:root {
  --navy:#0B2545;
  --navy2:#13315C;
  --slate:#5B6B7D;
  --accent:#1A56DB;
  --accent2:#2563EB;
  --bg:#F4F6FA;
  --card:#FFFFFF;
  --rule:#D7DEE7;
  --good:#0F7B3F;
  --soft:#E8F0FE;
}
* { box-sizing:border-box; }
html, body { margin:0; padding:0; background:var(--bg); color:#1B2A3A;
  font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  line-height:1.6; -webkit-font-smoothing:antialiased;
  overflow-x:hidden; max-width:100vw; }
a { color:var(--accent); text-decoration:none; }
a:hover { text-decoration:underline; }
img { max-width:100%; display:block; }

/* ---- Top nav ---- */
.topnav {
  position:sticky; top:0; z-index:50;
  background:var(--navy); color:#fff;
  box-shadow:0 2px 8px rgba(0,0,0,.18);
}
.topnav .bar {
  max-width:1180px; margin:0 auto; padding:0 20px;
  display:flex; align-items:center; gap:18px; height:58px;
}
.topnav .brand { font-weight:800; font-size:16px; letter-spacing:.2px; white-space:nowrap; }
.topnav .brand .v { color:#9EC5FE; font-weight:600; font-size:12px; margin-left:6px; }
.topnav .links { display:flex; align-items:center; gap:6px; margin-left:8px; }
.topnav .links a {
  color:#CBD5E1; padding:8px 12px; border-radius:6px; font-size:14px; font-weight:500;
}
.topnav .links a:hover { background:rgba(255,255,255,.10); color:#fff; text-decoration:none; }
.topnav .links a.active { color:#fff; background:rgba(255,255,255,.12); }
.topnav .spacer { flex:1 1 auto; }
.topnav .ext { display:flex; align-items:center; gap:6px; }
.topnav .ext a {
  color:#9EC5FE; font-size:13px; padding:7px 10px; border:1px solid rgba(255,255,255,.18);
  border-radius:6px;
}
.topnav .ext a:hover { background:rgba(255,255,255,.10); text-decoration:none; }
.topnav .hamburger {
  display:none; background:none; border:0; cursor:pointer; padding:6px; color:#fff;
}
.topnav .hamburger svg { width:26px; height:26px; }

@media (max-width:860px) {
  .topnav .bar { height:52px; gap:8px; padding:0 12px; }
  .topnav .brand { font-size:14px; max-width:52vw; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
  .topnav .links {
    display:none; position:absolute; top:52px; left:0; right:0;
    background:var(--navy2); flex-direction:column; align-items:stretch;
    gap:0; padding:8px 14px; box-shadow:0 6px 12px rgba(0,0,0,.2);
  }
  .topnav .links.open { display:flex; }
  .topnav .links a { padding:12px 10px; border-radius:0; border-bottom:1px solid rgba(255,255,255,.08); }
  .topnav .links a.mobile-only { display:block; }
  .topnav .hamburger { display:inline-flex; }
  .topnav .ext { display:none; }
}

/* ---- Layout ---- */
.wrap { max-width:1180px; margin:0 auto; padding:28px 20px 80px; }
.wrap { max-width:1280px; }
.hero { text-align:center; padding:56px 20px 40px; }
.hero h1 { color:var(--navy); font-size:clamp(28px,5vw,44px); margin:0 0 12px; letter-spacing:-.5px; }
.hero .sub { color:var(--slate); font-size:clamp(15px,2.4vw,20px); max-width:760px; margin:0 auto 20px; }
.hero h1, .hero .sub { overflow-wrap:break-word; }
.hero .chip {
  display:inline-block; background:var(--soft); color:var(--navy);
  border:1px solid #BFD3F2; border-radius:999px; padding:6px 16px; font-size:13px; font-weight:600;
  margin-bottom:18px;
}
.hero .chip a { color:var(--accent); }
.cta-row { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-top:18px; }
.btn {
  display:inline-block; padding:13px 22px; border-radius:8px; font-weight:700; font-size:15px;
  background:var(--accent); color:#fff; border:0; cursor:pointer; text-decoration:none;
}
.btn:hover { background:var(--accent2); text-decoration:none; }
.btn.ghost { background:transparent; color:var(--navy); border:1.5px solid var(--navy); }
.btn.ghost:hover { background:var(--navy); color:#fff; }

/* ---- Stats ---- */
.stats { display:grid; grid-template-columns:repeat(4,1fr); gap:14px; max-width:860px; margin:34px auto; }
.stat { background:var(--card); border:1px solid var(--rule); border-radius:12px; padding:18px 12px; text-align:center; }
.stat .n { font-size:clamp(26px,4vw,36px); font-weight:800; color:var(--navy); line-height:1; }
.stat .l { color:var(--slate); font-size:12px; font-weight:600; margin-top:6px; text-transform:uppercase; letter-spacing:.4px; }
@media (max-width:620px) { .stats { grid-template-columns:repeat(2,1fr); } }

