:root{
  --bg:#ffffff;
  --rail:#f7f7fb;
  --panel:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --accent:#6d28d9;
  --accent2:#f59e0b;
  --border:rgba(17,24,39,.12);
}

html,body{height:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:linear-gradient(180deg, rgba(109,40,217,.05), transparent 35%), var(--bg);color:var(--text)}
a{color:inherit}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.rails{min-height:100vh;display:grid;grid-template-columns:260px minmax(0,1fr) 300px}

.left-rail,.right-rail{background:var(--rail);border-right:1px solid var(--border)}
.right-rail{border-right:0;border-left:1px solid var(--border)}

.rail-head{padding:14px 14px 10px}
#logo a{display:inline-block;font-weight:900;text-decoration:none;padding:10px 12px;border-radius:14px;background:rgba(109,40,217,.10)}

.rail-nav{list-style:none;margin:0;padding:0 12px 14px;display:flex;flex-direction:column;gap:8px}
.rail-nav a{display:block;padding:10px 10px;border-radius:12px;text-decoration:none}
.rail-nav li.active a{background:rgba(245,158,11,.14);font-weight:900}

.pane{padding:16px}
.pane-head{display:flex;gap:12px;align-items:flex-start;justify-content:space-between;margin-bottom:12px}
.pane-tagline{color:var(--muted);max-width:60ch}
.pane-ads{min-width:180px;max-width:360px}
.pane-body{background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:16px;box-shadow:0 10px 24px rgba(17,24,39,.08)}

.rail-card{margin:16px;border:1px dashed rgba(17,24,39,.24);border-radius:18px;background:rgba(255,255,255,.70);padding:12px;position:sticky;top:16px;height:fit-content}

.container{max-width:1120px;margin:0 auto;padding:0 16px}
#footer{border-top:1px solid var(--border);padding:16px 0;background:rgba(247,247,251,.85)}
#footer .social{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:10px}
#footer .social a{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:12px;border:1px solid var(--border);background:#fff}
#footer p{margin:0;color:var(--muted)}

@media (max-width: 1100px){
  .rails{grid-template-columns:240px 1fr}
  .right-rail{display:none}
  .pane-ads{display:none}
}

@media (max-width: 820px){
  .rails{grid-template-columns:1fr}
  .left-rail{position:relative;border-right:0;border-bottom:1px solid var(--border)}
}