:root{
  --primary:#a16207;
  --secondary:#713f12;
  --accent:#0e7490;
  --bg:#ffffff;
  --surface:#fef3c7;
  --surface-alt:#fde68a;
  --text:#713f12;
  --muted:#5d6a76;
  --border:#fcd34d;
  --row-alt:#fef3c7;
  --radius:4px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.65;
  font-size:16px;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:underline}
a:hover{color:var(--primary)}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:linear-gradient(90deg,var(--primary) 0%,var(--secondary) 100%);
  color:#fff;
  box-shadow:0 2px 8px rgba(113,63,18,0.25);
}
.site-header .wrap{
  max-width:1100px;
  margin:0 auto;
  padding:12px 20px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  text-decoration:none;
  font-weight:700;
  font-size:1.15rem;
  letter-spacing:0.2px;
}
.brand img{width:34px;height:34px;background:#fff;border-radius:4px;padding:2px}
nav.primary ul{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:4px 14px;
}
nav.primary a{
  color:#fff;
  text-decoration:none;
  font-weight:500;
  padding:6px 8px;
  border-radius:var(--radius);
  font-size:0.95rem;
}
nav.primary a:hover{background:rgba(255,255,255,0.15)}

/* Hero */
.hero{
  background:linear-gradient(135deg,var(--surface) 0%,var(--surface-alt) 100%);
  border-bottom:3px solid var(--primary);
  padding:44px 20px 40px;
}
.hero .wrap{max-width:1100px;margin:0 auto}
.hero h1{
  font-size:2.05rem;
  margin:0 0 12px;
  color:var(--secondary);
  line-height:1.2;
  letter-spacing:-0.3px;
}
.byline{
  font-size:0.9rem;
  color:var(--muted);
  margin:0 0 18px;
}
.byline strong{color:var(--secondary)}
.intro{font-size:1.08rem;margin:0 0 18px;max-width:820px}
.cta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.cta{
  display:inline-block;
  padding:10px 18px;
  border-radius:var(--radius);
  text-decoration:none;
  font-weight:600;
  border:2px solid transparent;
}
.cta.primary{background:var(--primary);color:#fff}
.cta.primary:hover{background:var(--secondary);color:#fff}
.cta.ghost{background:transparent;color:var(--secondary);border-color:var(--secondary)}
.cta.ghost:hover{background:var(--secondary);color:#fff}

/* Main */
main{max-width:1100px;margin:0 auto;padding:32px 20px 40px}

/* ToC */
.toc{
  background:var(--surface);
  border-left:4px solid var(--accent);
  border-radius:var(--radius);
  padding:16px 20px;
  margin:0 0 30px;
}
.toc-title{font-weight:700;margin:0 0 8px;color:var(--secondary)}
.toc ol{margin:0;padding-left:22px}
.toc li{margin:3px 0}
.toc a{color:var(--secondary)}

/* Sections */
main h2{
  font-size:1.5rem;
  margin:34px 0 14px;
  padding:10px 14px;
  color:var(--secondary);
  background:var(--surface);
  border-left:5px solid var(--primary);
  border-radius:0 var(--radius) var(--radius) 0;
  scroll-margin-top:80px;
}
main h3{color:var(--secondary);font-size:1.15rem;margin-top:24px}
main p{margin:0 0 14px}
main ul,main ol{margin:0 0 16px;padding-left:26px}
main ul li{list-style:none;position:relative;margin:6px 0}
main ul li::before{
  content:"▸";
  color:var(--accent);
  position:absolute;
  left:-18px;
  font-weight:700;
}
main ol{list-style:none;counter-reset:step;padding-left:0}
main ol li{
  counter-increment:step;
  position:relative;
  padding:4px 0 4px 40px;
  margin:6px 0;
}
main ol li::before{
  content:counter(step);
  position:absolute;
  left:0;
  top:2px;
  width:28px;
  height:28px;
  border-radius:50%;
  background:var(--accent);
  color:#fff;
  text-align:center;
  line-height:28px;
  font-weight:700;
  font-size:0.9rem;
}

/* Tables */
.table-wrap{overflow-x:auto;margin:14px 0 22px;border-radius:var(--radius);border:1px solid var(--border)}
table{width:100%;border-collapse:collapse;min-width:520px;background:var(--bg)}
thead th{
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  color:#fff;
  text-align:left;
  padding:10px 12px;
  font-size:0.95rem;
}
tbody td{padding:9px 12px;border-top:1px solid var(--border);font-size:0.95rem}
tbody tr:nth-child(even) td{background:var(--row-alt)}

/* FAQ accordion */
details{
  border:1px solid var(--border);
  border-radius:var(--radius);
  margin:8px 0;
  background:var(--bg);
}
details summary{
  padding:12px 42px 12px 14px;
  font-weight:600;
  cursor:pointer;
  color:var(--secondary);
  position:relative;
  list-style:none;
}
details summary::-webkit-details-marker{display:none}
details summary::after{
  content:"▼";
  position:absolute;
  right:14px;
  top:50%;
  transform:translateY(-50%);
  color:var(--accent);
  transition:transform 0.2s;
  font-size:0.85rem;
}
details[open] summary::after{transform:translateY(-50%) rotate(180deg)}
details .a{padding:0 14px 14px}

/* Cards */
.card-grid{display:grid;gap:16px;grid-template-columns:1fr;margin:16px 0 22px}
.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-left:4px solid var(--accent);
  border-radius:var(--radius);
  padding:16px 18px;
}
.card h3{margin:0 0 8px;color:var(--secondary)}

/* Callout */
.callout{
  background:var(--surface-alt);
  border-left:5px solid var(--accent);
  padding:14px 18px;
  border-radius:var(--radius);
  margin:16px 0;
}

/* Author box */
.author-box{
  display:flex;
  gap:16px;
  align-items:flex-start;
  background:linear-gradient(135deg,var(--surface) 0%,var(--surface-alt) 100%);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  margin:30px 0 0;
}
.author-box img{
  width:72px;
  height:72px;
  border-radius:50%;
  border:3px solid var(--primary);
  flex-shrink:0;
  background:#fff;
}
.author-box h3{margin:0 0 4px;color:var(--secondary)}
.author-box .role{font-size:0.9rem;color:var(--accent);font-weight:600;margin:0 0 6px}
.author-box p{margin:0;font-size:0.95rem}

/* Figures */
figure{margin:18px 0;text-align:center}
figure svg{max-width:100%;height:auto}
figcaption{font-size:0.85rem;color:var(--muted);margin-top:6px;font-style:italic}

/* Footer */
.site-footer{
  background:var(--secondary);
  color:#f5e6d3;
  padding:26px 20px 20px;
  margin-top:40px;
}
.site-footer .wrap{max-width:1100px;margin:0 auto}
.site-footer a{color:var(--surface-alt)}
.footer-nav{
  display:flex;
  flex-wrap:wrap;
  gap:12px 18px;
  margin:0 0 14px;
  padding:0;
  list-style:none;
}
.footer-nav a{text-decoration:none}
.footer-nav a:hover{text-decoration:underline}
.site-footer small{color:#d6b78a;display:block;font-size:0.85rem;line-height:1.5}

/* Responsive */
@media(min-width:700px){
  .hero{padding:56px 20px 52px}
  .hero h1{font-size:2.5rem}
  main{padding:40px 20px 60px}
  main h2{font-size:1.75rem}
  .card-grid{grid-template-columns:1fr 1fr}
}
@media(min-width:980px){
  .hero h1{font-size:2.85rem}
  .card-grid{grid-template-columns:1fr 1fr 1fr}
}

/* 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}}