:root {
  --half-height: 0.72em;
  --border-radius: 0.15em;
}

.countdown {
  /* position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-5 0%, calc(-50% + 60px)); */
  /* padding-top: calc(60vh / 2);
  padding-bottom: calc(60vh / 2); */
  display: flex;
  justify-content: center;
  align-items: center;
  height: calc(50vh - 68px);
  @media (min-width:992px) {
    height: calc(50vh - 94px);
  }
}

.flip-clock {
  text-align: center;
  perspective: 400px;
  margin: 20px auto;
}

.flip-clock *,
.flip-clock *::before,
.flip-clock *::after {
  box-sizing: border-box;
}

.flip-clock__piece {
  display: inline-block;
  margin: 0 5px;
}

.flip-clock__slot {
    font-size: 1rem;
    color: white;
}

.timercard {
  display: block;
  position: relative; 
  padding-bottom: var(--half-height);
  line-height: 0.95;
  font-size: 9vw;
  @media (min-width: 1920px) {
    font-size: 7vw;
  }
}

.timercard__top,
.timercard__bottom,
.timercard__back::before,
.timercard__back::after {
  display: block;
  height: var(--half-height);
  color: #ccc;
  background: #222;
  padding: 0.25em 0.25em;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  width: 1.8em;
  transform: translateZ(0);
  top: 2px;
  position: relative;
  max-width: 340px;
  left: .25px;
  @media (min-width:992px) [
    left: .55px;
  ]
}
.timercard__bottom { 
  color: #FFF;
  position: absolute;
  top: 50.5%;
  left: 0;
  border-top: solid 1px #000;
  background: #393939; 
  border-radius: 0 0 var(--border-radius) var(--border-radius); 
  pointer-events: none;
  overflow: hidden;
}

.timercard__bottom::after {
  display: block;
  margin-top: calc(-1 * var(--half-height));
}

.timercard__back::before,
.timercard__bottom::after {
  content: attr(data-value);
}

.timercard__back {
  position: absolute;
  top: 0;
  height: 100%;
  left: 0;
  pointer-events: none;
}

.timercard__back::before {
  position: relative;
  z-index: -1;
  overflow: hidden;
}

.flip .timercard__back::before {
  animation: flipTop 0.3s cubic-bezier(.37,.01,.94,.35);
  animation-fill-mode: both;
  transform-origin: center bottom;
}

.flip .timercard__back .timercard__bottom {
  transform-origin: center top;
  animation-fill-mode: both;
  animation: flipBottom 0.6s cubic-bezier(.15,.45,.28,1); /* 0.3s; */
}

@keyframes flipTop {
  0% {
    transform: rotateX(0deg);
    z-index: 2;
  }
  0%, 99% {
    opacity: 0.99;
  }
  100% {
    transform: rotateX(-90deg);
    opacity: 0;
  }
}

@keyframes flipBottom {
  0%, 50% {
    z-index: -1;
    transform: rotateX(90deg);
    opacity: 0;
  }
  51% {
    opacity: 0.99;
  }
  100% {
    opacity: 0.99;
    transform: rotateX(0deg);
    z-index: 5;
  }
}