:root{
  --bg:#f5f5f3; --surface:#ffffff; --ink:#1d2126; --muted:#5b636d; --line:#d9dcdf;
  --steel:#2b3139; --steel-2:#3a424c; --accent:#e8630a; --accent-ink:#ffffff; --ok:#1f7a4d; --warn:#b3261e;
  --radius:10px; --max:1120px;
  font-family: system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#15181c; --surface:#1d2127; --ink:#e8eaed; --muted:#9aa3ad; --line:#2f353d; --steel:#0f1216; --steel-2:#1a1f25; }
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--accent)}
img{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}

/* header */
.site-head{background:var(--steel);color:#fff;border-bottom:3px solid var(--accent)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;flex-wrap:wrap}
.brand{color:#fff;text-decoration:none;font-weight:800;font-size:1.25rem;letter-spacing:.2px;display:flex;align-items:center;gap:10px}
.brand .mark{width:28px;height:28px;border-radius:6px;background:var(--accent);display:grid;place-items:center;font-size:.8rem;color:#fff}
.brand span.src{color:var(--accent)}
.nav{display:flex;gap:18px;flex-wrap:wrap}
.nav a{color:#d7dbe0;text-decoration:none;font-weight:500}
.nav a:hover,.nav a[aria-current=page]{color:#fff}

/* hero */
.hero{background:linear-gradient(135deg,var(--steel) 0%,var(--steel-2) 100%);color:#fff;padding:64px 0 56px}
.hero h1{font-size:clamp(1.9rem,4.5vw,3rem);line-height:1.1;margin:0 0 14px;max-width:760px}
.hero p{font-size:1.15rem;color:#c9ced4;max-width:640px;margin:0 0 26px}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:12px 20px;border-radius:8px;text-decoration:none;font-weight:700;border:0;cursor:pointer;font-size:1rem}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;border:1.5px solid #8b939c;color:#fff}
.btn.sm{padding:8px 14px;font-size:.92rem}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}

/* sections */
section{padding:48px 0}
h2{font-size:1.6rem;margin:0 0 8px}
.lede{color:var(--muted);margin:0 0 24px;max-width:680px}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:8px}
.card h3{margin:0;font-size:1.12rem}
.card p{margin:0;color:var(--muted)}
.card .spacer{flex:1}
.tag{display:inline-block;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--accent)}
.price{font-size:1.4rem;font-weight:800}

/* tool layout */
.page-head{padding-top:36px;padding-bottom:8px}
.page-head h1{margin:0 0 6px;font-size:clamp(1.6rem,3.5vw,2.2rem)}
.page-head p{margin:0;color:var(--muted);max-width:720px}
.tool{display:grid;grid-template-columns:minmax(0,380px) minmax(0,1fr);gap:22px;padding-top:24px;padding-bottom:48px}
@media (max-width:860px){.tool{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.panel h2{font-size:1.1rem;margin:0 0 12px}
label{display:block;font-weight:600;font-size:.9rem;margin:10px 0 4px}
.hint{font-size:.82rem;color:var(--muted);font-weight:400}
input,select,textarea{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:7px;background:var(--bg);color:var(--ink);font:inherit}
textarea{min-height:140px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9rem}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin-bottom:16px}
.stat{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px 12px}
.stat .k{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.stat .v{font-size:1.35rem;font-weight:800}
.err{color:var(--warn);font-weight:600}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--line)}
th{font-size:.78rem;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}

/* stick diagram */
.stick{margin:10px 0 14px}
.stick .lbl{font-size:.85rem;color:var(--muted);margin-bottom:4px;display:flex;justify-content:space-between;gap:8px}
.bar{display:flex;height:34px;border-radius:5px;overflow:hidden;border:1px solid var(--line);background:repeating-linear-gradient(45deg,transparent 0 6px,rgba(179,38,30,.13) 6px 12px)}
.seg{display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;border-right:2px solid var(--surface);min-width:2px}
.seg:nth-child(6n+1){background:#3d6a9e}.seg:nth-child(6n+2){background:#2f8a73}.seg:nth-child(6n+3){background:#8a5a2f}
.seg:nth-child(6n+4){background:#6a4c93}.seg:nth-child(6n+5){background:#476b2f}.seg:nth-child(6n+6){background:#98493a}

/* upsell / prose */
.upsell{border:2px solid var(--accent);border-radius:var(--radius);padding:18px;background:var(--surface);margin-top:18px}
.prose{max-width:760px}
.prose h2{margin-top:32px}
.prose li{margin:4px 0}
.ad-slot{margin:24px 0;min-height:0}

/* footer */
.site-foot{background:var(--steel);color:#aab2bb;padding:28px 0;font-size:.9rem;margin-top:24px}
.site-foot a{color:#d7dbe0;text-decoration:none;margin-right:16px}
.site-foot .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

@media print{
  .site-head,.site-foot,.no-print,.upsell,.ad-slot,.page-head p{display:none!important}
  .tool{grid-template-columns:1fr}
  body{background:#fff;color:#000}
}
.card .btn{align-self:flex-start}