<h1>Battle.net <b>style progress bar</b></h1>

<div class="progress">
  <b class="progress__bar">
    <span class="progress__text">
      Progress: <em>0%</em>
    </span>
  </b>
</div>

@import url(https://fonts.googleapis.com/css?family=Roboto:100italic,100,300italic,300,700italic,700);

$red: #c90414;
$blue: #1287cc;
$green: #00b217;
$yellow: #e89e00;
$orange: #c92f00;



@mixin innerColor( $color: #0db6e0 ) {
  
  background-color: transparentize( $color , 0.05 );
  background-image:
    linear-gradient(
      90deg, 
      transparentize( lighten( $color, 5% ), 1 ) 10%,
      transparentize( lighten( $color, 10% ), 0.2 ) 30%,
      transparentize( lighten( $color, 15% ), 0 ) 70%,
      transparentize( lighten( $color, 10% ), 0.2 ) 80%,
      transparentize( lighten( $color, 5% ), 1 ) 90%
    ),
    linear-gradient( 
      to right,
      transparentize( lighten( $color, 15% ), 1 ) 0%,
      transparentize( lighten( $color, 15% ), 0 ) 100%
    ),
    linear-gradient( 
      to left,
      transparentize( lighten( $color, 15% ), 1 ) 0%,
      transparentize( lighten( $color, 15% ), 0 ) 100%
    );
  
  border-color: lighten( $color, 20% );
  
  box-shadow: 
    0 0 0.6em lighten( $color, 10% ) inset,
    0 0 0.4em lighten( $color, 5% ) inset,
    0 0 0.5em transparentize( $color, 0.5),
    0 0 0.1em transparentize( lighten( $color, 50% ), 0.5);
  
}

.progress {
  
  font-size: 1.2em;
  height: 20px;
  
  background: rgba(255,255,255,0.05);
  border-radius: 2px;
  border: 1px solid rgba(255,255,255,0.2);
    
  &--active .progress__bar {
      opacity: 1;
  }
  
  &__text {
    
    width: 20em;
    padding: 0 0.9em; 
    position: absolute;
    
    em {
      
      font-style: normal;
      
    }
    
  }
  
  &__bar {
    
    color: white;
    font-size: 12px;
    font-weight: normal;
    text-shadow: 0 1px 1px rgba(0,0,0,0.6);
    line-height: 19px;
    
    display: block;
    position: relative;
    top: -1px;
    left: -1px;
    
    width: 0%;
    height: 100%;
    opacity: 0;
    
    border: 1px solid;
    border-radius: 2px 0 0 2px;
    
    background-size: 100px 30px, 130px 30px, 130px 30px;
    background-position: -20% center, right center, left center;
    background-repeat: no-repeat, no-repeat, no-repeat;
    
    transition: 
      opacity 0.2s ease,
      width 0.8s ease-out,
      background-color 1s ease,
      border-color 0.3s ease,
      box-shadow 1s ease;
    
    animation: pulse 2s ease-out infinite;
    
    @include innerColor($red);
    
    &--orange {
      
      @include innerColor($orange);
      
    }
    
    &--yellow {
      
      @include innerColor($yellow);
      
    }
    
    &--green {
      
      @include innerColor($green);
      
    }
    
    &--blue {
      
      @include innerColor($blue);
      
    }
    
    &:before,
    &:after {
        
      content: "";
      position: absolute;
      
      right: -1px;
      top: -10px;
      
      width: 1px;
      height: 40px;
      
    }
    
    &:before {
      
      width: 7px;
      right: -4px;
      
      background: 
        radial-gradient(
          ellipse at center,
          rgba(255,255,255,0.4) 0%,
          rgba(255,255,255,0) 75%
        );
      
    }
    
    &:after {
      
      background: 
        linear-gradient(
          to bottom, 
          rgba(255,255,255,0) 0%,
          rgba(255,255,255,0.3) 25%,
          rgba(255,255,255,0.3) 75%,
          rgba(255,255,255,0) 100%
        );
      
    }
    
  }
  
  &--complete {
    
    .progress__bar {
    
      animation: none;
      border-radius: 2px;
      
      &:after,
      &:before {
        
        opacity: 0;
        
      }
      
    }
    
  }
  
}


@keyframes pulse {
  
  0% {
    background-position: -50% center, right center, left center;
  }
  
  100% {
    background-position: 150% center, right center, left center;
  }
  
}

body, html {
  color: white;
  padding: 20px 50px;
  background: rgb(19,28,35);
  font-family: Roboto;
}

h1 { font-weight: 900; line-height: 1em; margin: 0.5em 0; }
h1 b { font-weight: 100; }

var $progress = $(".progress"),
    $bar = $(".progress__bar"),
    $text = $(".progress__text"),
    percent = 0,
    update,
    resetColors,
    speed = 1000,
    orange = 30,
    yellow = 55,
    green = 85,
    timer;

resetColors = function() {
  
  $bar
    .removeClass("progress__bar--green")
    .removeClass("progress__bar--yellow")
    .removeClass("progress__bar--orange")
    .removeClass("progress__bar--blue");
  
  $progress
    .removeClass("progress--complete");
  
};

update = function() {
  
  timer = setTimeout( function() {

    percent += Math.random() * 1.8;
    percent = parseFloat( percent.toFixed(1) );
    
    $text.find("em").text( percent + "%" );

    if( percent >= 100 ) {

      percent = 100;
      $progress.addClass("progress--complete");
      $bar.addClass("progress__bar--blue");
      $text.find("em").text( "Complete" );

    } else {
      
      if( percent >= green ) {
        $bar.addClass("progress__bar--green");
      }
      
      else if( percent >= yellow ) {
        $bar.addClass("progress__bar--yellow");
      }
      
      else if( percent >= orange ) {
        $bar.addClass("progress__bar--orange");
      }
      
      speed = Math.floor( Math.random() * 1000 );
      update();

    }

    $bar.css({ width: percent + "%" });

  }, speed);
  
};

setTimeout( function() {
  
  $progress.addClass("progress--active");
  update();
  
},1000);


$(document).on("click",  function(e) {
  
  percent = 0;
  clearTimeout( timer );
  resetColors();
  update();
  
});