body { font-family: sans-serif; max-width:800px; margin:2rem auto; }
form, ul { margin:1rem 0; }
input, select, button { padding:0.5rem; margin:0.25rem; }
li { background:#f9f9f9;padding:0.5rem;margin:0.25rem 0;border-radius:4px; }
button { cursor:pointer; }