/* a0026 — Top nav + grid-areas (light) */
:root{
  --bg:#f6f7fb;
  --paper:#ffffff;
  --ink:#182234;
  --muted:#5b6473;
  --line:#e6e9f2;
  --brand:#1f4bd8;
  --brand2:#0ea5e9;
  --shadow:0 10px 30px rgba(16,24,40,.08);
  --radius:14px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 18px}

.sitehead{padding:18px 0;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fff,rgba(255,255,255,.6))}
.head-row{display:flex;gap:16px;align-items:center}
#logo img{height:42px;width:auto;display:block}
.titles{flex:1;min-width:0}
.site-title{font-weight:700;letter-spacing:.2px}
.tagline{color:var(--muted);font-size:14px}
.head-slot{min-width:220px;text-align:right;color:var(--muted);font-size:13px}

.topnav{position:sticky;top:0;z-index:10;background:rgba(246,247,251,.78);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav-list{display:flex;gap:10px;list-style:none;margin:0;padding:10px 0;flex-wrap:wrap}
.nav-list a{display:block;padding:8px 12px;border-radius:999px;color:var(--muted)}
.nav-list li.active a{background:rgba(31,75,216,.12);color:var(--brand)}

.layout-grid{padding:18px 0 30px}
.grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:18px;align-items:start}
.paper{background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius);padding:18px;overflow:hidden}
.side .card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:0 8px 18px rgba(16,24,40,.06)}
.side .card + .card{margin-top:12px}
.card-title{font-weight:700;margin-bottom:8px}
.mini{margin:0;padding-left:18px;color:var(--muted)}

#footer{margin-top:28px;border-top:1px solid var(--line);background:#fff}
#footer .container{padding:18px}
#footer .social a{display:inline-flex;align-items:center;gap:8px;margin-right:8px;padding:8px 10px;border-radius:10px;border:1px solid var(--line);background:#fff}
#footer p{margin:10px 0 0;color:var(--muted)}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

@media (max-width: 920px){
  .grid{grid-template-columns:1fr}
  .head-slot{display:none}
}