:root{--blue-50:#eff6ff;--blue-100:#dbeafe;--blue-500:#3b82f6;--blue-600:#2563eb;--blue-700:#1d4ed8;--blue-800:#1e40af;--blue-900:#1e3a5f;--gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-300:#d1d5db;--gray-400:#9ca3af;--gray-500:#6b7280;--gray-600:#4b5563;--gray-700:#374151;--gray-800:#1f2937;--gray-900:#111827;--green-100:#dcfce7;--green-600:#16a34a;--green-700:#15803d;--red-100:#fee2e2;--red-600:#dc2626;--amber-100:#fef3c7;--amber-600:#d97706;--purple-100:#f3e8ff;--purple-600:#9333ea;--radius:8px;--shadow-sm:0 1px 2px #0000000d;--shadow:0 1px 3px #0000001a, 0 1px 2px #0000000f;--shadow-md:0 4px 6px #00000012, 0 2px 4px #0000000f;color:var(--gray-800);background:var(--gray-50);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.5}*,:before,:after{box-sizing:border-box}body{margin:0}.app-layout{min-height:100vh;display:flex}.sidebar{background:var(--blue-800);color:#fff;z-index:10;flex-direction:column;width:240px;display:flex;position:fixed;top:0;bottom:0}.sidebar-brand{border-bottom:1px solid #ffffff26;padding:20px 16px}.sidebar-logo{border-radius:50%;width:48px;height:48px;margin-bottom:8px}.sidebar-brand h1{letter-spacing:.3px;margin:0;font-size:16px;font-weight:600}.sidebar-brand small{opacity:.7;margin-top:2px;font-size:11px;display:block}.sidebar-nav{flex:1;margin:0;padding:12px 8px;list-style:none}.sidebar-nav a{color:#fffc;border-radius:6px;align-items:center;gap:10px;padding:10px 12px;font-size:14px;text-decoration:none;transition:background .15s;display:flex}.sidebar-nav a:hover{color:#fff;background:#ffffff1a}.sidebar-nav a.active{color:#fff;background:#fff3;font-weight:500}.sidebar-nav 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