body {
  background-color: #1e1e1e;
  color: #d4d4d4;
  font-family: Consolas, monospace;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 800px;
  margin: auto;
}

.diagnostic-box {
  background: #2e2e2e;
  padding: 15px;
  border: 1px solid #444;
  border-radius: 8px;
}