body {
  background-color: white;
  font-family: Arial;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  background-color: #5B9FC5;
  color: white;
  height: 50px;
  width: 100%;
}

header img {
  height: 100%;
}

.logo {
  float: left;
  height: 100%;
}

nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: 50%;
}

nav a {
  color: white;
  text-decoration: none;
  width: 100%;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

nav a:hover, nav a:focus {
  background-color: #286a8f;
}

main .home {
  display: grid;
  grid-template-rows: repeat(4, 1fr);
  height: 100vh;
}