@media (max-width:620px) {
  .hero { padding:34px 14px 26px; }
  .hero h1 { font-size:25px; }
  .hero .sub { font-size:14.5px; }
  .cta-row { flex-direction:column; align-items:stretch; gap:10px; }
  .cta-row .btn { width:100%; text-align:center; }
  .cards { grid-template-columns:1fr; }
  .stat { padding:14px 8px; }
  .stat .n { font-size:24px; }
  .prose h2 { font-size:20px; }
  .prose h3 { font-size:16px; }
  .prose .note { padding:12px 14px; }
  .viewer img { width:100%; }
  .toc-toggle { width:100%; justify-content:center; }
  .pager { flex-wrap:wrap; justify-content:center; }
}

/* ---- Section cards ---- */
.cards { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:16px; margin-top:30px; }
.card {
  background:var(--card); border:1px solid var(--rule); border-radius:12px; padding:20px;
  transition:box-shadow .15s, transform .15s;
}
.card:hover { box-shadow:0 6px 18px rgba(11,37,69,.10); transform:translateY(-2px); }
.card h3 { color:var(--navy); margin:0 0 8px; font-size:17px; }
.card p { color:var(--slate); margin:0 0 12px; font-size:14px; }
.card a.more { font-weight:700; font-size:13px; }
.card .tag { display:inline-block; font-size:11px; font-weight:700; color:var(--accent);
  background:var(--soft); border-radius:6px; padding:3px 8px; margin-bottom:10px; letter-spacing:.3px; }

/* ---- Prose (about) ---- */
.prose { max-width:820px; margin:0 auto; }
.prose h2 { color:var(--navy); font-size:24px; margin:30px 0 10px; }
.prose h3 { color:var(--navy); font-size:18px; margin:22px 0 8px; }
.prose p { margin:0 0 14px; }
.prose ul { margin:0 0 16px; padding-left:22px; }
.prose li { margin-bottom:6px; }
.prose .note {
  background:var(--soft); border-left:4px solid var(--accent); padding:14px 18px;
  border-radius:0 8px 8px 0; margin:18px 0; color:var(--navy);
}
.prose .caveat { background:#FFF7ED; border-left-color:#C2410C; }

/* ---- Document viewer ---- */
.doc-layout { display:grid; grid-template-columns:230px 1fr; gap:22px; align-items:start; }
.toc-toggle { display:none; }
.toc {
  position:sticky; top:74px; max-height:calc(100vh - 90px); overflow:auto;
  background:var(--card); border:1px solid var(--rule); border-radius:12px; padding:14px;
}
.toc h4 { color:var(--slate); font-size:11px; text-transform:uppercase; letter-spacing:.6px; margin:0 0 10px; }
.toc a {
  display:block; padding:8px 10px; border-radius:7px; color:#334155; font-size:13.5px;
  border-left:3px solid transparent; margin-bottom:2px;
}
.toc a:hover { background:var(--bg); text-decoration:none; }
.toc a.active { background:var(--soft); color:var(--navy); font-weight:700; border-left-color:var(--accent); }
.toc a .pg { float:right; color:var(--slate); font-size:11px; font-weight:600; }

.viewer {
  background:#525659; border-radius:12px; padding:10px; min-height:60vh;
  display:flex; flex-direction:column; align-items:center; gap:12px;
}
.viewer img {
  width:100%; height:auto; max-width:1241px; max-height:none;
  margin:0 auto;
  border-radius:6px; box-shadow:0 6px 24px rgba(0,0,0,.4); background:#fff;
}
.pager { display:flex; align-items:center; gap:14px; color:#E5E7EB; }
.pager button {
  background:rgba(255,255,255,.12); color:#fff; border:1px solid rgba(255,255,255,.25);
  border-radius:8px; padding:8px 16px; font-size:14px; font-weight:600; cursor:pointer;
}
.pager button:disabled { opacity:.35; cursor:not-allowed; }
.pager .ind { font-size:14px; font-weight:600; min-width:90px; text-align:center; }
.sec-title { color:#fff; font-size:14px; font-weight:600; text-align:center; min-height:20px; }

@media (max-width:860px) {
  .doc-layout { grid-template-columns:1fr; }
  .toc { position:static; max-height:none; margin-bottom:16px; }
  .toc.collapsed { display:none; }
  .toc-toggle { display:inline-flex; margin-bottom:10px; }
  .viewer img { width:100%; max-width:100%; height:auto; }
}

/* ---- Footer ---- */
.site-footer {
  background:var(--navy); color:#CBD5E1; padding:26px 20px; margin-top:60px;
}
.site-footer .inner { max-width:1180px; margin:0 auto; display:flex; gap:18px; flex-wrap:wrap;
  align-items:center; justify-content:space-between; }
.site-footer a { color:#9EC5FE; }
.site-footer .esl { font-weight:700; color:#fff; }
.site-footer .small { font-size:12px; }
@media (max-width:620px) { .site-footer .inner { flex-direction:column; text-align:center; } }

@media (max-width:480px) {
  .topnav .brand .v { display:none; }
  .hero h1 { font-size:22px; }
  .stat .l { font-size:10px; letter-spacing:.2px; }
  .pager button { padding:7px 12px; font-size:13px; }
  .pager .ind { min-width:72px; }
}