*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-primary: #1a56db;--color-primary-dark: #1343b0;--color-danger: #e02424;--color-success: #057a55;--color-warning: #c27803;--color-warning-bg: #fdf6b2;--color-gray-50: #f9fafb;--color-gray-100: #f3f4f6;--color-gray-200: #e5e7eb;--color-gray-400: #9ca3af;--color-gray-600: #4b5563;--color-gray-800: #1f2937;--radius: 6px;--shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-gray-50);color:var(--color-gray-800);line-height:1.5}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.layout{display:flex;min-height:100vh}.sidebar{width:220px;background:#1e293b;color:#cbd5e1;display:flex;flex-direction:column;flex-shrink:0}.sidebar-logo{padding:20px 16px 12px;font-size:1rem;font-weight:700;color:#fff;border-bottom:1px solid #334155}.sidebar-logo 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