:root { font: 16px/1.5 system-ui, sans-serif; color: #202124; background: #f6f7f8; }
main { max-width: 650px; margin: 3rem auto; padding: 1.5rem; background: white; border: 1px solid #ddd; }
h1 { font-size: 1.5rem; margin-top: 0; }
form { display: grid; gap: .6rem; }
input, select, button { font: inherit; padding: .5rem; }
button { cursor: pointer; }
:disabled { cursor: default; opacity: .6; }
progress { width: 100%; }
pre { white-space: pre-wrap; overflow-wrap: anywhere; font-size: .8rem; background: #f6f7f8; padding: .8rem; }
ul { padding-left: 1.3rem; }
[hidden] { display: none !important; }