This is a WIP. I explain why later. I recreated the 10.6 Finder almost 2 years ago. At that time a lot of people recreated a bunch of elements from the Mac UI in CSS3. Like the dock or various kinds of aqua buttons, etc. I decided to make the Finder to l

index.haml

#finder
  #toolbar
    #traffic-light
      #red
      #yellow
      #green
    #windowname
      %i
      All My Files
    #actions
      #back
      #next
      #iconV
      #list
      #grid
      #coverflow
        %i.view
      #settings
      #share
      %input{:type => 'search', :results => '0'}
  #view
    #sidebar
      %ul
        %li
          %span.group
            Favorites
          %ul
            %li.current_page
              %i.afiles
              All My Files
            %li
              %i.airdrop
              AirDrop
            %li
              %i.apps
              Applications
            %li
              %i.desk
              Desktop
            %li
              %i.docs
              Documents
            %li
              %i.downs
              Downloads
            %li
              %i.mov
              Movies
            %li
              %i.music
              Music
            %li
              %i.pic
              Pictures
        %li
          %span.group
            Shared
    #content
      .folder
        .icon
        %span
          Desktop
      .folder
        .icon
        %span
          Documents
      .folder
        .icon
        %span
          Downloads
      .folder
        .icon
        %span
          Movies
      .folder
        .icon
        %span
          Music
      .folder
        .icon
        %span
          Pictures
      .folder
        .icon
        %span
          Public

style.sass

@import "compass"
@mixin cocoa
  display: block
  background-color: #ededed
  +box-shadow(rgba(#000, .1) 1px 1px, rgba(#000, .1) -1px -1px, rgba(#000, .1) 1px -1px, rgba(#000, .1) -1px 1px, rgba(#000, .8) 0 0 70px)
  +border-radius(5px)

@mixin aqua
  width: 12px
  height: 12px
  display: block
  margin: 5px 4px 4px 4px
  background: #000
  +float-left
  position: relative
  +background-image(radial-gradient(6px 18px, rgba(#fff, .7) 2px, rgba(#fff, 0) 5px), radial-gradient(6px -1px, #fff 1px, rgba(#fff, 0) 3px))
  +box-shadow(rgba(#000, .9) 0 1px 4px inset, rgba(#fff, .5) 0 1px)
  +border-radius(100px)

@mixin NSWindow
  position: relative
  display: block
  border-bottom: solid 1px #686868
  +background(linear-gradient(#e4e4e4, #b8b7b8))
  +box-shadow(#f1f1f1 0 1px inset)
  +border-radius(6px 6px 0 0)

@mixin NSToolbar
  height: 31px

@mixin FinderDroplet
  display: inline-block
  position: relative
  height: 20px
  width: 38px
  margin-top: 1px
  border: 1px solid #767676
  +background-image(linear-gradient(#e8e8e8, #bcbcbc))
  +box-shadow(#f1f1f1 0px 1px inset, #cccccc 0px 1px)
  +border-radius(4px)

@mixin FinderDropletView
  width: 28px
  border-left: 0px
  border-right: 0px
  +border-radius(0)
  +box-shadow(#e7e7e7 0px 1px inset, #e5e5e5 0px 2px inset, #bdbdbd 0px -1px inset, #bfbfbf 0px -2px inset, #a7a7a7 -1px 0px inset)
  
@mixin FinderDropletViewIcons
  border-left: #4a4a4a 1px solid
  border-right: #4a4a4a 1px solid

html
  display: table
  width: 100%
  height: 100%

body
  margin: 0px
  padding: 50px
  display: table-cell
  vertical-align: middle
  font-family: "Lucida Grande", sans-serif
  font-size: 12px
  user-select: none
  +text-shadow(0px 1px 1px #fff)
  +background(linear-gradient(top left, #33799d, #e8ebb4))

ul
  margin: 0
  padding: 0
  list-style-type: none
  li
    ul
      font-size: 13px
      li
        padding: 0 0 3px 15px

i
  display: inline-block
  width: 19px
  height: 19px
  position: relative
  top: 4px
  background: url('http://i.imgur.com/YO1WL.png') no-repeat

