nav {
  background-color: rgb(255, 255, 255) ;
  width: 60%;
  height: 150px;
  margin-left: 20%;
  margin-top: 5%;

}

/* navigation bar from https://www.dtwf.club/css_navbar_horizontal.asp */

ul {
  list-style-type: none;
  }
  
  li {
     float: left;
     }
     
     li a{
     display: block;
     color: black;
     text-align: center;
     font-size: 25px;
     text-align: center;
     text-decoration: none;
     padding-top: 5px;
     padding-left: 40px;
     }
    li a:hover {
    background-color: white; /*change text colour on hover*/
    }
    
    /* end of havbar */
   
    *{

   box-sizing: border-box;
}

body {
font-family: Arial, Helvetica, sans-serif; background-color: black;


}

  /* Style the header */
  header {
padding: 30px;
text-align: center;
font-size: 35px;
color: rgb(0, 0, 0);
}
 
  main{
  
      
      width: 100%;
      height: 1000px;
      border: 1px aqua;
  }
  

  footer{
    background-color: grey;
    width: 100%;
    height: 120px;
  
  }

.boxm{
text-align: center;
background-color: DodgerBlue;
width: 60%;
height: 400px;
margin-left: 20%;
float: left;

}


.boxright{
text-align: center;
background-color: Dodgerblue;
width: 50%;
float: left;
height: 200px;
}



.boxleft {
text-align: center;
background-color: Dodgerblue;
width: 50%;
float: left;
height: 200px;
/*margin-left: 20%;*/

}

.boxp{
  text-align: center;
  background-color: rgb(0, 0, 0);
  width: 60%;
  height: 400px;
  margin-left: 20%;
  float: left;

}

.boxleft2 {
  text-align: center;
  background-color: rgb(0, 0, 0);
  width: 50%;
  float: left;
  height: 200px;
  
  
  }

  .boxright2{
    text-align: center;
    background-color: rgb(0, 0, 0);
    width: 50%;
    float: left;
    height: 200px;
    }