refactoring and minor updates

modules/home/niri.nix

@@ -108,7 +108,7 @@ in
         animations.slowdown = 1.0;
 
         layout = {
-          gaps = 10;
+          gaps = 6;
           center-focused-column = "never";
           always-center-single-column = true;
 
@@ -149,8 +149,9 @@ in
             width = pkgs.rice.border-width + 1;
           };
 
-          shadow = {
-            enable = true;
+          struts = {
+            right = 6;
+            left = 6;
           };
         };
 
@@ -224,6 +225,18 @@ in
             ];
             open-maximized = true;
           }
+
+          {
+            matches = [
+              { is-floating = true; }
+            ];
+
+            shadow = {
+              enable = true;
+              softness = 10;
+              spread = 8;
+            };
+          }
         ];
 
         # switch-events = with config.lib.niri.actions; {