.flip {
  display: inline-block;
  position: relative;
  width: 148.5;
  height: 270px;
  line-height: 270px;
  border-radius: 10px;
  background: var(--block-color);
  font-size: 270px;
  color: var(--text-color);
  text-align: center;
  font-family: "Helvetica Neue";
  font-weight: 900;
}
.flip .digital:before,
.flip .digital:after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  background: var(--block-color);
  overflow: hidden;
  box-sizing: border-box;
}
.flip .digital:before {
  top: 0;
  bottom: 50%;
  border-radius: 10px 10px 0 0;
  border-bottom: solid 1px #ffffff;
}
.flip .digital:after {
  top: 50%;
  bottom: 0;
  border-radius: 0 0 10px 10px;
  line-height: 0;
}
.flip.down .front:before {
  z-index: 3;
}
.flip.down .back:after {
  z-index: 2;
  transform-origin: 50% 0%;
  transform: perspective(160px) rotateX(180deg);
}
.flip.down .front:after,
.flip.down .back:before {
  color: var(--text-color);
  z-index: 1;
}
.flip.down.go .front:before {
  color: var(--text-color);
  transform-origin: 50% 100%;
  animation: frontFlipDown 0.6s ease-in-out both;
  backface-visibility: hidden;
}
.flip.down.go .back:after {
  color: var(--text-color);
  animation: backFlipDown 0.6s ease-in-out both;
}
.flip.up .front:after {
  z-index: 3;
}
.flip.up .back:before {
  z-index: 2;
  transform-origin: 50% 100%;
  transform: perspective(160px) rotateX(-180deg);
}
.flip.up .front:before,
.flip.up .back:after {
  z-index: 1;
}
.flip.up.go .front:after {
  transform-origin: 50% 0;
  animation: frontFlipUp 0.6s ease-in-out both;
  backface-visibility: hidden;
}
.flip.up.go .back:before {
  animation: backFlipUp 0.6s ease-in-out both;
}
@keyframes frontFlipDown {
  0% {
    transform: perspective(160px) rotateX(0deg);
  }
  100% {
    transform: perspective(160px) rotateX(-180deg);
  }
}
@keyframes backFlipDown {
  0% {
    transform: perspective(160px) rotateX(180deg);
  }
  100% {
    transform: perspective(160px) rotateX(0deg);
  }
}
@keyframes frontFlipUp {
  0% {
    transform: perspective(160px) rotateX(0deg);
  }
  100% {
    transform: perspective(160px) rotateX(180deg);
  }
}
@keyframes backFlipUp {
  0% {
    transform: perspective(160px) rotateX(-180deg);
  }
  100% {
    transform: perspective(160px) rotateX(0deg);
  }
}
.digital.back {
  color: var(--bg-color);
}
.flip .number0:before,
.flip .number0:after {
  content: "0";
}
.flip .number1:before,
.flip .number1:after {
  content: "1";
}
.flip .number2:before,
.flip .number2:after {
  content: "2";
}
.flip .number3:before,
.flip .number3:after {
  content: "3";
}
.flip .number4:before,
.flip .number4:after {
  content: "4";
}
.flip .number5:before,
.flip .number5:after {
  content: "5";
}
.flip .number6:before,
.flip .number6:after {
  content: "6";
}
.flip .number7:before,
.flip .number7:after {
  content: "7";
}
.flip .number8:before,
.flip .number8:after {
  content: "8";
}
.flip .number9:before,
.flip .number9:after {
  content: "9";
}
.clock {
  text-align: center;
  width: 100%;
  margin: auto;
}