/* The Hydronic Authority — shared stylesheet (redesigned) */
:root{
  --ink:#111827;
  --ink-2:#1f2937;
  --slate:#4b5563;
  --slate-light:#6b7280;
  --line:#ece7df;
  --paper:#faf7f2;
  --paper-2:#f3ede4;
  --white:#ffffff;
  --card:#ffffff;

  --indigo:#ea580c;
  --indigo-600:#c2410c;
  --indigo-50:#fff1e6;
  --teal:#d97706;
  --teal-600:#b45309;
  --teal-50:#ffedd5;
  --amber:#f59e0b;
  --amber-warm:#fb923c;

  --grad-hero:linear-gradient(135deg,#fff1e6 0%,#ffedd5 55%,#fff7ed 100%);
  --grad-brand:linear-gradient(120deg,var(--indigo),var(--teal));

  --link:var(--indigo);
  --link-hover:var(--indigo-600);

  --maxw:1120px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 10px 30px -12px rgba(31,41,55,.18);
  --shadow-lift:0 18px 44px -18px rgba(234,88,12,.35);
  font-size:16px;
}
@media (prefers-color-scheme:dark){
  :root{
    --ink:#f2f4f9;--ink-2:#e5e9f2;--slate:#b3bcce;--slate-light:#8b93a7;
    --line:#2e2820;--paper:#17140f;--paper-2:#1e1a13;--white:#100d08;--card:#18140e;
    --indigo:#fb923c;--indigo-600:#fdba74;--indigo-50:#2a1c12;
    --teal:#fbbf24;--teal-600:#fcd34d;--teal-50:#241a10;
    --amber:#fbbf24;
    --grad-hero:linear-gradient(135deg,#241812 0%,#2a1c10 55%,#241c14 100%);
    --link:var(--indigo);--link-hover:var(--indigo-600);
    --shadow:0 1px 2px rgba(0,0,0,.4),0 14px 34px -16px rgba(0,0,0,.6);
    --shadow-lift:0 18px 44px -18px rgba(0,0,0,.7);
    color-scheme:dark;
  }
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Apple Color Emoji",sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.72;
  -webkit-font-smoothing:antialiased;
}
.content p,.content li,.callout p,.lead{font-family:"Iowan Old Style","Palatino Linotype",Georgia,ui-serif,serif}
h1,h2,h3,h4{color:var(--ink);font-weight:800;line-height:1.18;letter-spacing:-.02em}
h1{font-size:clamp(2.1rem,5vw,3.15rem)}
h2{font-size:clamp(1.45rem,2.6vw,1.7rem);margin-top:2.6rem;margin-bottom:.9rem;position:relative;padding-left:16px}
h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:5px;border-radius:3px;background:var(--grad-brand)}
h3{font-size:1.2rem;margin-top:1.8rem;margin-bottom:.55rem}
p{margin-bottom:1.1rem}
ul,ol{margin:0 0 1.15rem 1.4rem}
li{margin-bottom:.5rem}
a{color:var(--link);text-decoration:underline;text-decoration-thickness:1.5px;text-decoration-color:color-mix(in srgb,var(--link) 40%,transparent);text-underline-offset:2px}
a:hover{color:var(--link-hover)}
strong{color:var(--ink);font-weight:700}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
img{max-width:100%;display:block}

/* header */
header.site{
  border-bottom:1px solid var(--line);
  background:color-mix(in srgb,var(--white) 82%,transparent);
  backdrop-filter:saturate(180%) blur(12px);
  position:sticky;top:0;z-index:50;
}
header.site .nav{display:flex;align-items:center;justify-content:space-between;height:70px;gap:16px;flex-wrap:wrap}
.brand{font-weight:800;font-size:1.14rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em;display:flex;align-items:center;gap:.6rem}
.brand:hover{color:var(--ink)}
.brand .mark{
  display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;flex:0 0 auto;
  filter:drop-shadow(0 4px 10px rgba(234,88,12,.45));
}
.brand .mark svg{display:block;width:28px;height:28px}
.nav-links{display:flex;gap:1.4rem;flex-wrap:wrap;align-items:center}
.nav-links a{font-size:.92rem;font-weight:600;color:var(--slate);text-decoration:none;position:relative;padding:4px 0}
.nav-links a:hover{color:var(--indigo)}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:2px;background:var(--grad-brand);border-radius:2px;transition:right .25s ease}
.nav-links a:hover::after{right:0}
.nav-links a.cta{background:var(--grad-brand);color:#fff;padding:.5rem 1rem;border-radius:999px;box-shadow:0 6px 16px -6px rgba(234,88,12,.6)}
.nav-links a.cta::after{display:none}
.nav-links a.cta:hover{color:#fff;filter:brightness(1.06)}

