html, body {
  height: 100%;
}

body {
  background: #FFFFFF;
   background: radial-gradient(ellipse at center, #FFFFFF 0%, #FFFFFF 70%);
  background-size: 100%;
}

p {
  margin: 0;
  padding: 0;
}

#orologio {
  font-family: 'Roboto', monospace;
  color: #FFFFFF;
  text-align: center;
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  color: #000000;
  text-shadow: 0 0 40px #FFFFFF, 0 0 10px rgb(153, 153, 153);
}
#orologio .tempo {
  letter-spacing: 0.05em;
  font-size: 80px;
  padding: 10px 0;
}
#orologio .data {
  letter-spacing: 0.1em;
  font-size: 24px;
}
#orologio .testo {
  letter-spacing: 0.1em;
  font-size: 12px;
  padding: 20px 0 0;
}