:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #dbeafe;--success: #16a34a;--success-light: #dcfce7;--warning: #d97706;--warning-light: #fef3c7;--danger: #dc2626;--danger-light: #fee2e2;--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;--sidebar-width: 250px;--sidebar-collapsed: 60px;--topbar-height: 56px;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px rgba(0, 0, 0, .1);font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5;color:var(--gray-900);background-color:var(--gray-50)}*{box-sizing:border-box;margin:0;padding:0}body{margin:0;min-height:100vh}#root{min-height:100vh}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--gray-900);color:#fff;display:flex;flex-direction:column;transition:width 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var(--gray-100)}.activity-item:last-child{border-bottom:none}.activity-icon{width:32px;height:32px;min-width:32px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center}.activity-content{flex:1;min-width:0}.activity-description{font-size:14px;color:var(--gray-700);margin-bottom:2px;line-height:1.4}.activity-time{font-size:12px;color:var(--gray-400)}.quick-links{display:flex;flex-direction:column;gap:4px}.quick-link-item{display:flex;align-items:center;gap:12px;padding:12px;border:none;background:none;border-radius:var(--radius);cursor:pointer;width:100%;text-align:left;transition:background 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