*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

#asdf {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  font-family: "Times New Roman", serif;
  font-size: 2vw;
  line-height: 1;
  color: black;
  background-color: forestgreen;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-drag: none;
  -webkit-user-select: none;
}

.hour {
  position: fixed;
  top: 50%;
  left: 50%;
  text-align: center;
}

@media screen and (orientation: landscape) {
  .hour {
    height: 50vh;
    font-size: 5vh;
  }
}

@media screen and (orientation: portrait) {
  .hour {
    height: 50vw;
    font-size: 5vw;
  }
}

.minute {
  position: fixed;
  top: 50%;
  left: 50%;
  text-align: center;
}

@media screen and (orientation: landscape) {
  .minute {
    height: 75vh;
    font-size: 5vh;
  }
}

@media screen and (orientation: portrait) {
  .minute {
    height: 75vw;
    font-size: 5vw;
  }
}

.second {
  position: fixed;
  top: 50%;
  left: 50%;
  height: 100vh;
  text-align: center;
}

@media screen and (orientation: landscape) {
  .second {
    height: 100vh;
    font-size: 5vh;
  }
}

@media screen and (orientation: portrait) {
  .second {
    height: 100vw;
    font-size: 5vw;
  }
}