/* Heatmark marketing site. Tokens from brand.json. Dark (mill-scale) is the default theme. */
:root{
  --bg:#111315;--surface:#1B1F23;--surface-2:#22272C;--line:#2E343A;--line-2:#3A4148;
  --text:#ECEAE6;--muted:#9AA3AB;--primary:#E8692B;--primary-ink:#160A03;--accent:#F2C230;
  --ok:#3FB97A;--bad:#F06368;--ev:#5FB3E8;--as:#F2C230;--uv:#C79BE8;
  --shadow:0 1px 0 rgba(255,255,255,.03) inset,0 10px 30px rgba(0,0,0,.35);
  --grid:rgba(255,255,255,.035);
  --radius:10px;--wrap:1160px;
  --f-head:"Barlow Condensed",Impact,"Arial Narrow",sans-serif;
  --f-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  color-scheme:dark;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#F5F3EF;--surface:#FFFFFF;--surface-2:#EEEBE5;--line:#DDD8CF;--line-2:#C9C3B8;
    --text:#1A1C1E;--muted:#5C646B;--primary:#B4461A;--primary-ink:#FFFFFF;--accent:#8A6300;
    --ok:#17734A;--bad:#C8323A;--ev:#1F6FA8;--as:#8A6300;--uv:#7B48A8;
    --shadow:0 1px 2px rgba(0,0,0,.05),0 8px 24px rgba(0,0,0,.06);--grid:rgba(0,0,0,.04);color-scheme:light;
  }
}
:root[data-theme="light"]{
  --bg:#F5F3EF;--surface:#FFFFFF;--surface-2:#EEEBE5;--line:#DDD8CF;--line-2:#C9C3B8;
  --text:#1A1C1E;--muted:#5C646B;--primary:#B4461A;--primary-ink:#FFFFFF;--accent:#8A6300;
  --ok:#17734A;--bad:#C8323A;--ev:#1F6FA8;--as:#8A6300;--uv:#7B48A8;
  --shadow:0 1px 2px rgba(0,0,0,.05),0 8px 24px rgba(0,0,0,.06);--grid:rgba(0,0,0,.04);color-scheme:light;
}
:root[data-theme="dark"]{color-scheme:dark}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--text);font:400 16px/1.6 var(--f-body);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:48px 48px;background-attachment:fixed;overflow-x:hidden}
img,svg{max-width:100%}
a{color:var(--primary)}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
h1,h2,h3,h4{font-family:var(--f-head);font-weight:700;line-height:1.05;letter-spacing:.01em;margin:0 0 .5em;text-wrap:balance}
h1{font-size:clamp(2.6rem,6.4vw,4.8rem);text-transform:uppercase}
h2{font-size:clamp(2rem,4vw,2.9rem);text-transform:uppercase}
h3{font-size:1.45rem}
p{margin:0 0 1em}
.mono,code,kbd{font-family:var(--f-mono)}
.mark{font-family:var(--f-mono);color:var(--accent);font-weight:600}
.muted{color:var(--muted)}
.small{font-size:.875rem}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}
@media (min-width:720px){.wrap{padding:0 28px}}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#111;padding:8px 12px;z-index:100;border-radius:6px}
.skip:focus{left:8px}
.mt1{margin-top:.75rem}.mt2{margin-top:1.5rem}.mt3{margin-top:2.5rem}

/* Header */
.concept-strip{background:#F2C230;color:#141100;font:600 .8rem/1.3 var(--f-body);text-align:center;padding:6px 16px}
.concept-strip a{color:inherit}
.site-head{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.head-row{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font:700 1.55rem/1 var(--f-head);letter-spacing:.04em;text-transform:uppercase;flex-shrink:0}
.brand svg{width:30px;height:30px}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{color:var(--muted);text-decoration:none;padding:8px 10px;border-radius:6px;font-weight:500;font-size:.95rem}
.nav a:hover{color:var(--text);background:var(--surface)}
.nav a[aria-current="page"]{color:var(--text);box-shadow:inset 0 -2px 0 var(--primary)}
.head-actions{display:flex;gap:8px;align-items:center}
.icon-btn{width:40px;height:40px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--text);display:grid;place-items:center;cursor:pointer}
.menu-btn{display:none}
@media (max-width:980px){
  .menu-btn{display:grid}
  .nav{position:absolute;left:0;right:0;top:64px;flex-direction:column;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 16px 16px;display:none}
  .nav.open{display:flex}
  .nav a{padding:12px 10px;font-size:1.05rem}
  .head-actions{margin-left:auto}
}
@media (max-width:420px){.head-actions .btn-sm{display:none}}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:8px;font:600 1rem/1.1 var(--f-body);text-decoration:none;border:1px solid transparent;cursor:pointer;min-height:44px}
.btn-primary{background:var(--primary);color:var(--primary-ink)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-2)}
.btn-ghost:hover{background:var(--surface)}
.btn-sm{padding:8px 14px;min-height:38px;font-size:.9rem}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* Sections */
section{padding:72px 0}
section.tight{padding:48px 0}
.eyebrow{font:600 .78rem/1 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:14px;display:block}
.lede{font-size:1.15rem;color:var(--muted);max-width:62ch}
.section-head{max-width:760px;margin-bottom:36px}
.band{background:var(--surface);border-block:1px solid var(--line)}

