a.btn-default {
  display: inline-block;
  background: #1dc19c;
  color: #ffffff;
  border: 2px solid #1dc19c;
  border-radius: 4px;
  box-shadow: 0 0 0 1px #ffffff inset;
  width: 100%;
  max-width: 100%;
  font-size: 100%;
  line-height: 1.9;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  padding: 1em;
  transition: all 0.6s;
}
a.btn-default:visited {
  background: #1dc19c;
  color: #ffffff;
  border: 2px solid #1dc19c;
  text-decoration: none;
}
a.btn-default:active {
  background: #1dc19c;
  color: #1dc19c;
  border: 2px solid #1dc19c;
  text-decoration: none;
}
a.btn-default:hover {
  background: #1dc19c;
  box-shadow: 0 0 0 300px #ffffff inset;
  border-color: #1dc19c;
  color: #1dc19c;
  text-decoration: none;
  opacity: 1;
}