:root{--bg:#f8fafc;--surface:#fff;--text:#0f172a;--muted:#475569;--border:#e2e8f0;--accent:#0f766e;--accent2:#115e59;--soft:#ecfdf5;--warn:#fffbeb;--radius:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--accent2)}a:hover{text-decoration:underline}
.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.5rem;z-index:10}
header.site{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:5}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.9rem 0;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.25rem;color:var(--text);text-decoration:none}.logo span{color:var(--accent)}
nav.links{display:flex;gap:1rem;flex-wrap:wrap}nav.links a{color:var(--muted);text-decoration:none;font-size:.95rem}nav.links a:hover{color:var(--accent2)}
.hero{padding:3rem 0 2rem;text-align:center}.hero h1{font-size:2.4rem;line-height:1.15;margin:.2rem 0}.hero p{color:var(--muted);max-width:680px;margin:0 auto}
h1{font-size:2rem;line-height:1.2}h2{margin-top:2.2rem} .lead{color:var(--muted);font-size:1.05rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;margin:1.5rem 0 3rem}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem}
.card h3{margin:.2rem 0}.card p{color:var(--muted);margin:.3rem 0}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:.65rem 1.1rem;border-radius:10px;text-decoration:none;border:0;cursor:pointer;font-size:1rem;font-weight:600}.btn:hover{background:var(--accent2);text-decoration:none}
.calc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin:1.5rem 0}
.calc label{display:block;font-weight:600;margin:.8rem 0 .25rem;font-size:.95rem}
.calc input,.calc select{width:100%;padding:.65rem;border:1px solid #cbd5e1;border-radius:10px;font-size:1rem;background:#fff}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}@media(max-width:640px){.calc .row{grid-template-columns:1fr}.hero h1{font-size:1.9rem}}
.result{margin-top:1.25rem;background:var(--soft);border:1px solid #a7f3d0;border-radius:10px;padding:1rem;display:none}.result.show{display:block}.result .big{font-size:1.6rem;font-weight:800}
table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:.5rem;border-bottom:1px solid var(--border)}
.note{background:var(--warn);border:1px solid #fde68a;border-radius:10px;padding:1rem;margin:1rem 0;font-size:.95rem}
.faq details{background:#fff;border:1px solid var(--border);border-radius:10px;padding:.9rem 1rem;margin:.6rem 0}
footer.site{background:#0f172a;color:#cbd5e1;margin-top:3rem;padding:2rem 0}footer.site a{color:#e2e8f0}footer .cols{display:flex;gap:2rem;flex-wrap:wrap;justify-content:space-between}
:focus-visible{outline:3px solid #99f6e4;outline-offset:2px}