progress:not(value) {
	/* Add your styles here. As part of this walkthrough we will focus only on determinate progress bars. */
}

/* Styling the determinate progress element */

progress[value] {
	/* Get rid of the default appearance */
	appearance: none;
	/* This unfortunately leaves a trail of border behind in Firefox and Opera. We can remove that by setting the border to none. */
	border: none;
	/* Add dimensions */
	width: 100%;
	height: 20px;
	/* Although firefox doesn't provide any additional pseudo class to style the progress element container, any style applied here works on the container. */
	background-color: whiteSmoke;
	border-radius: 3px;
	box-shadow: 0 2px 3px rgba(0,0,0,.5) inset;
	/* Of all IE, only IE10 supports progress element that too partially. It only allows to change the background-color of the progress value using the 'color' attribute. */
	color: royalblue;
	position: relative;
	margin: 0 0 1.5em;
}

/*
 Webkit browsers provide two pseudo classes that can be use to style HTML5 progress element.
 -webkit-progress-bar -> To style the progress element container
 -webkit-progress-value -> To style the progress element value.
 */

progress[value]::-webkit-progress-bar {
	background-color: whiteSmoke;
	border-radius: 3px;
	box-shadow: 0 2px 3px rgba(0,0,0,.5) inset;
}

progress[value]::-webkit-progress-value {
	position: relative;
	background-size: 35px 20px, 100% 100%, 100% 100%;
	border-radius: 3px;
	/* Let's animate this */
	animation: animate-stripes 5s linear infinite;
}

@keyframes animate-stripes { 100% { background-position: -100px 0; } }

/* Let's spice up things little bit by using pseudo elements. */

progress[value]::-webkit-progress-value:after {
	/* Only webkit/blink browsers understand pseudo elements on pseudo classes. A rare phenomenon! */
	content: '';
	position: absolute;
	width: 5px;
	height: 5px;
	top: 7px;
	right: 7px;
	background-color: white;
	border-radius: 100%;
}

/* Firefox provides a single pseudo class to style the progress element value and not for container. -moz-progress-bar */

progress[value]::-moz-progress-bar {
	/* Gradient background with Stripes */
	background-image: -moz-linear-gradient( 135deg,
	transparent,
	transparent 33%,
	rgba(0,0,0,.1) 33%,
	rgba(0,0,0,.1) 66%,
	transparent 66%), -moz-linear-gradient( top,
	rgba(255, 255, 255, .25),
	rgba(0,0,0,.2)), -moz-linear-gradient( left, #09c, #f44);
	background-size: 35px 20px, 100% 100%, 100% 100%;
	border-radius: 3px;
	/* Firefox doesn't support CSS3 keyframe animations on progress element. Hence, we did not include animate-stripes in this code block */
}

/* Fallback technique styles */
.progress-bar {
	background-color: whiteSmoke;
	border-radius: 3px;
	box-shadow: 0 2px 3px rgba(0,0,0,.5) inset;
	/* Dimensions should be similar to the parent progress element. */
	width: 100%;
	height: 20px;
}

.progress-bar span {
	background-color: royalblue;
	border-radius: 3px;
	display: block;
	text-indent: -9999px;
}

/* The percentage will automatically fall in place as soon as we make the width fluid. Now making widths fluid. */


.html5::-webkit-progress-value, .python::-webkit-progress-value {
	/* Gradient background with Stripes */
	background-image: -webkit-linear-gradient( 135deg,
	transparent,
	transparent 33%,
	rgba(0,0,0,.1) 33%,
	rgba(0,0,0,.1) 66%,
	transparent 66%), -webkit-linear-gradient( top,
	rgba(255, 255, 255, .25),
	rgba(0,0,0,.2)), -webkit-linear-gradient( left, #09c, #f44);
}


/* Similarly, for Mozillaa. Unfortunately combining the styles for different browsers will break every other browser. Hence, we need a separate block. */

.html5::-moz-progress-bar, .php::-moz-progress-bar {
	/* Gradient background with Stripes */
	background-image: -moz-linear-gradient( 135deg,
	transparent,
	transparent 33%,
	rgba(0,0,0,.1) 33%,
	rgba(0,0,0,.1) 66%,
	transparent 66%), -moz-linear-gradient( top,
	rgba(255, 255, 255, .25),
	rgba(0,0,0,.2)), -moz-linear-gradient( left, #09c, #f44);
}

.css3::-moz-progress-bar, .php::-moz-progress-bar {
	{
	/* Gradient background with Stripes */
	background-image: -moz-linear-gradient( 135deg,
	transparent,
	transparent 33%,
	rgba(0,0,0,.1) 33%,
	rgba(0,0,0,.1) 66%,
	transparent 66%), -moz-linear-gradient( top,
	rgba(255, 255, 255, .25),
	rgba(0,0,0,.2)), -moz-linear-gradient( left, #09c, #ff0);
}

.jquery::-moz-progress-bar, .node-js::-moz-progress-bar {
	/* Gradient background with Stripes */
	background-image: -moz-linear-gradient( 135deg,
	transparent,
	transparent 33%,
	rgba(0,0,0,.1) 33%,
	rgba(0,0,0,.1) 66%,
	transparent 66%), -moz-linear-gradient( top,
	rgba(255, 255, 255, .25),
	rgba(0,0,0,.2)), -moz-linear-gradient( left, #09c, #690);
}