html {
	font-family: Arial, sans-serif;
	font-size: 16px;
	background-color: #555;
	color: #fff;
}

.clock {
	position: absolute;
	top: 45%;
	right: 23%;
	transform: translate(-50%, -50%);
	text-align: center;
}

.hours,
.minutes,
.seconds {
	display: inline-block;
	font-size: 4rem;
	padding: 0.5rem;
	background-color: #111;
	border-radius: 10px;
}

.date {
	font-size: 1.5rem;
	margin-top: 1rem;
}
/* inserido por José Alfredo */

@media only screen and (max-width: 940px) {
	.clock, 
	.hours,
	.minutes,
	.seconds, 	  
	.date {
		font-size: 1.5rem;
	}
  }

@media only screen and (max-width: 768px) {
	.clock, 
	.hours,
	.minutes,
	.seconds,
	{
	  font-size: 1.3rem; }
	.date {
		font-size:0.8rem ;
	}
  }
  
  @media only screen and (max-width: 420px) {
	.clock,
	.hours,
	.minutes,
	.seconds, {
	  font-size: 0.8rem;
	}
	.date {
		font-size: 0.6rem;	
	}
  }

  @media only screen and (max-width: 380px) {
	.clock,
	.hours,
	.minutes,
	.seconds, {
	  font-size: 0.7rem;
	}
	.date {
		font-size: 0.5rem;	
	}
  }