/* Hero */
.hero{padding:56px 0 64px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;gap:32px}}
.hero h1 em{font-style:normal;color:var(--primary)}
.status-pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line-2);border-radius:999px;padding:6px 12px;font-size:.85rem;color:var(--muted);margin-bottom:20px;background:var(--surface)}
.status-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}
.hero-art{border:1px solid var(--line);border-radius:14px;background:var(--surface);overflow:hidden;box-shadow:var(--shadow);aspect-ratio:5/4}
.hero-art svg{display:block;width:100%;height:100%}

/* Cards & grids */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);min-width:0}
.card h3{margin-top:0}
.card.flat{box-shadow:none}
.step-num{font:700 2.6rem/1 var(--f-head);color:var(--primary);display:block;margin-bottom:8px}
.kpi{font:700 2.4rem/1 var(--f-head);color:var(--text);display:block}
.kpi-label{color:var(--muted);font-size:.9rem}

/* Evidence / assumption labels */
.tag{display:inline-block;font:600 .68rem/1 var(--f-mono);letter-spacing:.06em;text-transform:uppercase;padding:4px 6px;border-radius:4px;border:1px solid currentColor;vertical-align:2px;white-space:nowrap}
.tag.ev{color:var(--ev)}.tag.as{color:var(--as)}.tag.uv{color:var(--uv)}.tag.est{color:var(--primary)}
.lbl{font:600 .78em/1 var(--f-mono);padding:2px 5px;border-radius:3px;border:1px solid currentColor}
.lbl-ev{color:var(--ev)}.lbl-as{color:var(--as)}.lbl-uv{color:var(--uv)}
.cite{font:500 .8em var(--f-mono);text-decoration:none;white-space:nowrap}
.legend-row{display:flex;flex-wrap:wrap;gap:14px;font-size:.88rem;color:var(--muted);align-items:center}

/* Problem list */
.fact{display:grid;grid-template-columns:auto 1fr;gap:14px;padding:18px 0;border-top:1px solid var(--line)}
.fact:first-child{border-top:0}
.fact .big{font:700 2rem/1 var(--f-head);color:var(--accent);min-width:110px}

/* Pricing */
.price-card{display:flex;flex-direction:column}
.price-card .amt{font:700 3.2rem/1 var(--f-head)}
.price-card .amt small{font:500 1rem var(--f-body);color:var(--muted)}
.price-card ul{padding-left:1.1em;margin:12px 0 20px;flex:1}
.price-card li{margin:6px 0}
.price-card.feature{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary),var(--shadow)}
.ribbon{font:600 .72rem/1 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--primary);margin-bottom:10px}

/* Tables */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);margin:1rem 0 1.5rem;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:.92rem}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-weight:600;color:var(--muted);background:var(--surface-2);font-size:.82rem;text-transform:uppercase;letter-spacing:.04em}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;font-family:var(--f-mono);font-size:.88rem;white-space:nowrap}
tr.hl td{background:color-mix(in srgb,var(--primary) 10%,transparent);font-weight:600}
.neg{color:var(--bad)}.pos{color:var(--ok)}

/* Forms / tools */
.tool{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:var(--shadow)}
.tool-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:28px}
@media (max-width:860px){.tool-grid{grid-template-columns:1fr}}
.field{display:block;margin-bottom:16px}
.field > span{display:flex;justify-content:space-between;gap:10px;font-weight:500;font-size:.92rem;margin-bottom:6px}
.field output{font-family:var(--f-mono);color:var(--accent)}
input[type=range]{width:100%;accent-color:var(--primary);height:28px}
input[type=number],input[type=text],input[type=email],select{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--line-2);background:var(--bg);color:var(--text);font:inherit;min-height:44px}
.seg{display:inline-flex;border:1px solid var(--line-2);border-radius:9px;padding:3px;background:var(--bg);flex-wrap:wrap}
.seg button{border:0;background:transparent;color:var(--muted);font:600 .95rem var(--f-body);padding:9px 16px;border-radius:6px;cursor:pointer;min-height:40px}
.seg button[aria-pressed="true"]{background:var(--primary);color:var(--primary-ink)}
.check{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px;font-size:.95rem;cursor:pointer}
.check input{width:20px;height:20px;accent-color:var(--primary);margin-top:2px;flex-shrink:0}
.result-row{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line)}
.result-row strong{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.chart-box{position:relative;height:300px}
@media (max-width:620px){.chart-box{height:240px}}
.callout{border-left:4px solid var(--accent);background:var(--surface-2);padding:14px 18px;border-radius:0 8px 8px 0;margin:1rem 0}
.callout.warn{border-color:var(--bad)}
.callout.ok{border-color:var(--ok)}
.callout p:last-child{margin-bottom:0}

