:root{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-danger: #dc2626;--color-success: #16a34a;--color-warning: #d97706;--color-bg: #f8fafc;--color-surface: #ffffff;--color-text: #0f172a;--color-text-secondary: #64748b;--color-border: #e2e8f0;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--font-size-sm: .875rem;--font-size-md: 1rem;--font-size-lg: 1.25rem;--font-size-xl: 1.5rem}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans SC,sans-serif;color:var(--color-text);background:var(--color-bg);line-height:1.6}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@keyframes spin{to{transform:rotate(360deg)}}