diff --git a/src/sass/gtk/_common-3.0.scss b/src/sass/gtk/_common-3.0.scss
index 5dcec1f6..6ea6a403 100644
--- a/src/sass/gtk/_common-3.0.scss
+++ b/src/sass/gtk/_common-3.0.scss
@@ -2456,7 +2456,8 @@ notebook {
     background-color: $base_color;
   }
 
-  .csd &:not(.frame), .csd &:not(.frame) > stack {
+  .csd &:not(.frame),
+  .csd &:not(.frame) > stack {
     border-radius: 0 0 $wm_radius $wm_radius;
   }
 
@@ -2546,10 +2547,8 @@ notebook {
 
           @if $monterey == 'false' {
             // tab overlap
-            + tab {
-              @if $_pos==top or $_pos==bottom { margin-left: -1px; }
-              @else { margin-top: -1px; }
-            }
+            @if $_pos==top or $_pos==bottom { margin-left: -1px; }
+            @else { margin-top: -1px; }
           } @else {
             + tab {
               @if $_pos==top or $_pos==bottom { margin-left: $container_padding / 2; }
@@ -2597,17 +2596,23 @@ notebook {
       &.top,
       &.bottom {
         > tabs > tab {
-          &:first-child { border-left: none; }
-          &:last-child { border-right: none; }
+          &:last-child { margin-right: -1px; }
         }
+
+        // > tabs > arrow + tab {
+        //   margin-left: -1px;
+        // }
       }
 
       &.left,
       &.right {
         > tabs > tab {
-          &:first-child { border-top: none; }
-          &:last-child { border-bottom: none; }
+          &:last-child { margin-top: -1px;}
         }
+
+        // > tabs > arrow + tab {
+        //   margin-top: -1px;
+        // }
       }
     }
 
diff --git a/src/sass/gtk/apps/_misc.scss b/src/sass/gtk/apps/_misc.scss
index 8bb0cbe3..545a5235 100644
--- a/src/sass/gtk/apps/_misc.scss
+++ b/src/sass/gtk/apps/_misc.scss
@@ -389,6 +389,28 @@ window.background:not(.solid-csd):not(.csd) {
   }
 }
 
+button {
+  &:active {
+    color: $fg_color;
+    background-color: if($variant == 'light', mix(black, $bg_color, 10%), mix(white, $bg_color, 10%));
+    border-color: transparent;
+  }
+
+  &:checked {
+    color: $fg_color;
+    background-color: if($variant == 'light', mix(black, $bg_color, 5%), mix(white, $bg_color, 5%));
+    border-color: transparent;
+  }
+
+  .background & {
+    &:active, &:checked {
+      color: $selected_fg_color;
+      background-color: $selected_bg_color;
+      border-color: if($variant=='light', $selected_bg_color, $dark_borders_color);
+    }
+  }
+}
+
 //
 // Tilix
 //