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rahul tiwari 110rahul tiwari 110 

refuse to apply style from lightning becuz its MIME type ('text/html') is not a supported stylesheet MIME type

Hi everyone,
I'm new to lightning & trying to make a responsive design by media queries like this
@media  all and (max-width : 1280px) {
 .THIS .columngap {    
     color : red;
    }
}

<div class=" columngap">
     Contact Us
 </div>

but I keep getting the above error in inspect and strict MIME checking is enabled.
so anyone can pls tell me the solution for it 

Thanks in advance
Naveen KNNaveen KN
I am able to save the above mentioned code in the lighting component and no error. Is the error in Aura or LWC?