:root{
  --ink:#1c2430; --muted:#5a6a7a; --accent:#0e4d3c; --accent2:#c9a227;
  --bg:#f7f8f6; --card:#ffffff; --line:#e2e6e1; --good:#0e4d3c; --warn:#8a5a00;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55}
header.site{background:var(--accent);color:#fff;padding:14px 20px}
header.site .wrap{max-width:960px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.brand{font-weight:700;font-size:1.15rem;color:#fff;text-decoration:none}
.brand span{color:var(--accent2)}
nav a{color:#dfeee8;text-decoration:none;margin-left:16px;font-size:.95rem}
nav a:hover{text-decoration:underline}
main{max-width:960px;margin:0 auto;padding:24px 20px 40px}
h1{font-size:1.9rem;line-height:1.25;margin:.2em 0 .4em}
h2{font-size:1.35rem;margin-top:1.6em}
h3{font-size:1.1rem}
p.lede{font-size:1.08rem;color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin:18px 0;box-shadow:0 1px 3px rgba(20,40,30,.05)}
label{display:block;font-weight:600;margin:14px 0 4px}
select,input[type=number]{width:100%;padding:10px;border:1px solid #c4ccc5;border-radius:8px;font-size:1rem;background:#fff}
.hint{font-size:.88rem;color:var(--muted);margin-top:3px}
button.calc{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:12px 22px;font-size:1.05rem;font-weight:600;cursor:pointer;margin-top:18px}
button.calc:hover{background:#0a3a2e}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:700px){.grid{grid-template-columns:1fr}}
table{border-collapse:collapse;width:100%;margin:12px 0;font-size:.95rem}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left}
th{background:#eef3ef}
td.num,th.num{text-align:right}
.result{display:none}
.result.show{display:block}
.big{font-size:1.5rem;font-weight:700}
.verdict{border-left:5px solid var(--accent2);background:#fdf8e8;padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0}
.note{border-left:5px solid var(--warn);background:#fff7ea;padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0;font-size:.95rem}
.small{font-size:.88rem;color:var(--muted)}
footer.site{border-top:1px solid var(--line);padding:22px 20px;color:var(--muted);font-size:.9rem}
footer.site .wrap{max-width:960px;margin:0 auto}
.cta{background:#eef3ef;border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:26px 0}
.cta a{color:var(--accent);font-weight:600}
.faq h3{margin-bottom:2px}