body {
     background-color: lightskyblue
 }


 #mainTitle {
 color: darkslateblue;
 text-align: center;
 background-color:dodgerblue;
 font-family: "Arial";
 font-size: 30px;
 margin: 20px 200px;
 padding: 15px
 }
 p {
   text-align: center;
 }

 .blue {
     color: darkslateblue;
     background-color: deepskyblue;
     text-align: center;
     font-family: "Times New Roman";
     font-size: 15px;

 }
 .pink{
   color: purple;
   background-color: lightpink;
   text-align: center;
   font-family: "Times New Roman";
   font-size: 15px;
   }

 .center {
     display: block;
     margin-left: auto;
     margin-right: auto;
     width: 50%;
 }

 mark {background: lightcoral!important}

 a:link {

     color: purple;
     text-decoration: none;
     text-align: center;
     font-family: "Times New Roman";
     font-size: 15px;
 }

 a:visited {

     color: green;
     text-decoration: none;
     font-family: "Times New Roman";
     font-size: 15px;
 }

 a:hover {

     color: red;
     text-decoration: wavy;
     font-family: "Times New Roman";
     font-size: 15px;
 }

 a:active {

     color: red;
     text-decoration: none;
     font-family: "Times New Roman";
     font-size: 15px;
 }

 ul {
     list-style-type: disc;
 }
 
 .centerimage {
   
   text-align: center;
   margin: auto;
 }