/* hero / page header */
.page-head{background:var(--grad-hero);border-bottom:1px solid var(--line);padding:60px 0;position:relative;overflow:hidden}
.page-head .kicker{font-size:.76rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-600);margin-bottom:.7rem;display:inline-flex;align-items:center;gap:.5rem}
.page-head .kicker::before{content:"";width:22px;height:2px;background:var(--teal);border-radius:2px}
.page-head p.lead{font-size:1.16rem;color:var(--slate);max-width:64ch;margin-top:1rem}

/* homepage hero layout */
.hero{display:grid;grid-template-columns:1.15fr .95fr;gap:40px;align-items:center}
.hero-art{position:relative}
.hero-art svg{width:100%;height:auto;filter:drop-shadow(0 20px 40px rgba(31,41,55,.15))}
@media(max-width:860px){.hero{grid-template-columns:1fr;gap:26px}.hero-art{order:-1;max-width:440px}}

/* content */
main{padding:52px 0 68px}
.content{max-width:74ch}
.content.wide{max-width:var(--maxw)}
.content p{color:var(--ink-2)}

/* directory / cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:22px;margin:1.8rem 0 2.2rem}
.card{
  border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:var(--card);
  text-decoration:none;display:block;transition:transform .22s cubic-bezier(.2,.7,.2,1),box-shadow .22s,border-color .22s;
  position:relative;overflow:hidden;
}
.card::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:var(--grad-brand);transform:scaleX(0);transform-origin:left;transition:transform .3s}
.card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--indigo) 45%,var(--line));box-shadow:var(--shadow-lift)}
.card:hover::before{transform:scaleX(1)}
.card .ico{width:44px;height:44px;border-radius:12px;background:var(--indigo-50);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.card .ico svg{width:24px;height:24px;stroke:var(--indigo);fill:none;stroke-width:1.8}
.card h3{margin-top:0;font-size:1.08rem;color:var(--ink)}
.card p{font-size:.93rem;color:var(--slate);margin-bottom:0}
.card.feature{background:linear-gradient(135deg,var(--indigo-50),var(--teal-50));border-color:color-mix(in srgb,var(--indigo) 30%,var(--line))}
.card.feature .ico{background:var(--white)}
.card .tag{display:inline-block;font-size:.68rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-600);background:var(--teal-50);padding:.2rem .55rem;border-radius:999px;margin-bottom:10px}

/* callout boxes */
.callout{background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--indigo);border-radius:var(--radius-sm);padding:20px 24px;margin:1.8rem 0}
.callout h4{margin:0 0 .4rem;font-size:1rem;color:var(--ink)}
.callout p{margin-bottom:0;font-size:.96rem;color:var(--slate)}
.callout.installer{border-left-color:var(--teal)}

/* figures / SVG diagrams */
.figure{margin:2rem 0;padding:26px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}
.figure svg{width:100%;height:auto;display:block}
.figure figcaption{margin-top:14px;font-size:.86rem;color:var(--slate-light);text-align:center;font-style:italic}
.diagram text{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}

/* tables (restyled) */
table{width:100%;border-collapse:separate;border-spacing:0;margin:1.6rem 0;font-size:.94rem;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
th,td{padding:13px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
tr:last-child td{border-bottom:none}
th{background:var(--paper-2);font-weight:800;color:var(--ink);font-size:.82rem;letter-spacing:.02em;text-transform:uppercase}
td:first-child{font-weight:700;color:var(--ink)}
tbody tr:hover td,table tr:hover td{background:color-mix(in srgb,var(--indigo-50) 60%,transparent)}

