fix(gtk3: misc): chromium fix border between toolbar and page content being transparent (#624)

src/gtk-3.0/sass/apps/_misc.scss

@@ -1,3 +1,4 @@

                                
                                
                                
                            
                                
                                    
                                        1 +
                                        @use "sass:color";
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            2  
                                            @use "../../../theme";
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            3  
                                            @use "../../../theme-color";
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            4  
                                            @use "../../../shadow";
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        

@@ -133,6 +134,10 @@ window.background.chromium {

                                
                                
                                
                            
                                
                                    
                                        
                                            134  
                                              > button {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            135  
                                                color: theme-color.$primary;
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            136  
                                            
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        137 +
                                            // Source: https://github.com/heldplayer/materia-theme-custom/commit/93af85f1c775745e46f92673bc55edf39b179579
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        138 +
                                            $this-border-color: theme-color.stroke(theme-color.$on-surface);
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        139 +
                                            border-color: color.mix(rgba($this-border-color, 1), theme-color.$surface-z8, color.alpha($this-border-color) * 100%);
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        140 +
                                        
                                        
                                        
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            141  
                                                &:disabled {
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            142  
                                                  color: theme-color.disabled-hint(theme-color.$on-surface);
                                        
                                        
                                            
                                            
                                            
                                            
                                        
                                    
                                
                                
                                
                            
                                
                                    
                                        
                                            143  
                                                }