:root{--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-2xl:48px;--space-3xl:64px;--content-max-width:720px;--touch-target-min:44px;--text-body:16px;--text-label:14px;--text-heading:20px;--text-display:28px;--text-meta:13px;--weight-regular:400;--weight-semibold:600;--line-body:1.5;--line-label:1.4;--line-heading:1.2;--font-system:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono:ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;--color-dominant:#fff;--color-secondary:#f4f5f7;--color-divider:#e4e6eb;--color-accent:#2563eb;--color-destructive:#dc2626;--color-success:#16a34a;--color-warning:#d97706;--color-text-primary:#111827;--color-text-muted:#6b7280;--color-border:#d1d5db}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-system);font-size:var(--text-body);font-weight:var(--weight-regular);line-height:var(--line-body);color:var(--color-text-primary);background:var(--color-dominant)}a{color:var(--color-accent)}:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}