/* comparison bars */
.compare{margin:2rem 0;display:grid;gap:22px}
.cmp-row{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow)}
.cmp-row h4{font-size:.95rem;margin:0 0 4px}
.cmp-row .metric-note{font-size:.82rem;color:var(--slate-light);margin-bottom:14px}
.cmp-bar{display:grid;grid-template-columns:130px 1fr;gap:12px;align-items:center;margin-bottom:10px}
.cmp-bar:last-child{margin-bottom:0}
.cmp-bar .lbl{font-size:.85rem;font-weight:700;color:var(--slate)}
.cmp-bar .track{background:var(--paper-2);border-radius:999px;height:26px;position:relative;overflow:hidden}
.cmp-bar .fill{height:100%;border-radius:999px;width:0;transition:width 1.1s cubic-bezier(.2,.8,.2,1);display:flex;align-items:center;justify-content:flex-end;padding-right:10px;font-size:.78rem;font-weight:800;color:#fff}
.cmp-bar .fill.boiler{background:linear-gradient(90deg,var(--amber-warm),var(--amber))}
.cmp-bar .fill.hp{background:linear-gradient(90deg,var(--teal),var(--indigo))}
.reveal .cmp-bar .fill[data-w]{width:var(--w)}
.cmp-legend{display:flex;gap:18px;flex-wrap:wrap;font-size:.85rem;font-weight:600;color:var(--slate);margin:.4rem 0 1.4rem}
.cmp-legend span{display:inline-flex;align-items:center;gap:.45rem}
.cmp-legend i{width:14px;height:14px;border-radius:4px;display:inline-block}
.cmp-legend i.boiler{background:var(--amber)}
.cmp-legend i.hp{background:var(--teal)}

/* faq */
.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);padding:6px 20px;margin-bottom:12px;background:var(--card);transition:box-shadow .2s,border-color .2s}
.faq details[open]{box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--indigo) 30%,var(--line))}
.faq summary{font-weight:700;cursor:pointer;color:var(--ink);padding:12px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--indigo);transition:transform .2s;line-height:1}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin-top:.2rem;margin-bottom:.9rem;color:var(--slate)}

/* glossary */
dl.glossary dt{font-weight:800;color:var(--ink);margin-top:1.5rem;font-size:1.04rem}
dl.glossary dt::before{content:"";display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--grad-brand);margin-right:.55rem;vertical-align:middle}
dl.glossary dd{margin-left:0;color:var(--slate);margin-bottom:.3rem}

/* toc */
.toc{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 22px;margin:1.6rem 0;font-size:.92rem}
.toc h4{margin:0 0 .5rem;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-600)}
.toc ul{margin:0 0 0 1.1rem}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;background:var(--grad-brand);color:#fff;padding:.8rem 1.5rem;border-radius:999px;font-weight:700;font-size:.94rem;text-decoration:none;border:none;cursor:pointer;box-shadow:0 8px 20px -8px rgba(234,88,12,.6);transition:transform .15s,filter .15s}
.btn:hover{color:#fff;transform:translateY(-2px);filter:brightness(1.05)}
.btn.outline{background:transparent;color:var(--indigo);border:1.5px solid color-mix(in srgb,var(--indigo) 60%,transparent);box-shadow:none}

/* calculator */
.calc{display:grid;grid-template-columns:.95fr 1.1fr;gap:28px;margin:2rem 0;align-items:start}
@media(max-width:820px){.calc{grid-template-columns:1fr}}
.calc-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.calc-panel h3{margin-top:0}
.field{margin-bottom:18px}
.field label{display:block;font-size:.86rem;font-weight:700;color:var(--ink);margin-bottom:7px}
.field .val{float:right;color:var(--indigo);font-weight:800}
.field input[type=range]{width:100%;accent-color:var(--indigo);height:6px}
.field select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);font-size:.95rem;font-family:inherit}
.field select:focus{outline:2px solid var(--indigo);outline-offset:1px}
.result h3{margin-top:0}
.stat{display:flex;align-items:baseline;gap:.5rem;background:linear-gradient(135deg,var(--indigo-50),var(--teal-50));border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin-bottom:22px}
.stat .num{font-size:2.4rem;font-weight:800;letter-spacing:-.03em;background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat .unit{font-weight:700;color:var(--slate)}
.cost-bar{margin-bottom:14px}
.cost-bar .top{display:flex;justify-content:space-between;font-size:.88rem;font-weight:700;margin-bottom:6px}
.cost-bar .track{background:var(--paper-2);border-radius:999px;height:30px;overflow:hidden}
.cost-bar .fill{height:100%;border-radius:999px;transition:width .7s cubic-bezier(.2,.8,.2,1);display:flex;align-items:center;justify-content:flex-end;padding-right:12px;color:#fff;font-weight:800;font-size:.82rem;white-space:nowrap}
.cost-bar .fill.radiant{background:linear-gradient(90deg,var(--teal),var(--indigo))}
.cost-bar .fill.forced{background:linear-gradient(90deg,var(--slate-light),var(--slate))}
.assump{font-size:.82rem;color:var(--slate-light);margin-top:20px;border-top:1px dashed var(--line);padding-top:14px}
.assump strong{color:var(--slate)}

