html, body, h1, h2, p {
  margin: 0;
  border: 0;
  padding: 0;
  font: inherit;
  text-align: inherit;
  text-decoration: inherit;
  color: inherit;
  background: transparent;
}

h1 {
  font-size: 700%;
}

h2 {
  font-size: 250%;
}

html, body, main {
  height: 100%;
  background-image: url('../images/background.jpg');
  background-size: cover;
}

main {
  display: flex;
  justify-content: center;
  align-items: center;
}

.clock {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-family: sans-serif;
  font-weight: bolder;
  color: #f9f9f9;
}