Custom Css not working in Simple Catch Pro

Hey there, I'm using using a child theme with Simple Catch Pro and trying to use the custom css tool but not all of the code I am adding is taking any effect. I have been playing around with it for a while and updated everything so I am not sure what I am doing wrong. Some of the code I have used has worked but only on a few rare occasions. Specifically I am tring to centre the menu text using this code: `.menu.catchresponsive-nav-menu, #menumain { float: none; text-align: center; width: 100%; } .catchresponsive-nav-menu li { float: none; } How do I fix my custom css or use it properly in the first place when entering multiple lines of code for different customizations? My site is http://www.roamingjosh.org/ Thanks for your time!