body {
 background-color:#b7d7f3 ;   
}

h1 {
    background-color: #4682b4;
    font-size: 2em;
    margin-top: 50px;
    text-align: center;
    height: 100px;
    
}

nav{
    background-color: #4682b4;
    text-align: center;
    height: 50px;
}

.item2 { grid-area: menu;  width: 400px; height: 550px;}
.item3 { grid-area: main; width: 400px; height: 550px; }
.item4 { grid-area: right; width: 400px; height: 550px;}
.item5 { grid-area: left; background-color: #4682b4; padding-left: 450px; padding-right: 450px;}

  .grid-container {
    display: grid;
    grid-template-areas:
      'header header header header header header'
      'menu main main main right right'
      'menu footer footer footer footer footer';
    gap: -30px;
    background-color: #ffffff;
    padding: 10px;
    width: 1750px;
    padding-left: 100px;
  }

.grid-container > div {
  background-color: #4682b4;
  text-align: center;
  padding: 20px 0;
  font-size: 30px;
}

td, th {
  border: 1px solid #dddd;
  text-align: left;
  padding: 8px;
}

.div {
  width: 650px;
  
}