body { margin: 0; font: 15px/1.4 system-ui, sans-serif; display: flex; flex-direction: column; height: 100vh; }
header { display: flex; gap: 8px; padding: 8px; align-items: center; border-bottom: 1px solid #ddd; }
#sessions { padding: 8px; max-height: 30vh; overflow: auto; }
#session-list { list-style: none; margin: 8px 0 0; padding: 0; }
#session-list li { padding: 6px; border-bottom: 1px solid #eee; }
#output { flex: 1; padding: 8px; white-space: pre-wrap; overflow: auto; }
footer { display: flex; gap: 8px; padding: 8px; border-top: 1px solid #ddd; }
#prompt-input { flex: 1; min-height: 44px; }