body {
  background-color: deepskyblue;
  font-family: 'Sofia', sans-serif;
  color: navy;
  margin-top: 10px;
  margin-bottom: 10px;
  margin-right: 150px;
  margin-left: 150px;
}
td {
  padding: 4px;
}
@media screen and (max-width: 800px) {
  body {
    font-size: 30px;
    margin-top: 10px;
  margin-bottom: 10px;
  margin-right: 50px;
  margin-left: 50px;
  }
}
header {
  text-align: center;
  font-size: 24px;
}

ul {
  list-style-type: none;
}

li {
  display: inline;
  padding: 10px;
}

table, th, td {
  border: 2px solid navy;
}

.mainnav {
  background-color: rgb(94, 174, 255);
  color: navy;
  border-radius: 5px;
  border-style: double;
  text-align: center;
}

.section1 {
  background-color: rgb(94, 174, 255);
  color: navy;
  padding: 10px;
  border-radius: 4px;
  border-style: solid;
  margin-top: 10px;
}

.section2 {
  background-color: rgb(94, 174, 255);
  color: navy;
  padding: 10px;
  border-radius: 4px;
  border-style: solid;
  margin-top: 10px;
}

.section3 {
  background-color: rgb(94, 174, 255);
  color: navy;
  padding: 10px;
  border-radius: 4px;
  border-style: solid;
  margin-top: 10px;
}
a {
  color: navy;
}
a:visited {
color: purple;
}
a:hover {
color: blue;
}