Two-Variable Points in Carto

/************************styled on two variables (pop and score)***********/
.point {
  [pop<=10000] {
    [zoom>0][zoom<7] { marker-height: 0.5; }
    [zoom>6][zoom<9] { marker-height: 2; }
    [zoom>8][zoom<12] { marker-height: 8; }
    [zoom>11] { marker-height: 10; }
    [score<15] { marker-line-color: #253494; marker-fill: #2C7FB8; }
    [score>=15][score<20] { marker-line-color: #253494; marker-fill: #41B6C4; }
    [score>=20][score<25] { marker-line-color: #253494; marker-fill: #7FCDBB; }
    [score>=25][score<30] { marker-line-color: #253494; marker-fill: #C7E9B4; }
    [score>=30] { marker-line-color: #253494; marker-fill: #FFFFCC; }
  }

  [pop>10000][pop<=50000] {
    [zoom>0][zoom<7] { marker-height: 0.5; }
    [zoom>6][zoom<9] { marker-height: 2; }
    [zoom>8][zoom<12] { marker-height: 10; }
    [zoom>11] { marker-height: 12; }
    [score<15] { marker-line-color: #253494; marker-fill: #2C7FB8; }
    [score>=15][score<20] { marker-line-color: #253494; marker-fill: #41B6C4; }
    [score>=20][score<25] { marker-line-color: #253494; marker-fill: #7FCDBB; }
    [score>=25][score<30] { marker-line-color: #253494; marker-fill: #C7E9B4; }
    [score>=30] { marker-line-color: #253494; marker-fill: #FFFFCC; }
  }

  [pop>50000][pop<=100000] {
    [zoom>0][zoom<7] { marker-height: 2; }
    [zoom>6][zoom<9] { marker-height: 10; }
    [zoom>8][zoom<12] { marker-height: 12; }
    [zoom>11] { marker-height: 15; }
    [score<15] { marker-line-color: #253494; marker-fill: #2C7FB8; }
    [score>=15][score<20] { marker-line-color: #253494; marker-fill: #41B6C4; }
    [score>=20][score<25] { marker-line-color: #253494; marker-fill: #7FCDBB; }
    [score>=25][score<30] { marker-line-color: #253494; marker-fill: #C7E9B4; }
    [score>=30] { marker-line-color: #253494; marker-fill: #FFFFCC; }
  }

  [pop>100000][pop<=500000] {
    [zoom>0][zoom<7] { marker-height: 5; }
    [zoom>6][zoom<9] { marker-height: 15; }
    [zoom>8][zoom<12] { marker-height: 18; }
    [zoom>11] { marker-height: 20; }
    [score<15] { marker-line-color: #253494; marker-fill: #2C7FB8; }
    [score>=15][score<20] { marker-line-color: #253494; marker-fill: #41B6C4; }
    [score>=20][score<25] { marker-line-color: #253494; marker-fill: #7FCDBB; }
    [score>=25][score<30] { marker-line-color: #253494; marker-fill: #C7E9B4; }
    [score>=30] { marker-line-color: #253494; marker-fill: #FFFFCC; }
  }

  [pop>500000] {
    [zoom>0][zoom<5] { marker-height: 10; }
    [zoom>4][zoom<9] { marker-height: 12; }
    [zoom>8][zoom<12] { marker-height: 25; }
    [zoom>11] { marker-height: 50; }
    [score<15] { marker-line-color: #253494; marker-fill: #2C7FB8; }
    [score>=15][score<20] { marker-line-color: #253494; marker-fill: #41B6C4; }
    [score>=20][score<25] { marker-line-color: #253494; marker-fill: #7FCDBB; }
    [score>=25][score<30] { marker-line-color: #253494; marker-fill: #C7E9B4; }
    [score>=30] { marker-line-color: #253494; marker-fill: #FFFFCC; }
  }
  marker-allow-overlap: true;     /* allow markers to overlap      */
  marker-opacity: .6;             /* set the marker to 60% opacity */
  marker-line-opacity: .8;        /* set the line to 80% opacity   */
}