@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Open Sans', sans-serif;
}

body {
  height: 100vh;
  background: linear-gradient(150deg, #54F5DF, #6BA9F2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.relogio {
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 200px;
  width: 550px;
  border-radius: 4px;
  box-shadow: 0px 4px 8px #000;
}

.relogio div {
  height: 160px;
  width: 150px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: rgba(0, 0, 0, .5);
  border-radius: 4px;
  letter-spacing: 4px;
}

.relogio span {
  font-weight: bolder; 
  font-size: 30px; 
}

.relogio span.tempo {
  font-size: 12px;
}

@media (max-width: 600px) {
  .relogio {
    flex-direction: column;
    height: 400px;
    width: 200px;
  }
  .relogio div {
    height: 80px;
    width: 120px;
  }
}