:root{--color-bg: #FFFFFF;--color-bg-elevated: #F8FAFC;--color-text-primary: #0F172A;--color-text-secondary: #475569;--color-text-tertiary: #94A3B8;--color-border: #E2E8F0;--color-brand: #1A4D8F;--color-brand-hover: #163E73;--color-error: #DC2626;--color-success: #16A34A;--color-warning: #D97706;--font-sans: "Source Han Sans SC", "Noto Sans SC", -apple-system, system-ui, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-7: 32px;--space-8: 48px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow-md: 0 4px 12px rgba(15, 23, 42, .08);--z-modal: 1000;--z-toast: 1100;--z-tooltip: 1200}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;height:100%}body{font-family:var(--font-sans);font-size:14px;line-height:1.5;color:var(--color-text-primary);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}#root{min-height:100%}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--color-text-tertiary)}::selection{background:var(--color-brand);color:var(--color-bg)}a{color:var(--color-brand);text-decoration:none}a:hover{color:var(--color-brand-hover);text-decoration:underline}code,pre,kbd,samp{font-family:var(--font-mono)}button{font-family:inherit;font-size:inherit;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.6}