.artifact-zone {
  border-color: #a9c9f4;
  background: linear-gradient(135deg, #f5f9ff, #fff);
}
.artifact-zone h2 { margin: 4px 0; }
.artifact-zone p, .process-files > p { color: #536174; }
.process-files > summary {
  cursor: pointer;
  font-size: 17px;
  font-weight: 700;
}