:root{
  --wine:#6d1734;
  --wine2:#8e294c;
  --rose:#f4e6eb;
  --ink:#171b20;
  --muted:#66707a;
  --line:#ded9d6;
  --paper:#fff;
  --bg:#f5f2ee;
  --soft:#ece8e4;
  --green:#176344;
  --amber:#8a5a00;
  --shadow:0 18px 60px rgba(35,27,30,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.55}
a{color:inherit}
button,input{font:inherit}
.site-header{max-width:1240px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:22px 28px;gap:24px}
.site-header.compact{padding-bottom:8px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--wine);color:#fff;font:800 12px/1 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.06em}
.brand strong,.brand small{display:block}
.brand small{font-size:11px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.site-header nav{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;font-weight:700;color:#49515a}
.site-header nav a{text-decoration:none}
.site-header nav a:hover,.text-link:hover,.link-row a:hover,.site-footer a:hover{text-decoration:underline}
.hero-shell{max-width:1240px;margin:20px auto 0;padding:64px 28px 80px;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(320px,.7fr);gap:70px;align-items:center}
.kicker{font:800 12px/1.2 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.16em;color:var(--wine);margin:0 0 16px;text-transform:uppercase}
.hero-copy h1{font-size:clamp(42px,6vw,74px);line-height:.98;letter-spacing:-.055em;margin:0;max-width:820px}
.hero-copy h1 em{font-style:normal;color:var(--wine)}
.hero-lead{font-size:19px;color:#4c555f;max-width:760px;margin:26px 0}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.button{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:12px 16px;font-weight:800;text-decoration:none;border:1px solid transparent;cursor:pointer}
.button.primary{background:var(--wine);color:#fff}
.button.secondary{background:#fff;color:var(--ink);border-color:var(--line)}
.button.small{padding:9px 12px;font-size:13px}
.trust-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}
.trust-row span{font-size:12px;color:var(--muted);background:#fff;border:1px solid var(--line);padding:6px 9px;border-radius:999px}
.hero-card{background:#14171b;color:#eef0f2;border-radius:22px;padding:24px;box-shadow:var(--shadow)}
.terminal-label{font:800 11px/1 ui-monospace,SFMono-Regular,Menlo,monospace;color:#e9a9be;letter-spacing:.15em}
.hero-card pre{white-space:pre-wrap;font:13px/1.9 ui-monospace,SFMono-Regular,Menlo,monospace;margin:20px 0;color:#d9dee3}
.terminal-foot{font-size:12px;color:#8f9aa5;border-top:1px solid #2c3238;padding-top:15px;margin-bottom:0}
.section{max-width:1240px;margin:auto;padding:82px 28px}
.section-heading{max-width:760px;margin-bottom:32px}
.section-heading h2,.evidence-section h2{font-size:clamp(30px,4vw,48px);line-height:1.02;letter-spacing:-.04em;margin:0}
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.tool-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;min-height:360px;display:flex;flex-direction:column}
.tool-card.featured{border-color:#b98a9a;box-shadow:var(--shadow)}
.tool-card.muted-card{background:#f1eeeb}
.tool-topline{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font:700 11px/1 ui-monospace,SFMono-Regular,Menlo,monospace}
.status{padding:5px 7px;border-radius:999px}
.status.live{background:#e8f3ed;color:var(--green)}
.status.planned{background:#ece8e4;color:#69717a}
.tool-card h3{font-size:28px;letter-spacing:-.03em;margin:22px 0 8px}
.tool-card p,.tool-card li{color:#59636d;font-size:14px}
.tool-card ul{padding-left:18px;margin:8px 0 24px}
.text-link{font-weight:800;color:var(--wine);text-decoration:none;margin-top:auto}
.method-section{padding-top:30px}
.method-flow{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.method-flow div{background:#fff;border:1px solid var(--line);border-radius:15px;padding:16px;min-height:140px}
.method-flow span{font:800 11px/1 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--wine)}
.method-flow strong,.method-flow small{display:block}
.method-flow strong{margin:18px 0 4px}
.method-flow small{color:var(--muted);font-size:12px}
.method-note-large{margin-top:16px;background:#171b20;color:#eef1f3;border-radius:18px;padding:24px}
.method-note-large p{color:#b9c1c8;margin-bottom:0}
.evidence-section{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start;border-top:1px solid var(--line)}
.evidence-copy p{margin-top:0;color:#59636d}
.link-row{display:flex;gap:18px;flex-wrap:wrap;font-weight:800;color:var(--wine)}
