style.css

* {
  margin: 0;
  padding: 0;
}

#container {
  align-items: center;
  background-color: cadetblue;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  min-width: 100vw;
}

#clock {
  align-items: center;
  background-color: burlywood;
  border-radius: 8px;
  display: flex;
  height: 40vh;
  justify-content: center;
  width: 80vh;
}

#display {
  align-items: center;
  background-color: darkgray;
  border-radius: 8px;
  color: antiquewhite;
  display: grid;
  font-size: 25vh;
  grid-template-columns: 4fr 1fr 4fr 1fr;
  height: calc(100% - 3rem);
  width: calc(100% - 3rem);
}

#hours {
  display: flex;
  justify-content: flex-end;
}

#colon {
  padding-bottom: 1rem;
}

#seconds_am-pm {
    align-items: inherit;
    display: grid;
    font-size: 5vh;
    grid-template-rows: 1fr 1fr;
    height: 20vh;
}

.spans {
  display: none;
}