html, body {
  margin: 0;
  padding: 0;
  width: 100%;
}
.head1{
    font-family:'Times New Roman', Times, serif;
    font-size:xx-large;
    color: black;
}

.b1{
    font-family:'Times New Roman', Times, serif;
    font-size:large;
    color: black;
  
}
.full-width-div {
  width: 50vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -20vw;
  margin-right: -20vw;
  background-color: lightskyblue;
  vertical-align: center;
}