[Lain]

I have now managed to fold in / out many attempts with the tpl and css which I was not familiar with but simply tried a lot and it also works well with the thickness of the inner lines and curves .... etc

PHP Code:

#shoutbox .panel {border-left: solid 1px rgba(0,0,0,0.1); }
#shoutbox .panel {border-right: solid 1px rgba(0,0,0,0.1); }
#shoutbox .panel {border-bottom: solid 1px rgba(0,0,0,0.1); }

#shoutbox .window {border-radius: 0px 0px 5px 5px; border: solid 1px rgba(0,0,0,0.05); overflow-y: scroll; } 


IMO the easiest way to learn any sort of programming is to just keep trying things to slowly figure out how they work on your own.
Good that you managed to end up with something you're satisfied with.