body { max-width: 52rem; margin: 2rem auto; padding: 0 1rem; font: 1.1rem/1.6 system-ui, sans-serif; color: #172535; background: #fff; }
nav { display: flex; gap: 1rem; }
a { color: #1757a6; }
img { max-width: 100%; height: auto; }
pre { overflow: auto; padding: 1rem; background: #f1f4f7; }