:root{color-scheme:light;--text-color:#0f172a;--muted-text:#475569;--surface-color:#ffffff;--border-color:#cbd5e1;--link-color:#1d4ed8;--focus-color:#2563eb;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:#f8fafc;color:var(--text-color)}a{color:var(--link-color)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--focus-color);outline-offset:2px}main{max-width:none;margin:0;padding:0}