:root{
  --ink:#13212b;--muted:#5c6f7d;--paper:#f6f8f8;--card:#ffffff;--line:#dce5e7;
  --brand:#0d655f;--brand-2:#123f54;--accent:#e7a83b;--soft:#e8f3f1;--soft2:#eef4f7;
  --danger:#8a3d32;--shadow:0 18px 45px rgba(23,53,63,.09);--radius:20px;
  --wrap:min(1480px,calc(100% - 32px));
}
*{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",Arial,sans-serif;line-height:1.66}
a{color:var(--brand);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:#084c47}
img,svg{max-width:100%;height:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:9999;background:#fff;padding:10px 14px;border-radius:8px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-wrap{width:var(--wrap);margin:auto;display:flex;align-items:center;gap:24px;min-height:72px}.brand{display:flex;align-items:center;gap:11px;color:var(--ink);text-decoration:none;font-weight:800;letter-spacing:-.02em;white-space:nowrap}.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));border-radius:9px;box-shadow:0 5px 14px rgba(13,101,95,.2)}.brand-mark span{display:block;width:17px;height:17px;border:2px solid #fff;border-radius:4px;position:relative}.brand-mark span:after{content:"";position:absolute;width:6px;height:6px;border-radius:50%;background:var(--accent);right:-5px;top:-5px;border:2px solid #fff}
.nav{margin-left:auto;display:flex;align-items:center;gap:4px}.nav a{color:#263a46;text-decoration:none;padding:9px 11px;border-radius:9px;font-weight:650;font-size:.95rem}.nav a:hover,.nav a[aria-current="page"]{background:var(--soft);color:var(--brand)}.menu-btn{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px 12px;font-weight:700}
.hero{background:linear-gradient(135deg,#0d655f 0%,#123f54 72%,#173044 100%);color:#fff;overflow:hidden}.hero .inner{width:var(--wrap);margin:auto;padding:76px 0 62px;display:grid;grid-template-columns:minmax(0,1.12fr) minmax(340px,.88fr);gap:52px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.82rem;text-transform:uppercase;letter-spacing:.11em;font-weight:800;color:#c9eee9}.eyebrow:before{content:"";width:26px;height:2px;background:var(--accent)}h1{font-size:clamp(2.25rem,5vw,4.6rem);line-height:1.02;letter-spacing:-.055em;margin:.35em 0 .28em}h2{font-size:clamp(1.55rem,3vw,2.35rem);line-height:1.15;letter-spacing:-.035em;margin:1.35em 0 .55em}h3{font-size:1.18rem;line-height:1.25;margin:1.25em 0 .4em}.lead{font-size:clamp(1.08rem,1.8vw,1.28rem);color:#e6f3f4;max-width:820px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:27px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:11px 16px;font-weight:800;text-decoration:none;border:1px solid transparent}.btn-primary{background:var(--accent);color:#272017}.btn-primary:hover{color:#272017;background:#f0b84f}.btn-ghost{border-color:rgba(255,255,255,.36);color:#fff;background:rgba(255,255,255,.06)}.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.workflow{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);padding:22px;border-radius:24px;box-shadow:0 24px 60px rgba(0,0,0,.15)}.workflow-title{font-weight:800;margin:0 0 16px;color:#f4fbfb}.flow{display:grid;gap:10px}.flow-step{display:grid;grid-template-columns:34px 1fr auto;gap:10px;align-items:center;background:#fff;color:var(--ink);border-radius:12px;padding:10px 12px}.flow-n{width:30px;height:30px;display:grid;place-items:center;border-radius:8px;background:var(--soft);color:var(--brand);font-weight:900}.flow-step small{color:var(--muted)}.flow-status{font-size:.75rem;font-weight:800;color:var(--brand);background:var(--soft);padding:3px 7px;border-radius:999px}
main{min-height:60vh}.section{width:var(--wrap);margin:auto;padding:60px 0}.section.tight{padding-top:36px;padding-bottom:36px}.section-head{max-width:850px;margin-bottom:28px}.kicker{font-size:.79rem;color:var(--brand);text-transform:uppercase;letter-spacing:.11em;font-weight:900}.section-head h2{margin:.25em 0}.section-head p{color:var(--muted);font-size:1.05rem}.grid{display:grid;gap:18px}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:23px;box-shadow:0 8px 26px rgba(27,58,67,.04)}.card h3{margin-top:.15em}.card p{color:#50636f}.card .mini{display:inline-block;font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;font-weight:850;color:var(--brand);background:var(--soft);border-radius:999px;padding:4px 8px;margin-bottom:9px}.card-link{text-decoration:none;color:inherit;transition:.2s transform,.2s box-shadow}.card-link:hover{transform:translateY(-3px);box-shadow:var(--shadow);color:inherit}.arrow{font-weight:900;color:var(--brand)}
.band{background:#fff;border-block:1px solid var(--line)}.metric-strip{width:var(--wrap);margin:auto;padding:26px 0;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric{padding:15px 18px;border-left:3px solid var(--accent)}.metric b{display:block;font-size:1.07rem}.metric span{color:var(--muted);font-size:.9rem}
.page-hero{background:linear-gradient(135deg,#e8f3f1,#eef4f7);border-bottom:1px solid var(--line)}.page-hero .inner{width:var(--wrap);margin:auto;padding:48px 0}.page-hero h1{font-size:clamp(2.2rem,4.5vw,3.7rem);color:var(--ink);max-width:1000px;margin:.25em 0}.page-hero .lead{color:#405663;max-width:900px}.breadcrumbs{font-size:.88rem;color:var(--muted);margin-bottom:13px}.breadcrumbs a{color:var(--muted)}
