:root{--bg:#f6f7f9;--surface:#fff;--border:#e3e6ea;--text:#16181d;--muted:#646b76;--accent:#0f766e;--accent-soft:#e6f4f2;color:var(--text);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#111317;--surface:#1a1d23;--border:#2a2f37;--text:#e8eaed;--muted:#9aa1ab;--accent:#2dd4bf;--accent-soft:#15302d}}*{box-sizing:border-box}body{background:var(--bg);margin:0}h1,h2{margin:0}.shell{min-height:100vh;display:flex}.sidebar{background:var(--surface);border-right:1px solid var(--border);flex-shrink:0;width:220px;padding:20px 12px}.brand{align-items:center;gap:10px;padding:0 8px 20px;font-size:18px;font-weight:700;display:flex}.sidebar nav{flex-direction:column;gap:2px;display:flex}.sidebar a{color:var(--muted);border-radius:8px;padding:9px 12px;font-size:14px;text-decoration:none}.sidebar a:hover{color:var(--text);background:var(--bg)}.sidebar a.active{color:var(--accent);background:var(--accent-soft);font-weight:600}.content{flex:1;max-width:1200px;padding:32px}.page-head{margin-bottom:24px}.page-head p{color:var(--muted);margin:6px 0 0}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}.card h2{margin-bottom:8px;font-size:16px}.card p{color:var(--muted);margin:0}.stats{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:16px;display:grid}.stat{flex-direction:column;gap:8px;display:flex}.stat-label{color:var(--muted);font-size:13px}.stat-value{font-size:28px;font-weight:700}@media (width<=720px){.shell{flex-direction:column}.sidebar{border-right:0;border-bottom:1px solid var(--border);width:100%;padding:12px 16px}.brand{padding-bottom:10px}.sidebar nav{flex-direction:row;overflow-x:auto}.content{padding:20px 16px}}