html,
body {
  margin: 0;
  padding: 0;
  font-family: "Tahoma";
}
h1,
h2,
h3,
h4,
h5,
h6,
ul,
li,
span,
p,
div,
a {
  margin: 0;
  padding: 0;
  font-size: 14px;
  font-weight: normal;
  list-style: none;
  text-decoration: none;
  font-family: "Tahoma";
}
.btn {
  display: block;
  padding: 10px 20px;
  cursor: pointer;
  color: #fff;
  background-color: #8e44ad;
  border-radius: 3px;
  width: 80px;
  margin: 20px auto;
}