:root{
  --plum:#531B59;--plum-d:#3E1343;--plum-mid:#6C5B81;
  --plum-50:#F7EFF8;--plum-100:#EBD9EE;--plum-200:#D9CCE3;
  --ink:#1D1534;--muted:#5A4E6E;--line:#CDBFD4;
  --bg:#FBF8FC;--card:#fff;--on-primary:#fff;
  --ok:#1B7A45;--focus:#6C5B81;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);line-height:1.5}
a{color:var(--plum);text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{color:var(--plum-d)}
.wrap{max-width:960px;margin:0 auto;padding:0 1.25rem 3rem}
.top{
  background:linear-gradient(135deg,var(--plum) 0%,var(--plum-d) 100%);
  color:var(--on-primary);padding:1.25rem 0 1.5rem;
  border-bottom:4px solid var(--plum-mid);
}
.top .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:1rem;justify-content:space-between}
.brand{display:flex;align-items:center;gap:.75rem;color:inherit;text-decoration:none}
.mark{
  width:40px;height:40px;border-radius:10px;background:#fff;color:var(--plum);
  display:grid;place-items:center;font-weight:800;font-size:1.1rem;
}
.brand h1{margin:0;font-size:1.25rem;font-weight:700;letter-spacing:-.02em}
.brand .sub{margin:0;font-size:.8rem;opacity:.9}
.nav{display:flex;flex-wrap:wrap;gap:.5rem .9rem;font-size:.9rem}
.nav a{color:#fff;text-decoration:none;opacity:.92}
.nav a:hover{opacity:1;text-decoration:underline}
.hero{padding:2rem 0 1rem}
.hero h2{margin:0 0 .5rem;font-size:1.85rem;color:var(--plum);letter-spacing:-.03em}
.hero p{margin:0;max-width:42rem;color:var(--muted);font-size:1.05rem}
.meta{
  display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0 0;
}
.chip{
  display:inline-block;padding:.25rem .65rem;border-radius:999px;
  background:var(--plum-100);color:var(--plum-d);font-size:.75rem;font-weight:600;
}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem;margin:1.5rem 0}
.card{
  background:var(--card);border:1px solid var(--plum-200);border-radius:12px;
  padding:1rem 1.1rem;box-shadow:0 1px 2px rgba(29,21,52,.04);
}
.card h3{margin:0 0 .35rem;font-size:1.05rem;color:var(--plum-d)}
.card p{margin:0;font-size:.92rem;color:var(--muted)}
.card a.more{display:inline-block;margin-top:.65rem;font-size:.88rem;font-weight:600}
.section{margin:2rem 0}
.section h2{margin:0 0 .75rem;font-size:1.35rem;color:var(--plum);border-bottom:2px solid var(--plum-100);padding-bottom:.35rem}
table{width:100%;border-collapse:collapse;font-size:.92rem;background:var(--card);border-radius:10px;overflow:hidden;border:1px solid var(--plum-200)}
th,td{text-align:left;padding:.55rem .7rem;border-bottom:1px solid var(--plum-100);vertical-align:top}
th{background:var(--plum-50);color:var(--plum-d);font-weight:600;width:28%}
tr:last-child td{border-bottom:0}
.diagram{background:var(--card);border:1px solid var(--plum-200);border-radius:12px;padding:1rem;overflow:auto}
.diagram img,.diagram object{max-width:100%;height:auto;display:block;margin:0 auto}
.foot{
  margin-top:3rem;padding:1.25rem 0;border-top:1px solid var(--plum-200);
  font-size:.85rem;color:var(--muted);
}
.foot a{color:var(--plum-mid)}
.btn{
  display:inline-block;margin-top:1rem;padding:.55rem 1rem;border-radius:8px;
  background:var(--plum);color:#fff!important;text-decoration:none;font-weight:600;font-size:.92rem;
}
.btn:hover{background:var(--plum-d)}
.btn.secondary{background:var(--card);color:var(--plum)!important;border:1px solid var(--plum-200)}
ul.links{margin:.5rem 0 0;padding:0 0 0 1.1rem}
ul.links li{margin:.35rem 0}
code,kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em;background:var(--plum-50);padding:.1em .35em;border-radius:4px}
@media (max-width:640px){
  .hero h2{font-size:1.45rem}
  .top .wrap{flex-direction:column;align-items:flex-start}
}