:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
main { max-width: 30rem; margin: 4rem auto; padding: 0 1rem; line-height: 1.5; }
ul { list-style: none; padding: 0; }
li { margin: .5rem 0; }
.flash .alert { color: crimson; }
button { font: inherit; padding: .5rem .75rem; }