:root{
  --sidebar: 240px;
  --bg:#f8fafc;--panel:#ffffff;--muted:#64748b;--text:#0f172a;--line:#e5e7eb;--accent:#2563eb;--card:#ffffff;
}
.dark:root{--bg:#0b1220;--panel:#111827;--muted:#94a3b8;--text:#e5e7eb;--line:#1f2937;--accent:#60a5fa;--card:#0f172a}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,Segoe UI,Roboto,Arial,sans-serif;font-size:14px}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
input, select, textarea, button {
  padding: 8px 10px; border: 1px solid #e5e7eb; border-radius: 10px;
  font: 14px system-ui, Segoe UI, Roboto, Arial, sans-serif;
}
label { display:block; margin:6px 0 4px; color:#374151; }
table { border-collapse: collapse; width: 100% }
th, td { border: 1px solid #e5e7eb; padding: 8px; text-align: left }
th { background: #f8fafc }

/* Topbar */
.topbar{position:sticky;top:0;display:flex;gap:10px;align-items:center;padding:10px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.85);backdrop-filter:blur(10px);z-index:1001}
.brand{font-weight:700}
.btn{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:transparent}
.btn.icon{font-size:16px;line-height:1}
.search{flex:1;max-width:520px}
.search input{width:100%;border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:transparent;color:inherit}

/* Sidebar uses the variable width */
.sidebar{position:fixed;top:48px;left:0;bottom:0;width:var(--sidebar);padding:10px;border-right:1px solid var(--line);background:#fff;overflow:auto;z-index:1000}
.dark .sidebar{background:#0f172a}
.navitem{display:block;padding:9px 10px;border-radius:8px;border:1px solid transparent;color:inherit}
.navitem:hover{background:rgba(148,163,184,.12)} .navitem.active{border-color:var(--accent)}

/* Content & Footer both offset using the same sidebar width */
.content{margin-left:var(--sidebar);padding:16px;min-height:calc(100vh - 48px - 120px)}
.footer{position:relative;border-top:1px solid var(--line);background:#fff;z-index:1;padding:10px;margin-top:20px;margin-left:var(--sidebar)}

/* When collapsed reduce the variable, both content and footer update automatically */
:root.nav-collapsed{ --sidebar: 56px; }

/* Footer internals */
.footer-inner{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;align-items:start}
.footer-links a{margin-right:10px}
.footer-contact{display:flex;flex-direction:column;gap:2px}
.footer-disclaimer{grid-column:1/-1;color:var(--muted);font-size:12px}

/* AI panel stays on top of everything */
.ai-panel{position:fixed;top:48px;right:-360px;width:340px;height:calc(100vh - 48px);background:#fff;border-left:1px solid var(--line);box-shadow:-10px 0 30px rgba(2,8,23,.06);transition:right .2s ease;display:flex;flex-direction:column;z-index:1002}
.dark .ai-panel{background:#0f172a}
:root.ai-open .ai-panel{right:0}
.ai-head{padding:10px;border-bottom:1px solid var(--line);font-weight:700}
.ai-body{padding:10px;display:flex;flex-direction:column;gap:8px}
.ai-body textarea{min-height:140px;border:1px solid var(--line);border-radius:10px;padding:8px;background:transparent;color:inherit}

/* Small screens keep sidebar narrow */
@media (max-width:900px){
  :root{ --sidebar: 56px; }
}