-width:380px}.footer nav,.footer-grid>div:last-child{display:grid;gap:10px;align-content:start}.footer strong{color:#fff}.footer-cta{color:var(--lime)}.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.12);margin-top:46px;padding-top:22px}.article-hero{padding:80px 0 60px;background:var(--mineral)}.breadcrumb{display:inline-block;margin-bottom:28px;color:var(--teal);font-weight:600}.article-hero h1{font-size:clamp(42px,6vw,68px);margin-top:15px}.article-hero small{display:block;margin-top:22px;color:var(--muted)}.prose{padding-block:64px;font-size:18px}.prose>*+*{margin-top:22px}.prose h2,.prose h3{margin-top:42px}.prose ul,.prose ol{padding-left:24px}.callout{padding:24px;border-left:5px solid var(--teal);background:var(--mineral);border-radius:0 16px 16px 0}.callout p{margin-top:6px}.prose details{padding:18px;border:1px solid var(--border);border-radius:14px}.prose summary{font-weight:600;cursor:pointer}.table-scroll{overflow:auto}.prose table{width:100%;border-collapse:collapse}.prose th,.prose td{padding:12px;border:1px solid var(--border);text-align:left}.sources{margin-top:55px;padding-top:30px;border-top:1px solid var(--border);font-size:15px}.sources a{color:var(--teal);text-decoration:underline}.article-cta{background:var(--mineral);padding:50px 0}.article-cta .narrow{display:flex;align-items:center;justify-content:space-between;gap:25px}
@media(max-width:900px){.nav-links{display:none;position:absolute;top:80px;left:0;right:0;padding:22px;background:var(--limestone);border-bottom:1px solid var(--border);flex-direction:column;align-items:stretch}.nav-links.is-open{display:flex}.menu-button{display:block;border:1px solid var(--border);background:#fff;border-radius:10px;padding:9px 14px}.hero-grid,.process-grid,.methods-grid,.regions-grid{grid-template-columns:1fr}.hero-art{height:410px}.service-grid{grid-template-columns:1fr 1fr}.guide-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.process ol{grid-template-columns:1fr}.section-head{align-items:start;flex-direction:column}.regions-grid{gap:40px}}
@media(max-width:620px){.shell{width:min(100% - 28px,1180px)}.hero-grid{padding-block:54px;gap:40px}.hero h1{font-size:43px}.hero-actions{align-items:stretch;flex-direction:column}.hero-art{height:350px}.house{width:86%;left:7%}.section{padding-block:68px}.service-grid,.region-grid{grid-template-columns:1fr}.service-card{min-height:240px}.methods-grid{gap:38px}.method-list article{padding:22px}.footer-grid{grid-template-columns:1fr}.closing-card{padding:38px 26px}.closing h2{font-size:36px}.article-cta .narrow{align-items:flex-start;flex-direction:column}}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}

/* Loaded only by the water-heater variant. The default package stays unchanged. */
body.water-heater {
  --spruce: #10283f;
  --teal: #95492f;
  --mineral: #eaf0f5;
  --limestone: #faf8f4;
  --ink: #183047;
  --muted: #596874;
  --lime: #dfa681;
  --border: #10283f26;
  --shadow: 0 20px 48px #10283f0c;
  --wh-copper: #ad5b3a;
  --wh-light-copper: #dfa681;
  font-family: "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  background: var(--limestone);
}
.water-heater h1, .water-heater h2, .water-heater h3 { font-family: Georgia, "Times New Roman", serif; font-weight: 400; letter-spacing: -.035em; }
.water-heater .shell { width: min(1180px, calc(100% - 64px)); }
.water-heater .button { gap: 16px; border: 0; border-radius: 4px; box-shadow: none; font-family: inherit; font-size: 14px; letter-spacing: .01em; min-height: 50px; }
.water-heater .button:hover { transform: none; }
.water-heater .wh-button-copper { background: var(--wh-copper); color: white; }
.water-heater .wh-button-copper:hover { background: #94472e; }
.water-heater :focus-visible { outline: 3px solid #cf865d; outline-offset: 5px; }
