:root{--bg:#f4f7fb;--panel:#fff;--text:#111827;--muted:#6b7280;--primary:#2563eb;--border:#e5e7eb;--danger:#dc2626;--success:#16a34a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Arial,sans-serif}a{text-decoration:none;color:inherit}.app-shell{display:flex;min-height:100vh;position:relative}.sidebar{width:260px;background:#0f172a;color:#e5e7eb;padding:24px;position:fixed;top:0;left:0;bottom:0;z-index:101;transform:translateX(-100%);transition:transform .3s ease;overflow-y:auto}.sidebar.open{transform:translateX(0)}.brand{font-size:24px;font-weight:800;margin-bottom:28px;display:flex;align-items:center;justify-content:space-between}.nav{display:grid;grid-gap:8px;gap:8px}.nav a{padding:12px 14px;border-radius:10px;color:#cbd5e1;font-size:14px;transition:background .15s}.nav a.active,.nav a:hover{background:#1e293b;color:#fff}.nav a.active{font-weight:600}.main{flex:1 1;min-width:0;margin-left:0;transition:margin-left .3s 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