body { font-family: sans-serif; margin: 2rem; max-width: 50rem; }
h1 { font-size: 1.4rem; }
.ok { color: #0a6b2d; }
.bad { color: #b00020; font-weight: bold; }
pre { background: #f4f4f4; padding: 1rem; overflow-x: auto; }