#finder
  @include cocoa
  width: 770px
  height: 435px
  margin: 0 auto
  *::before,
  *::after
    content: ""
    position: absolute
    display: block


#toolbar
  @include NSWindow

#traffic-light
  position: absolute
  display: inline
  left: 4px
  #red,
  #yellow,
  #green
    @include aqua
  #red
    background-color: #f24443
  #yellow
    background-color: #f0aa5a
  #green
    background-color: #88be72
  &:hover
    #red,
    #yellow,
    #green
      &::after
        position: absolute
        top: -2px
        left: 2px
        font-weight: bold
        font-size: 13px
        +text-shadow(rgba(#000, .6) 0px -1px)
    #red
      &::after
        content: "x"
        color: rgba(#ba1720, .5)
    #yellow
      &::after
        content: "-"
        color: rgba(#a76322, .5)
    #green
      &::after
        left: 1px
        content: "+"
        color: rgba(#46902e, .5)

#windowname
  text-align: center
  font-size: 13px
  line-height: 23px
  i
    background: url('http://i.imgur.com/hhy5Y.png') no-repeat

#actions
  @include NSToolbar
  input
    width: 278px
    height: 17px
    margin-right: 8px
    +float-right
    +border-radius(100px)

#back,
#next,
#iconV,
#list,
#grid,
#coverflow
  @include FinderDroplet

#back,
#next
  width: 25px

#back
  margin-left: 8px
  margin-right: 0
  +border-radius(4px 0 0 4px)
  color: #797979
  &::after
    content: "\25C4"
    top: 1px
    left: 9px
    font-size: 13px

#next
  left: -4px
  border-left: 0px solid #767676
  +border-radius(0 4px 4px 0)
  color: #a4a4a4
  &::after
    content: "\25C4"
    top: 4px
    left: 8px
    font-size: 13px
    +text-shadow(0px -1px -1px #fff)
    +rotate(180deg)

#iconV,
#list,
#grid,
#coverflow
  @include FinderDropletView

#iconV
  font-size: 13px
  color: #fcfcfc
  margin-left: 69px
  border-left: 1px solid #767676
  +border-radius(4px 0 0 4px)
  +background-image(linear-gradient(#767676, #9a9a9a))
  +box-shadow(#676767 -1px 1px 4px -1px inset, #676767 0px 1px inset, #757575 0px 2px inset, #999999 0px -1px inset, #969696 0px -2px inset)
  +text-shadow(0px 1px 1px #545454)
  &::before
    content: "\25AB \25AB"
    top: -2px
    left: 8px
  &::after
    content: "\25AB \25AB"
    top: 4px
    left: 8px

#list
  left: -3px
  font-size: 15px
  &::after
    content: "\1D306"
    left: 8px

#grid
  left: -7px
  &::before
    top: 5px
    left: 7px
    width: 11px
    height: 8px
    border: 1px solid
    border-top-color: #1b1b1b
    border-bottom-color: #232323
    @include FinderDropletViewIcons
    +box-shadow(#fff 0px 1px)
  &::after
    content: ""
    top: 6px
    left: 11px
    width: 3px
    height: 9px
    @include FinderDropletViewIcons

#coverflow
  left: -11px
  border-right: 1px solid #767676
  +border-radius(0 4px 4px 0)
  +box-shadow(#e7e7e7 0px 1px inset, #e5e5e5 0px 2px inset, #bdbdbd 0px -1px inset, #bfbfbf 0px -2px inset)
  &::before
    content: ""
    top: 5px
    left: 5px
    width: 13px
    height: 10px
    @include FinderDropletViewIcons
  &::after
    content: ""
    top: 6px
    left: 7px
    width: 9px
    height: 8px
    @include FinderDropletViewIcons
  i.view
    position: absolute
    top: 6px
    left: 9px
    width: 5px
    height: 6px
    border: 1px solid
    border-top-color: #1b1b1b
    border-bottom-color: #232323
    @include FinderDropletViewIcons
    +box-shadow(#fff 0px 1px)
    +background-image(linear-gradient(#6c6c6c, #868686))
    &::after
      content: ""

