anchor.diff:              div.Feature.u-textCenter
                 h1 Technical Specifications & Performance
                 h4 Eye tracking performance is determined in equal parts by the hardware and software. 
  -              h4 We constantly work on our algorithms and codebase, so you can expect a steady improvement and the latest features.
  +              h4 We constantly work on our algorithms and codebase, so you can expect a steady improvement and the latest features. For more details checkout our #[a(href="https://arxiv.org/abs/1405.0006" rel="noopener") technical report].
  +              h4 The headset is configurable with different cameras, so you can get the hardware you need: from high resolution capture at 30 hz to low latency (5.7ms) 120hz eye and world camera.
  +              
               div.Grid.Grid--justifyCenter.Grid--center
                 ul
                   li Accuracy 0.60 degrees 
                   li Precision 0.08 degrees
  -                li Latency 5.7 ms (using 120hz eye and high speed world cameras)
  +                li Latency 5.7 ms using 120hz eye and high speed world cameras
                   li Slippage compensation using 3d eye model
  -                li Latency 5.7 ms (using 120hz eye and high speed world cameras)
  -
  +                li Latency 35.6 ms using 30hz eye and 5.7 ms using high speed world cameras
  +
  +            div.Feature.u-textCenter.u-padTop--1
  +              h4 Go to #[a(href='/store#additional-products' title='store') store] page to see the configurator for options, full technical specs for cameras, and sample videos.
  +              
   
       //- open source
       div.Site-gray-bkg
  
positive.code:               h4 We believe in open source. All Pupil code is released with open source licenses.
                h4 A lot of work went into making the software modular and accessible. The majority of the codebase is written in Python.
                h4 We have developed a plugin structure that enables you to extend Pupil Capture and Pupil Player to suit your needs. 
                h4 Check out the pupil repository on #[a(href="https://github.com/pupil-labs/pupil/" rel="noopener") Github]. Read developer documentation on the #[a(href="https://github.com/pupil-labs/pupil/wiki" rel="noopener") wiki].
            div.Grid-cell
              div.Feature
                figure.Feature-figure
                  img(class="Feature-image" src="../media/images/pupil_page/web/pupil_source_code.png")
  
  
      //- design
  
negative.code:                     p Visualize your data and export it. All Pupil software is open-source. You can modify it or write your own plugins to suit your needs.
                      p Download the latest version of Pupil Player and test it out with our #[a(href="" rel="noopener" title="sample dataset download") sample dataset].
                    div.Feature.u-padTop--2
                      a(href="https://github.com/pupil-labs/pupil/releases/latest" title="Download Pupil Player" rel="noopener")
                        figure.Feature-image--capturePlayerIcons
                          img(class="Feature-image" src="../media/graphics/web/pupil-app-icons/pp.png")
                        h2.u-textCenter.u-padTop--1 Pupil Player
  