:root{--primary: #2563eb;--primary-dark: #1d4ed8;--success: #16a34a;--danger: #dc2626;--warning: #d97706;--info: #0891b2;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-400: #9ca3af;--gray-600: #4b5563;--gray-900: #111827;--white: #ffffff;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--gray-900);background:var(--gray-100);font-size:14px;line-height:1.5}.layout{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding:24px;max-width:1100px;margin:0 auto;width:100%}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.page-header h2{font-size:22px;font-weight:600}.navbar{background:var(--white);border-bottom:1px solid var(--gray-200);padding:0 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