:root{
  --brand:#0ea36b;
  --brand-dark:#0b7e53;
  --ink:#1e293b;
  --muted:#64748b;
  --paper:#ffffff;
  --bg:#f6faf9;
  --ring:rgba(14,163,107,.35);
  --radius:14px;
  --shadow:0 10px 24px rgba(0,0,0,.06);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
}

/* Header */
.site-header{
  max-width:1100px;
  margin:0 auto;
  padding:18px 20px;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.brand{
  font-weight:700;
  color:var(--brand-dark);
  text-decoration:none;
}
.breadcrumbs{
  font-size:.92rem;
  color:var(--muted);
}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{text-decoration:underline}

/* Layout */
.container{
  max-width:1100px;
  margin:10px auto 60px;
  padding:0 20px;
}
.paper{
  background:var(--paper);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:34px 28px;
}

/* Headings */
h1{
  margin:0 0 8px 0;
  font-size:2rem;
  color:var(--brand-dark);
}
h2{
  margin:28px 0 10px;
  font-size:1.25rem;
  color:#0f172a;
}
h3{margin:18px 0 6px;font-size:1.05rem;color:#1f2937}
h4{margin:14px 0 6px;font-size:1rem}

/* Content helpers */
.panel{
  background:#f1f6f5;
  border:1px solid #e2e8f0;
  border-left:4px solid var(--brand);
  padding:14px 16px;
  border-radius:10px;
  margin:14px 0;
}
.callout{
  background:#f8fffc;
  border:1px solid #dbe8e3;
  border-left:4px solid var(--brand);
  padding:14px 16px;
  border-radius:10px;
  margin:14px 0;
}
.callout.info{background:#eef7ff;border-color:#d8e7ff;border-left-color:#0ea5e9}
ul{padding-left:20px}
a{color:#0b5394}
a:hover{text-decoration:none}

/* Footer */
.doc-footer{
  margin-top:30px;
  padding-top:18px;
  border-top:1px solid #e2e8f0;
  color:var(--muted);
  font-size:.95rem;
}
.history ul{margin:8px 0 0 0}

/* Focus ring for accessibility */
a:focus, button:focus { outline: 3px solid var(--ring); outline-offset: 2px; }

/* Print */
@media print{
  body{background:#fff}
  .site-header,.breadcrumbs{display:none}
  .paper{box-shadow:none;border:0;padding:0}
}