[class^=cong-] {
  overflow: hidden;
  white-space: nowrap;
  width: 100%;
  height: 40px;
  max-width: 100%;
  font-size: 2rem;
  padding: 10px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  text-transform: uppercase;
  border: 1px solid currentColor;
}

.cong-btn {
  position: relative;
  color: rgb(61.2, 76.5, 39.95);
  border-radius: 8px;
  cursor: pointer;
  z-index: 1;
}
.cong-btn:before, .cong-btn:after {
  position: absolute;
  top: 50%;
  content: "";
  width: 20px;
  height: 20px;
  background-color: rgb(27, 45, 2);
  border-radius: 50%;
}
.cong-btn:before {
  left: -20px;
  transform: translate(-50%, -50%);
  z-index: -1;
}
.cong-btn:after {
  right: -20px;
  transform: translate(50%, -50%);
  z-index: -1;
}
.cong-btn:hover, .cong-btn:focus {
  color: rgb(198, 202.5, 191.75);
}
.cong-btn:hover:before, .cong-btn:focus:before {
  animation: criss-cross-left 0.8s both;
  animation-direction: alternate;
}
.cong-btn:hover:after, .cong-btn:focus:after {
  animation: criss-cross-right 0.8s both;
  animation-direction: alternate;
}
.cong-btn.free {
  font-size: 1.6rem;
  color: #ffffff;
  border: 1px solid;
  padding: 5px 10px;
  background: #039be5;
}

@keyframes criss-cross-left {
  0% {
    left: -20px;
  }
  50% {
    left: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    left: 50%;
    width: 150%;
    height: 150%;
  }
}
@keyframes criss-cross-right {
  0% {
    right: -20px;
  }
  50% {
    right: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    right: 50%;
    width: 150%;
    height: 150%;
  }
}
.login-box:has(.kakao-btn) {
  border: unset;
}

.kakao-btn {
  background: #fae100;
  padding: 10px !important;
  height: 50px;
  width: 150px;
  border-radius: 18px;
  cursor: pointer;
}

.kakao-btn {
  padding: 1em 1.5em;
  border-radius: 4px;
  cursor: pointer;
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  border: none;
  color: #ffffff;
}
.kakao-btn.button-first {
  background: linear-gradient(to right, #e55d87, #5fc3e4);
  box-shadow: 0 2px 25px rgba(229, 93, 135, 0.5);
}
.kakao-btn.button-first:active {
  background: linear-gradient(to right, rgba(229, 93, 135, 0.9), rgba(95, 195, 228, 0.9));
}
.kakao-btn.circle {
  background: linear-gradient(to right, #1488cc, #2b32b2);
  box-shadow: 0 2px 25px rgba(20, 137, 204, 0.5);
}
.kakao-btn .circle:active {
  background: linear-gradient(to right, rgba(20, 136, 204, 0.9), rgba(43, 50, 178, 0.9));
}
.kakao-btn:focus {
  outline: none;
}

particle {
  left: 0;
  top: 0;
  pointer-events: none;
  position: fixed;
  opacity: 0;
}