.water-heater section[id], .water-heater [id="choisir"] { scroll-margin-top: 100px; }
.water-heater .wh-header { background: #10283ffa; border-color: #ffffff1c; backdrop-filter: blur(12px); }
.water-heater .nav { height: 86px; gap: 20px; }
.water-heater .wh-brand { display: flex; gap: 11px; align-items: center; color: #f5eee6; font: 400 22px/1.2 Georgia, serif; letter-spacing: -.025em; }
.water-heater .wh-brand-prefix { border: 1px solid #dfa6817a; color: var(--wh-light-copper); padding: 8px 7px; font: 600 10px/1.2 "Segoe UI", sans-serif; text-transform: uppercase; letter-spacing: .14em; }
.water-heater .nav-links { gap: 28px; color: #ecf0f2; font-size: 13px; }
.water-heater .nav-links > a:not(.button):hover { color: var(--wh-light-copper); }
.water-heater .nav-links .button { color: #f3eae3; border: 1px solid #ffffff4a; background: transparent; }
.water-heater .nav-links .button:hover { border-color: var(--wh-light-copper); }
.water-heater .wh-kicker { display: block; color: var(--teal); font-size: 10px; line-height: 1.6; font-weight: 650; letter-spacing: .17em; text-transform: uppercase; }
.water-heater .wh-hero { background: var(--spruce); color: #f9f6ef; overflow: hidden; }
.water-heater .wh-hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: 40px; padding: 52px 0 72px; }
.water-heater .wh-hero .wh-kicker { color: var(--wh-light-copper); display: flex; align-items: center; gap: 10px; }
.water-heater .wh-hero .wh-kicker i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.water-heater .wh-hero h1 { color: #f9f6ef; font-size: clamp(48px, 5.1vw, 72px); line-height: 1.05; max-width: 580px; margin: 28px 0 24px; }
.water-heater .wh-hero-copy > p { color: #c0cbd3; max-width: 450px; font-size: 16px; line-height: 1.85; }
.water-heater .wh-hero-actions { display: flex; gap: 26px; align-items: center; margin-top: 32px; }
.water-heater .wh-partner-note { color: #c2cfd8; font-size: 12px; line-height: 1.5; margin-top: 12px; }
.water-heater .wh-article-hero-action { margin: 24px 0; }
.water-heater .wh-mobile-quote { display: none; }
@media (max-width: 650px) {
  .water-heater:has(.wh-mobile-quote) { padding-bottom: calc(98px + env(safe-area-inset-bottom, 0px)); }
  html:has(.wh-mobile-quote) { scroll-padding-bottom: calc(110px + env(safe-area-inset-bottom, 0px)); }
  .water-heater .wh-mobile-quote { display: flex; flex-direction: column; align-items: stretch; gap: 5px; position: fixed; z-index: 30; bottom: 0; left: 0; right: 0; background: #10283f; padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px)); box-shadow: 0 -3px 15px #0002; }
  .water-heater .wh-mobile-quote .button { min-height: 44px; text-align: center; justify-content: center; font-size: 15px; padding: 11px 14px; }
  .water-heater .wh-mobile-quote small { color: #c2cfd8; text-align: center; font-size: 10px; }
  .water-heater:has(.menu-button[aria-expanded="true"]) .wh-mobile-quote { visibility: hidden; }
}
.water-heater .wh-quiet-link { color: #eceae4; font-size: 13px; padding-block: 12px; }
.water-heater .wh-quiet-link span { margin-left: 10px; color: var(--wh-light-copper); }
.water-heater .wh-hero-footnote { display: flex; gap: 10px; color: #b7c4ce; font-size: 11px; margin-top: 26px; }
.water-heater .wh-hero-footnote span { color: var(--wh-light-copper); }
.water-heater .wh-product { position: relative; min-width: 0; isolation: isolate; }
.water-heater .wh-product svg { display: block; width: 100%; height: auto; }
.water-heater .wh-product-grid { position: absolute; inset: 45px 15px; background-image: linear-gradient(#ffffff04 1px, transparent 1px), linear-gradient(90deg, #ffffff04 1px, transparent 1px); background-size: 36px 36px; z-index: -1; }
