.button1 {
  display: inline-block;
  border-radius: 6px;
  background: -moz-linear-gradient(#061260,#8c88ea);
  background: -o-linear-gradient(#061260,#8c88ea);
  background: -webkit-linear-gradient(#061260,#8c88ea);
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 18px;
  padding: 12px;
  width: 500px;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
}

.button1 span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.5s;
}

.button1 span:after {
  content: '\00bb';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.5s;
}

.button1:hover span {
  padding-right: 25px;
}

.button1:hover span:after {
  opacity: 1;
  right: 0;
}

div.panel {
    padding: 0 18px;
    background-color: white;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
}