a.sd:link, a.sd:visited {
  background-color: #0066FF;
  border-radius: 50px;
  background: linear-gradient(to top, #000000 0%, #0000cc 100%);
  color: #fff;
  border: solid 1px;
  padding: 7px 0px;
  margin: 3px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-family:arial;
  font-size: 20px;
  font-weight: bold;
  width:130px;
}

a.sds:link, a.sds:visited {
  background-color: #0066FF;
  border-radius: 50px;
  background: linear-gradient(to top, #000000 0%, #0000cc 100%);
  color: #fff;
  border: solid 1px;
  padding: 7px 0px;
  margin: 3px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-family:arial;
  font-size: 20px;
  font-weight: bold;
  width:250px;
}

a.sk:link, a.sk:visited {
  background-color: #0066FF;
  border-radius: 50px;
  background: linear-gradient(to top, #000000 0%, #ff0000 100%);
  color: #fff;
  border: solid 1px;
  padding: 7px 0px;
  margin: 3px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-family:arial;
  font-size: 20px;
  font-weight: bold;
  width:130px;
}

a.sd:hover, a.sd:active {
  background-color: red;
  color: #ffff00;
  background: linear-gradient(to bottom, #006600 0%, #003300 100%);
}