.site-footer{max-width:1240px;margin:30px auto 0;border-top:1px solid var(--line);padding:28px;display:flex;justify-content:space-between;gap:30px;color:var(--muted);font-size:13px}
.site-footer strong{color:var(--ink)}
.site-footer p{margin:3px 0}
.site-footer>div:last-child{display:flex;gap:16px;flex-wrap:wrap}
.site-footer a{text-decoration:none}

.tool-shell{max-width:980px;margin:auto;padding:46px 28px 90px}
.tool-hero{margin-bottom:26px}
.tool-hero h1{font-size:clamp(38px,6vw,64px);letter-spacing:-.055em;line-height:1;margin:0 0 14px}
.tool-hero>p:not(.kicker){color:#58626c;font-size:18px;max-width:760px}
.notice{border-radius:13px;padding:13px 15px;margin:18px 0;font-size:14px}
.notice.neutral{background:#eee9e5;border:1px solid #d9d0cb;color:#514b48}
.notice.warning{background:#fff3d8;border:1px solid #ead09a;color:var(--amber)}
.calculator-card,.formula-card,.safety-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;margin:14px 0;box-shadow:0 8px 30px rgba(35,27,30,.04)}
.calculator-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:18px}
.calculator-heading h2,.formula-card h2{margin:5px 0 0;font-size:28px;letter-spacing:-.03em}
.step-tag{font:800 11px/1 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--wine);letter-spacing:.1em}
.calc-rows{display:grid;gap:9px}
.calc-row{display:grid;grid-template-columns:34px minmax(180px,1.1fr) 130px minmax(200px,1fr) 42px;gap:10px;align-items:end;background:#faf9f7;border:1px solid var(--line);border-radius:14px;padding:12px}.row-index{width:30px;height:30px;border-radius:9px;background:#eee8e4;color:var(--wine);display:grid;place-items:center;font:800 11px/1 ui-monospace,SFMono-Regular,Menlo,monospace;align-self:center}
label{font-weight:750;font-size:13px;color:#343b42;display:grid;gap:6px}
input{width:100%;border:1px solid #d1ccc9;border-radius:10px;padding:10px 11px;background:#fff;color:var(--ink)}
input:focus{outline:2px solid rgba(109,23,52,.18);border-color:var(--wine)}
.icon-button{width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:22px;color:#7a4e5d;cursor:pointer}
.result-shell{margin-top:16px;border:1px dashed #c8c0bc;border-radius:14px;padding:16px;min-height:72px}
.muted{color:var(--muted);margin:0}
.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.metric-grid.single{grid-template-columns:1fr}
.metric-grid div{background:#171b20;color:#fff;border-radius:13px;padding:16px}
.metric-grid span,.metric-grid strong{display:block}
.metric-grid span{font-size:11px;color:#aeb8c0;text-transform:uppercase;letter-spacing:.08em}
.metric-grid strong{font-size:30px;margin-top:4px}
.table-wrap{overflow:auto;margin-top:14px}
table{width:100%;border-collapse:collapse;min-width:760px;font-size:12px}
th,td{padding:9px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{color:#56606a;background:#f5f3f0}
.method-note,.section-intro{font-size:13px;color:var(--muted)}
.calculator-actions{display:flex;gap:9px;margin-top:14px}
.inverse-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.formula-card{display:grid;grid-template-columns:.7fr 1.3fr;gap:40px}
.formula-copy code{display:block;background:#15181c;color:#f3d7e0;border-radius:12px;padding:13px;margin:10px 0;font-size:13px;overflow:auto}
.safety-card{background:#f0ece8;box-shadow:none}
.safety-card p{margin-bottom:0;color:#5e5652}

@media(max-width:900px){
  .hero-shell{grid-template-columns:1fr;padding-top:38px;gap:30px}
  .tool-grid{grid-template-columns:1fr}
  .method-flow{grid-template-columns:repeat(2,1fr)}
  .evidence-section{grid-template-columns:1fr;gap:20px}
  .formula-card{grid-template-columns:1fr}
}
@media(max-width:680px){
  .site-header{padding:16px;align-items:flex-start}
  .site-header nav{justify-content:flex-end;gap:10px;font-size:12px}
  .hero-shell,.section,.tool-shell{padding-left:16px;padding-right:16px}
  .hero-shell{padding-bottom:52px}
  .hero-copy h1{font-size:44px}
  .calc-row{grid-template-columns:34px 1fr 42px}
  .calc-row .row-index{grid-column:1;grid-row:1}
  .calc-row label:nth-of-type(1){grid-column:2;grid-row:1}
  .calc-row label:nth-of-type(2){grid-column:1/-1;grid-row:2}
  .calc-row label:nth-of-type(3){grid-column:1/-1;grid-row:3}
  .calc-row .icon-button{grid-column:3;grid-row:1}
  .metric-grid{grid-template-columns:1fr}
  .inverse-grid{grid-template-columns:1fr}
  .calculator-heading{display:block}
  .calculator-heading .button{margin-top:12px}
  .method-flow{grid-template-columns:1fr}
  .site-footer{display:block}
  .site-footer>div:last-child{margin-top:14px}
}