body {
  margin: 0;
  font-family: 'Georgia', serif;
  background: linear-gradient(to bottom right, violet, royalblue);
  color: black;
  padding: 20px;
  text-align: center;
}
nav a {
  margin: 0 15px;
  color: black;
  text-decoration: none;
  font-weight: bold;
}
.main-image {
  width: 60%;
  border-radius: 10px;
  box-shadow: 0 0 15px white;
}
.small-image {
  width: 40%;
  border-radius: 8px;
  margin-top: 20px;
}
button
{
  display: inline-block;
  background-color: #7b38d8;
  border-radius: 10px;
  border: 2px double #cccccc;
  color: #eeeeee;
  text-align: center;
  font-size: 20px;
  padding: 20px;
  width:230px;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -o-transition: all 0.5s;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
}
button:hover {
  background-color: green;
}