body { font-family: sans-serif; max-width: 900px; margin: 2em auto; padding: 0 1em; }
nav { border-bottom: 1px solid #ccc; padding-bottom: 0.5em; }
textarea { width: 100%; }
#answer { margin-top: 1em; padding: 1em; background: #f4f4f4; }
#citations { margin-top: 1em; }
.citation { border-left: 3px solid #888; padding-left: 0.5em; margin: 0.5em 0; }
table { width: 100%; border-collapse: collapse; margin-top: 1em; }
th, td { border: 1px solid #ddd; padding: 0.5em; text-align: left; }