.f, .f:hover, f:active {
  display: inline-block;
  box-sizing: content-box;
  cursor: pointer;
  padding: 0px 4px 0px 10px;
  border: none;
  border-radius: 4px;
  font: normal normal bold 22px/normal Arial, Helvetica, sans-serif;
  color: rgba(255,255,255, 1.0);
  background: #48649f;
  text-decoration: none;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}