.water-heater .wh-product-index { position: absolute; top: 4px; left: 30px; font-size: 8px; letter-spacing: .24em; color: #93a9bb; }
.water-heater .wh-product-note { position: absolute; font-size: 11px; }
.water-heater .wh-product-note span { display: block; font-size: 8px; letter-spacing: .12em; color: var(--wh-light-copper); margin-bottom: 4px; }
.water-heater .wh-product-note b { font-weight: 400; color: #f4efe9; }
.water-heater .wh-product-note-top { top: 31%; left: 0; }
.water-heater .wh-product-note-bottom { top: 53%; right: 0; }
.water-heater .wh-product-caption { display: block; text-align: center; color: #a1b3c1; font-size: 9px; margin-top: -12px; }
.water-heater .wh-decisions { padding-top: 40px; padding-bottom: 32px; }
.water-heater .wh-section-label { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; padding-bottom: 22px; }
.water-heater .wh-section-label h2 { font-size: 23px; }
.water-heater .wh-decision-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--border); background: white; }
.water-heater .wh-decision { padding: 27px 30px 25px; border-right: 1px solid var(--border); transition: background .2s; }
.water-heater .wh-decision:last-child { border-right: 0; }
.water-heater .wh-decision:hover { background: #f0eee8; }
.water-heater .wh-decision-top { display: flex; align-items: center; justify-content: space-between; font-size: 9px; letter-spacing: .14em; font-weight: 600; color: var(--teal); }
.water-heater .wh-decision-top i { margin: 0 8px; font-style: normal; color: #aab3b9; }
.water-heater .wh-arrow { font-size: 21px; line-height: 1; font-weight: 400; }
.water-heater .wh-decision h3 { font-size: 29px; margin: 25px 0 12px; }
.water-heater .wh-decision p { font-size: 13px; line-height: 1.8; color: var(--muted); max-width: 270px; }
.water-heater .wh-read { display: block; margin-top: 21px; font-size: 11px; font-weight: 600; text-decoration: underline; text-underline-offset: 5px; }
.water-heater .wh-safety { display: flex; align-items: center; gap: 17px; padding-block: 8px 24px; border-bottom: 1px solid var(--border); }
.water-heater .wh-safety-icon { display: grid; place-items: center; flex: 0 0 25px; height: 25px; color: var(--teal); border: 1px solid #cfa98c; border-radius: 50%; font: 18px Georgia, serif; }
.water-heater .wh-safety p { flex: 1; color: var(--muted); font-size: 11px; }
.water-heater .wh-safety strong { color: var(--ink); }
.water-heater .wh-safety a { color: var(--teal); font-size: 11px; text-decoration: underline; text-underline-offset: 4px; }
.water-heater .wh-comparison { padding-block: 98px; }
.water-heater .wh-comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 110px; align-items: center; }
.water-heater .wh-comparison h2 { font-size: clamp(36px, 3.3vw, 48px); line-height: 1.12; margin: 18px 0 23px; }
.water-heater .wh-comparison header > p { color: var(--muted); line-height: 1.85; font-size: 14px; max-width: 430px; }
.water-heater .wh-underlined { display: inline-flex; align-items: center; gap: 22px; font-size: 12px; font-weight: 600; padding-bottom: 7px; border-bottom: 1px solid #b67b5f; margin-top: 25px; }
.water-heater .wh-checksheet { background: #fff; border: 1px solid var(--border); box-shadow: 11px 12px 0 #ece9e2; }
.water-heater .wh-checksheet-heading { padding: 20px 26px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; font-size: 10px; letter-spacing: .14em; }
.water-heater .wh-checksheet-heading > span:last-child { color: var(--teal); font-size: 17px; }
.water-heater .wh-checksheet-row { display: flex; gap: 17px; margin: 0 26px; padding: 20px 0; border-bottom: 1px solid var(--border); }
.water-heater .wh-check { color: var(--teal); margin-top: 3px; font-size: 14px; }
.water-heater .wh-checksheet h3 { font-size: 23px; }
