:root{
  --ink:#10212b;
  --muted:#52636d;
  --line:#d8e2e7;
  --paper:#ffffff;
  --soft:#f3f7f8;
  --soft-2:#e8f0f2;
  --navy:#12364a;
  --navy-2:#0b2838;
  --teal:#147d82;
  --teal-dark:#0c6267;
  --cyan:#5dbcc3;
  --gold:#c9912f;
  --danger:#a8473b;
  --ok:#287a58;
  --shadow:0 12px 34px rgba(16,33,43,.08);
  --radius:18px;
  --wrap:1500px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.66;
}
img,svg{max-width:100%;height:auto}
a{color:var(--teal-dark);text-decoration-thickness:.08em;text-underline-offset:.16em}
a:hover{color:var(--navy)}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.wrap{width:min(calc(100% - 32px),var(--wrap));margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:8px;z-index:9999;background:#fff;padding:.7rem 1rem;border:2px solid var(--navy)}
.skip-link:focus{left:8px}
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand-link{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;min-width:0}
.brand-mark{width:44px;height:44px;flex:0 0 auto}
.brand-copy{min-width:0}
.brand-name{font-size:1.02rem;font-weight:800;letter-spacing:-.01em;line-height:1.15}
.brand-tagline{font-size:.76rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:460px}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:.55rem .7rem;color:var(--ink)}
.primary-nav{display:flex;align-items:center;gap:4px}
.primary-nav a{color:var(--ink);text-decoration:none;font-weight:700;font-size:.92rem;padding:.58rem .72rem;border-radius:10px}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--soft-2);color:var(--navy)}
.hero{
  background:
    radial-gradient(circle at 85% 10%,rgba(93,188,195,.25),transparent 28%),
    linear-gradient(135deg,var(--navy-2),var(--navy) 58%,#15566c);
  color:#fff;
  padding:clamp(54px,7vw,92px) 0;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:44px;align-items:center}
.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase;color:var(--cyan);margin:0 0 .8rem}
.hero h1{font-size:clamp(2.35rem,5vw,4.6rem);line-height:1.03;letter-spacing:-.045em;margin:.1rem 0 1rem;max-width:900px}
.hero p{font-size:clamp(1.05rem,1.5vw,1.25rem);color:#dcebf0;max-width:820px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.5rem}
.button{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:46px;padding:.72rem 1rem;border-radius:12px;border:1px solid transparent;
  text-decoration:none;font-weight:800;
}
.button-primary{background:#fff;color:var(--navy)}
.button-primary:hover{background:#e9f4f5}
.button-secondary{border-color:rgba(255,255,255,.38);color:#fff;background:rgba(255,255,255,.07)}
.button-secondary:hover{background:rgba(255,255,255,.14);color:#fff}
.hero-panel{
  border:1px solid rgba(255,255,255,.23);border-radius:22px;padding:24px;
  background:rgba(255,255,255,.08);box-shadow:0 24px 50px rgba(0,0,0,.18)
}
.layer-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.layer-list li{display:flex;gap:12px;align-items:flex-start;background:rgba(255,255,255,.08);border-radius:13px;padding:12px}
.layer-num{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--cyan);color:var(--navy-2);font-weight:900;flex:0 0 auto}
main{min-height:60vh}
.section{padding:clamp(44px,6vw,80px) 0}
.section-soft{background:var(--soft)}
.section h2{font-size:clamp(1.75rem,3vw,2.55rem);line-height:1.15;letter-spacing:-.025em;margin:0 0 .75rem}
.section-intro{max-width:850px;color:var(--muted);font-size:1.06rem}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(20px,3vw,30px);
  box-shadow:var(--shadow);
}
.card h2,.card h3{margin-top:0}
.card h3{font-size:1.18rem;line-height:1.3}
.card p:last-child,.card ul:last-child{margin-bottom:0}
.card-link{display:block;text-decoration:none;color:inherit;transition:transform .15s ease,box-shadow .15s ease}
.card-link:hover{transform:translateY(-2px);box-shadow:0 16px 42px rgba(16,33,43,.13);color:inherit}
.icon-box{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--soft-2);color:var(--teal-dark);font-weight:900;margin-bottom:14px}
.kicker{font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:var(--teal-dark);font-weight:900}
.pill{display:inline-flex;align-items:center;background:var(--soft-2);color:var(--navy);border-radius:999px;padding:.28rem .62rem;font-size:.76rem;font-weight:800}
.page-hero{background:linear-gradient(135deg,var(--navy-2),var(--navy));color:#fff;padding:48px 0}
.page-hero h1{font-size:clamp(2rem,4vw,3.45rem);line-height:1.08;letter-spacing:-.035em;margin:.25rem 0 .8rem}
.page-hero p{max-width:900px;color:#dcebf0;font-size:1.08rem}
.breadcrumbs{font-size:.86rem;color:#c4d8df}
.breadcrumbs a{color:#fff}
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:34px;align-items:start}
.article-body{min-width:0}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:.9rem;margin:0 0 1.4rem}
.article-body h2{font-size:clamp(1.45rem,2.4vw,2rem);line-height:1.18;margin:2.3rem 0 .7rem;scroll-margin-top:100px}
.article-body h3{font-size:1.2rem;margin:1.7rem 0 .5rem}
.article-body p,.article-body li{font-size:1.02rem}
.article-body .card{margin:1.25rem 0}
.article-body figure{margin:1.7rem 0;padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
