body {
  margin: 0;
  padding: 0;
  font-family: 'Helvetica Neue', sans-serif;
  background: #111;
  color: #fff;
}
.container {
  max-width: 800px;
  margin: auto;
  padding: 2rem;
}
#fileInput, #searchInput {
  width: 100%;
  padding: 0.5rem;
  margin-bottom: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  border-radius: 4px;
}
#chatBox {
  margin-top: 1rem;
  background: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 6px;
  white-space: pre-wrap;
}
.highlight {
  background-color: yellow;
  color: #000;
}