*, *::after, *::before {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 2.25rem;
}

body {
  background-color: #f2f1ed;
  color: #000103;
  margin: 0;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 2rem;
}

.title {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.timer-container {
  display: flex;
  gap: 1rem;
}

.segment {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.flip-card {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  box-shadow: 0 2px 3px 0 rgba(0, 0, 0, .2);
  border-radius: .1em;
}

.top,
.bottom,
.flip-card .top-flip,
.flip-card .bottom-flip {
  height: .75em;
  line-height: 1;
  padding: .25em;
  overflow: hidden;
}

.top,
.flip-card .top-flip {
  background-color: #f7f7f7;
  border-top-right-radius: .1em;
  border-top-left-radius: .1em;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.bottom,
.flip-card .bottom-flip {
  background-color: white;
  display: flex;
  align-items: flex-end;
  border-bottom-right-radius: .1em;
  border-bottom-left-radius: .1em;
}

.flip-card .top-flip {
  position: absolute;
  width: 100%;
  transform-origin: bottom;
}

.flip-card .bottom-flip {
  position: absolute;
  bottom: 0;
  width: 100%;
  transform-origin: top;
}

.flip-card[data-hours-tens] .bottom-flip,
.flip-card[data-hours-ones] .bottom-flip {
  animation: flip-horizontal 250ms ease-out;
}

.flip-card[data-minutes-tens] .bottom-flip,
.flip-card[data-minutes-ones] .bottom-flip,
.flip-card[data-seconds-tens] .bottom-flip,
.flip-card[data-seconds-ones] .bottom-flip {
  animation: flip-vertical 250ms ease-out;
}

@keyframes flip-horizontal {
  0% {
    transform: rotateY(0deg);
  }
  50% {
    transform: rotateY(-90deg);
  }
  100% {
    transform: rotateY(-180deg);
  }
}

@keyframes flip-vertical {
  0% {
    transform: rotateX(0deg);
  }
  50% {
    transform: rotateX(90deg);
  }
  100% {
    transform: rotateX(180deg);
  }
}

button {
  background-color: #4887de;
  border: none;
  color: white;
  padding: 1rem 2rem;
  font-size: 1.5rem;
  border-radius: .5rem;
  margin-top: 2rem;
  cursor: pointer;
  transition: background-color 0.3s ease-in-out;
}

button:hover {
  background-color: #c53535;
}

.title {
  text-align: center;
  margin-bottom: 2rem;
}

.timer-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.segment {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1rem;
}

.segment-title {
  font-size: 1rem;
  margin-top: 1rem;
}