:root {
  --brand-base:#004225; --brand-light:#4C7A66; --brand-ink:#0C1F14;
  --cta-fill:#00341D; --cta-pressed:#002716;
  --bg:#FAFAFA; --bg-elevated:#FFFFFF; --surface-tint:#F4F5F2;
  --border-soft:#E6E8E4; --border-hair:#EDEFEB;
  --text-primary:#0E1410; --text-secondary:#5C766B; --text-tertiary:#82938A;
  --text-on-dark:#F4F1EC;
  --font-display:'Fraunces','Times New Roman',serif;
  --font-body:'Inter',system-ui,-apple-system,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
  --max-w:1080px;
  --gutter:clamp(1.25rem,1rem + 1.5vw,2.5rem);
  --page-section-y:clamp(3rem,2rem + 3vw,5rem);
  --page-gutter:clamp(1.25rem,1rem + 1.5vw,2rem);
  --ease-emphasized:cubic-bezier(0.22,1,0.36,1);
  --ease-out:cubic-bezier(0.16,1,0.3,1);
  --ease-in-out:cubic-bezier(0.65,0,0.35,1);
  --ease:var(--ease-emphasized);
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

*,*::before,*::after{box-sizing:border-box;}
*{margin:0;padding:0;}
html{
  scroll-behavior:smooth;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  background:var(--bg);
}
body{
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.65;
  color:var(--text-primary);
  background:var(--bg);
}
img,svg{display:block;max-width:100%;}
a{color:var(--brand-base);text-decoration:none;}
a:hover{text-decoration:underline;text-underline-offset:3px;}
ul,ol{list-style:none;}

::selection{background:var(--brand-base);color:var(--text-on-dark);}
:focus-visible{outline:2px solid var(--brand-base);outline-offset:3px;border-radius:4px;}
.skip-link{position:absolute;top:-100%;left:1rem;z-index:9999;padding:0.75rem 1.25rem;background:var(--bg-elevated);color:var(--brand-base);font-family:var(--font-body);font-weight:500;font-size:0.875rem;border:2px solid var(--brand-base);border-radius:8px;text-decoration:none;transition:top 0.15s var(--ease-out);}
.skip-link:focus{top:1rem;outline:none;}

.container{
  width:100%;max-width:var(--max-w);
  margin:0 auto;padding-inline:var(--gutter);
}

/* ——— Nav ——— */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:1rem 0;background:transparent;
  border-bottom:1px solid transparent;
  transition:background 0.3s var(--ease),backdrop-filter 0.3s var(--ease),border-color 0.3s var(--ease),padding 0.3s var(--ease);
}
.nav.scrolled{
  background:rgba(250,250,250,0.78);
  backdrop-filter:saturate(160%) blur(24px);
  -webkit-backdrop-filter:saturate(160%) blur(24px);
  border-bottom-color:var(--border-soft);
  padding:0.625rem 0;
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;}
.nav-logo{
  display:flex;align-items:center;gap:0.55rem;
  font-family:var(--font-display);font-weight:500;font-size:1.25rem;
  letter-spacing:-0.02em;color:var(--text-primary);
}
.nav-logo:hover{text-decoration:none;}
.nav-logo img{width:28px;height:28px;object-fit:contain;}
.nav-back{
  display:inline-flex;align-items:center;gap:0.5rem;
  color:var(--text-secondary);font-size:0.875rem;font-weight:500;
  padding:0.5rem 0.75rem;border-radius:999px;
  transition:color 0.2s var(--ease),background 0.2s var(--ease);
}
.nav-back:hover{color:var(--brand-base);text-decoration:none;background:rgba(0,66,37,0.06);}
.nav-back svg{width:16px;height:16px;}