.article-layout{width:var(--wrap);margin:auto;padding:44px 0 70px;display:grid;grid-template-columns:minmax(0,850px) minmax(250px,1fr);gap:48px;align-items:start}.article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(22px,4vw,46px);box-shadow:0 8px 28px rgba(27,58,67,.04)}.article p,.article li{color:#354b57}.article ul,.article ol{padding-left:1.25em}.article li{margin:.38em 0}.article .intro{font-size:1.14rem;color:#2e4653}.article h2{padding-top:.15em;border-top:1px solid #edf1f2;margin-top:1.6em}.article h2:first-of-type{border-top:0}.article table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.95rem}.article th,.article td{border:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}.article th{background:var(--soft2)}.note,.warning,.example{border-radius:14px;padding:16px 18px;margin:20px 0}.note{background:var(--soft);border-left:4px solid var(--brand)}.warning{background:#fff4e4;border-left:4px solid var(--accent)}.example{background:var(--soft2);border-left:4px solid var(--brand-2)}.note strong,.warning strong,.example strong{display:block;margin-bottom:4px}.toc{position:sticky;top:94px}.toc .card{padding:18px}.toc h3{margin:0 0 10px}.toc a{display:block;text-decoration:none;padding:6px 0;color:#49606d}.toc a:hover{color:var(--brand)}.author-box{display:grid;grid-template-columns:52px 1fr;gap:14px;align-items:start;margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}.avatar{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:900}
.tool-shell{background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(22px,4vw,38px);box-shadow:var(--shadow);margin:26px 0}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.field label{display:block;font-weight:800;margin-bottom:5px}.field input,.field select{width:100%;padding:11px 12px;border:1px solid #bccbd0;border-radius:10px;background:#fff;font:inherit}.field input:focus,.field select:focus{outline:3px solid rgba(13,101,95,.15);border-color:var(--brand)}.result{margin-top:22px;background:linear-gradient(135deg,var(--soft),#f4f8f8);border:1px solid #cfe2df;border-radius:16px;padding:19px}.result .big{font-size:2rem;line-height:1.1;font-weight:900;color:var(--brand);letter-spacing:-.04em}.result p{margin:.4em 0 0}.formula{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#f2f5f6;border:1px solid var(--line);padding:10px 12px;border-radius:10px;overflow:auto}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.button{border:0;border-radius:10px;padding:11px 15px;font:inherit;font-weight:850;cursor:pointer}.button-main{background:var(--brand);color:#fff}.button-alt{background:#e9eff1;color:#263a46}
.template-box{border:1px dashed #9db2b8;background:#fcfdfd;border-radius:16px;padding:20px;margin:18px 0}.template-box h3{margin-top:0}.checklist{list-style:none!important;padding:0!important}.checklist li{padding-left:28px;position:relative;margin:9px 0!important}.checklist li:before{content:"□";position:absolute;left:0;color:var(--brand);font-weight:900}
.cta{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-radius:24px;padding:32px}.cta h2{margin-top:0;color:#fff}.cta p{color:#e4f2f2}.cta a{color:#fff}
.site-footer{background:#142832;color:#d7e1e5}.footer-main{width:var(--wrap);margin:auto;padding:45px 0 30px;display:grid;grid-template-columns:1.2fr repeat(3,1fr);gap:30px}.site-footer h3{color:#fff;font-size:1rem;margin-top:0}.site-footer a{display:block;color:#c7d6db;text-decoration:none;padding:4px 0}.site-footer a:hover{color:#fff}.footer-brand p{color:#acbec5;max-width:390px}.footer-bottom{border-top:1px solid rgba(255,255,255,.1)}.footer-bottom .inner{width:var(--wrap);margin:auto;padding:18px 0;display:flex;gap:18px;justify-content:space-between;align-items:center;color:#aabcc4;font-size:.86rem}.privacy-link{cursor:pointer;background:none;border:0;color:#c7d6db;text-decoration:underline;padding:0;font:inherit}
.badges{display:flex;gap:8px;flex-wrap:wrap}.badge{font-size:.78rem;padding:4px 8px;border-radius:999px;border:1px solid var(--line);background:#fff;color:#50636f}.muted{color:var(--muted)}.center{text-align:center}.spacer{height:10px}
@media(max-width:980px){.hero .inner{grid-template-columns:1fr}.workflow{max-width:700px}.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.toc{position:static;order:-1}.footer-main{grid-template-columns:repeat(2,1fr)}.metric-strip{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){:root{--wrap:min(100% - 24px,1480px)}.menu-btn{display:block}.nav{display:none;position:absolute;top:64px;left:12px;right:12px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:9px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav.open{display:flex}.nav a{padding:11px 12px}.hero .inner{padding:54px 0 46px}.grid-3,.grid-4,.tool-grid{grid-template-columns:1fr}.footer-main{grid-template-columns:1fr}.footer-bottom .inner{align-items:flex-start;flex-direction:column}.metric-strip{grid-template-columns:1fr}.flow-step{grid-template-columns:34px 1fr}.flow-status{display:none}.article{padding:22px}.article table{display:block;overflow-x:auto}}
@media print{.site-header,.site-footer,.toc,.hero-actions,.actions,.cta{display:none!important}body{background:#fff}.article-layout{display:block;padding:0}.article{box-shadow:none;border:0;padding:0}.page-hero .inner{padding:18px 0}.template-box{break-inside:avoid}}