:root{--bg: #f1f5f9;--panel: #ffffff;--ink: #0f172a;--muted: #64748b;--line: #e2e8f0;--accent: #0ea5e9;--danger: #dc2626}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:15px}a{color:var(--accent);text-decoration:none}.shell{display:flex;min-height:100vh}.sidebar{width:220px;flex:0 0 220px;background:#0f172a;color:#cbd5e1;padding:18px 14px;display:flex;flex-direction:column;gap:4px}.sidebar .brand{color:#fff;font-weight:700;font-size:17px;margin-bottom:4px}.sidebar .brand small{display:block;font-weight:400;color:#7dd3fc;font-size:11px;letter-spacing:.08em;text-transform:uppercase}.sidebar a{display:block;padding:9px 11px;border-radius:8px;color:#cbd5e1;font-size:14px}.sidebar a:hover{background:#1e293b;color:#fff}.sidebar a.active{background:var(--accent);color:#fff}.sidebar 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