driver.css

.topnav {
  background-color: #333;
  overflow:hidden;
}

.topnav a{
  float:left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color:#ccc;
  color:black;
}

.topnav a.active{
  background-color: #00ace6;
  color:white;
}

body{
  background-color: #007399;
}

.grid-container{
  display: grid;
  grid-template-columns: 250px 250px 250px 250px 250px;
  grid-template-rows: 250px 250px;
  grid-gap: 10px;
  padding: 10px;
}

table, th, td {
    border: 1px solid black;
    background-color: #f2f2f2;
}

.grid-container > div{
  background-color: rgba(255, 255, 255, 0.8);
  border: 1px solid black;
  text-align: center;
  font-size: 30px;
}

img{
  width: 70%;
  height: 70%;
  padding: 10px;
}

#smaller {
  width: 60%;
  height: 60%;
}