.sky-btn {
  color: #333333;
  border-color: white;
  background-color: Transparent;
  background-repeat: no-repeat;
  border-style: none;
  cursor: pointer;
  overflow: hidden;
  outline: none;
}

.sky-btn:active {
  color: #cccccc;
}

.sky-btn-small {
  width: 30px;
  height: 25px;
}

.sky-btn-wide {
  width: 60px;
  height: 20px;
}

.sky-btn-big {
  width: 100px;
  height: 60px;
}