* {margin: 0; padding: 0;}

.timer {
	padding: 2px;
	background: linear-gradient(top, #222, #444);
	overflow: hidden;
	display: inline-block;
	border: 1px solid #efefef;
	border-radius: 5px;
	position: relative;
}

.cell {
	/*Should only display 1 digit. Hence height = line height of .numbers
	and width = width of .numbers*/
	width: 0.60em;
	height: 20px;
	font-size: 14px;
	overflow: hidden;
	position: relative;
	float: left;
}

.numbers {
	width: 0.6em;
	line-height: 20px;
	text-align: center;
	color: #fff;
	position: absolute;
	top: 0;
	left: 0;
}

/*Styles for the controls*/
#timer_controls {
	margin-top: 0px;
    color: #fff
}
#timer_controls label {
	cursor: pointer;
}
input[name="controls"] {display: none;}

/*Control code*/
#stop:checked~.timer .numbers {animation-play-state: paused;}
#start:checked~.timer .numbers {animation-play-state: running;}
#reset:checked~.timer .numbers {animation: none;}

.moveten {
	/*The digits move but dont look good. We will use steps now
	10 digits = 10 steps. You can now see the digits swapping instead of 
	moving pixel-by-pixel*/
	animation: moveten 1s steps(10, end) infinite;
	/*By default animation should be paused*/
	animation-play-state: running;
}
.movesix {
	animation: movesix 1s steps(6, end) infinite;
	animation-play-state: running;
}

/*Now we need to sync the animation speed with time speed*/
/*One second per digit. 10 digits. Hence 10s*/
.second {animation-duration: 10s;}
.tensecond {animation-duration: 60s;} /*60 times .second*/

.milisecond {animation-duration: 1s;} /*1/10th of .second*/
.tenmilisecond {animation-duration: 0.1s;}
.hundredmilisecond {animation-duration: 0.01s;}

.minute {animation-duration: 600s;} /*60 times .second*/
.tenminute {animation-duration: 3600s;} /*60 times .minute*/

.hour {animation-duration: 36000s;} /*60 times .minute*/
.tenhour {animation-duration: 360000s;} /*10 times .hour*/

/*The stopwatch looks good now. Lets add some styles*/

/*Lets animate the digit now - the main part of this tutorial*/
/*We are using prefixfree, so no need of vendor prefixes*/
/*The logic of the animation is to alter the 'top' value of the absolutely
positioned .numbers*/
/*Minutes and Seconds should be limited to only '60' and not '100'
Hence we need to create 2 animations. One with 10 steps and 10 digits and
the other one with 6 steps and 6 digits*/
@keyframes moveten {
	0% {top: 0;}
	100% {top: -200px;} 
	/*height = 20. digits = 10. hence -200 to move it completely to the top*/
}

@keyframes movesix {
	0% {top: 0;}
	100% {top: -120px;} 
	/*height = 20. digits = 6. hence -120 to move it completely to the top*/
}