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

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;

  text-align: center;
  flex-direction: column;
}

h1 {
  margin-bottom: 5vw;
  font-size: 4.5vw;
}

button {
  width: 250vw;
  max-width: 250px;
  padding: 1vw 2vw;
  text-align: center;
  font-size: 1.5vw;

  display: inline-block;
  cursor: pointer;
  border: none;
  box-shadow: 0 9px #999;
}
button:hover {
  background: #ffa43b;
  box-shadow: 0 9px #885d20;
}
button:active {
  background: linear-gradient(-135deg, #bdff09, #ffa43b, #ff0044);
}


.navigation-button {
  display: flex;
  flex-direction: row;
  margin-bottom: 2vw;
}


.clock {
  background: linear-gradient(-135deg, #878200, #e19235, #ff0044);
  width: 500vw;
  height: 500vw;
  max-width: 500px;
  max-height: 500px;
  border: 10px solid black;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;

  box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}


.info {
  color: #fef9c3;
  position: absolute;
  border-radius: 5px;
  text-align: center;
  padding: 0.5vw;
  letter-spacing: 0.1vw;
  font-weight: bold;
}


@media (max-width: 760px) {
  h1 {
    font-size: 9vw;
  }

  button {
    width: 40vw;
    padding: 1vw;
    font-size: 3vw;
    margin-bottom: 3vw;
  }
  .clock {
    width: 80vw;
    height: 80vw;
  }
}

@media (max-width: 480px) {
  h1 {
    padding: 1vw;
    font-size: 8.8vw;
  }

  button {
    width: 30vw;
    padding: 1.2vw;
    font-size: 2.8vw;
    margin-bottom: 4vw;
  }
  .clock {
    width: 60vw;
    height: 60vw;
  }
}