:root{
  --bg:#F7F8EF;
  --surface:#FFFFFF;
  --surface-soft:#FAFAD2;
  --surface-green:#EFF8F1;
  --text:#1F2933;
  --muted:#65727E;
  --border:#DDE3D4;
  --brand:#1D9942;
  --brand-dark:#12622E;
  --brand-soft:#DFF3E5;
  --accent:#3F717A;
  --accent-soft:#E3F0F2;
  --warm:#FFB89A;
  --warm-soft:#FFF0EA;
  --danger:#B5345D;
  --shadow:0 12px 28px rgba(31,41,51,.08);
  --radius:16px;
  --wrap:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.65;font-size:16px}
a{color:var(--brand-dark);text-decoration-thickness:2px;text-underline-offset:3px}
a:hover{color:var(--danger)}
img{max-width:100%;height:auto}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-999px;top:auto;background:#fff;color:#000;padding:8px 12px;z-index:20}
.skip-link:focus{left:12px;top:12px}
.site-header{background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:78px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);font-weight:800}
.brand img{width:150px;max-height:70px;object-fit:contain}
.nav-toggle{display:none;border:1px solid var(--border);background:#fff;border-radius:10px;padding:8px 11px;font-weight:700;color:var(--brand-dark)}
.site-nav{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.site-nav a{display:inline-block;padding:8px 10px;border-radius:999px;text-decoration:none;color:var(--text);font-weight:650;font-size:.94rem}
.site-nav a:hover,.site-nav a[aria-current="page"]{background:var(--brand-soft);color:var(--brand-dark)}
.hero{padding:54px 0 42px;background:linear-gradient(135deg,var(--surface-soft),var(--surface-green));border-bottom:1px solid var(--border)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(290px,.65fr);gap:28px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;background:#fff;border:1px solid var(--border);color:var(--brand-dark);font-weight:750;font-size:.9rem}
h1{font-size:clamp(2rem,4vw,4rem);line-height:1.05;margin:16px 0 18px;color:#17212B}
h2{font-size:clamp(1.45rem,2.6vw,2.2rem);line-height:1.2;margin:0 0 14px;color:#17212B}
h3{font-size:1.15rem;margin:0 0 8px;color:#17212B}
p{margin:0 0 16px}.lead{font-size:1.12rem;color:#344451;max-width:74ch}.muted{color:var(--muted)}
.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 16px;border-radius:999px;text-decoration:none;font-weight:800;border:1px solid var(--brand-dark);background:var(--brand);color:#fff}.button:hover{background:var(--brand-dark);color:#fff}.button.secondary{background:#fff;color:var(--brand-dark)}.button.secondary:hover{background:var(--brand-soft);color:var(--brand-dark)}
.hero-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.hero-card ul{margin:8px 0 0;padding-left:21px}
main{padding:40px 0}.section{padding:36px 0}.section.compact{padding:22px 0}.section-title{max-width:820px;margin-bottom:20px}.grid{display:grid;gap:18px}.cards-2{grid-template-columns:repeat(2,minmax(0,1fr))}.cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}.cards-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card,.info-card,.snapshot,.notice,.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 8px 18px rgba(31,41,51,.04);padding:20px}.card.accent{background:var(--surface-green)}.card.warm{background:var(--warm-soft)}.card h3 a{text-decoration:none;color:var(--text)}.card h3 a:hover{color:var(--brand-dark)}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.tag{display:inline-flex;border:1px solid var(--border);background:#fff;border-radius:999px;padding:5px 9px;font-size:.88rem;color:#344451;text-decoration:none}.tag:hover{background:var(--brand-soft);color:var(--brand-dark)}
.list-clean{list-style:none;padding:0;margin:0}.list-clean li{padding:7px 0;border-bottom:1px solid rgba(221,227,212,.75)}.list-clean li:last-child{border-bottom:0}.link-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.link-grid a{background:#fff;border:1px solid var(--border);border-radius:12px;padding:10px 12px;text-decoration:none;color:var(--text);font-weight:650}.link-grid a:hover{background:var(--brand-soft);color:var(--brand-dark)}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff}table{border-collapse:collapse;width:100%;min-width:620px}th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--border)}th{background:var(--surface-green);color:#17212B}tr:last-child td{border-bottom:0}
.diagram{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:0 8px 18px rgba(31,41,51,.04);overflow-x:auto;-webkit-overflow-scrolling:touch}.diagram svg{width:100%;min-width:980px;height:auto;display:block}.diagram-title{font-weight:850;margin-bottom:10px}.node{fill:var(--surface-green);stroke:var(--brand-dark);stroke-width:2}.node-alt{fill:var(--accent-soft);stroke:var(--accent);stroke-width:2}.node-warm{fill:var(--warm-soft);stroke:var(--danger);stroke-width:2}.line{stroke:var(--muted);stroke-width:2.5;stroke-linecap:round}.label{font:800 24px system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;fill:#1F2933}.small-label{font:700 20px system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;fill:#4A5965}
.callout{border-left:5px solid var(--brand);background:#fff;padding:16px 18px;border-radius:0 var(--radius) var(--radius) 0;border-top:1px solid var(--border);border-right:1px solid var(--border);border-bottom:1px solid var(--border)}
.breadcrumb{font-size:.9rem;margin-bottom:18px;color:var(--muted)}.breadcrumb a{text-decoration:none}.page-title{padding:34px 0 20px}.page-title h1{margin-top:0}.content{max-width:900px}.content h2{margin-top:34px}.content ul{padding-left:22px}.content li{margin-bottom:8px}
.faq{display:grid;gap:12px}.faq-item h3{font-size:1rem}.site-footer{background:#10251A;color:#E7F2EA;margin-top:42px}.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:22px;padding:36px 24px}.site-footer a{color:#E7F2EA}.footer-bottom{border-top:1px solid rgba(255,255,255,.15);padding:16px 24px;color:#BED2C4;font-size:.92rem}
.calc-panel{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field label{display:block;font-weight:750;margin-bottom:6px}.field input,.field select{width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:10px;background:#fff;font:inherit}.result-box{margin-top:16px;padding:16px;border-radius:var(--radius);background:var(--surface-green);border:1px solid var(--border)}
@supports selector(.grid:has(.diagram)){
  .grid.cards-2:has(.diagram){grid-template-columns:1fr}
  .grid.cards-2:has(.diagram) .content{max-width:920px}
}
@media (max-width:760px){
  .diagram{padding:14px}
  .diagram svg{min-width:840px}
  .diagram::after{content:"Swipe sideways to view the full diagram.";display:block;margin-top:8px;color:var(--muted);font-size:.92rem}
}
@media (max-width:900px){.hero-grid,.cards-2,.cards-3,.cards-4,.footer-inner{grid-template-columns:1fr}.link-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.site-nav{display:none;position:absolute;left:0;right:0;top:78px;background:#fff;border-bottom:1px solid var(--border);padding:12px 24px}.site-nav.open{display:grid;grid-template-columns:1fr}.nav-toggle{display:inline-flex}.header-inner{position:relative}.brand img{width:130px}.form-grid{grid-template-columns:1fr}}
@media (max-width:560px){.wrap{padding:0 16px}.hero{padding:34px 0}.link-grid{grid-template-columns:1fr}.button-row{display:grid}.button{width:100%}.footer-inner{padding:28px 16px}.footer-bottom{padding:16px}}

.mobile-stack{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.mobile-stack .card{text-align:left}
@media (max-width:760px){.mobile-stack{grid-template-columns:1fr}.mobile-stack .card{padding:18px}}