body {background-color: lightblue;}

body { display: grid;
grid-template-columns: 100px auto 100px;
grid-template-rows: 80px calc(100% - 310px) 150px 80px ;
grid-gap:10px; }
figure { grid-column: 1; grid-row: 1; }
header { grid-column: 2/4; grid-row: 1; }
nav { grid-column: 1; grid-row: 2/4;
    background-color: lightred;
    }
main { grid-column: 2; grid-row: 2; 
      background-color: blue;
      }
aside { grid-column: 3; grid-row: 2/4;}
article { grid-column: 2; grid-row: 3; 
        background-color: yellow;
        }
footer { grid-column: 1/4; grid-row: 4; 
background-color: white;}