/* ——— Page header ——— */
.page-head{
  position:relative;
  padding:calc(7rem + 1.5rem) 0 var(--page-section-y);
  text-align:center;
  overflow:hidden;
  isolation:isolate;
}
.page-head::before{
  content:'';position:absolute;
  top:-200px;left:50%;transform:translateX(-50%);
  width:800px;height:600px;
  background:radial-gradient(closest-side,rgba(0,66,37,0.07),transparent 70%);
  z-index:-1;pointer-events:none;
}
.page-eyebrow{
  display:inline-flex;align-items:center;gap:0.625rem;
  font-family:var(--font-mono);
  font-size:0.6875rem;letter-spacing:0.18em;text-transform:uppercase;
  color:var(--text-secondary);
}
.page-eyebrow::before{content:'';width:18px;height:1px;background:currentColor;opacity:0.55;}
.page-title{
  font-family:var(--font-display);
  font-weight:400;
  font-size:clamp(2.5rem,1.5rem + 4vw,4.5rem);
  letter-spacing:-0.035em;line-height:1;
  font-variation-settings:"opsz" 144;
  color:var(--text-primary);
  margin-top:1rem;
}
.page-title em{font-style:italic;font-weight:300;color:var(--brand-base);}
.page-meta{
  margin-top:1.25rem;
  font-family:var(--font-mono);
  font-size:0.75rem;letter-spacing:0.1em;text-transform:uppercase;
  color:var(--text-tertiary);
}

/* ——— Article layout ——— */
.article{
  padding:2rem 0 var(--page-section-y);
}
.article-inner{
  display:grid;
  grid-template-columns:1fr;
  gap:3rem;
}
@media (min-width:980px){
  .article-inner{
    grid-template-columns:220px 1fr;
    gap:5rem;
    align-items:start;
  }
}
.toc{
  position:relative;
}
@media (min-width:980px){
  .toc{position:sticky;top:6rem;}
}
.toc h6{
  font-family:var(--font-mono);
  font-size:0.6875rem;letter-spacing:0.18em;text-transform:uppercase;
  color:var(--text-tertiary);
  margin-bottom:1rem;
  padding-bottom:0.75rem;
  border-bottom:1px solid var(--border-hair);
}
.toc ol{
  display:grid;gap:0.5rem;
  counter-reset:toc;
}
.toc li{
  counter-increment:toc;
  font-size:0.875rem;
  line-height:1.4;
}
.toc a{
  color:var(--text-secondary);
  display:inline-block;padding:0.125rem 0 0.125rem 10px;
  margin-left:-12px;
  border-left:2px solid transparent;
  transition:color 180ms var(--ease-out),border-color 180ms var(--ease-out);
}
.toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:0.6875rem;
  color:var(--text-tertiary);
  margin-right:0.625rem;
}
.toc a:hover{color:var(--brand-base);text-decoration:none;}
.toc a[aria-current="location"]{color:var(--brand-base);border-left-color:var(--brand-base);}

.prose{
  max-width:68ch;
}
.prose .lede{
  font-family:var(--font-display);
  font-weight:400;
  font-size:clamp(1.25rem,1rem + 0.8vw,1.5rem);
  line-height:1.4;
  letter-spacing:-0.015em;
  color:var(--text-primary);
  padding:1.25rem 1.5rem;
  border-left:3px solid var(--brand-base);
  background:var(--surface-tint);
  border-radius:0 14px 14px 0;
  margin-bottom:2.5rem;
}
.prose .callout{
  background:#FFF8F0;
  border:1px solid #F0DDC2;
  border-radius:14px;
  padding:1.25rem 1.5rem;
  margin-bottom:2rem;
}
.prose .callout strong{color:#7A3F00;font-weight:600;}
.prose .callout a{color:#7A3F00;text-decoration:underline;text-underline-offset:2px;font-weight:600;}

