:root{--color-bg:#ffffff;--color-text:#1a1a1a;--color-muted:#667085;--color-accent:#1e88ff;--color-border:#e5e7eb;--radius-md:16px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--color-bg);color:var(--color-text);font-family:Segoe UI,Arial,sans-serif}main{width:min(960px,calc(100% - 32px));margin:0 auto;padding:32px 0}