html, body {
  height: 100%;
  width: 100%;
  font-family:"calibri";
}
table, th, td {
  text-align: center;
  border: 1px solid black;
}
h1 {
  text-align: center;
  font-size: 50px;
}
header, nav, main, aside, footer {
  text-align: center;
  border: 5px solid;
  padding: 10px;
  margin: 2px;
}
header {
  background-color: red;
  border-color: black;
  color: black;
  grid-area: head;
  text-align: center;
}
nav {
  text-align: center;
  background-color: red;
  border-color: black;
  grid-area: nav;
}
  a {color: black;
  text-decoration: underline;
}
main {
  background-color: #FFFFFF;
  text-align: center;
  border-color: black;
  grid-area: main;
}
aside {
  background-color: red;
  border-color: black;
  grid-area: aside;
  text-align: center;
}
footer {
  text-align: center;
  background-color:white;
  border-color: black;
  grid-area: foot;
}