* {
  padding: 0;
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background-color: mediumaquamarine;
}

nav {
  background-color: white;
}

ul {
  list-style-type: none;
  display: flex;
  justify-content: space-around;
}

li {
  padding: 10px;
}

li:hover {
  background-color: tomato;
  color: white;
}

.header {
  grid-area: h;
}
.menu {
  grid-area: n;
}
.main {
  grid-area: m;
}
.right {
  grid-area: r;
}
.footer {
  grid-area: f;
}

.container {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: 10vh 80vh 10vh;
  grid-template-areas:
    "h h h h h h"
    "n m m m m r"
    "f f f f f f";

  background-color: #2196f3;
  padding: 5px;
}

.container > div {
  background-color: rgba(255, 255, 255, 0.8);
  text-align: center;
  padding: 2px;
  margin: 2px;
  font-size: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}