GTK-4 window controls and other updates from GTK-3 Meld comparisons

	modified:   src/Mint-Y/gtk-4.0/sass/_common.scss

Author: SebastJava

src/Mint-Y/gtk-4.0/sass/_common.scss

@@ -421,7 +421,8 @@ button {
     border: 1px solid;
     border-radius: 5px;
     padding: 5px 8px;
-    outline-color: transparentize($button_active_bg, 0.5); // Mint-Yz
+    outline-color: transparentize($button_active_bg, 0.5);
+    outline-style: solid;
 
     @include button(normal);
 
@@ -1118,12 +1119,12 @@ windowcontrols {
 
     &.close {
       &, &:hover, &:active, &:backdrop {
-        color: $selected_fg_color;
+        color: $wm_icon_close_bg;
       }
-      @include draw_circle($selected_bg_color);
+      // @include draw_circle($selected_bg_color);
 
-      &:hover { @include draw-circle(lighten($selected_bg_color, 5%)); }
-      &:active { @include draw-circle(darken($selected_bg_color, 5%)); }
+      &:hover { @include draw-circle($wm_button_close_hover_bg); }
+      &:active { @include draw-circle($wm_button_close_active_bg); }
       &:backdrop { @include draw-circle($_wm_backdrop_icon_color); }
     }
 
@@ -1159,7 +1160,7 @@ headerbar,
 
   color: $header_fg;
   background-color: opacify($header_bg, 1);
-  box-shadow: inset 0 1px $header_highlight;
+  box-shadow: none;
 
   .csd & {  // Transparent header-bars only in csd windows
     background-color: $header_bg;
@@ -2903,8 +2904,8 @@ window.dialog.message { // Message Dialog styling
     background-image: none;
     background-color: $header_bg;
     border-bottom: 1px solid darken($header_bg, 7%);
-    border-top-left-radius: 8px;
-    border-top-right-radius: 8px;
+    border-top-left-radius: 0px;
+    border-top-right-radius: 0px;
   }
 
   .dialog-action-area button { padding: 8px; min-height: 0; }