:root{
  --primary:#1f2937;
  --secondary:#111827;
  --accent:#65a30d;
  --accent-dark:#4d7c0f;
  --bg:#ffffff;
  --surface:#f9fafb;
  --surface-alt:#f3f4f6;
  --text:#111827;
  --muted:#6b7280;
  --border:#d1d5db;
  --row-alt:#f9fafb;
  --radius:4px;
  --shadow:0 2px 8px rgba(17,24,39,.08);
  --shadow-lg:0 6px 20px rgba(17,24,39,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent-dark);text-decoration:underline;text-underline-offset:2px}
a:hover{color:var(--primary)}
.container{max-width:1080px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:linear-gradient(90deg,var(--secondary) 0%,var(--primary) 100%);color:#fff;box-shadow:var(--shadow)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding-top:12px;padding-bottom:12px;flex-wrap:wrap;gap:12px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;font-size:18px}
.brand img{width:36px;height:36px}
.brand-name{letter-spacing:.3px}
.brand-name span{color:var(--accent)}
.nav{display:flex;flex-wrap:wrap;gap:6px}
.nav a{color:#e5e7eb;text-decoration:none;padding:6px 10px;border-radius:var(--radius);font-size:14.5px;font-weight:500;transition:background .15s,color .15s}
.nav a:hover,.nav a[aria-current="page"]{background:rgba(101,163,13,.18);color:#fff}

/* Hero */
.hero{background:linear-gradient(135deg,var(--secondary) 0%,var(--primary) 60%,#374151 100%);color:#fff;padding:52px 0 44px;border-bottom:4px solid var(--accent)}
.hero h1{font-size:2rem;margin:0 0 10px;line-height:1.2;font-weight:800;letter-spacing:-.3px}
.hero .byline{color:#d1d5db;font-size:14px;margin:0 0 18px}
.hero .byline strong{color:var(--accent)}
.hero .intro p{font-size:1.05rem;margin:.4em 0;color:#f3f4f6;max-width:720px}
.hero-cta{margin-top:20px;display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:11px 20px;border-radius:var(--radius);text-decoration:none;font-weight:600;font-size:15px;transition:background .15s,transform .15s;border:0}
.btn:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px)}
.btn.secondary{background:transparent;color:#fff;border:1.5px solid #d1d5db}
.btn.secondary:hover{background:rgba(255,255,255,.08);color:#fff}

/* Main */
main{padding:36px 0 48px}
main h2{font-size:1.5rem;margin:2.2em 0 .6em;padding-left:14px;border-left:4px solid var(--accent);line-height:1.25;color:var(--primary);font-weight:700}
main h3{font-size:1.15rem;margin:1.4em 0 .4em;color:var(--primary);font-weight:600}
main p{margin:.7em 0}
main ul,main ol{margin:1em 0;padding-left:0;list-style:none}
main ul li{position:relative;padding:6px 0 6px 26px;margin:.15em 0}
main ul li::before{content:"➤";position:absolute;left:2px;top:6px;color:var(--accent);font-weight:700}
main ol{counter-reset:oli}
main ol li{position:relative;padding:6px 0 6px 40px;margin:.2em 0;counter-increment:oli}
main ol li::before{content:counter(oli);position:absolute;left:0;top:4px;width:26px;height:26px;background:var(--accent);color:#fff;border-radius:50%;text-align:center;line-height:26px;font-weight:700;font-size:13px}

/* ToC */
.toc{background:var(--surface-alt);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:var(--radius);padding:18px 22px;margin:1.4em 0}
.toc strong{display:block;margin-bottom:8px;color:var(--primary);font-size:15px;text-transform:uppercase;letter-spacing:.5px}
.toc ul{margin:0;padding:0;columns:2;column-gap:24px}
.toc ul li{padding:3px 0 3px 22px;margin:0;break-inside:avoid}
.toc ul li::before{content:"›";color:var(--accent);font-weight:700;left:6px;top:3px}
.toc a{color:var(--primary);text-decoration:none;font-size:14.5px}
.toc a:hover{color:var(--accent-dark);text-decoration:underline}

