cartocss for cartodb dark basemap

cartocss_roads.less

/** simple visualization */

#ne_10m_roads::roads{
  [zoom >= 6]{
    [type = 'Major Highway']{
      line-width: .8;
      line-color: #E1E1E1;
    }
  }
  [zoom >= 7]{
    [type = 'Major Highway']{
      line-width: 1.2;
      line-color: #E1E1E1;
    }
    [type = 'Secondary Highway']{
      line-width: 0.6;
      line-color: #E1E1E1;
    }
  }
  [zoom >= 8]{
    [type = 'Major Highway']{
      ::glow{
        line-width: 3.6;
        line-color: #D7D7D7;
      }
      ::line{
        line-width: 1.8;
        line-color: #fff; 
      }
    }
    [type = 'Secondary Highway']{
      ::glow{
        line-width: 2.8;
        line-color: #D7D7D7;
      }
      ::line{
        line-width: 1.4;
        line-color: #fff; 
      }
    }
  }
  [zoom >= 10]{
    [type = 'Major Highway']{
      ::glow{
        line-width: 4;
        line-color: #D7D7D7;
      }
      ::line{
        line-width: 2.4;
        line-color: #fff; 
      }
    }
    [type = 'Secondary Highway']{
      ::glow{
        line-width: 3.4;
        line-color:  #D7D7D7;
      }
      ::line{
        line-width: 1.8;
        line-color: #fff; 
      }
    }
  }
}
#ne_10m_roads::ferry{
  [zoom >= 7]{
    [type = 'Ferry Route']{
      line-width: 1;
      line-color: #ABABAB;
      line-dasharray: 5,5;
      line-opacity: 0.4;
    } 
  }
}