/* footer */
footer.site{background:#0c0f17;color:#aab3c6;padding:52px 0 30px;margin-top:52px;position:relative}
footer.site::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad-brand)}
footer.site .wrap{display:flex;flex-direction:column;gap:14px}
footer.site a{color:#c6cddb;text-decoration:none}
footer.site a:hover{color:#fff}
footer.site .foot-links{display:flex;gap:1.4rem;flex-wrap:wrap;font-size:.92rem;font-weight:600}
footer.site .tagline{font-size:.9rem;color:#8791a5;max-width:60ch}
footer.site .copyright{font-size:.82rem;color:#6b7488}

/* scroll reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

@media(max-width:720px){
  .nav-links{gap:1rem;font-size:.85rem;width:100%;justify-content:flex-start;order:3}
  .nav-links a{padding:2px 0}
  header.site .nav{height:auto;padding:12px 0}
  .page-head{padding:40px 0}
}
@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important}
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  .card:hover{transform:none}
  .cmp-bar .fill,.cost-bar .fill{transition:none}
  .float{animation:none!important}
}

/* hero SVG animation */
@keyframes dash{to{stroke-dashoffset:-140}}
.flow-path{stroke-dasharray:10 14;animation:dash 3s linear infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.float{animation:floaty 5s ease-in-out infinite}

/* Geo-aware installer banner */
.geo-banner{margin-top:1.4rem;padding:.9rem 1.15rem;border-radius:var(--radius-sm);font-size:.95rem;line-height:1.5}
.geo-banner.is-utah{background:var(--teal-50);border:1px solid color-mix(in srgb,var(--teal) 35%,transparent);color:var(--teal-600)}
.geo-banner.is-other{background:var(--paper);border:1px solid var(--line);color:var(--slate)}
.geo-note{margin:.25rem 0 1rem;font-size:.9rem;color:var(--slate-light);font-style:italic}
.callout.installer.deemphasized{opacity:.6;filter:grayscale(.4)}

/* Calculator savings hero — lead with the positive number, not scary totals */
.savings-hero{margin-top:1.4rem;padding:1.3rem 1.4rem;border-radius:14px;text-align:center;
  background:linear-gradient(135deg,rgba(245,158,11,.16),rgba(234,88,12,.14));
  border:1px solid rgba(234,88,12,.35)}
.savings-hero .save-label{display:block;font-size:.85rem;letter-spacing:.04em;text-transform:uppercase;color:var(--slate)}
.savings-hero .save-num{display:block;font-size:2.6rem;font-weight:800;line-height:1.05;margin:.15rem 0;
  background:linear-gradient(90deg,#f59e0b,#ea580c);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent}
.savings-hero .save-sub{display:block;font-size:.9rem;color:var(--slate)}

/* Heat-load sizing bar (radiant floor capacity check) */
.cap-bar{margin:.6rem 0 .3rem}
.cap-bar .top{display:flex;justify-content:space-between;font-size:.92rem;font-weight:600;margin-bottom:.45rem}
.cap-bar .track{height:14px;border-radius:8px;background:rgba(120,130,150,.18);overflow:hidden}
.cap-bar .fill{height:100%;border-radius:8px;transition:width .5s ease;background:linear-gradient(90deg,#fbbf24,#ea580c)}
.cap-bar .scale{display:flex;justify-content:space-between;gap:1rem;font-size:.72rem;color:var(--slate);margin-top:.4rem}

