styles.css

*,
*:before,
*:after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: sans-serif;
  /* font-size: 62.5%; */
  line-height: 1.5;
  background-image: url("landscape.jpg");
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  background-attachment: fixed;
  color: white;
  overflow: hidden;
}

.container {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 2rem;
}

#heading {
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  font-size: 1.5rem;
  text-align: center;
  color: white;
}

.clock {
  display: flex;
}
#hour,
#minutes,
#second {
  width: 55px;
  height: 100%;
  background-color: slateblue;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.items {
  position: relative;
  width: 55px;
  height: 100%;
  display: flex;
  flex-direction: column;
  margin: 0.4rem;
  justify-content: center;
  align-items: center;
  /* padding: 1rem;/ */
  opacity: 0.9;
  text-shadow: 2px 2px 2px rgba(0, 0, 0 0.3);
}

.items span {
  font-size: 1.8rem;
}

.items .text {
  font-size: 0.5rem;
  letter-spacing: 0.09rem;
  background: darkblue;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  text-transform: uppercase;
}

.items #ampm {
  position: absolute;
  width: 100%;
  background-color: green;
  height: 37%;
  bottom: 0;
  font-size: 1rem;
  opacity: 0.8;
  text-align: center;
  background-color: ;
}