fixed disabled on checkbox

scss/_checkboxes.scss

@@ -4,19 +4,6 @@ label.checkbox-inline {
   padding-left: 0; // Reset for Bootstrap rule
   cursor: pointer;
 
-  // Hide native checkbox
-  input[type=checkbox] {
-    position: absolute;
-    left: 0;
-    z-index: -1;
-    width: 0;
-    height: 0;
-    margin: 0;
-    overflow: hidden;
-    pointer-events: none;
-    opacity: 0;
-  }
-
   .checkbox-decorator {
     position: relative;
     top: 3px;
@@ -69,6 +56,17 @@ label.checkbox-inline {
 
   input[type=checkbox] {
 
+    // Hide native checkbox
+    position: absolute;
+    left: 0;
+    z-index: -1;
+    width: 0;
+    height: 0;
+    margin: 0;
+    overflow: hidden;
+    pointer-events: none;
+    opacity: 0;
+
     &:focus + .checkbox-decorator .check::after {
       opacity: 0.2;
     }
@@ -112,12 +110,21 @@ label.checkbox-inline {
 
       }
     }
-  }
 
-  input[type=checkbox][disabled] + .checkbox-decorator .check::after {
+    &[disabled],
+    fieldset[disabled] & {
+      + .checkbox-decorator .check::after,
+      .check::after {
         background-color: $mdb-text-color-primary;
         transform: rotate(-45deg);
       }
+      + .checkbox-decorator .check,
+      .check {
+        border-color: $mdb-checkbox-border-color-disabled;
+      }
+    }
+  }
+
 }
 
 @keyframes checkbox-on {

scss/_variables.scss

@@ -85,6 +85,7 @@ $mdb-checkbox-animation-ripple: 500ms !default;
 $mdb-checkbox-animation-check: 0.3s !default;
 $mdb-checkbox-checked-color: $brand-primary !default;
 $mdb-checkbox-border-color: $mdb-label-color-inner-focus !default;
+$mdb-checkbox-border-color-disabled: $gray-light !default; //#bdbdbd !default;
 
 // Switches
 $mdb-switch-label-padding: .3125rem !default; // 5px