how can i make the text in the layer slider bigger on mobile

Hi Guys,

I was wondering how i can fix the size of the text in the layer slider. I gave it an css class, but it doesnt work with the responsive code.

For example i gave a layer the code tekst 3 so in the css i placed this code; /* #Mobile (Landscape)
================================================== */
/* Note: Design for a width of 480px */
@media only screen and (min-width: 480px) and (max-width: 767px) {
.tekst3 {font-size:50px;}
}

When i check it on mobile it doenst change a thing. What am i doin wrong?

Also the picture on the right side needs to come more to the left as well. I also gave that one a class just like the rest but it doenst work.

Can someone help me out?