body, html {
  height: 100%;
  margin: 0;
  font-family: Arial;
}

.tablink {
  background-color: #555;
  color: white;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  font-size: 17px;
  width: 20%;
}

.tablink:hover {
  background-color: #777;
}

.tabcontent {
  color: black;
  display: none;
  padding: 100px 20px;
  height: 100%;
  text-align: center;
}