:root{--ink:#17352c;--muted:#62736d;--paper:#f5f3eb;--card:#fff;--line:#d9ddd7;--green:#1f6048;--lime:#d9ed83;--orange:#d97943}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}a{color:inherit}header.site{height:72px;border-bottom:1px solid var(--line);background:rgba(245,243,235,.94);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1180px)/2));position:sticky;top:0;z-index:5;backdrop-filter:blur(12px)}.brand{font-weight:850;font-size:1.3rem;text-decoration:none}.brand i{display:inline-grid;place-items:center;width:28px;height:28px;margin-right:8px;border-radius:50%;background:var(--ink);color:#fff;font-style:normal}nav{display:flex;gap:22px}nav a{text-decoration:none;font-size:.92rem;font-weight:650}.hero,.wrap{max-width:1180px;margin:auto;padding:72px 24px}.hero{display:grid;grid-template-columns:1.35fr .65fr;gap:60px;align-items:end}.eyebrow{font-size:.76rem;font-weight:800;letter-spacing:.14em;color:var(--green);text-transform:uppercase}.hero h1{font-size:clamp(2.7rem,6vw,5.8rem);line-height:.98;letter-spacing:-.055em;margin:14px 0 24px}.hero>div>p:not(.eyebrow){font-size:1.18rem;color:var(--muted);max-width:720px}.hero-card{background:var(--ink);color:#fff;padding:30px;border-radius:22px}.hero-card strong{font-size:2.4rem;display:block}.hero-card span{color:#bfd1c9}.cta{display:inline-flex;margin-top:22px;padding:13px 19px;border-radius:99px;background:var(--lime);color:var(--ink);text-decoration:none;font-weight:800}.cta.dark{background:var(--ink);color:#fff}.facts,.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.facts div,.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px}.facts small{display:block;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:700}.facts strong{font-size:1.45rem}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section-head h2{font-size:clamp(2rem,4vw,3.4rem);line-height:1.05;letter-spacing:-.04em;margin:8px 0}.section-head p{max-width:520px;color:var(--muted)}.card h3{font-size:1.35rem;margin:0 0 8px}.card p{color:var(--muted)}.card a{font-weight:750}.answer{background:#e5eadf;padding:60px 0}.answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px}.answer h2{font-size:2.5rem;line-height:1.1}.answer li{margin:10px 0}.method{border-left:4px solid var(--orange);padding:5px 0 5px 24px;color:var(--muted)}.calculator{display:grid;grid-template-columns:1fr .8fr;gap:24px}.calculator form,.results{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}label{font-weight:700;font-size:.9rem}input{width:100%;display:block;margin-top:7px;padding:13px;border:1px solid #bcc7c1;border-radius:9px;font:inherit}.results{background:var(--ink);color:white;display:grid;grid-template-columns:1fr 1fr;gap:16px;align-content:start}.results span{padding:14px;border-bottom:1px solid #3c5c52}.results small{display:block;color:#bfd1c9}.results strong{font-size:1.7rem}article.guide{max-width:820px}.guide h1{font-size:clamp(2.5rem,6vw,5rem);line-height:1;letter-spacing:-.05em}.guide h2{font-size:2rem;margin-top:50px}.guide p,.guide li{font-size:1.08rem;color:#40564f}.guide .summary{font-size:1.25rem;color:var(--ink);border-left:4px solid var(--orange);padding-left:22px}footer{background:var(--ink);color:#dce8e2;padding:48px 24px;margin-top:70px}footer>div{max-width:1180px;margin:auto;display:flex;justify-content:space-between;gap:30px}footer a{color:white}.source-list{font-size:.9rem;color:var(--muted)}@media(max-width:760px){header.site nav{display:none}.hero,.calculator,.answer-grid{grid-template-columns:1fr}.hero{padding-top:46px}.hero h1{font-size:3.15rem}.facts,.cards{grid-template-columns:1fr}.fields{grid-template-columns:1fr}.results{grid-template-columns:1fr}.section-head,footer>div{display:block}}
.breadcrumbs{max-width:1180px;margin:0 auto;padding:24px 24px 0;display:flex;flex-wrap:wrap;gap:9px;color:var(--muted);font-size:.86rem}.breadcrumbs a{text-decoration:none;font-weight:700}.breadcrumbs i{font-style:normal;color:#91a099}.card h2,.card h3{font-size:1.35rem;line-height:1.25;margin:0 0 8px}.card p{color:var(--muted)}.card a{font-weight:750}