/* ============================================================
   PREMIUM DESIGN LAYER — depth, glow, motion, landing rhythm
   Warm ember/amber only. Dark-mode + reduced-motion aware.
   ============================================================ */
:root{
  --display:"SF Pro Display",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --ember:#ea580c;
  --ember-2:#f59e0b;
  --glow:0 0 0 1px color-mix(in srgb,var(--ember) 22%,transparent),0 18px 50px -22px rgba(234,88,12,.55);
  --glass-bg:color-mix(in srgb,var(--card) 78%,transparent);
  --glass-brd:color-mix(in srgb,var(--ember) 26%,var(--line));
  --shadow-soft:0 1px 2px rgba(16,24,40,.05),0 8px 24px -14px rgba(31,41,55,.20),0 30px 60px -34px rgba(31,41,55,.22);
}
@media (prefers-color-scheme:dark){
  :root{
    --ember:#fb923c;--ember-2:#fbbf24;
    --glass-bg:color-mix(in srgb,var(--card) 62%,transparent);
    --glass-brd:color-mix(in srgb,var(--ember) 30%,#2e2820);
    --shadow-soft:0 1px 2px rgba(0,0,0,.5),0 10px 30px -16px rgba(0,0,0,.7),0 40px 80px -40px rgba(0,0,0,.8);
  }
  body{background:radial-gradient(1200px 700px at 78% -8%,rgba(234,88,12,.10),transparent 60%),var(--white)}
}

/* --- Bold display typography --- */
h1,h2,h3,h4{font-family:var(--display)}
h1{font-weight:850;letter-spacing:-.035em;line-height:1.05;font-size:clamp(2.4rem,6vw,4rem);text-wrap:balance}
h2{font-weight:800;letter-spacing:-.03em}
h3{font-weight:800;letter-spacing:-.02em}
.page-head h1{background:linear-gradient(180deg,var(--ink),color-mix(in srgb,var(--ink) 72%,var(--ember)));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.content .lead:first-of-type,.page-head .lead{font-size:clamp(1.12rem,1.7vw,1.28rem);line-height:1.7}
.content>p:first-of-type{font-size:1.12rem}

/* refined content list markers — small ember glyphs */
.content ul{list-style:none;margin-left:0}
.content ul>li{position:relative;padding-left:1.7rem}
.content ul>li::before{content:"";position:absolute;left:.15rem;top:.62em;width:9px;height:9px;border-radius:3px;
  background:var(--grad-brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--ember) 14%,transparent);transform:rotate(45deg)}
.content ol{padding-left:.4rem}

/* --- Reading progress bar (injected by reveal.js) --- */
#read-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:60;
  background:linear-gradient(90deg,var(--ember-2),var(--ember));
  box-shadow:0 0 12px rgba(234,88,12,.7);transition:width .1s linear;border-radius:0 3px 3px 0}

/* --- Sticky header: condense + glow on scroll, active nav --- */
header.site{transition:height .25s,box-shadow .25s,background .25s}
header.site.scrolled{box-shadow:0 10px 30px -18px rgba(0,0,0,.45),0 1px 0 var(--line)}
header.site.scrolled .nav{height:58px}
.nav-links a.active{color:var(--ember)}
.nav-links a.active::after{right:0}

/* --- Ambient hero: warm radial glow + grain + floating embers --- */
.page-head{isolation:isolate}
.page-head::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(60% 90% at 82% 12%,color-mix(in srgb,var(--ember) 30%,transparent),transparent 60%),
    radial-gradient(48% 70% at 8% 96%,color-mix(in srgb,var(--ember-2) 26%,transparent),transparent 62%);
  opacity:.9}
.page-head::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.5;mix-blend-mode:overlay;
  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='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E")}
.embers{position:absolute;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.embers i{position:absolute;bottom:-12px;width:6px;height:6px;border-radius:50%;
  background:radial-gradient(circle,var(--ember-2),var(--ember));opacity:0;
  box-shadow:0 0 8px 1px color-mix(in srgb,var(--ember) 70%,transparent);
  animation:rise linear infinite}
@keyframes rise{
  0%{transform:translateY(0) scale(.7);opacity:0}
  12%{opacity:.9}
  85%{opacity:.7}
  100%{transform:translateY(-340px) translateX(var(--dx,0)) scale(1.1);opacity:0}}

/* homepage hero enhancements */
.hero .hero-copy h1{font-size:clamp(2.6rem,6.4vw,4.4rem)}
.hero-art::before{content:"";position:absolute;inset:-8% -6% -14% -6%;z-index:-1;border-radius:50%;
  background:radial-gradient(closest-side,color-mix(in srgb,var(--ember) 34%,transparent),transparent 72%);
  filter:blur(6px)}

