:root{--bg:#f6f7fb;--paper:#fff;--ink:#161821;--muted:#656b7b;--line:#e5e7ef;--accent:#5b52ff;--accent2:#eceaff;--good:#16794d;--warn:#a05a00;--shadow:0 14px 40px rgba(26,31,60,.08);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);line-height:1.55}a{color:inherit;text-decoration:none}.wrap{max-width:1120px;margin:auto;padding:0 22px}.topbar{background:#151622;color:#fff;font-size:13px;text-align:center;padding:8px 12px}.nav{display:flex;justify-content:space-between;align-items:center;padding:20px 0}.brand{font-weight:850;letter-spacing:-.03em;font-size:22px}.brand span{color:var(--accent)}.navlinks{display:flex;gap:22px;font-size:14px;color:var(--muted)}.hero{padding:72px 0 40px}.eyebrow{display:inline-flex;background:var(--accent2);color:#4138d8;border:1px solid #d8d4ff;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:750;letter-spacing:.03em;text-transform:uppercase}.hero h1{font-size:clamp(42px,6vw,74px);line-height:.98;letter-spacing:-.055em;max-width:870px;margin:20px 0}.hero p{font-size:19px;color:var(--muted);max-width:720px}.cta{display:inline-flex;background:var(--ink);color:#fff;padding:12px 17px;border-radius:11px;font-weight:700;margin-top:12px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.tool-card,.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 0 rgba(0,0,0,.01)}.tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);transition:.18s}.tool-card small{color:var(--accent);font-weight:700}.tool-card h3{margin:9px 0 7px;font-size:20px;letter-spacing:-.025em}.tool-card p{color:var(--muted);font-size:14px;margin:0}.section{padding:48px 0}.section h2{font-size:32px;letter-spacing:-.035em;margin:0 0 12px}.section-lead{color:var(--muted);max-width:700px}.calc-shell{display:grid;grid-template-columns:1fr .9fr;gap:18px;align-items:start;margin-top:28px}.panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow)}.panel h2,.panel h3{margin-top:0}.field{margin:0 0 16px}.field label{font-size:13px;font-weight:700;display:block;margin-bottom:7px}.hint{font-size:12px;color:var(--muted);font-weight:450}.field input,.field select,.field textarea{width:100%;border:1px solid #d9dce7;border-radius:10px;padding:12px 13px;background:#fff;font:inherit;color:var(--ink);outline:none}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(91,82,255,.1)}.field textarea{min-height:170px;resize:vertical}.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.result-hero{background:#161821;color:#fff;border-radius:16px;padding:20px;margin-bottom:12px}.result-hero span{display:block;color:#bbbfd0;font-size:12px;text-transform:uppercase;letter-spacing:.04em}.result-hero strong{display:block;font-size:38px;letter-spacing:-.04em;margin-top:5px}.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.metric{border:1px solid var(--line);border-radius:12px;padding:13px}.metric span{font-size:12px;color:var(--muted);display:block}.metric strong{font-size:18px}.table{width:100%;border-collapse:collapse;font-size:14px}.table th,.table td{text-align:left;padding:11px 8px;border-bottom:1px solid var(--line)}.table th{font-size:12px;color:var(--muted)}.ad-slot{border:1px dashed #c9ccda;background:#fafbfe;color:#9a9fb0;border-radius:12px;display:flex;align-items:center;justify-content:center;min-height:100px;font-size:12px;margin:28px 0}.content{max-width:790px}.content h2{margin-top:38px}.content h3{margin-top:26px}.content p,.content li{color:#424756}.formula{background:#171922;color:#fff;padding:16px;border-radius:12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;overflow:auto}.source-note{font-size:12px;color:var(--muted);border-left:3px solid var(--line);padding-left:12px}.footer{border-top:1px solid var(--line);margin-top:60px;padding:36px 0 60px;color:var(--muted);font-size:13px}.footergrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}.pill{display:inline-flex;padding:5px 9px;border-radius:999px;background:#eef8f3;color:var(--good);font-size:11px;font-weight:750}.notice{background:#fff7e9;border:1px solid #f0d7ad;padding:13px 15px;border-radius:11px;color:#76521e;font-size:13px}.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:8px 0}.faq summary{cursor:pointer;font-weight:700}.faq p{font-size:14px;color:var(--muted)}.tool-head{padding:46px 0 5px}.tool-head h1{font-size:clamp(38px,5vw,60px);letter-spacing:-.05em;line-height:1.02;margin:14px 0}.tool-head p{font-size:18px;color:var(--muted);max-width:760px}.tiny{font-size:12px;color:var(--muted)}
@media(max-width:850px){.grid{grid-template-columns:1fr 1fr}.calc-shell{grid-template-columns:1fr}.navlinks{display:none}.hero{padding-top:45px}.footergrid{grid-template-columns:1fr}.row2{grid-template-columns:1fr}}
@media(max-width:560px){.grid{grid-template-columns:1fr}.wrap{padding:0 16px}.hero h1{font-size:44px}.metric-grid{grid-template-columns:1fr}.panel{padding:18px}}