:root{--ink:#15363b;--deep:#082b32;--paper:#f3f1e9;--white:#fff;--orange:#d95d34;--lime:#b8df70;--line:#d7dfda}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.6}.bf-head{min-height:72px;padding:0 max(20px,calc((100vw - 1180px)/2));display:flex;align-items:center;justify-content:space-between;background:var(--deep);color:#fff}.bf-brand{display:flex;align-items:center;gap:11px;color:#fff;text-decoration:none;font-size:20px;font-weight:700}.bf-brand span{display:grid;place-items:center;width:38px;height:38px;background:var(--lime);color:var(--deep);border-radius:50%;font-size:13px}.bf-head nav{display:flex;gap:22px}.bf-head nav a{color:#eaf1ec;text-decoration:none;font-size:14px}.hero,.content-grid,.index-grid,footer{max-width:1180px;margin:auto}.hero{padding:70px 24px 45px}.eyebrow{font-size:11px;letter-spacing:1.7px;font-weight:700;color:var(--orange)}.crumb{font-size:13px;color:#668085}.crumb a,.sources a,footer a{color:#a74023}.hero h1{max-width:900px;margin:12px 0;font-size:clamp(38px,6vw,74px);line-height:1.03;letter-spacing:-2.5px}.lede{max-width:780px;font-size:20px;color:#38565b}.model-card{display:flex;gap:18px;flex-wrap:wrap;margin-top:30px;padding:16px 18px;border-left:4px solid var(--lime);background:#e7ece6}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:56px;padding:20px 24px 80px}.content-grid h2{margin-top:42px;font-size:26px;line-height:1.2}.causes{padding-left:20px}.step{display:grid;grid-template-columns:48px 1fr;gap:18px;padding:24px 0;border-top:1px solid var(--line)}.step>span{font-weight:700;color:var(--orange)}.step h3{margin:0 0 5px}.step p{margin:5px 0}.result{color:#4d686d}.stop{margin-top:36px;padding:26px;background:var(--deep);color:#fff}.stop h2{margin-top:0}.lead-box{position:sticky;top:24px;align-self:start;padding:28px;background:#fff;border:1px solid var(--line)}.lead-box h2{margin-top:10px}.button{display:block;margin:24px 0 14px;padding:15px 18px;background:var(--orange);color:#fff;text-decoration:none;text-align:center;font-weight:700}.lead-box small,.review{font-size:12px;color:#667b7f}.index-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;padding:10px 24px 80px}.diag-card{min-height:220px;padding:24px;background:#fff;border:1px solid var(--line);color:var(--ink);text-decoration:none;display:flex;flex-direction:column;gap:12px}.diag-card span{font-size:11px;letter-spacing:1px;color:var(--orange);font-weight:700}.diag-card strong{font-size:22px;line-height:1.2}.diag-card small{color:#587075}footer{padding:32px 24px 55px;border-top:1px solid var(--line);font-size:13px;color:#61777b}@media(max-width:820px){.bf-head{padding:0 18px}.bf-head nav a:first-child{display:none}.hero{padding-top:48px}.content-grid{grid-template-columns:1fr;gap:20px}.lead-box{position:static}.index-grid{grid-template-columns:1fr}.hero h1{letter-spacing:-1.5px}}