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HTML 

              
                #clock
  .hour  
    .min
    .min
    .min
    .min
    .min
  .hour
    .min
    .min
    .min
    .min
    .min
  #alarm  
  #min
  #hour
  #sec
  ol
    li
    li
    li
    li
    li
    li
    li
    li
    li
    li
    li
    li
!

CSS 

              
                // Best rendered in Google Chrome. Still working out small visual bugs.

@mixin center {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
}

@mixin before-after{
  display: block;
  content:"";
  position: absolute;
}

@mixin before-after-tick {
  display: block;
  content:"";
  position: absolute;
  height: inherit;
  width: inherit;
  background: inherit;
  box-shadow: inherit;
  backface-visibility: inherit;
}


*,*:before,*:after{
  box-sizing: border-box;
}

html, body { height: 100%; width: 100%;}

body{
  font-size: 100%;
  font-family: helvetica;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: linear-gradient(to bottom, rgba(150,150,150,1) 0%,rgba(110,110,110,1) 100%); 
}

$tick: #383838;
$alarm: linear-gradient(to bottom, #f6f6f6 0%, #f8f8f8 100%);
$sec: #fbc900;
$min-hour: #303030; 
$watch-body: #fff;

#clock{
  @include center;
  width: 21em;
  height: 21em;
  border-radius: 50%;
  background: #eee;
  border: 0.2em solid #d0d0d0;
  box-shadow:
    0 1.2em 0 -1em rgba(255,255,255,1),
    0 -0.1em 0.3em 0 #fff,
    0 0 0 0.6em #e7e7e7,
    0 0.6em 1.2em 0 rgba(0,0,0,0.5),
    inset 0 0.5em 1em 0 rgba(0,0,0,0.3),
    inset 0 0 8em 0 rgba(0,0,0,0.2)
    
    ;
  
  &:before{
    @include before-after;
    background: #dedede;
    left: -2em;
    top: -2em;
    width: 25em;
    height: 25em;
    border-radius: 4.6em;
    z-index:-1;
    box-shadow:
      inset 0 -0.2em 0.2em 0 rgba(0,0,0,0.2),
      inset 0 0.2em 2em 0 #fff;
  }
  
  &:after{
    @include before-after;
    height: inherit;
    width: inherit;
    background: transparent;
    top: 0;
    left: 0;
    border-radius: inherit;
    box-shadow:
      inset 12em 14em 0 -10em rgba(255,255,255,0.25);
    z-index: 4;
  }
  
  // Hours
  .hour{
    @include center;
    //backface-visibility: hidden;
    width: 0.5em;
    height: 16.4em;
    background: transparent;
    box-shadow:
      0 -1em 0 -0.1em $tick,
      0 1em 0 -0.1em $tick;
    transform: rotate(30deg);
    
    &:after,
    &:before{
      @include before-after-tick;
    }
    
    &:before { transform: rotate(30deg); }
    &:after  { transform: rotate(-30deg); }
    &:nth-of-type(1) { transform: rotate(-60deg);}
  } 
  
  // Minutes
  .min{
    @include center;
    //backface-visibility: hidden;
    width: 0.3em;
    height: 17em;
    background: transparent;
    box-shadow:
      0 -0.6em 0 -0.1em $tick,
      0 0.6em 0 -0.1em $tick;
    z-index:-1;
    transform: rotate(-54deg);
    
    &:after,
    &:before{
      @include before-after-tick;
      z-index:0;
    }
    
    &:before { transform: rotate(6deg); }
    &:after  { transform: rotate(12deg); }
    
    &:nth-child(2){ transform: rotate(-36deg); }
    &:nth-child(3){ transform: rotate(-18deg); }
    &:nth-child(4){ transform: rotate(6deg); }
    &:nth-child(5){ transform: rotate(24deg); }
  }
}

//
// Alarm Hand
//
#alarm{
  @include center;
  background: #f8f8f8;
  width: 2.6em;
  height: 2.6em;
  border-radius: 50%;
  transform: rotate(-45deg);
  box-shadow: 0 0.2em 0.4em 0 rgba(0,0,0,0.1);
  
