:root {
    background-color: #000000; 
    color: #FFFFFF;
    font-family: Arial;
    font-size: 14px;
    margin-left: 30%;
    margin-right: 30%;
}

a {
  	color: #FFFFFF;
  }

 @media only screen and (max-width: 600px) {
	  
	  :root {
	    background-color: #000000; 
	    color: #FFFFFF;
	    font-family: Arial;
	    font-size: 14px;
	    margin-left: 10%;
	    margin-right: 10%;
		}

}