:root{--ink:#28323a;--muted:#68737b;--paper:#f1f4f4;--panel:#fff;--line:#d7e1e0;--deep:#20383c;--a:#5f83a0;--b:#48a59a;--c:#c8d85a;--d:#d58a45;--shadow:0 14px 38px rgba(38,53,62,.10);--wrap:min(1480px,calc(100% - 36px))}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(90deg,rgba(70,90,100,.025) 1px,transparent 1px),linear-gradient(rgba(70,90,100,.025) 1px,transparent 1px),var(--paper);background-size:34px 34px;color:var(--ink);font-family:Inter,system-ui,-apple-system,'Segoe UI',sans-serif;line-height:1.68}a{color:#327b73;text-underline-offset:3px}.wrap{width:var(--wrap);margin:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:10px;top:10px;background:#fff;padding:10px;z-index:100}.site-header{background:var(--deep);color:#fff;position:sticky;top:0;z-index:40}.nav-row{min-height:74px;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;font-weight:900;min-width:350px}.mark{width:48px;height:48px;border-radius:12px;background:linear-gradient(145deg,var(--b),var(--c));display:grid;place-items:center;color:#253039;font-size:.68rem;font-weight:950}.brand-copy{display:flex;flex-direction:column;line-height:1.05}.brand-copy small{font-size:.62rem;color:#cbd5db;text-transform:uppercase;letter-spacing:.08em}.nav-links{margin-left:auto;display:flex;gap:3px;flex-wrap:wrap}.nav-links a{color:#fff;text-decoration:none;padding:8px 10px;border-radius:8px;font-weight:760;font-size:.9rem}.nav-links a:hover,.nav-links a[aria-current=page]{background:rgba(255,255,255,.11)}.nav-toggle{display:none;margin-left:auto;background:transparent;color:#fff;border:1px solid #819099;border-radius:8px;padding:8px 10px}.hero{background:radial-gradient(circle at 84% 14%,rgba(110,170,160,.22),transparent 25rem),radial-gradient(circle at 95% 82%,rgba(220,170,80,.19),transparent 22rem),linear-gradient(125deg,var(--deep),#31575b 58%,#495f50);color:#fff;padding:76px 0 62px}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}.eyebrow,.kicker{font-size:.76rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}.eyebrow{color:#e5f28b}.kicker{color:#327b73}h1,h2,h3{line-height:1.14;letter-spacing:-.03em}h1{font-size:clamp(2.25rem,5vw,4.5rem);margin:.25em 0}.hero p{font-size:1.16rem;color:#eef3f5}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-flex;padding:12px 16px;border-radius:10px;font-weight:850;text-decoration:none;border:1px solid transparent}.btn-primary{background:var(--c);color:#27323a}.btn-secondary{border-color:#bbc7cc;color:#fff}.visual{background:rgba(27,39,47,.45);border:1px solid rgba(255,255,255,.18);border-radius:20px;padding:22px}.vrow{display:grid;grid-template-columns:110px 1fr;gap:14px;align-items:center;background:#fbfeff;color:#29343c;border-radius:11px;padding:13px;margin:9px 0;border-left:5px solid var(--b)}.vrow:nth-child(2){border-color:var(--c)}.vrow:nth-child(3){border-color:var(--a)}.vrow:nth-child(4){border-color:var(--d)}.vrow b{font-size:.84rem}.vrow span{font-size:.77rem;color:#6b757c}.section{padding:60px 0}.section-tight{padding:42px 0}.lead{font-size:1.13rem;color:#5d676e;max-width:930px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.card,.article,.toc{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow)}.card{border-radius:18px;padding:24px}.card-link{display:block;color:inherit;text-decoration:none}.page-head{padding:52px 0 28px}.page-head h1{font-size:clamp(2.15rem,4vw,3.6rem)}.page-head p{font-size:1.1rem;color:#616b72;max-width:920px}.breadcrumbs,.meta,.small,.notice{font-size:.86rem;color:#707a81}.pill{display:inline-flex;background:#e6f2f0;color:#327b73;padding:5px 9px;border-radius:999px;margin:2px;font-size:.76rem;font-weight:850}.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}.article{border-radius:20px;padding:clamp(24px,4vw,50px)}.article h2{margin-top:1.6em;font-size:clamp(1.5rem,2.6vw,2.1rem)}.article p,.article li{max-width:84ch}.toc{position:sticky;top:94px;border-radius:14px;padding:20px}.toc a{display:block;color:#627078;text-decoration:none;padding:6px 0}.tool{background:linear-gradient(145deg,var(--deep),#31575b);color:#fff;padding:26px;border-radius:18px}.tool input{width:100%;padding:11px;border-radius:8px;border:1px solid #abb9c0;font:inherit}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.result{background:#fbfeff;color:#29353c;border-radius:10px;padding:17px;margin-top:18px}.result strong{font-size:1.35rem}.faq details{border:1px solid var(--line);border-radius:10px;padding:14px;margin:10px 0}.faq summary{font-weight:850;cursor:pointer}.site-footer{margin-top:60px;background:var(--deep);color:#dee7ea;padding:42px 0 26px}.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:26px}.site-footer h3{color:#fff}.site-footer a{color:#e0eaed}.footer-brand{color:#fff;font-weight:900}.footer-note{margin-top:22px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);font-size:.84rem;color:#afbdc3}.not-found{text-align:center;padding:90px 20px}.code{font-size:5rem;font-weight:950;color:var(--b)}@media(max-width:980px){.hero-grid,.article-shell{grid-template-columns:1fr}.toc{position:static}.grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){:root{--wrap:min(100% - 24px,1480px)}.site-header{position:relative}.brand{min-width:0;max-width:76%}.brand-copy small{display:none}.nav-toggle{display:block}.nav-links{display:none;position:absolute;top:66px;left:0;right:0;background:#31575b;padding:12px 18px;flex-direction:column}.nav-links.open{display:flex}.grid,.grid-2,.form-grid,.footer-grid{grid-template-columns:1fr}.vrow{grid-template-columns:1fr}.article{padding:22px 18px}}