:root{--color-bg:#f5f6f8;--color-surface:#ffffff;--color-border:#e2e5ea;--color-text:#1c2430;--color-text-muted:#5b6472;--color-primary:#2f6fed;--color-primary-hover:#285fd0;--color-primary-contrast:#ffffff;--color-danger:#d64545;--color-danger-bg:#fdecec;--color-success:#2f9e6f;--radius-sm:4px;--radius-md:8px;--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--font-sans:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;--shadow-sm:0 1px 2px rgba(16,24,40,0.06);--shadow-md:0 4px 12px rgba(16,24,40,0.1)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);font-size:14px;line-height:1.5}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{margin:0 0 var(--space-md);font-weight:600}button,input,select,textarea{font-family:inherit;font-size:inherit}