.article-body figcaption{color:var(--muted);font-size:.9rem;margin-top:12px}
.article-body svg{display:block;width:100%;height:auto}
.article-body .small{font-size:.92rem;color:var(--muted)}
.article-body .hr{height:1px;background:var(--line);margin:1rem 0}
.list{padding-left:1.25rem}
.list li+li{margin-top:.45rem}
.toc{position:sticky;top:96px}
.toc h2{font-size:1.05rem;margin:0 0 .7rem}
.toc ol,.toc ul{padding-left:1.15rem;margin:.4rem 0 0}
.toc li+li{margin-top:.4rem}
.toc a{text-decoration:none;font-size:.9rem}
.note,.warning,.success{border-left:5px solid var(--teal);background:var(--soft);padding:16px 18px;border-radius:0 12px 12px 0;margin:1.4rem 0}
.warning{border-color:var(--gold);background:#fff9ed}
.success{border-color:var(--ok);background:#eff9f4}
.definition{display:grid;grid-template-columns:180px minmax(0,1fr);gap:18px;padding:14px 0;border-bottom:1px solid var(--line)}
.definition dt{font-weight:900}
.definition dd{margin:0;color:var(--muted)}
.table-wrap{overflow-x:auto;margin:1.4rem 0;border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%;min-width:650px}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--soft);font-size:.86rem}
.tool-shell{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:26px;align-items:start}
.tool-panel{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:#fff;box-shadow:var(--shadow)}
.field{display:grid;gap:6px;margin-bottom:16px}
.field label{font-weight:800;font-size:.92rem}
.field input,.field select,.field textarea{
  width:100%;border:1px solid #b8c7cf;border-radius:10px;padding:.72rem .8rem;background:#fff;color:var(--ink)
}
.field textarea{min-height:110px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:3px solid rgba(93,188,195,.28);border-color:var(--teal)}
.result{background:var(--navy);color:#fff;border-radius:16px;padding:20px}
.result strong,.result-output{font-size:1.45rem}
.result small{color:#d5e6eb}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.button-dark{background:var(--navy);color:#fff;border:0}
.button-dark:hover{background:var(--navy-2);color:#fff}
.button-light{background:var(--soft);color:var(--navy);border:1px solid var(--line)}
.checklist{display:grid;gap:10px}
.check-row{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start;padding:12px;border:1px solid var(--line);border-radius:12px}
.check-row input{margin-top:.3rem}
.progress-track{height:12px;background:var(--soft-2);border-radius:999px;overflow:hidden}
.progress-bar{height:100%;width:0;background:var(--teal);transition:width .2s ease}
.mapper-row{display:grid;grid-template-columns:1.1fr 1.1fr .8fr .8fr auto;gap:8px;margin-bottom:8px}
.mapper-row input,.mapper-row select{min-width:0;border:1px solid #b8c7cf;border-radius:9px;padding:.58rem}
.site-footer{background:var(--navy-2);color:#dcebf0;padding:42px 0 26px;margin-top:70px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:32px}
.site-footer h2{font-size:1rem;color:#fff;margin-top:0}
.site-footer a{color:#dcebf0}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:28px;padding-top:18px;color:#a9c1ca;font-size:.84rem}
.muted{color:var(--muted)}
.center{text-align:center}
.no-shadow{box-shadow:none}
.compact{padding:18px}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.article-index{display:grid;gap:16px}
.article-item{display:grid;grid-template-columns:180px minmax(0,1fr);gap:18px;padding:20px;border:1px solid var(--line);border-radius:14px}
.article-item h2{font-size:1.2rem;margin:0 0 .4rem}
.article-item p{margin:.25rem 0;color:var(--muted)}
.category-label{font-weight:900;color:var(--teal-dark);font-size:.84rem}
@media (max-width:1050px){
  .article-shell,.tool-shell{grid-template-columns:1fr}
  .toc{position:static}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:820px){
  .nav-toggle{display:inline-flex}
  .primary-nav{
    display:none;position:absolute;left:16px;right:16px;top:68px;flex-direction:column;align-items:stretch;
    background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow)
  }
  .primary-nav.is-open{display:flex}
  .primary-nav a{padding:.75rem}
  .brand-tagline{display:none}
  .hero-grid,.grid-2,.grid-3,.footer-grid{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr}
  .hero{padding:48px 0}
  .article-item{grid-template-columns:1fr;gap:6px}
  .mapper-row{grid-template-columns:1fr 1fr}
  .mapper-row button{grid-column:1/-1}
}
@media (max-width:520px){
  .wrap{width:min(calc(100% - 22px),var(--wrap))}
  .brand-name{font-size:.9rem}
  .header-inner{min-height:68px}
  .page-hero{padding:38px 0}
  .card,.tool-panel{padding:18px}
  .definition{grid-template-columns:1fr;gap:3px}
  .mapper-row{grid-template-columns:1fr}
  .mapper-row button{grid-column:auto}
}
@media print{
  .site-header,.site-footer,.toc,.hero-actions,.nav-toggle,.actions{display:none!important}
  body{font-size:11pt}
  .wrap{width:100%}
  .card,.tool-panel{box-shadow:none}
}

.mt-22{margin-top:22px}.mt-24{margin-top:24px}.mt-46{margin-top:46px}.mt-48{margin-top:48px}.max-980{max-width:980px}.pre-wrap{white-space:pre-wrap;font:inherit;margin:0}