#settings,
#share
  @include FinderDroplet

#settings
  left: -9px
  color: #4a4a4a
  &::before
    content: "\2699"
    top: -4px
    left: 7px
    font-size: 22px
  &::after
    content: "\25B4"
    top: 2px
    right: 4px
    font-size: 17px
    +text-shadow(0px -1px -1px #fff)
    +rotate(180deg)

#share
  left: -5px
  color: #a1a1a1
  &::before
    content: ""
    top: 5px
    left: 12px
    display: block
    width: 10px
    height: 7px
    border: 2px solid
    border-top-color: #9a9a9a
    border-left-color: #a9a9a9
    border-right-color: #a9a9a9
    border-bottom-color: #a9a9a9
    +box-shadow(#fff 0px 1px)
  &::after
    content: "\27A6"
    top: -1px
    left: 16px
    font-size: 14px
    +text-shadow(0px 1px 1px #fff, -1px -1px #e9e9e9, 1px 1px #e9e9e9)

#view
  width: 770px
  height: 383px

#sidebar
  width: 133px
  height: 380px
  background-color: #e7ebf0
  +box-shadow(-1px 0 #b8b8b8 inset)
  +border-radius(0 0 0 6px)
  +float

.group
  text-transform: uppercase
  color: #707e8b
  font-weight: bold
  letter-spacing: 0px
  line-height: 25px
  padding: 5px

#content
  width: 637px
  height: 380px
  background-color: #fff
  +border-radius(0 0 6px 0)
  +float

.folder
  width: 90px
  height: 90px
  margin: 0px 20px 21px 25px
  text-align: center
  +float
  span
    display: inline-block
    width: 82px

.factive
  color: #fff
  +text-shadow(0 0)
  &::before
    width: 72px
    height: 72px
    top: 4px
    left: 9px
    background-color: #cccccc
    +border-radius(6px)
  span
    background-color: #3875d7
    +border-radius(100px)

.icon
  width: 64px
  height: 56px
  margin: 18px 13px 4px
  +background-image(linear-gradient(#b3d0e0, #7fafcc))
  +border-radius(4px 4px 2px 2px)
  +transform(perspective( 600px ) rotateX( -45deg ))
  +box-shadow(rgba(#7fafcc, .5) 1px 1px, rgba(#7fafcc, .5) -1px -1px, rgba(#7fafcc, .5) 1px -1px, rgba(#7fafcc, .5) -1px 1px, rgba(#000, .8) 0 3px 3px)
  &::before
    width: 56px
    height: 3px
    top: -4px
    left: 5px
    +border-radius(100px 100px 0 0)
    +background-image(linear-gradient(#a0c3d9, #77a9c9))
  &::after
    width: 21px
    height: 7px
    top: -11px
    left: 8px
    +background-image(linear-gradient(#b2c9da, #a0c3d9))
    +border-radius(2px 2px 0 0)

/* sidebar icons */

.afiles
  background-position: -3px -4px

.airdrop
  background-position: -3px -29px

.apps
  background-position: -3px -53px

.desk
  background-position: -3px -76px

.docs
  background-position: -3px -100px

.downs
  background-position: -3px -125px

.mov
  background-position: -3px -148px

.music
  background-position: -3px -172px

.pic
  background-position: -3px -195px

/* sidebar selection */

.current_page
  color: #f3ffff
  +text-shadow(0px 1px 1px rgba(#000, .5))
  +background(linear-gradient(#67b1df, #3489cc))
  +box-shadow(#5aa5da 0 1px inset, #6fbae5 0 2px inset, #307cbc 0 -1px inset)
  .afiles
    background: url('http://i.imgur.com/wBIjH.png') no-repeat