body
{
   background-color:black;
   color: white;
}

div.red 
{
  background-color: red;
}

.hai{ 
  background-color: orange;
  margin-right: 60% ;
}

#haii{
  background-color: violet;
}

li:hover{
  color: blueviolet;
  
}

div.hello{
  background-color: violet;
  border-radius: 28px ;
  border: 10px solid green;
  padding: 30px;
  margin-left: 100px;
  margin-right: 60%;
  margin-top: 20px ;
  margin-bottom: 30px ;

}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: auto;
}

th {
  text-align: left;
}