body {
  margin: 0;
  padding: 0;
  font-size: 1.2rem;
  text-align: center;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
header {
  padding: 10px 25px;
  background-color: rgb(170, 125, 83);
  color: white;
  margin-bottom: 30px;
}
main {
  margin-bottom: 40px;
}
.instructions-text{
  font-size: 1.5rem;
}
.image-eukaryote{
  width: 100%;
  max-width: 750px;
}
.switch-button{
  -webkit-border-radius: 28;
  -moz-border-radius: 28;
  border-radius: 28px;
  font-family: Arial;
  color: #ffffff;
  font-size: 24px;
  background: #de3e16;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
}

.switch-button:hover{
  background: #de3e15;
  background-image: -webkit-linear-gradient(top, #4e0804, #ff3700);
  background-image: -moz-linear-gradient(top, #4e0804,#ff3700);
  background-image: -ms-linear-gradient(top, #4e0804, #ff3700);
  background-image: -o-linear-gradient(top,#4e0804, #ff3700);
  background-image: linear-gradient(to bottom, #4e0804, #ff3700);
  text-decoration: none;
}
footer{
  background-color: rgb(170, 125, 83);
  padding: 15px 30px;
  border-top: 1px solid rgb(170, 125, 83);
}
.num-counter{
  padding: 5px 10px;
  background-color: rgb(196, 138, 67);
  color: white;
  font-weight: bold;
}