/* Table */
.table-wrap{overflow-x:auto;margin:1.4em 0;border-radius:var(--radius);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;background:#fff;font-size:14.5px}
thead th{background:linear-gradient(90deg,var(--primary) 0%,var(--secondary) 100%);color:#fff;text-align:left;padding:12px 14px;font-weight:600;letter-spacing:.2px}
tbody td{padding:11px 14px;border-bottom:1px solid var(--border);vertical-align:top}
tbody tr:nth-child(even){background:var(--row-alt)}
tbody tr:hover{background:#ecfccb}

/* Callout */
.callout{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:var(--radius);padding:14px 18px;margin:1.2em 0}
.callout strong{color:var(--primary)}

/* FAQ */
details{background:#fff;border:1px solid var(--border);border-radius:var(--radius);margin:.5em 0;overflow:hidden;transition:box-shadow .15s}
details:hover{box-shadow:var(--shadow)}
details summary{cursor:pointer;padding:14px 42px 14px 16px;font-weight:600;color:var(--primary);position:relative;list-style:none}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"▼";position:absolute;right:16px;top:50%;transform:translateY(-50%);color:var(--accent);transition:transform .2s;font-size:12px}
details[open] summary::after{transform:translateY(-50%) rotate(180deg)}
details[open] summary{background:var(--surface-alt);border-bottom:1px solid var(--border)}
details .a{padding:12px 18px 16px}
details .a p{margin:.3em 0}

/* Figures */
figure{margin:1.4em 0;text-align:center}
figure svg{max-width:100%;height:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px}
figcaption{font-size:13.5px;color:var(--muted);margin-top:6px;font-style:italic}

/* Author box */
.author-box{margin:2.4em 0 1em;background:linear-gradient(135deg,var(--surface) 0%,var(--surface-alt) 100%);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:var(--radius);padding:18px 20px;display:flex;gap:16px;align-items:flex-start}
.author-box img{width:72px;height:72px;border-radius:50%;flex-shrink:0;border:2px solid var(--accent)}
.author-box .who{font-weight:700;color:var(--primary);font-size:16px}
.author-box .role{color:var(--muted);font-size:14px;margin-bottom:6px}
.author-box p{margin:.2em 0;font-size:14.5px}

/* Sub-cta */
.subcards{display:grid;grid-template-columns:1fr;gap:14px;margin:1.4em 0}
.subcards a.card{background:#fff;border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:var(--radius);padding:14px 18px;text-decoration:none;color:var(--primary);transition:box-shadow .15s,transform .15s}
.subcards a.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}
.subcards a.card strong{display:block;font-size:15.5px;margin-bottom:4px}
.subcards a.card span{color:var(--muted);font-size:14px}

/* Footer */
.site-footer{background:var(--secondary);color:#d1d5db;padding:32px 0 22px;margin-top:36px;border-top:4px solid var(--accent)}
.site-footer .cols{display:grid;grid-template-columns:1fr;gap:18px;margin-bottom:20px}
.site-footer strong{color:#fff;display:block;margin-bottom:6px;font-size:15px}
.site-footer a{color:#d1d5db;text-decoration:none;font-size:14px}
.site-footer a:hover{color:var(--accent);text-decoration:underline}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer ul li{padding:2px 0}
.site-footer .base{border-top:1px solid #374151;padding-top:14px;font-size:13px;color:#9ca3af;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* Responsive */
@media (min-width:700px){
  .hero h1{font-size:2.6rem}
  main h2{font-size:1.7rem}
  .subcards{grid-template-columns:1fr 1fr 1fr}
  .site-footer .cols{grid-template-columns:2fr 1fr 1fr}
}
@media (min-width:980px){
  .hero{padding:70px 0 60px}
  .hero h1{font-size:3rem}
}
@media (max-width:699px){
  .toc ul{columns:1}
  .nav{width:100%;justify-content:flex-start}
  .brand-name{font-size:16px}
}

/* a11y additions */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;border-radius:4px;z-index:1000;text-decoration:none;font-weight:700}
.skip-link:focus{left:12px;top:12px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}}