.water-heater .wh-checksheet p { color: var(--muted); margin-top: 8px; font-size: 12px; line-height: 1.8; }
.water-heater .wh-checksheet-note { color: var(--teal); font: italic 14px Georgia, serif; padding: 19px 26px; }
.water-heater .wh-project { padding: 74px 0 50px; background: #eaf0f3; }
.water-heater .wh-project-heading { display: flex; align-items: end; justify-content: space-between; gap: 80px; }
.water-heater .wh-project h2 { font-size: clamp(35px, 3.2vw, 44px); line-height: 1.15; max-width: 570px; margin-top: 18px; }
.water-heater .wh-project-heading > p { max-width: 295px; color: var(--muted); font-size: 13px; }
.water-heater .wh-steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 52px; padding: 0; margin: 45px 0 35px; }
.water-heater .wh-steps li { border-top: 1px solid #a1b2c1; padding-top: 16px; }
.water-heater .wh-steps li > span { color: var(--teal); font-size: 11px; }
.water-heater .wh-steps h3 { font-size: 26px; margin-top: 18px; }
.water-heater .wh-steps p { font-size: 13px; line-height: 1.8; color: var(--muted); margin-top: 12px; }
.water-heater .wh-project-action { display: flex; justify-content: space-between; align-items: center; gap: 35px; border-top: 1px solid #c5d1d9; padding-top: 30px; }
.water-heater .wh-project-action p { font-size: 12px; color: var(--muted); }
.water-heater .wh-project-action strong { font-weight: 600; color: var(--ink); }
.water-heater .wh-button-pending, .water-heater .wh-button-pending:hover { background: #d5dfe5; color: #455b6a; cursor: not-allowed; opacity: 1; }
.water-heater .wh-form-note { display: block; font-size: 10px; margin-top: 9px; color: var(--muted); }
.water-heater .wh-library { padding-top: 92px; padding-bottom: 85px; }
.water-heater .wh-library-heading { display: flex; justify-content: space-between; align-items: end; gap: 36px; margin-bottom: 40px; }
.water-heater .wh-library h2 { font-size: clamp(36px, 3.3vw, 48px); line-height: 1.12; margin-top: 18px; }
.water-heater .wh-library-grid { display: grid; grid-template-columns: 1fr 1fr; column-gap: 65px; }
.water-heater .wh-guide-row { display: flex; align-items: start; gap: 19px; padding: 25px 0; border-top: 1px solid var(--border); }
.water-heater .wh-guide-number { color: var(--teal); font-size: 10px; margin-top: 6px; }
.water-heater .wh-guide-row h3 { font-size: 25px; line-height: 1.2; }
.water-heater .wh-guide-row p { margin-top: 10px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.water-heater .wh-guide-arrow { color: var(--teal); margin-left: auto; }
.water-heater .wh-guide-row:hover h3 { color: var(--teal); }
.water-heater .wh-about { border-top: 1px solid var(--border); padding-block: 38px; background: #f1ede6; }
.water-heater .wh-about-grid { display: grid; grid-template-columns: 1fr 3fr; gap: 40px; }
.water-heater .wh-about h2 { font-size: 24px; margin-bottom: 12px; }
.water-heater .wh-about p { font-size: 12px; line-height: 1.85; color: var(--muted); }
.water-heater .wh-footer { background: #0b2033; padding-top: 52px; }
.water-heater .wh-footer-grid { display: grid; grid-template-columns: 1.5fr .8fr 1.2fr; gap: 70px; }
.water-heater .wh-footer-grid p { font-size: 12px; line-height: 1.9; margin: 18px 0; color: #afbec9; max-width: 340px; }
.water-heater .wh-footer nav { display: grid; align-content: start; gap: 10px; font-size: 12px; }
.water-heater .wh-footer strong { font-size: 12px; }
.water-heater .wh-footer .wh-button-pending { background: #20394f; color: #cad5dd; }
.water-heater .wh-footer .wh-form-note { color: #afbec9; }
.water-heater .footer-bottom { font-size: 10px; }
/* The same identity follows the visitor into every article and guide index. */
.water-heater .article-hero { background: var(--spruce); padding: 60px 0 55px; }