.prose section{
  margin-bottom:3.25rem;
  scroll-margin-top:7rem;
}
.prose h2{
  font-family:var(--font-display);
  font-weight:400;
  font-size:clamp(1.625rem,1.2rem + 1.4vw,2.125rem);
  line-height:1.1;letter-spacing:-0.025em;
  color:var(--text-primary);
  margin-bottom:1.25rem;
  padding-top:0.5rem;
  font-variation-settings:"opsz" 144;
}
.prose h3{
  font-family:var(--font-display);
  font-weight:500;
  font-size:1.125rem;
  letter-spacing:-0.012em;
  color:var(--text-primary);
  margin:1.75rem 0 0.625rem;
}
.prose p{
  margin-bottom:1.125rem;
  color:var(--text-primary);
}
.prose p strong{color:var(--text-primary);font-weight:600;}
.prose ul,.prose ol{
  margin:0.5rem 0 1.25rem 0;
  padding-left:0;
  display:grid;gap:0.625rem;
}
.prose ul li,.prose ol li{
  position:relative;
  padding-left:1.5rem;
  color:var(--text-primary);
  line-height:1.6;
}
.prose ul li::before{
  content:'';position:absolute;
  left:0;top:0.65em;
  width:5px;height:5px;border-radius:50%;
  background:var(--brand-base);
}
.prose ol{counter-reset:list;}
.prose ol li{counter-increment:list;}
.prose ol li::before{
  content:counter(list,decimal-leading-zero) '.';
  position:absolute;left:0;top:0;
  font-family:var(--font-mono);
  font-size:0.8125rem;
  color:var(--brand-base);
  font-weight:500;
  line-height:1.65;
}
.prose ul li strong,.prose ol li strong{color:var(--text-primary);font-weight:600;}

.prose .data-table{
  width:100%;
  border-collapse:collapse;
  margin:1.25rem 0 1.5rem;
  font-size:0.9375rem;
  border:1px solid var(--border-soft);
  border-radius:14px;
  overflow:hidden;
}
.prose .data-table th{
  background:var(--surface-tint);
  font-family:var(--font-mono);
  font-size:0.6875rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--text-secondary);
  font-weight:500;
  text-align:left;
  padding:0.75rem 1rem;
  border-bottom:1px solid var(--border-soft);
}
.prose .data-table td{
  padding:0.875rem 1rem;
  border-bottom:1px solid var(--border-hair);
  color:var(--text-primary);
  vertical-align:top;
}
.prose .data-table tr:last-child td{border-bottom:0;}

.prose .signoff{
  margin-top:1rem;
  padding:1.5rem;
  background:var(--surface-tint);
  border-radius:14px;
  font-size:0.9375rem;
}
.prose .signoff strong{display:block;font-family:var(--font-display);font-weight:500;font-size:1.0625rem;margin-bottom:0.25rem;}

/* ——— Footer ——— */
.footer{
  background:var(--brand-ink);
  color:var(--text-on-dark);
  padding:4rem 0 2rem;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:3rem;
}
@media (min-width:760px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr;}
}
.footer-brand .nav-logo{color:var(--text-on-dark);}
.footer-tagline{
  margin-top:0.75rem;
  font-size:0.9375rem;
  color:rgba(240,237,232,0.7);
  max-width:32ch;
  line-height:1.55;
}
.footer-col h6{
  font-family:var(--font-mono);
  font-size:0.6875rem;font-weight:500;
  letter-spacing:0.18em;text-transform:uppercase;
  color:rgba(240,237,232,0.55);
  margin-bottom:1rem;
}
.footer-col ul{display:grid;gap:0.625rem;}
.footer-col a{
  color:var(--text-on-dark);
  font-size:0.9375rem;
  opacity:0.8;
  transition:opacity 0.2s var(--ease);
}
.footer-col a:hover{opacity:1;text-decoration:none;}
.footer-bottom{
  margin-top:3rem;padding-top:1.25rem;
  border-top:1px solid rgba(240,237,232,0.10);
  font-size:0.8125rem;color:rgba(240,237,232,0.55);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:0.5rem;
}