*:before,
*:after {
  z-index: -1;
}


a {
  text-decoration: none;
  line-height: 50px;
  color: black;
  font-weight: bold;
  font-family: NanumGothic;
  text-align: center;
}

.centerer {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 800px) {
  .wrap {
    width: 33%;
    float: left;
  }
}
[class^=btn-] {
  position: relative;
  display: block;
  overflow: hidden;
  width: 180px;
  height: 50px;
  margin: 2px auto;
  text-transform: uppercase;
  border: 1px solid currentColor;
}

.btn-11 {
  position: relative;
  color: #548235;
}
.btn-11:before, .btn-11:after {
  position: absolute;
  top: 50%;
  content: "";
  width: 20px;
  height: 20px;
  background-color: #548235;
  border-radius: 50%;
}
.btn-11:before {
  left: -20px;
  transform: translate(-50%, -50%);
}
.btn-11:after {
  right: -20px;
  transform: translate(50%, -50%);
}
.btn-11:hover {
  color: #d4e6c7;
}
.btn-11:hover:before {
  -webkit-animation: criss-cross-left 0.8s both;
          animation: criss-cross-left 0.8s both;
  -webkit-animation-direction: alternate;
          animation-direction: alternate;
}
.btn-11:hover:after {
  -webkit-animation: criss-cross-right 0.8s both;
          animation: criss-cross-right 0.8s both;
  -webkit-animation-direction: alternate;
          animation-direction: alternate;
}

@-webkit-keyframes criss-cross-left {
  0% {
    left: -20px;
  }
  50% {
    left: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    left: 50%;
    width: 375px;
    height: 375px;
  }
}

@keyframes criss-cross-left {
  0% {
    left: -20px;
  }
  50% {
    left: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    left: 50%;
    width: 375px;
    height: 375px;
  }
}

@-webkit-keyframes criss-cross-right {
  0% {
    right: -20px;
  }
  50% {
    right: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    right: 50%;
    width: 375px;
    height: 375px;
  }
}
@keyframes criss-cross-right {
  0% {
    right: -20px;
  }
  50% {
    right: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    right: 50%;
    width: 375px;
    height: 375px;
  }
}