.kuru_link {
  display: inline-block;
  min-width: 130px;
  text-align: center;
  background-color: #009999;
  font-size: 18px;
  color: #ffffff;
  text-decoration: none;
  padding: 2px 10px 2px 10px;
  position: relative;
  transition: .9s;
  border: 1px solid #FFF;
}

.kuru_link span {
  display: block;
  position: absolute;
  background-color: #48d1cc;
  top: 0;
  left: 0;
  width: 100%;
  height: 32px;
  font-size: 14px;
  color: #2f4f4f;
  line-height: 32px;
  z-index: -1;
  transition: .3s;
}

.kuru_link:hover {
  text-decoration: none;
}

.kuru_link:hover span {
  transform: translateY(40px);
}