@import url('https://fonts.googleapis.com/css2?family=Do+Hyeon&display=swap');
body {
  background-color: #F5932A;
  background-color: #A86F32;
  background-color: #7AD4F5;
  background-color: #438DA8;
  background-color: #99E4FF;
  background-color: #eee;
  font-family: 'Do Hyeon', sans-serif;
}

.wrap {
  width: 100%;
  max-width: 500px;
  text-align: center;
  margin: auto;
  margin-top: 5vh;
}
.title {

}
.btns {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.btn {
  all: unset;
  height: 200px;
  border-radius: 20px;
  color: #fff;
  box-shadow: 0 0 2px 2px #ddd;

  font-size: 3em;
  flex: 1 1 calc(50% - 20px);
  cursor: pointer;
  pointer-events: auto;
}
.btn.unable {
  pointer-events: none;
}
.cyan {
  background-color: #55FFFF;
}
.magenta {
  background-color: #ff55ff;
}
.yellow{
  background-color: #ffff55;
}
.black {
  background-color: #333;
}
.gameover {
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  color: #fff;
  position: fixed;
  top: 0;
  left: 0;
  display: none;
}
.gameover > .container {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.restart {
  background-color: rgba(255, 255, 255, 0.5);
  color: #000;
  padding: 5px 10px;
  margin-top: 5vh;
  border-radius: 5px;
  cursor: pointer;
}
@keyframes btn_click {
  50% { opacity: 0.5; transform: scale(0.9); box-shadow: 0 0 2px 2px #fff;}
  0%, 100% { opacity: 1; transform: scale(1);}
}
@keyframes btn_right {
  100% { background-color: yellowgreen }
}
@keyframes btn_wrong {
  100% { background-color: red }
}