style.css

@import url("https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap");

body {
  background-image: url(https://source.unsplash.com/uAfZBP-GtiA/1600x900);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Roboto", sans-serif;
}

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

.clock {
  padding: 3.5em 4em;
  background: rgba(255, 255, 255, 0.25);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2em;
  position: relative;
  padding-bottom: 5em;
}

.details {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-direction: column;
  gap: 2em;
}

.time {
  font-size: 4em;
}

.date {
  font-weight: 400;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  padding: 1em;
  text-align: center;
}

@media screen and (min-width: 1000px) {
  .time {
    font-size: 6em;
  }
}

@media screen and (max-width: 1000px) {
  .clock {
    font-size: 13px;
  }
}