.tab {
  overflow: hidden;
  border-bottom: 1px solid #3572EF;
  background-color: #FFF;
}
.tab button {
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
  font-size: 17px;
}
.tab button:hover {
  background-color: #A7E6FF;
}
.tab button.active {
  background-color: #3572EF;
  color: #FFFFFF;
}
.tabcontent {
  display: none;
  padding: 20px;
  border-top: none;
}