/* --- Glass panels / gradient-border material --- */
.glass,.card,.callout,.calc-panel,.toc,.figure,.stat{position:relative}
.card,.calc-panel,.figure{background:var(--glass-bg);backdrop-filter:saturate(150%) blur(10px);
  border-color:var(--glass-brd);box-shadow:var(--shadow-soft)}
.card:hover{box-shadow:var(--glow),var(--shadow-soft)}

/* --- Homepage landing sections --- */
.band{padding:clamp(3rem,6vw,5rem) 0;position:relative}
.section-head{max-width:64ch}
.section-head .kicker{font-size:.76rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ember);margin-bottom:.6rem;display:inline-flex;align-items:center;gap:.5rem}
.section-head .kicker::before{content:"";width:22px;height:2px;background:var(--ember);border-radius:2px}
.section-head h2{padding-left:0;margin-top:.2rem}
.section-head h2::before{display:none}

/* benefits strip */
.benefits{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:20px;margin:2rem 0 .5rem}
.benefit{padding:22px;border-radius:var(--radius);border:1px solid var(--glass-brd);background:var(--glass-bg);
  backdrop-filter:saturate(150%) blur(10px);box-shadow:var(--shadow-soft);transition:transform .22s,box-shadow .22s}
.benefit:hover{transform:translateY(-4px);box-shadow:var(--glow),var(--shadow-soft)}
.benefit .bi{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;background:linear-gradient(135deg,color-mix(in srgb,var(--ember-2) 30%,var(--card)),color-mix(in srgb,var(--ember) 22%,var(--card)));
  box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--ember) 30%,transparent)}
.benefit .bi svg{width:24px;height:24px;stroke:var(--ember);fill:none;stroke-width:1.8}
.benefit h3{margin:0 0 .3rem;font-size:1.04rem}
.benefit p{margin:0;font-size:.92rem;color:var(--slate);font-family:inherit}

/* how it works — 3 connected steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin:2rem 0 .5rem;position:relative}
.steps::before{content:"";position:absolute;top:34px;left:14%;right:14%;height:2px;
  background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--ember) 55%,transparent),transparent);z-index:0}
.step{position:relative;z-index:1;text-align:center;padding:0 6px}
.step .num{width:64px;height:64px;margin:0 auto 16px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-family:var(--display);font-weight:850;font-size:1.5rem;color:#fff;background:var(--grad-brand);
  box-shadow:0 12px 28px -10px rgba(234,88,12,.7),inset 0 0 0 4px color-mix(in srgb,var(--white) 85%,transparent)}
.step h3{margin:.2rem 0 .35rem;font-size:1.06rem}
.step p{font-size:.92rem;color:var(--slate);font-family:inherit;margin:0}
@media(max-width:720px){.steps{grid-template-columns:1fr}.steps::before{display:none}}

/* closing CTA band */
.cta-band{position:relative;overflow:hidden;border-radius:var(--radius);padding:clamp(2.2rem,5vw,3.6rem);
  background:linear-gradient(135deg,#7c2d12,#c2410c 55%,#ea580c);color:#fff;text-align:center;
  box-shadow:0 30px 70px -30px rgba(234,88,12,.7)}
.cta-band::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(50% 120% at 50% -20%,rgba(255,220,150,.45),transparent 60%)}
.cta-band h2{color:#fff;padding:0;margin:0 auto .6rem;max-width:22ch}
.cta-band h2::before{display:none}
.cta-band p{color:rgba(255,255,255,.9);max-width:56ch;margin:0 auto 1.5rem;font-family:inherit}
.cta-band .btn{background:#fff;color:var(--ember-600,#c2410c);box-shadow:0 10px 30px -8px rgba(0,0,0,.4)}
.cta-band .btn:hover{color:#9a3412}
.cta-band .btn.outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6)}

/* --- Pull-quotes for guide pages --- */
.pullquote{font-family:var(--display);font-weight:800;letter-spacing:-.02em;line-height:1.28;
  font-size:clamp(1.3rem,2.4vw,1.7rem);color:var(--ink);margin:2.2rem 0;padding:.2rem 0 .2rem 1.4rem;
  border-left:4px solid transparent;border-image:var(--grad-brand) 1;position:relative}
.pullquote::before{content:"\201C";position:absolute;left:-.1rem;top:-1.4rem;font-size:3.4rem;line-height:1;
  color:color-mix(in srgb,var(--ember) 40%,transparent);font-family:Georgia,serif}

