body { font: 16px/1.5 system-ui, sans-serif; max-width: 860px; margin: 2rem auto; padding: 0 1rem; color: #1b1f23; }
h1, h2, h3 { line-height: 1.2; }
summary { cursor: pointer; }
details details { margin-left: 1rem; }
code { font-family: ui-monospace, monospace; background: #eee; padding: 0.05em 0.3em; border-radius: 2px; }
small { color: #666; }