assets/stylesheets/material/material/_button.scss in material-sass-4.0.0.beta3 vs assets/stylesheets/material/material/_button.scss in material-sass-4.0.0

@@ -49,37 +49,37 @@
 
   &:focus {
     outline: 0;
   }
 
-  &:not([disabled]):not(.disabled) {
+  &:not(:disabled):not(.disabled) {
     cursor: pointer;
   }
 
   .show > &.dropdown-toggle {
     background-image: linear-gradient(to bottom, $btn-overlay, $btn-overlay);
   }
 }
 
 // stylelint-disable selector-no-qualifying-type
 a.btn.disabled,
-fieldset[disabled] a.btn {
+fieldset:disabled a.btn {
   pointer-events: none;
 }
 // stylelint-enable
 
 @each $color, $values in $theme-colors {
   .btn-#{$color} {
-    background-color: map-get(theme-color($color), color);
-    color: color-yiq(map-get(theme-color($color), color));
+    background-color: theme-color($color);
+    color: color-yiq(theme-color($color));
 
     @include active-focus-hover {
-      color: color-yiq(map-get(theme-color($color), color));
+      color: color-yiq(theme-color($color));
     }
 
     &.active,
     &:active {
-      background-color: map-get(theme-color($color), darker);
+      background-color: theme-color-dark($color);
     }
 
     &.disabled,
     &:disabled {
       background-color: $btn-bg-disabled;