.water-heater .article-hero h1 { color: #faf8f4; font-size: clamp(37px, 4.2vw, 57px); line-height: 1.12; }
.water-heater .article-hero .breadcrumb, .water-heater .article-hero .eyebrow { color: var(--wh-light-copper); }
.water-heater .article-hero .lead { color: #c2cfd8; font-size: 17px; }
.water-heater .article-hero small { color: #aabdc9; font-size: 11px; }
.water-heater .prose { font-size: 17px; line-height: 1.9; padding-block: 50px; }
.water-heater .prose h2 { font-size: 32px; line-height: 1.2; }
.water-heater .prose h3 { font-size: 26px; line-height: 1.2; }
.water-heater .prose th { background: #eaf0f3; color: var(--ink); font-size: 14px; }
.water-heater .prose td { background: #fff; font-size: 15px; }
.water-heater .prose .table-scroll { border-radius: 0; }
.water-heater .prose a { text-decoration: underline; text-underline-offset: 3px; color: var(--teal); }
.water-heater .prose .callout { border-radius: 0; }
.water-heater .article-cta { padding-block: 44px; }
.water-heater .article-cta h2 { font-size: 30px; line-height: 1.2; }
.water-heater .article-cta p { font-size: 13px; color: var(--muted); margin-top: 12px; }
.water-heater .article-cta .wh-article-action { flex-shrink: 0; }
.water-heater .guides.section { background: var(--limestone); }
.water-heater .guides.section h1 { font-size: clamp(38px, 5vw, 58px); }
.water-heater .guide-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
.water-heater .editorial-card, .water-heater .editorial-card:nth-child(2), .water-heater .editorial-card:nth-child(3) { background: white; border-radius: 0; color: var(--ink); box-shadow: none; }
.water-heater .editorial-card h3, .water-heater .editorial-card:nth-child(3) h3 { color: var(--ink); line-height: 1.2; }
.water-heater .editorial-card p, .water-heater .editorial-card:nth-child(3) p { color: var(--muted); font-size: 14px; }
.water-heater .editorial-card a, .water-heater .editorial-card:nth-child(3) a { color: var(--teal); font-size: 13px; }
.water-heater .editorial-card .eyebrow { font-size: 9px; }
.water-heater .editorial-card:hover { transform: none; border-color: var(--wh-copper); }
@media (max-width: 1000px) {
  .water-heater .nav-links { gap: 18px; }
  .water-heater .wh-brand { font-size: 19px; }
  .water-heater .wh-hero-grid { gap: 15px; }
  .water-heater .wh-hero-actions { gap: 17px; }
  .water-heater .wh-comparison-grid { gap: 55px; }
  .water-heater .wh-decision { padding-inline: 22px; }
  .water-heater .wh-footer-grid { gap: 35px; }
}
@media (max-width: 900px) {
  .water-heater .nav { height: 74px; }
  .water-heater .nav-links { background: #10283f; top: 74px; padding: 25px 32px; }
  .water-heater .menu-button { background: transparent; color: white; border: 1px solid #ffffff50; border-radius: 3px; }
  .water-heater .menu-button span { margin-left: 8px; }
  .water-heater .wh-hero-grid { grid-template-columns: 1fr 1fr; padding: 50px 0; }
  .water-heater .wh-hero h1 { font-size: 48px; }
  .water-heater .wh-hero-copy > p { font-size: 14px; }
  .water-heater .wh-hero-actions { align-items: start; flex-direction: column; gap: 10px; }
  .water-heater .wh-product-note { font-size: 9px; }
  .water-heater .wh-product-note span { font-size: 7px; }
  .water-heater .wh-product-note-top { left: -4px; }
  .water-heater .wh-product-caption { font-size: 8px; }
  .water-heater .wh-decision h3 { font-size: 25px; }
  .water-heater .wh-decision-top { font-size: 8px; letter-spacing: .06em; }
  .water-heater .wh-decision-top i { margin-inline: 4px; }
  .water-heater .wh-comparison-grid { gap: 40px; }
  .water-heater .wh-steps { gap: 28px; }
  .water-heater .wh-project-heading { gap: 35px; }
  .water-heater .wh-footer-grid { grid-template-columns: 1.2fr 1fr; }
  .water-heater .wh-footer-project { grid-column: 1 / -1; border-top: 1px solid #ffffff20; padding-top: 25px; }
