Hello, I'am trying to implement the disable click example of the CSS Wizardry: 2.2 Disable Click I do not understand how to make it happen. I also look at some other sheets and I can't make it work. My goal is to "disable" a input type number when a checkbox is checked: Thank you in advance INPUT: < input type = "number" name = "attr_vitalidade" value = "5" min = "0" max = "5" class = "sheet-vitalidade" /> CHECKBOX: < input type = "checkbox" name = "attr_debFisica" value = "-1" class = "sheet-debVitalidade" > CSS: input [ type = "checkbox" ] .sheet-debVitalidade:checked ~ input [ type = "number" ] .sheet-vitalidade { pointer-events : none ; }