<style>
.btn {
  background: #3498db;
  background-image: -webkit-linear-gradient(top, #3498db, #2980b9);
  background-image: -moz-linear-gradient(top, #3498db, #2980b9);
  background-image: -ms-linear-gradient(top, #3498db, #2980b9);
  background-image: -o-linear-gradient(top, #3498db, #2980b9);
  background-image: linear-gradient(to bottom, #3498db, #2980b9);
  font-family: Arial;
  color: #ffffff !important;
  font-size: 20px;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
  width: 200px !important;
  display: block;
}

.btn:hover {
  background: #3cb0fd;
  background-image: -webkit-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -moz-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -ms-linear-gradient(top, #3cb0fd, #3498db);
  background-image: -o-linear-gradient(top, #3cb0fd, #3498db);
  background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
  text-decoration: none;
}

</style>

<!-- Codi dels botons -->

<a class="btn" href="http://enllaç1">Botó 1</a>

<a class="btn" href="http://enllaç2">Botó 2</a>

<a class="btn" href="http://enllaç3">Botó 3</a>

<a class="btn" href="http://enllaç4">Botó 4</a>

<a class="btn" href="http://enllaç5">Botó 5</a>