button
{
  height:auto;
  width:auto;
  border-radius:10px;
  padding:5px;
  font-size:20px;
  font-family: 'Oswald', sans-serif;
  cursor:pointer;
  background-color:white;
}

div.ex1{
	padding-top:10px;
	padding-left:10px;
}

p.s1{
	font-size:40px;
}
p.s2{
	font-size:22px;
}
p.s3{
	font-size:30px;
}
p.s4{
	font-size:13px;
}

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 140px;
  background-color: #555;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px;
  position: absolute;
  z-index: 1;
  bottom: 150%;
  left: 50%;
  margin-left: -75px;
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip .tooltiptext::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: #555 transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}