  &:after{
    @include before-after;
    width: 0.4em;
    height: 4.8em;
    top: -4.6em;
    background: $alarm;
    left: 0;
    right: 0;
    margin: 0 auto;
    z-index:-3;
    box-shadow:
      inset 0 1.2em 0 #4ca440,
      -0.2em -0.2em 0.3em 0 rgba(0,0,0,0.1);
  }
}

//
// Second Hand
//
#sec{
  @include center;
  background: radial-gradient(ellipse at center, rgba(255,211,34,1) 0%,rgba(251,201,0,1) 100%);;
  width: 2em;
  height: 2em;
  border-radius: 50%;
  border: 0.14em solid $sec;
  z-index: 3;
  
  &:before,
  &:after{
    @include before-after;
  }
  &:before{
    background: $sec;
    width: 0.8em;
    height: 1.5em;
    top: 1.8em;
    left: 0;
    right: 0;
    margin: 0 auto;
    border-radius: 0 0 2em 2em;
  }
  &:after{
    width: 0.18em;
    height: 7.6em;
    top: -7.6em;
    background: $sec;
    left: 0;
    right: 0;
    margin: 0 auto;
  }
  
}

//
// Minute and Hour Hands
//
#min,
#hour{
  z-index: 2;
  @include center;
  background: $sec;
  transform-origin: bottom center;
}
#min{
  width: 0.6em;
  height: 8.6em;
  top: -8.6em;
  border-radius: 2em 2em 0 0;
  box-shadow:
    inset 0 0 0 0.16em $min-hour,
    inset 0 -6em 0 0 $min-hour,
    -0.2em -0.2em 0.4em 0 rgba(0,0,0,0.2);
}

#hour{
  width: 0.7em;
  height: 7em;
  top: -7em;
  border-radius: 2em 2em 0 0;
  box-shadow:
    inset 0 0 0 0.16em $min-hour,
    inset 0 -4.2em 0 0 $min-hour,
    -0.2em -0.2em 0.4em 0 rgba(0,0,0,0.2);
}

ol {
  position: relative;
  height: inherit;
  width: inherit;
  li {
    counter-increment: customlistcounter;
    font-size: 1.4rem;
    display: inline-block;
    position: absolute;
    letter-spacing: -0.1em;
    color: $tick;
    text-align: center;

    &:before {
      content: counter(customlistcounter) "";
    }
    
    &:nth-child(1),
    &:nth-child(2),
    &:nth-child(4),
    &:nth-child(5),
    &:nth-child(7),
    &:nth-child(8),
    &:nth-child(10),
    &:nth-child(11){
      font-size: 0;
    }
    
    &:nth-child(3){
      top: 6.95em;
      right: 2.4em;
    }
    &:nth-child(9){
      top: 6.95em;
      left: 2em;
    }
    
    
    &:nth-child(6){
      bottom: 2.1em;
      left: 7.06em;
    }
    &:nth-child(12){
      top: 1.9em;
      left: 6.78em;
    }
    
  }
}
!

JS 

              
                // Yay for SO - http://stackoverflow.com/questions/23847310/css-and-jquery-analog-clock-smooth-animation
//use requestAnimationFrame for smoothness (shimmed with setTimeout fallback)
window.requestAnimFrame = (function(){
  return  window.requestAnimationFrame       ||
          window.webkitRequestAnimationFrame ||
          window.mozRequestAnimationFrame    ||
          function( callback ){
              window.setTimeout(callback, 1000 / 60);
          };
})();

//initialize the clock in a self-invoking function
(function clock(){ 
    var hour = document.getElementById("hour"),
        min = document.getElementById("min"),
        sec = document.getElementById("sec");
    //set up a loop
    (function loop(){
        requestAnimFrame(loop);
        draw();
    })();
    //position the hands
    function draw(){
        var now = new Date(),//now
            then = new Date(now.getFullYear(),now.getMonth(),now.getDate(),0,0,0),//midnight
            diffInMil = (now.getTime() - then.getTime()),// difference in milliseconds
            h = (diffInMil/(1000*60*60)),//hours
            m = (h*60),//minutes
            s = (m*60);//seconds
        //rotate the hands accordingly
        sec.style.webkitTransform = "rotate(" + (s * 6) + "deg)";
        hour.style.webkitTransform = "rotate(" + (h * 30 + (h / 2)) + "deg)";
        min.style.webkitTransform = "rotate(" + (m * 6) + "deg)";
    } 
})();
!
999px

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