:root{--color-bg:#ffffff;--color-surface:#f4f5f7;--color-text:#16181d;--color-text-muted:#545a66;--color-accent:#2952cc;--color-success:#17723a;--color-danger:#b3261e;--color-border:#d9dce1;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-6:24px;--space-8:32px;--radius-sm:4px;--radius-md:8px;--radius-lg:16px;--font-sans:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--font-mono:ui-monospace,"SF Mono",Menlo,monospace;--text-sm:14px;--text-md:16px;--text-lg:20px;--text-xl:32px;--leading:1.5;--weight-regular:400;--weight-bold:700;--border-width:1px;--content-max:720px}@media (prefers-color-scheme:dark){:root{--color-bg:#111317;--color-surface:#1c1f26;--color-text:#eceef2;--color-text-muted:#a3a9b5;--color-accent:#8fa8ff;--color-success:#5fd38d;--color-danger:#ff8a80;--color-border:#2e323b}}*,:after,:before{box-sizing:border-box}body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);font-size:var(--text-md);line-height:var(--leading)}