body {
  font-family: Arial, Helvetica, sans-serif;
}

p {
  width: 70%;
  margin-left: auto;
  margin-right: auto;
  padding: 0; 
  text-align: justify;
}

div.centered {
  width: 70%;
  margin-left: auto;
  margin-right: auto;
  padding: 0;
}

div.java {        
  display: inline-block;
  margin-left: auto;
  margin-right: auto;
  padding: 0; 
  overflow: auto;
  border: solid gray;
  border-width: .1em .1em .1em .8em;
  padding: .2em .6em;
} 

span.code {
  font-family: "Courier New", Courier, monospace;
}

p.img {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
} 

img.math {
  vertical-align: middle;
}

h1 {
  width: 70%;
  margin-left: auto;
  margin-right: auto;
}

h2 {
  width: 70%;
  margin-left: auto;
  margin-right: auto;
}

table.table1 {  
  margin-left: 15%;  
  margin-right: 15%;  
  background-color: transparent;
  border-collapse: collapse;        
}

table.table1 th, table.table1 td {
  text-align: center;
  border: 1px solid black;
  padding: 5px;
  
}

table.table1 th {
  background-color: AntiqueWhite;
}