body{
     text-align: center;
     background-color: rgba(182, 178, 178, 0.937);
     font-family: 'Times New Roman', Times, serif;
     min-height: 100;
     margin: 0;
}
a:link{
     color:white;
}
header{
     text-align: left;
     background-color: rgb(90, 132, 170);
     margin: 0px;
     font-size: 24px;
     color:azure;
     padding: 20px;;
}
nav{
     float: right;
     padding:20px;
     background-color: gray;
     width: 15%;
     height: 500px;
     margin:0;
     color:white;
}
footer {
  background-color: #777;
  padding: 100px;
  text-align: left;
  color: white;
}
.b{
     text-align: center;
     margin: 0;
}