[libadwaita/wip/jimmac/dropshadow-buttons] buttons: emphasized depth for most

[Jakub Steiner <jimmac src gnome org>]

commit 2447a7f0768b4da5430f91f8089c9274ebbd0c1a
Author: Jakub Steiner <jimmac gmail com>
Date:   Tue Nov 2 14:22:35 2021 +0100

    buttons: emphasized depth for most
    
    - emphasize affordance for non-colored buttons
    
    See https://gitlab.gnome.org/GNOME/libadwaita/-/issues/228

 src/stylesheet/widgets/_buttons.scss | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/src/stylesheet/widgets/_buttons.scss b/src/stylesheet/widgets/_buttons.scss
index d3ae7b13..6941d512 100644
--- a/src/stylesheet/widgets/_buttons.scss
+++ b/src/stylesheet/widgets/_buttons.scss
@@ -15,6 +15,7 @@ button {
     padding: 5px 10px;
     border-radius: $button_radius;
     font-weight: bold;
+    box-shadow: 0 1px 1px rgba(0,0,0,0.2), 0 1px 2px rgba(0,0,0,0.1);
 
     @include focus-ring();
     transition: $button_transition;
@@ -37,6 +38,7 @@ button {
 
       &:checked {
         background-color: $button_checked_color;
+        box-shadow: none;
 
         &:hover {
           background-color: $button_checked_hover_color;
@@ -45,6 +47,7 @@ button {
         &.keyboard-activating,
         &:active {
           background-color: $button_checked_active_color;
+          box-shadow: none;
         }
       }
     }
@@ -109,6 +112,7 @@ button {
     min-height: 32px;
     @include focus-ring($outer: true, $offset: 1px);
     transition: $button_transition;
+    box-shadow: none;
 
     color: $osd_fg_color;
     background-color: transparentize(black, .35);
@@ -148,7 +152,7 @@ button {
   }
 
   @at-root %opaque_button {
-    box-shadow: none;
+    box-shadow: none; /* dark bg with dropshadow looks odd */
 
     @include focus-ring($outer: true, $offset: 1px);
     transition: $button_transition;