Custom style for map of personal data exhaust

Style.css

#ubergeojson, #original {
    line-color: @road;
    line-width: 0.5;
      [zoom>=11] { line-width: 0.5; }
      [zoom>=12] { line-width: 0.7; }
      [zoom>=13] { line-width: 1; }
      [zoom>=14] { line-width: 1.2; }
      [zoom>=15] { line-width: 1.4; }
      [zoom>=16] { line-width: 1.6; }
}

// Languages: name (local), name_en, name_fr, name_es, name_de
@name: '[name_en]';

// Color palette //
@road: #fdfdfc;

@land: #d5d5d5;

@water: #5c7b7e;

@fill1: #fff;
@fill2: #bbb;
@fill3: #777;
@fill4: #000;

Map { background-color: @land; }

// Political boundaries //
#admin[admin_level=2][maritime=0] {
  line-join: round;
  line-color: mix(@fill3,@fill2,50);
  line-width: 1;
  [zoom>=5] { line-width: 1.4; }
  [zoom>=6] { line-width: 1.8; }
  [zoom>=8] { line-width: 2; }
  [zoom>=10] { line-width: 3; }
  [disputed=1] { line-dasharray: 4,4; }
}

#admin[admin_level>2][maritime=0] {
  line-join: round;
  line-color: @fill2;
  line-width: 1;
  line-dasharray: 3,2;
  [zoom>=6] { line-width: 1.5; }
  [zoom>=8] { line-width: 1.8; }
}

#building { 
  [zoom>=15] {polygon-fill: mix(@fill2,@land,25);}
  [zoom>=16]{ polygon-fill: mix(@fill2,@land,50);}
}


#water {
  ::fill {
    polygon-fill: @water;
  }
}

#waterway {
  [type='river'],
  [type='canal'] {
    line-color: @water;
    line-width: 0.5;
    [zoom>=12] { line-width: 1; }
    [zoom>=14] { line-width: 2; }
    [zoom>=16] { line-width: 3; }
  }
  [type='stream'] {
    line-color: @water;
    line-width: 0.5;
    [zoom>=14] { line-width: 1; }
    [zoom>=16] { line-width: 2; }
    [zoom>=18] { line-width: 3; }
  }
}