body {
  background-color: yellow;
  color: green;
}

.ibm-plex-mono-medium {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 500;
  font-style: normal;
}

.Carlos_end {
    display: block;
  margin: auto;
  width: 1000px;
}

.szczur {
    display: block;
  margin: auto;
  width: 250px;
}