.title
  %h1 
    Swanky little accordian list
  %h2
    Made in pure CSS, click on the items to see it in action!
.wrapper
  %input{:id => 'pictures',:type => 'checkbox'}
  %label{:for => 'pictures'}
    %p Documentation & more
    %div.lil_arrow
    .content
      %ul
        %li
          %a{:href => '#'} Design briefs
        %li
          %a{:href => '#'} Non Disclosure
        %li
          %a{:href => '#'} Company Brochure
    %span
  %input{:id => 'jobs',:type => 'checkbox'}
  %label{:for => 'jobs'}
    %p Upcoming Jobs
    %div.lil_arrow
    .content
      %ul
        %li
          %a{:href => '#'} Weekly Forecast
        %li
          %a{:href => '#'} Timescales
        %li
          %a{:href => '#'} Quotes
    %span
  %input{:id => 'events',:type => 'checkbox'}
  %label{:for => 'events'}
    %p Events & Task Management
    %div.lil_arrow
    .content
      %ul
        %li
          %a{:href => '#'} Calendar
        %li
          %a{:href => '#'} Important Dates
        %li
          %a{:href => '#'} Someting Event related
    %span
  %input{:id => 'financial',:type => 'checkbox'}
  %label{:for => 'financial'}
    %p Invoicing & financial
    %div.lil_arrow
    .content
      %ul
        %li
          %a{:href => '#'} Invoicing Templates
        %li
          %a{:href => '#'} Invoice Archives
        %li
          %a{:href => '#'} Send Invoice
    %span
  %input{:id => 'settings',:type => 'checkbox'}
  %label{:for => 'settings'}
    %p System Settings
    %div.lil_arrow
    .content
      %ul
        %li
          %a{:href => '#'} User Settings
        %li
          %a{:href => '#'} Edit Profile
        %li
          %a{:href => '#'} Do something cool
    %span

View Compiled
/* Fonts */

@import url(https://fonts.googleapis.com/css?family=Oswald);
$easing:cubic-bezier(0.680, -0.550, 0.265, 1.550);

/* Variables */

$color:white;
$font:'Oswald', sans-serif;
                                                      
/* Styles */

body{
  background:rgb(134, 187, 137);
  font-family:$font;
  .title{
    width:500px;
    margin:0 auto;
    text-align:center;
    h1,h2{
      color:white;
      font-weight:normal;
      margin:0;
      text-shadow: 0px 2px rgba(0, 0, 0, 0.18);
    }
    h1{
      font-size:30px;
      margin-top:40px;
    }
    h2{
      font-size:15px;
      margin-bottom:30px;
    }
  }
  .wrapper{
    width:400px;
    margin:0 auto;
    background: white;
    border-radius:4px;
    position:relative;
    box-shadow: 0px 2px rgba(0, 0, 0, 0.12); 
    label{
      display: block;
      position:relative;
      color: #b5abab;
      overflow:hidden;
      cursor: pointer;
      height: 56px;
      -webkit-transition: text-indent 0.2s;
      text-indent:20px;
      padding-top: 1px;
    }
    ul{
      margin:0;
      padding:0;
    }
    li{
      color:white;
      list-style-type:none;
      a{
        display:block;
        width:100%;
        padding: 15px 0px;
        text-decoration:none;
        color:white;
        border-bottom:1px solid rgba(0, 0, 0, 0.06);
      }
      a:hover{
        background-color:rgba(0, 0, 0, 0.06);
      }
    }
    label:hover{
      background:rgba(203, 228, 205, 0.6) !important;
      color: rgb(79, 115, 81);
      text-indent:30px;
      -webkit-transition: text-indent 0.2s;
	    -moz-transition: text-indent 0.2s;
	    transition: text-indent 0.2s;
    }
    input[type="checkbox"]{
      display:none;
    }
    span{
      height:3px;
      position:absolute;
      width:0px;
      display:block;
      top: 58px;
      background:#38B087;
    }
    .content{
      height: 0;
      background: rgba(92, 127, 94, 0.72);
      height: 300px;
      position: relative;
      border-top: 2px solid rgba(0, 0, 0, 0.12);
      top: 4px;
    }
    .lil_arrow{
      width:5px;
      height:5px;
      -webkit-transition: transform 0.8s;
      transition: transform 0.8s;
      -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
      border-top:2px solid rgba(0, 0, 0, 0.33);
      border-right:2px solid rgba(0, 0, 0, 0.33);
      float:right;
      position:relative;
      top: -30px;
      right: 27px;
      transform:rotate(45deg)
    }
    input[type="checkbox"]:checked + label > .content{
      display:block;
    }
    input[type="checkbox"]:checked + label > span{
      display:none;
    }
    input[type="checkbox"]:checked + label > .lil_arrow{
      -webkit-transition: transform 0.8s;
      transition: transform 0.8s;
      -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
      transform:rotate(135deg)
    }
    input[type="checkbox"]:checked + label{
      display: block;
      background: rgba(203, 228, 205, 0.6) !important;
      color: rgb(79, 115, 81);
      text-indent:30px;height: 225px;
      -webkit-transition: height 0.8s;
      transition: height 0.8s;
      -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    }
    label:hover > span{
      width:100%;
     -webkit-transition-timing-function:$easing;
      transition: width 0.4s;
    }
    input[type='checkbox']:not(:checked) + label{
      display:block;
      -webkit-transition: height 0.8s;
	    -moz-transition: height 0.8s;
	    transition: height 0.8s;
      height:60px;
      -webkit-transition-timing-function:$easing;
    }
  }
}
::-webkit-scrollbar { 
  display: none; 
}
View Compiled
/* Nope, not today */																											

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js