:root {
  --bg:#0b0c10; --card:#14161c; --line:#2a2e38; --text:#e8e6e1;
  --muted:#9a958b; --fire:#ff6a1a; --fire2:#ffb347;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Manrope,system-ui,sans-serif;background:var(--bg);color:var(--text)}
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:24px;padding:14px 6vw;background:rgba(11,12,16,.8);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.logo{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}
.logo-mark{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(145deg,var(--fire),#a30);font-family:Unbounded,sans-serif;font-weight:700}
.logo strong{display:block;font-family:Unbounded,sans-serif;font-size:14px}
.logo small{color:var(--muted);font-size:11px}
nav{margin-left:auto;display:flex;gap:20px}
nav a{color:var(--muted);text-decoration:none;font-weight:600}
.hero{padding:56px 6vw 24px;max-width:1000px}
.eyebrow{color:var(--fire2);font-weight:700;letter-spacing:.12em;text-transform:uppercase;font-size:12px;margin-bottom:14px}
h1{font-family:Unbounded,sans-serif;font-size:clamp(32px,5vw,64px);line-height:.95}
h1 span{color:var(--fire)}
.lead{margin-top:16px;color:var(--muted);max-width:640px;font-size:17px}
.calc-wrap{padding:10px 4vw 60px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:20px}
.tabs,.chips,.heat-btns{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.tabs button,.chips button,.heat-btns button{
  background:#0e1015;border:1px solid var(--line);color:var(--text);
  border-radius:999px;padding:8px 12px;cursor:pointer;font:inherit;font-weight:650;font-size:13px
}
.tabs button.on,.chips button.on,.heat-btns button.on{background:var(--fire);color:#1a0b04;border-color:transparent}
.row-label{font-size:12px;color:var(--muted);margin:8px 0 8px;text-transform:uppercase;letter-spacing:.06em}
.split{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
.dims{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:8px 0 16px}
label{display:grid;gap:5px;font-size:12px;color:var(--muted)}
input{background:#0e1015;border:1px solid var(--line);border-radius:10px;color:var(--text);padding:10px;font:inherit}
.check{display:flex;align-items:center;gap:8px;margin:8px 0 12px;color:var(--text);font-size:14px}
.check input{width:auto}
.heat-row{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
#schema{background:#0e1015;border:1px solid var(--line);border-radius:14px}
.results{display:grid;gap:10px;align-content:start}
.kpi{background:#0e1015;border:1px solid var(--line);border-radius:16px;padding:16px}
.kpi span{color:var(--muted);font-size:12px}
.kpi b{display:inline-block;font-family:Unbounded,sans-serif;font-size:36px;margin-right:8px}
.kpi i{color:var(--fire);font-style:normal}
.kpi-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.kpi-grid div{background:#0e1015;border:1px solid var(--line);border-radius:12px;padding:10px}
.kpi-grid span{display:block;color:var(--muted);font-size:11px}
.kpi-grid b{font-size:18px}
.kpi-grid i{font-style:normal;color:var(--muted);font-size:11px;margin-left:4px}
.coat{margin-top:22px}
.coat-head h3{font-family:Unbounded,sans-serif;margin-bottom:6px}
.coat-head p{color:var(--muted);font-size:13px;margin-bottom:12px}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;background:#0e1015}
.how{padding:10px 6vw 70px}
.how h2{font-family:Unbounded,sans-serif;margin-bottom:16px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.cards article{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}
.cards span{color:var(--fire);font-family:Unbounded,sans-serif;font-size:12px}
.cards p{color:var(--muted);margin-top:6px}
footer{border-top:1px solid var(--line);padding:24px 6vw 40px;color:var(--muted);font-size:13px}
@media(max-width:900px){
  .split,.cards,.dims,.kpi-grid{grid-template-columns:1fr}
  nav{display:none}
}