Center Nav and Logo

Hello,

I have been working with Awaken for a little while and I had my Nav Bar and my Logo centered with the code

.site-branding .site-brand-container {
float: none;
}
.site-logo {
text-align: center;
}

for the logo and

#site-navigation {
text-align: center;
}
#site-navigation li{
display: inline;
}
#site-navigation a{
display: inline-block;
}

for the navigation bar. Now for some reason neither are working and nothing is centered, could someone please help me center it again? Thank you. My site is kristinsheehan.com.