:root{--color-bg: #f4f5f7;--color-surface: #ffffff;--color-primary: #4f46e5;--color-primary-hover: #4338ca;--color-primary-light: #eef2ff;--color-success: #16a34a;--color-success-light: #dcfce7;--color-danger: #dc2626;--color-danger-light: #fee2e2;--color-warning: #d97706;--color-warning-light: #fef3c7;--color-text: #1f2937;--color-text-muted: #6b7280;--color-border: #e5e7eb;--radius: 10px;--shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 8px 24px rgba(0,0,0,.1);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}body{margin:0;font-family:var(--font);background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased}h1,h2,h3{margin:0 0 4px}p{margin:4px 0}.app-shell{display:flex;min-height:100vh}.sidebar{width:240px;flex-shrink:0;background:var(--color-surface);border-right:1px solid var(--color-border);padding:20px 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