:root{--bg: #0f1320;--panel: #1a1f2e;--panel2: #232a3d;--line: #2d3548;--text: #e6e9f0;--muted: #8b93a7;--accent: #4f8cff;--danger: #e5484d;--ok: #30a46c}*{box-sizing:border-box}html,body{margin:0;height:100%}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px}.shell{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);padding:16px 0}.brand{font-weight:700;font-size:16px;padding:0 18px 16px}.sidebar nav{display:flex;flex-direction:column}.sidebar nav a{color:var(--muted);text-decoration:none;padding:9px 18px;font-weight:500;border-left:3px solid transparent}.sidebar nav a:hover{color:var(--text);background:var(--panel2)}.sidebar nav a.active{color:var(--text);border-left-color:var(--accent);background:var(--panel2)}.navgroup{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.08em;padding:16px 18px 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