  .water-heater .wh-library-grid { column-gap: 35px; }
  .water-heater .guide-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 650px) {
  .water-heater .shell { width: calc(100% - 40px); }
  .water-heater .nav { gap: 10px; }
  .water-heater .wh-brand { font-size: 17px; gap: 8px; }
  .water-heater .wh-brand-prefix { font-size: 8px; padding: 7px 5px; }
  .water-heater .menu-button { font-size: 11px; padding: 9px; flex-shrink: 0; }
  .water-heater .menu-button span { display: none; }
  .water-heater .wh-hero-grid { grid-template-columns: 1fr; padding: 38px 0 26px; gap: 24px; }
  .water-heater .wh-hero h1 { font-size: clamp(43px, 10.5vw, 60px); margin: 22px 0 20px; max-width: 420px; }
  .water-heater .wh-hero-copy > p { font-size: 14px; }
  .water-heater .wh-hero-actions { flex-direction: row; align-items: center; gap: 20px; margin-top: 25px; flex-wrap: wrap; }
  .water-heater .wh-hero-actions .button { font-size: 12px; padding: 12px 16px; }
  .water-heater .wh-quiet-link { font-size: 11px; }
  .water-heater .wh-hero-footnote { font-size: 10px; margin-top: 20px; }
  .water-heater .wh-product { width: 100%; max-width: 380px; margin-inline: auto; }
  .water-heater .wh-product-note { font-size: 10px; }
  .water-heater .wh-product-note span { font-size: 8px; }
  .water-heater .wh-product-index { left: 5px; }
  .water-heater .wh-product-caption { margin-top: -6px; }
  .water-heater .wh-decisions { padding-top: 30px; }
  .water-heater .wh-section-label { flex-direction: column; align-items: start; gap: 8px; }
  .water-heater .wh-decision-grid { grid-template-columns: 1fr; }
  .water-heater .wh-decision { padding: 22px; border-right: 0; border-bottom: 1px solid var(--border); }
  .water-heater .wh-decision:last-child { border-bottom: 0; }
  .water-heater .wh-decision h3 { font-size: 29px; margin-top: 18px; }
  .water-heater .wh-decision p { max-width: none; }
  .water-heater .wh-decision-top { font-size: 9px; }
  .water-heater .wh-read { margin-top: 15px; }
  .water-heater .wh-safety { flex-wrap: wrap; gap: 12px; }
  .water-heater .wh-safety p { flex-basis: calc(100% - 40px); }
  .water-heater .wh-safety a { margin-left: 37px; }
  .water-heater .wh-comparison { padding-block: 58px; }
  .water-heater .wh-comparison-grid { grid-template-columns: 1fr; gap: 36px; }
  .water-heater .wh-checksheet { margin-right: 10px; }
  .water-heater .wh-project { padding-block: 48px 40px; }
  .water-heater .wh-project-heading { flex-direction: column; align-items: start; gap: 18px; }
  .water-heater .wh-project-heading > p { max-width: none; }
  .water-heater .wh-steps { grid-template-columns: 1fr; gap: 24px; margin-top: 28px; }
  .water-heater .wh-steps h3 { margin-top: 10px; }
  .water-heater .wh-project-action { flex-direction: column; align-items: start; gap: 24px; }
  .water-heater .wh-library { padding-block: 55px; }
  .water-heater .wh-library-heading { flex-direction: column; align-items: start; gap: 0; margin-bottom: 28px; }
  .water-heater .wh-library-grid { grid-template-columns: 1fr; }
  .water-heater .wh-guide-row h3 { font-size: 24px; }
  .water-heater .wh-about-grid { grid-template-columns: 1fr; gap: 14px; }
  .water-heater .wh-footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .water-heater .footer-bottom { align-items: start; flex-direction: column; gap: 12px; }
  .water-heater .article-hero { padding: 35px 0 40px; }
  .water-heater .article-hero h1 { font-size: 37px; }
  .water-heater .prose { font-size: 16px; }
  .water-heater .article-cta .narrow { align-items: start; flex-direction: column; }
  .water-heater .article-cta .wh-article-action { max-width: 100%; }
  .water-heater .guide-grid { grid-template-columns: 1fr; }
}