glowing text

hi there
if you look at my site https://www.rochbar.com/testingsite/

i have the twitter feed on the right – however when the slides on that page animate you will notice (in safari and chrome) that the body of the twitter feed kinda glows as the sliders animate…
i had this issue with other links on the site but overcome them by using this in the css…

body {
-webkit-font-smoothing: antialiased; /* Fix for webkit rendering */
font-smooth:always;
-webkit-text-stroke: 0.5px;
}

i was wondering if htere was a way to implement that into the twitter feed css so that it doesnt glow when the sliders animate…. i tried adding it to the admin.css but that didnt work – i presume the css is held elsewhere?!

please let me know what i can do thanks in advance!!

https://www.ads-software.com/extend/plugins/wp-twitter-feed/