/* FAQ */
details{border-top:1px solid var(--line);padding:4px 0}
details:last-child{border-bottom:1px solid var(--line)}
summary{cursor:pointer;padding:16px 28px 16px 0;font-weight:600;font-size:1.05rem;list-style:none;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:4px;top:12px;font:600 1.4rem var(--f-mono);color:var(--primary)}
details[open] summary::after{content:"\2212"}
details > div{padding:0 0 16px;color:var(--muted)}

/* CTA */
.cta{background:linear-gradient(135deg,color-mix(in srgb,var(--primary) 22%,var(--surface)),var(--surface));border:1px solid var(--line);border-radius:16px;padding:40px;display:grid;grid-template-columns:1.4fr 1fr;gap:24px;align-items:center}
@media (max-width:760px){.cta{grid-template-columns:1fr;padding:28px 20px}}

/* Sources */
.sources{font-size:.85rem;color:var(--muted)}
.sources li{margin:4px 0;overflow-wrap:anywhere}

/* Footer */
.site-foot{border-top:1px solid var(--line);padding:40px 0 48px;margin-top:40px;color:var(--muted);font-size:.9rem;background:var(--bg)}
.foot-grid{display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px}
.foot-links{display:flex;flex-wrap:wrap;gap:6px 18px}
.foot-links a{color:var(--muted)}

/* Plan page */
.plan-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:40px;align-items:start}
@media (max-width:980px){.plan-layout{grid-template-columns:1fr}}
.toc{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 14px;font-size:.88rem}
@media (max-width:980px){.toc{position:static;max-height:none}}
.toc ol{margin:0;padding-left:0;list-style:none}
.toc a{color:var(--muted);text-decoration:none;display:block;padding:5px 8px;border-radius:5px}
.toc a:hover,.toc a.active{color:var(--text);background:var(--surface-2)}
.prose{max-width:78ch;min-width:0}
.prose h2{margin-top:2.4em;padding-top:.6em;border-top:2px solid var(--line);font-size:clamp(1.8rem,3.4vw,2.4rem)}
.prose h3{margin-top:1.8em}
.prose li{margin:.3em 0}
.prose ul ul,.prose ol ul{margin:.3em 0}
.prose hr{border:0;border-top:1px solid var(--line);margin:2rem 0}
.prose table{font-size:.86rem}
.prose td,.prose th{padding:8px 10px}
.prose a{overflow-wrap:anywhere}
.src-id{font-family:var(--f-mono);color:var(--accent)}

/* Misc */
.diagram{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;overflow-x:auto}
.diagram svg{display:block;min-width:620px;width:100%;height:auto}
.screen{border:1px solid var(--line-2);border-radius:12px;overflow:hidden;background:var(--bg);box-shadow:var(--shadow)}
.screen-bar{display:flex;gap:6px;padding:8px 12px;background:var(--surface-2);border-bottom:1px solid var(--line);font:500 .75rem var(--f-mono);color:var(--muted);align-items:center}
.screen-bar i{width:9px;height:9px;border-radius:50%;background:var(--line-2);display:inline-block}
.demo-tag{background:var(--accent);color:#141100;font:700 .66rem/1 var(--f-mono);padding:3px 6px;border-radius:3px;letter-spacing:.06em;margin-left:auto}
.fade-in{animation:fade .6s ease both}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.prob{font-family:var(--f-head);font-size:1.9rem;font-weight:700;color:var(--primary)}
.verdict{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;align-items:baseline}
.verdict .v{font:700 .78rem/1 var(--f-mono);padding:5px 8px;border-radius:4px;text-transform:uppercase;letter-spacing:.06em}
.v.fail{background:color-mix(in srgb,var(--bad) 20%,transparent);color:var(--bad)}
.v.pass{background:color-mix(in srgb,var(--ok) 20%,transparent);color:var(--ok)}
.v.cond{background:color-mix(in srgb,var(--accent) 20%,transparent);color:var(--accent)}
.prose h1{font-size:clamp(1.9rem,3.6vw,2.6rem)}