body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  padding: 20px;
  gap: 20px;
  font-family: Arial, sans-serif;
}

.number-input {
  padding: 10px;
  font-size: 16px;
  width: 200px;
  text-align: center;
}

.number-button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
}

.number-button:hover {
  background-color: #0056b3;
}

.digit-flipper {
  display: inline-block;
  height: 1em;
  font-size: 4vmin;
  line-height: 1;
  margin: 0 0.05em;
  -webkit-perspective: 300px;
          perspective: 300px;
  position: relative;
  width: 0.65em;
}

.digit-decimal {
  display: inline-block;
  font-size: 4vmin;
  line-height: 1;
  height: 1em;
  width: 0.3em;
  margin: 0 0.05em;
  border: 1px solid #999;
  border-radius: 10px;
  background-color: #ffffff;
  text-align: center;
  box-sizing: border-box;
  vertical-align: top;
}

.digit-flipper__digit {
  display: block;
  height: 100%;
  position: absolute;
  text-align: center;
  width: 100%;
}
.digit-flipper__digit-top,
.digit-flipper__digit-bottom {
  color: black;
  display: block;
  position: absolute;
  -webkit-transform-origin: 50% 50%;
          transform-origin: 50% 50%;
}
.digit-flipper__digit-top {
  background-color: #ffffff;
  border-top: 1px solid #999;
  border-left: 1px solid #999;
  border-right: 1px solid #999;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  -webkit-clip-path: inset(0 0 51% 0);
          clip-path: inset(0 0 51% 0);
  overflow: hidden;
  -webkit-transform: rotateX(0deg);
          transform: rotateX(0deg);
}
.digit-flipper__digit-bottom {
  background-color: #eeeeee;
  border-bottom: 1px solid #999;
  border-left: 1px solid #999;
  border-right: 1px solid #999;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
  -webkit-clip-path: inset(51% 0 0 0);
          clip-path: inset(51% 0 0 0);
  -webkit-transform: rotateX(90deg);
          transform: rotateX(90deg);
}
.digit-flipper__digit--flip-bottom .digit-flipper__digit-bottom {
  -webkit-animation: flip-bottom .3s ease-in 0s 1 forwards;
          animation: flip-bottom .3s ease-in 0s 1 forwards;
}
.digit-flipper__digit--flip-top .digit-flipper__digit-top {
  -webkit-animation: flip-top .3s ease-in 0s 1 forwards;
          animation: flip-top .3s ease-in 0s 1 forwards;
}
@-webkit-keyframes flip-top {
  from {
    -webkit-transform: rotateX(0deg);
            transform: rotateX(0deg);
  }
  to {
    -webkit-transform: rotateX(-90deg);
            transform: rotateX(-90deg);
  }
}
@keyframes flip-top {
  from {
    -webkit-transform: rotateX(0deg);
            transform: rotateX(0deg);
  }
  to {
    -webkit-transform: rotateX(-90deg);
            transform: rotateX(-90deg);
  }
}
@-webkit-keyframes flip-bottom {
  from {
    -webkit-transform: rotateX(90deg);
            transform: rotateX(90deg);
  }
  to {
    -webkit-transform: rotateX(0deg);
            transform: rotateX(0deg);
  }
}
@keyframes flip-bottom {
  from {
    -webkit-transform: rotateX(90deg);
            transform: rotateX(90deg);
  }
  to {
    -webkit-transform: rotateX(0deg);
            transform: rotateX(0deg);
  }
}
.counter-element {
  display: inline-block;
}