:root { color-scheme: light dark; font: 18px/1.6 system-ui, sans-serif; }
body { max-width: 52rem; margin: auto; padding: 1.25rem; overflow-wrap: anywhere; }
nav { display: flex; flex-wrap: wrap; gap: 1rem; margin-block: 1rem; }
button { font: inherit; cursor: pointer; padding: .35rem .8rem; }
img, video, audio { max-width: 100%; height: auto; }
pre { overflow-x: auto; }
article, li { margin-block: 1rem; }
#notice { min-height: 1.6em; }
#session { margin-block: 1rem; }