:root{--fondo:#fff;--texto:#16181d;--tenue:#6b7280;--borde:#e5e7eb;--acento:#1d4ed8;--ok:#15803d;--fallo:#b91c1c}@media (prefers-color-scheme:dark){:root{--fondo:#0f1115;--texto:#e8eaed;--tenue:#9aa1ac;--borde:#262b33;--acento:#7aa2ff;--ok:#4ade80;--fallo:#f87171}}*{box-sizing:border-box}body{background:var(--fondo);color:var(--texto);margin:0;padding:2.5rem 1.5rem;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.6}main{max-width:46rem;margin:0 auto}