body { font-family: system-ui, sans-serif; line-height: 1.5; margin: 0; }
main { max-width: 36rem; margin: 0 auto; padding: 2rem 1rem; }
button { font: inherit; padding: 0.6rem 1rem; cursor: pointer; }
pre { white-space: pre-wrap; word-break: break-all; }
.note { font-size: 0.9rem; }