body {
  background-image: URL(img/zvnet.jpg);
  background-attachment: fixed;
  background-color: "silver"
}
H1 {text-align: center}
H2 {text-align: center}
P {
  text-align: justify; 
  text-indent: 1.25cm;
  margin-left: 0.8cm;
  margin-right: 0.8cm
}
p:first-letter {color:red; font-size:100%}
address {text-align: right; margin-right: 0.8cm}
.codeblock pre {
  left: 128px;
  border: 1px;
}