/* --- "Keep reading" related links row (injected before footer) --- */
.related{border-top:1px solid var(--line);margin-top:3rem;padding-top:2rem}
.related .kicker{font-size:.76rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--ember);margin-bottom:1rem;display:block}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.related-grid a{display:block;padding:18px 20px;border-radius:var(--radius-sm);text-decoration:none;
  border:1px solid var(--glass-brd);background:var(--glass-bg);backdrop-filter:blur(8px);
  color:var(--ink);font-weight:700;transition:transform .2s,box-shadow .2s;box-shadow:var(--shadow-soft)}
.related-grid a::after{content:" →";color:var(--ember)}
.related-grid a:hover{transform:translateY(-3px);box-shadow:var(--glow),var(--shadow-soft)}

/* --- Button ember-glow hover --- */
.btn{transition:transform .18s cubic-bezier(.2,.7,.2,1),box-shadow .22s,filter .18s}
.btn:not(.outline):hover{box-shadow:0 12px 30px -8px rgba(234,88,12,.75),0 0 0 1px color-mix(in srgb,var(--ember) 40%,transparent)}
.btn.outline:hover{background:color-mix(in srgb,var(--ember) 10%,transparent);box-shadow:0 0 0 1px color-mix(in srgb,var(--ember) 40%,transparent)}

/* --- Featured estimator card really pops --- */
.card.feature{background:linear-gradient(135deg,color-mix(in srgb,var(--ember) 16%,var(--card)),color-mix(in srgb,var(--ember-2) 14%,var(--card)));
  border-color:color-mix(in srgb,var(--ember) 40%,var(--line));box-shadow:var(--glow),var(--shadow-soft)}
.card.feature::after{content:"";position:absolute;width:200px;height:200px;border-radius:50%;right:-60px;top:-60px;
  background:radial-gradient(closest-side,color-mix(in srgb,var(--ember) 30%,transparent),transparent);pointer-events:none}
.card.feature:hover{transform:translateY(-6px)}

/* --- Estimator big number glow --- */
.stat{box-shadow:var(--glow),var(--shadow-soft);background:linear-gradient(135deg,color-mix(in srgb,var(--ember) 14%,var(--card)),color-mix(in srgb,var(--ember-2) 12%,var(--card)))}
.stat .num{font-family:var(--display)}

/* --- Figures: framed, glowing --- */
.figure{background:var(--glass-bg);box-shadow:var(--shadow-soft)}
.figure::before{content:"";position:absolute;inset:0;border-radius:var(--radius);pointer-events:none;
  background:radial-gradient(120% 80% at 50% 120%,color-mix(in srgb,var(--ember) 10%,transparent),transparent 60%)}

/* --- Polished multi-column footer --- */
footer.site{background:linear-gradient(180deg,#120a06,#0b0705)}
footer.site .wrap{display:grid;grid-template-columns:1.4fr 1fr;gap:32px 40px;align-items:start}
footer.site .foot-brand{display:flex;flex-direction:column;gap:12px}
footer.site .foot-brand .fb-mark{display:flex;align-items:center;gap:.6rem;font-family:var(--display);
  font-weight:800;font-size:1.12rem;color:#fff;letter-spacing:-.02em}
footer.site .foot-brand .fb-mark svg{width:30px;height:30px;filter:drop-shadow(0 4px 12px rgba(234,88,12,.6))}
footer.site .tagline{margin:0;color:#9b8f84}
footer.site .foot-links{flex-direction:column;gap:.7rem;display:flex}
footer.site .foot-cols{display:grid;grid-template-columns:1fr;gap:8px}
footer.site .foot-h{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:#c98a52;font-weight:800;margin-bottom:.4rem}
footer.site .copyright{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.08);padding-top:16px;margin-top:6px;color:#7a6f65}
@media(max-width:640px){footer.site .wrap{grid-template-columns:1fr}}

/* --- Reduced-motion: kill added animations --- */
@media(prefers-reduced-motion:reduce){
  .embers i{animation:none!important;opacity:0!important}
  #read-progress{transition:none!important}
  .benefit:hover,.card.feature:hover,.related-grid a:hover,.btn:hover{transform:none}
  .page-head h1{-webkit-text-fill-color:currentColor;background:none}
}

/* Rounder guide cards + circular icon tiles — deliberately unlike Phillips' squares */
.card-grid .card{border-radius:28px}
.card-grid .card .ico{border-radius:50%}