main { max-width: 700px; margin: auto; }
.file-group { border: 1px solid #eee; padding: 1em; margin-bottom: 1em; background: #f9f9f9; }
textarea { width: 100%; min-height: 120px; font-family: monospace; }
label { display: block; margin: 0.7em 0 0.2em 0; }
input[type=text] { width: 100%; padding: 0.4em; }
button { margin-top: 1em; }
.files-list { margin-bottom: 1.2em; }