:root{
 --bg:#f5f3ed;--paper:#fff;--ink:#1e2a20;--muted:#657067;--line:#dedfd7;
 --green:#285f3b;--green2:#e1eddf;--brown:#76543a;--sand:#efe7d7;
 --warn:#fff5d9;--shadow:0 15px 45px rgba(37,50,39,.09);--radius:18px;--max:1120px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}
a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}
.wrap{width:min(var(--max),calc(100% - 32px));margin:auto}
.site-header{position:sticky;top:0;z-index:30;background:rgba(245,243,237,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{height:70px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:900;letter-spacing:-.025em}
.mark{width:36px;height:36px;display:grid;place-items:center;border-radius:11px;background:var(--green);color:#fff;font-size:18px}
.navlinks{display:flex;gap:18px;align-items:center;font-size:14px}.navlinks a{color:var(--ink)}
.menu{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 12px}
.breadcrumb{font-size:13px;color:var(--muted);padding-top:20px}.breadcrumb a{color:var(--muted)}
.hero{padding:62px 0 42px}.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:44px;align-items:center}
.eyebrow{display:inline-flex;background:var(--green2);color:var(--green);padding:7px 11px;border-radius:999px;font-size:13px;font-weight:800;margin-bottom:16px}
h1,h2,h3{line-height:1.14;letter-spacing:-.035em;margin:0 0 15px}h1{font-size:clamp(40px,5.5vw,68px)}h2{font-size:clamp(28px,3.2vw,40px)}h3{font-size:21px}
.lead{font-size:19px;color:var(--muted);max-width:720px}.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}.chip{background:#fff;border:1px solid var(--line);padding:7px 10px;border-radius:999px;font-size:13px}
.calculator{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.calc-head{display:flex;justify-content:space-between;gap:12px;align-items:start;margin-bottom:18px}.calc-head h2,.calc-head h3{margin:0}.badge{font-size:11px;font-weight:850;background:var(--sand);color:var(--brown);padding:6px 9px;border-radius:999px;white-space:nowrap}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:13px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}
label{font-size:13px;font-weight:760}.hint{font-size:11px;color:var(--muted)}
input,select{width:100%;border:1px solid #ccd2c9;background:#fff;border-radius:11px;padding:12px 13px;color:var(--ink)}
input:focus,select:focus{outline:3px solid rgba(40,95,59,.13);border-color:var(--green)}
.primary{border:0;background:var(--green);color:#fff;border-radius:12px;padding:13px 16px;font-weight:850;width:100%;margin-top:16px;cursor:pointer}.primary:hover{filter:brightness(.96)}
.result{display:none;margin-top:16px;background:var(--green2);padding:16px;border-radius:13px}.result.show{display:block}.result .value{font-size:30px;line-height:1.15;font-weight:900;letter-spacing:-.04em;color:#173c25}.result small{display:block;color:#536158;margin-top:7px}
.note{margin-top:14px;padding:13px 14px;background:var(--warn);border:1px solid #e9d79f;border-radius:12px;font-size:13px;color:#544b32}
.section{padding:54px 0}.section.white{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:26px}.section-head p{color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.card p{color:var(--muted);margin:0}.card a.more{display:inline-block;margin-top:13px;font-weight:800}
.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:34px;align-items:start}
.prose{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px}.prose p,.prose li{color:#38443a}.prose h2{font-size:30px;margin-top:36px}.prose h3{margin-top:26px}.prose ul,.prose ol{padding-left:22px}
.toc{position:sticky;top:92px;background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px}.toc strong{display:block;margin-bottom:8px}.toc a{display:block;font-size:13px;color:#4a574d;padding:5px 0}
.callout{background:#f5f8f3;border-left:4px solid var(--green);padding:15px 16px;border-radius:0 12px 12px 0;margin:20px 0}
.formula{font-size:20px;font-weight:900;text-align:center;background:#f7f5ef;border:1px solid var(--line);padding:17px;border-radius:13px;margin:20px 0;overflow:auto}
.table-wrap{overflow:auto}.table{border-collapse:collapse;width:100%;font-size:14px}.table th,.table td{padding:11px 9px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}.table th{background:#f7f6f1}
.faq{padding:16px 0;border-top:1px solid var(--line)}.faq summary{cursor:pointer;font-weight:830}.faq p{margin-bottom:0}
.sources{background:#f7f6f1;border:1px solid var(--line);border-radius:13px;padding:15px;font-size:13px;margin-top:24px}.sources ul{margin:7px 0 0}
.ad{min-height:110px;border:1px dashed #c3c8c0;border-radius:13px;color:#929991;background:#fafaf7;display:grid;place-items:center;font-size:11px;margin:28px 0}
.site-footer{margin-top:58px;background:#173a24;color:#e9f0ea;padding:42px 0 28px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:28px}.site-footer a{color:#e9f0ea}.footer-grid p{color:#b9c7bc}.fine{margin-top:26px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:#a7b9aa}
.kpi{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0}.kpi div{border:1px solid var(--line);background:#f7f8f4;border-radius:13px;padding:14px}.kpi b{display:block;font-size:22px}.kpi span{font-size:12px;color:var(--muted)}
.mini-converter{background:#f8faf6;border:1px solid var(--line);border-radius:15px;padding:17px;margin:22px 0}
@media(max-width:860px){.hero-grid,.content-grid{grid-template-columns:1fr}.toc{display:none}.cards{grid-template-columns:1fr 1fr}.navlinks{display:none}.menu{display:block}.nav.open .navlinks{display:flex;position:absolute;top:62px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.grid2,.cards,.footer-grid,.kpi{grid-template-columns:1fr}.field.full{grid-column:auto}.hero{padding-top:38px}.calculator,.prose{padding:20px}h1{font-size:40px}}